| /* |
| * fs/nfs/nfs4proc.c |
| * |
| * Client-side procedure declarations for NFSv4. |
| * |
| * Copyright (c) 2002 The Regents of the University of Michigan. |
| * All rights reserved. |
| * |
| * Kendrick Smith <kmsmith@umich.edu> |
| * Andy Adamson <andros@umich.edu> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <linux/mm.h> |
| #include <linux/delay.h> |
| #include <linux/errno.h> |
| #include <linux/file.h> |
| #include <linux/string.h> |
| #include <linux/ratelimit.h> |
| #include <linux/printk.h> |
| #include <linux/slab.h> |
| #include <linux/sunrpc/clnt.h> |
| #include <linux/nfs.h> |
| #include <linux/nfs4.h> |
| #include <linux/nfs_fs.h> |
| #include <linux/nfs_page.h> |
| #include <linux/nfs_mount.h> |
| #include <linux/namei.h> |
| #include <linux/mount.h> |
| #include <linux/module.h> |
| #include <linux/xattr.h> |
| #include <linux/utsname.h> |
| #include <linux/freezer.h> |
| |
| #include "nfs4_fs.h" |
| #include "delegation.h" |
| #include "internal.h" |
| #include "iostat.h" |
| #include "callback.h" |
| #include "pnfs.h" |
| #include "netns.h" |
| #include "nfs4idmap.h" |
| #include "nfs4session.h" |
| #include "fscache.h" |
| |
| #include "nfs4trace.h" |
| |
| #define NFSDBG_FACILITY NFSDBG_PROC |
| |
| #define NFS4_POLL_RETRY_MIN (HZ/10) |
| #define NFS4_POLL_RETRY_MAX (15*HZ) |
| |
| struct nfs4_opendata; |
| static int _nfs4_proc_open(struct nfs4_opendata *data); |
| static int _nfs4_recover_proc_open(struct nfs4_opendata *data); |
| static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
| static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *); |
| static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); |
| static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label); |
| static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label); |
| static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| struct nfs_fattr *fattr, struct iattr *sattr, |
| struct nfs4_state *state, struct nfs4_label *ilabel, |
| struct nfs4_label *olabel); |
| #ifdef CONFIG_NFS_V4_1 |
| static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, |
| struct rpc_cred *); |
| static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *, |
| struct rpc_cred *); |
| #endif |
| |
| #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
| static inline struct nfs4_label * |
| nfs4_label_init_security(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr, struct nfs4_label *label) |
| { |
| int err; |
| |
| if (label == NULL) |
| return NULL; |
| |
| if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) |
| return NULL; |
| |
| err = security_dentry_init_security(dentry, sattr->ia_mode, |
| &dentry->d_name, (void **)&label->label, &label->len); |
| if (err == 0) |
| return label; |
| |
| return NULL; |
| } |
| static inline void |
| nfs4_label_release_security(struct nfs4_label *label) |
| { |
| if (label) |
| security_release_secctx(label->label, label->len); |
| } |
| static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) |
| { |
| if (label) |
| return server->attr_bitmask; |
| |
| return server->attr_bitmask_nl; |
| } |
| #else |
| static inline struct nfs4_label * |
| nfs4_label_init_security(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr, struct nfs4_label *l) |
| { return NULL; } |
| static inline void |
| nfs4_label_release_security(struct nfs4_label *label) |
| { return; } |
| static inline u32 * |
| nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) |
| { return server->attr_bitmask; } |
| #endif |
| |
| /* Prevent leaks of NFSv4 errors into userland */ |
| static int nfs4_map_errors(int err) |
| { |
| if (err >= -1000) |
| return err; |
| switch (err) { |
| case -NFS4ERR_RESOURCE: |
| case -NFS4ERR_LAYOUTTRYLATER: |
| case -NFS4ERR_RECALLCONFLICT: |
| return -EREMOTEIO; |
| case -NFS4ERR_WRONGSEC: |
| case -NFS4ERR_WRONG_CRED: |
| return -EPERM; |
| case -NFS4ERR_BADOWNER: |
| case -NFS4ERR_BADNAME: |
| return -EINVAL; |
| case -NFS4ERR_SHARE_DENIED: |
| return -EACCES; |
| case -NFS4ERR_MINOR_VERS_MISMATCH: |
| return -EPROTONOSUPPORT; |
| case -NFS4ERR_FILE_OPEN: |
| return -EBUSY; |
| default: |
| dprintk("%s could not handle NFSv4 error %d\n", |
| __func__, -err); |
| break; |
| } |
| return -EIO; |
| } |
| |
| /* |
| * This is our standard bitmap for GETATTR requests. |
| */ |
| const u32 nfs4_fattr_bitmap[3] = { |
| FATTR4_WORD0_TYPE |
| | FATTR4_WORD0_CHANGE |
| | FATTR4_WORD0_SIZE |
| | FATTR4_WORD0_FSID |
| | FATTR4_WORD0_FILEID, |
| FATTR4_WORD1_MODE |
| | FATTR4_WORD1_NUMLINKS |
| | FATTR4_WORD1_OWNER |
| | FATTR4_WORD1_OWNER_GROUP |
| | FATTR4_WORD1_RAWDEV |
| | FATTR4_WORD1_SPACE_USED |
| | FATTR4_WORD1_TIME_ACCESS |
| | FATTR4_WORD1_TIME_METADATA |
| | FATTR4_WORD1_TIME_MODIFY |
| | FATTR4_WORD1_MOUNTED_ON_FILEID, |
| #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
| FATTR4_WORD2_SECURITY_LABEL |
| #endif |
| }; |
| |
| static const u32 nfs4_pnfs_open_bitmap[3] = { |
| FATTR4_WORD0_TYPE |
| | FATTR4_WORD0_CHANGE |
| | FATTR4_WORD0_SIZE |
| | FATTR4_WORD0_FSID |
| | FATTR4_WORD0_FILEID, |
| FATTR4_WORD1_MODE |
| | FATTR4_WORD1_NUMLINKS |
| | FATTR4_WORD1_OWNER |
| | FATTR4_WORD1_OWNER_GROUP |
| | FATTR4_WORD1_RAWDEV |
| | FATTR4_WORD1_SPACE_USED |
| | FATTR4_WORD1_TIME_ACCESS |
| | FATTR4_WORD1_TIME_METADATA |
| | FATTR4_WORD1_TIME_MODIFY, |
| FATTR4_WORD2_MDSTHRESHOLD |
| }; |
| |
| static const u32 nfs4_open_noattr_bitmap[3] = { |
| FATTR4_WORD0_TYPE |
| | FATTR4_WORD0_CHANGE |
| | FATTR4_WORD0_FILEID, |
| }; |
| |
| const u32 nfs4_statfs_bitmap[3] = { |
| FATTR4_WORD0_FILES_AVAIL |
| | FATTR4_WORD0_FILES_FREE |
| | FATTR4_WORD0_FILES_TOTAL, |
| FATTR4_WORD1_SPACE_AVAIL |
| | FATTR4_WORD1_SPACE_FREE |
| | FATTR4_WORD1_SPACE_TOTAL |
| }; |
| |
| const u32 nfs4_pathconf_bitmap[3] = { |
| FATTR4_WORD0_MAXLINK |
| | FATTR4_WORD0_MAXNAME, |
| 0 |
| }; |
| |
| const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE |
| | FATTR4_WORD0_MAXREAD |
| | FATTR4_WORD0_MAXWRITE |
| | FATTR4_WORD0_LEASE_TIME, |
| FATTR4_WORD1_TIME_DELTA |
| | FATTR4_WORD1_FS_LAYOUT_TYPES, |
| FATTR4_WORD2_LAYOUT_BLKSIZE |
| }; |
| |
| const u32 nfs4_fs_locations_bitmap[3] = { |
| FATTR4_WORD0_TYPE |
| | FATTR4_WORD0_CHANGE |
| | FATTR4_WORD0_SIZE |
| | FATTR4_WORD0_FSID |
| | FATTR4_WORD0_FILEID |
| | FATTR4_WORD0_FS_LOCATIONS, |
| FATTR4_WORD1_MODE |
| | FATTR4_WORD1_NUMLINKS |
| | FATTR4_WORD1_OWNER |
| | FATTR4_WORD1_OWNER_GROUP |
| | FATTR4_WORD1_RAWDEV |
| | FATTR4_WORD1_SPACE_USED |
| | FATTR4_WORD1_TIME_ACCESS |
| | FATTR4_WORD1_TIME_METADATA |
| | FATTR4_WORD1_TIME_MODIFY |
| | FATTR4_WORD1_MOUNTED_ON_FILEID, |
| }; |
| |
| static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
| struct nfs4_readdir_arg *readdir) |
| { |
| __be32 *start, *p; |
| |
| if (cookie > 2) { |
| readdir->cookie = cookie; |
| memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
| return; |
| } |
| |
| readdir->cookie = 0; |
| memset(&readdir->verifier, 0, sizeof(readdir->verifier)); |
| if (cookie == 2) |
| return; |
| |
| /* |
| * NFSv4 servers do not return entries for '.' and '..' |
| * Therefore, we fake these entries here. We let '.' |
| * have cookie 0 and '..' have cookie 1. Note that |
| * when talking to the server, we always send cookie 0 |
| * instead of 1 or 2. |
| */ |
| start = p = kmap_atomic(*readdir->pages); |
| |
| if (cookie == 0) { |
| *p++ = xdr_one; /* next */ |
| *p++ = xdr_zero; /* cookie, first word */ |
| *p++ = xdr_one; /* cookie, second word */ |
| *p++ = xdr_one; /* entry len */ |
| memcpy(p, ".\0\0\0", 4); /* entry */ |
| p++; |
| *p++ = xdr_one; /* bitmap length */ |
| *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| *p++ = htonl(8); /* attribute buffer length */ |
| p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); |
| } |
| |
| *p++ = xdr_one; /* next */ |
| *p++ = xdr_zero; /* cookie, first word */ |
| *p++ = xdr_two; /* cookie, second word */ |
| *p++ = xdr_two; /* entry len */ |
| memcpy(p, "..\0\0", 4); /* entry */ |
| p++; |
| *p++ = xdr_one; /* bitmap length */ |
| *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| *p++ = htonl(8); /* attribute buffer length */ |
| p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); |
| |
| readdir->pgbase = (char *)p - (char *)start; |
| readdir->count -= readdir->pgbase; |
| kunmap_atomic(start); |
| } |
| |
| static long nfs4_update_delay(long *timeout) |
| { |
| long ret; |
| if (!timeout) |
| return NFS4_POLL_RETRY_MAX; |
| if (*timeout <= 0) |
| *timeout = NFS4_POLL_RETRY_MIN; |
| if (*timeout > NFS4_POLL_RETRY_MAX) |
| *timeout = NFS4_POLL_RETRY_MAX; |
| ret = *timeout; |
| *timeout <<= 1; |
| return ret; |
| } |
| |
| static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) |
| { |
| int res = 0; |
| |
| might_sleep(); |
| |
| freezable_schedule_timeout_killable_unsafe( |
| nfs4_update_delay(timeout)); |
| if (fatal_signal_pending(current)) |
| res = -ERESTARTSYS; |
| return res; |
| } |
| |
| /* This is the error handling routine for processes that are allowed |
| * to sleep. |
| */ |
| int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
| { |
| struct nfs_client *clp = server->nfs_client; |
| struct nfs4_state *state = exception->state; |
| struct inode *inode = exception->inode; |
| int ret = errorcode; |
| |
| exception->retry = 0; |
| switch(errorcode) { |
| case 0: |
| return 0; |
| case -NFS4ERR_OPENMODE: |
| case -NFS4ERR_DELEG_REVOKED: |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| if (inode && nfs4_have_delegation(inode, FMODE_READ)) { |
| nfs4_inode_return_delegation(inode); |
| exception->retry = 1; |
| return 0; |
| } |
| if (state == NULL) |
| break; |
| ret = nfs4_schedule_stateid_recovery(server, state); |
| if (ret < 0) |
| break; |
| goto wait_on_recovery; |
| case -NFS4ERR_EXPIRED: |
| if (state != NULL) { |
| ret = nfs4_schedule_stateid_recovery(server, state); |
| if (ret < 0) |
| break; |
| } |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_STALE_CLIENTID: |
| nfs4_schedule_lease_recovery(clp); |
| goto wait_on_recovery; |
| case -NFS4ERR_MOVED: |
| ret = nfs4_schedule_migration_recovery(server); |
| if (ret < 0) |
| break; |
| goto wait_on_recovery; |
| case -NFS4ERR_LEASE_MOVED: |
| nfs4_schedule_lease_moved_recovery(clp); |
| goto wait_on_recovery; |
| #if defined(CONFIG_NFS_V4_1) |
| case -NFS4ERR_BADSESSION: |
| case -NFS4ERR_BADSLOT: |
| case -NFS4ERR_BAD_HIGH_SLOT: |
| case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| case -NFS4ERR_DEADSESSION: |
| case -NFS4ERR_SEQ_FALSE_RETRY: |
| case -NFS4ERR_SEQ_MISORDERED: |
| dprintk("%s ERROR: %d Reset session\n", __func__, |
| errorcode); |
| nfs4_schedule_session_recovery(clp->cl_session, errorcode); |
| goto wait_on_recovery; |
| #endif /* defined(CONFIG_NFS_V4_1) */ |
| case -NFS4ERR_FILE_OPEN: |
| if (exception->timeout > HZ) { |
| /* We have retried a decent amount, time to |
| * fail |
| */ |
| ret = -EBUSY; |
| break; |
| } |
| case -NFS4ERR_GRACE: |
| case -NFS4ERR_DELAY: |
| ret = nfs4_delay(server->client, &exception->timeout); |
| if (ret != 0) |
| break; |
| case -NFS4ERR_RETRY_UNCACHED_REP: |
| case -NFS4ERR_OLD_STATEID: |
| exception->retry = 1; |
| break; |
| case -NFS4ERR_BADOWNER: |
| /* The following works around a Linux server bug! */ |
| case -NFS4ERR_BADNAME: |
| if (server->caps & NFS_CAP_UIDGID_NOMAP) { |
| server->caps &= ~NFS_CAP_UIDGID_NOMAP; |
| exception->retry = 1; |
| printk(KERN_WARNING "NFS: v4 server %s " |
| "does not accept raw " |
| "uid/gids. " |
| "Reenabling the idmapper.\n", |
| server->nfs_client->cl_hostname); |
| } |
| } |
| /* We failed to handle the error */ |
| return nfs4_map_errors(ret); |
| wait_on_recovery: |
| ret = nfs4_wait_clnt_recover(clp); |
| if (test_bit(NFS_MIG_FAILED, &server->mig_status)) |
| return -EIO; |
| if (ret == 0) |
| exception->retry = 1; |
| return ret; |
| } |
| |
| /* |
| * Return 'true' if 'clp' is using an rpc_client that is integrity protected |
| * or 'false' otherwise. |
| */ |
| static bool _nfs4_is_integrity_protected(struct nfs_client *clp) |
| { |
| rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; |
| |
| if (flavor == RPC_AUTH_GSS_KRB5I || |
| flavor == RPC_AUTH_GSS_KRB5P) |
| return true; |
| |
| return false; |
| } |
| |
| static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) |
| { |
| spin_lock(&clp->cl_lock); |
| if (time_before(clp->cl_last_renewal,timestamp)) |
| clp->cl_last_renewal = timestamp; |
| spin_unlock(&clp->cl_lock); |
| } |
| |
| static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
| { |
| struct nfs_client *clp = server->nfs_client; |
| |
| if (!nfs4_has_session(clp)) |
| do_renew_lease(clp, timestamp); |
| } |
| |
| struct nfs4_call_sync_data { |
| const struct nfs_server *seq_server; |
| struct nfs4_sequence_args *seq_args; |
| struct nfs4_sequence_res *seq_res; |
| }; |
| |
| void nfs4_init_sequence(struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, int cache_reply) |
| { |
| args->sa_slot = NULL; |
| args->sa_cache_this = cache_reply; |
| args->sa_privileged = 0; |
| |
| res->sr_slot = NULL; |
| } |
| |
| static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) |
| { |
| args->sa_privileged = 1; |
| } |
| |
| int nfs40_setup_sequence(struct nfs4_slot_table *tbl, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| struct rpc_task *task) |
| { |
| struct nfs4_slot *slot; |
| |
| /* slot already allocated? */ |
| if (res->sr_slot != NULL) |
| goto out_start; |
| |
| spin_lock(&tbl->slot_tbl_lock); |
| if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) |
| goto out_sleep; |
| |
| slot = nfs4_alloc_slot(tbl); |
| if (IS_ERR(slot)) { |
| if (slot == ERR_PTR(-ENOMEM)) |
| task->tk_timeout = HZ >> 2; |
| goto out_sleep; |
| } |
| spin_unlock(&tbl->slot_tbl_lock); |
| |
| args->sa_slot = slot; |
| res->sr_slot = slot; |
| |
| out_start: |
| rpc_call_start(task); |
| return 0; |
| |
| out_sleep: |
| if (args->sa_privileged) |
| rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, |
| NULL, RPC_PRIORITY_PRIVILEGED); |
| else |
| rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| spin_unlock(&tbl->slot_tbl_lock); |
| return -EAGAIN; |
| } |
| EXPORT_SYMBOL_GPL(nfs40_setup_sequence); |
| |
| static int nfs40_sequence_done(struct rpc_task *task, |
| struct nfs4_sequence_res *res) |
| { |
| struct nfs4_slot *slot = res->sr_slot; |
| struct nfs4_slot_table *tbl; |
| |
| if (slot == NULL) |
| goto out; |
| |
| tbl = slot->table; |
| spin_lock(&tbl->slot_tbl_lock); |
| if (!nfs41_wake_and_assign_slot(tbl, slot)) |
| nfs4_free_slot(tbl, slot); |
| spin_unlock(&tbl->slot_tbl_lock); |
| |
| res->sr_slot = NULL; |
| out: |
| return 1; |
| } |
| |
| #if defined(CONFIG_NFS_V4_1) |
| |
| static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) |
| { |
| struct nfs4_session *session; |
| struct nfs4_slot_table *tbl; |
| struct nfs4_slot *slot = res->sr_slot; |
| bool send_new_highest_used_slotid = false; |
| |
| tbl = slot->table; |
| session = tbl->session; |
| |
| spin_lock(&tbl->slot_tbl_lock); |
| /* Be nice to the server: try to ensure that the last transmitted |
| * value for highest_user_slotid <= target_highest_slotid |
| */ |
| if (tbl->highest_used_slotid > tbl->target_highest_slotid) |
| send_new_highest_used_slotid = true; |
| |
| if (nfs41_wake_and_assign_slot(tbl, slot)) { |
| send_new_highest_used_slotid = false; |
| goto out_unlock; |
| } |
| nfs4_free_slot(tbl, slot); |
| |
| if (tbl->highest_used_slotid != NFS4_NO_SLOT) |
| send_new_highest_used_slotid = false; |
| out_unlock: |
| spin_unlock(&tbl->slot_tbl_lock); |
| res->sr_slot = NULL; |
| if (send_new_highest_used_slotid) |
| nfs41_notify_server(session->clp); |
| } |
| |
| int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) |
| { |
| struct nfs4_session *session; |
| struct nfs4_slot *slot = res->sr_slot; |
| struct nfs_client *clp; |
| bool interrupted = false; |
| int ret = 1; |
| |
| if (slot == NULL) |
| goto out_noaction; |
| /* don't increment the sequence number if the task wasn't sent */ |
| if (!RPC_WAS_SENT(task)) |
| goto out; |
| |
| session = slot->table->session; |
| |
| if (slot->interrupted) { |
| slot->interrupted = 0; |
| interrupted = true; |
| } |
| |
| trace_nfs4_sequence_done(session, res); |
| /* Check the SEQUENCE operation status */ |
| switch (res->sr_status) { |
| case 0: |
| /* Update the slot's sequence and clientid lease timer */ |
| ++slot->seq_nr; |
| clp = session->clp; |
| do_renew_lease(clp, res->sr_timestamp); |
| /* Check sequence flags */ |
| nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); |
| nfs41_update_target_slotid(slot->table, slot, res); |
| break; |
| case 1: |
| /* |
| * sr_status remains 1 if an RPC level error occurred. |
| * The server may or may not have processed the sequence |
| * operation.. |
| * Mark the slot as having hosted an interrupted RPC call. |
| */ |
| slot->interrupted = 1; |
| goto out; |
| case -NFS4ERR_DELAY: |
| /* The server detected a resend of the RPC call and |
| * returned NFS4ERR_DELAY as per Section 2.10.6.2 |
| * of RFC5661. |
| */ |
| dprintk("%s: slot=%u seq=%u: Operation in progress\n", |
| __func__, |
| slot->slot_nr, |
| slot->seq_nr); |
| goto out_retry; |
| case -NFS4ERR_BADSLOT: |
| /* |
| * The slot id we used was probably retired. Try again |
| * using a different slot id. |
| */ |
| goto retry_nowait; |
| case -NFS4ERR_SEQ_MISORDERED: |
| /* |
| * Was the last operation on this sequence interrupted? |
| * If so, retry after bumping the sequence number. |
| */ |
| if (interrupted) { |
| ++slot->seq_nr; |
| goto retry_nowait; |
| } |
| /* |
| * Could this slot have been previously retired? |
| * If so, then the server may be expecting seq_nr = 1! |
| */ |
| if (slot->seq_nr != 1) { |
| slot->seq_nr = 1; |
| goto retry_nowait; |
| } |
| break; |
| case -NFS4ERR_SEQ_FALSE_RETRY: |
| ++slot->seq_nr; |
| goto retry_nowait; |
| default: |
| /* Just update the slot sequence no. */ |
| ++slot->seq_nr; |
| } |
| out: |
| /* The session may be reset by one of the error handlers. */ |
| dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); |
| nfs41_sequence_free_slot(res); |
| out_noaction: |
| return ret; |
| retry_nowait: |
| if (rpc_restart_call_prepare(task)) { |
| task->tk_status = 0; |
| ret = 0; |
| } |
| goto out; |
| out_retry: |
| if (!rpc_restart_call(task)) |
| goto out; |
| rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(nfs41_sequence_done); |
| |
| int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) |
| { |
| if (res->sr_slot == NULL) |
| return 1; |
| if (!res->sr_slot->table->session) |
| return nfs40_sequence_done(task, res); |
| return nfs41_sequence_done(task, res); |
| } |
| EXPORT_SYMBOL_GPL(nfs4_sequence_done); |
| |
| int nfs41_setup_sequence(struct nfs4_session *session, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| struct rpc_task *task) |
| { |
| struct nfs4_slot *slot; |
| struct nfs4_slot_table *tbl; |
| |
| dprintk("--> %s\n", __func__); |
| /* slot already allocated? */ |
| if (res->sr_slot != NULL) |
| goto out_success; |
| |
| tbl = &session->fc_slot_table; |
| |
| task->tk_timeout = 0; |
| |
| spin_lock(&tbl->slot_tbl_lock); |
| if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) && |
| !args->sa_privileged) { |
| /* The state manager will wait until the slot table is empty */ |
| dprintk("%s session is draining\n", __func__); |
| goto out_sleep; |
| } |
| |
| slot = nfs4_alloc_slot(tbl); |
| if (IS_ERR(slot)) { |
| /* If out of memory, try again in 1/4 second */ |
| if (slot == ERR_PTR(-ENOMEM)) |
| task->tk_timeout = HZ >> 2; |
| dprintk("<-- %s: no free slots\n", __func__); |
| goto out_sleep; |
| } |
| spin_unlock(&tbl->slot_tbl_lock); |
| |
| args->sa_slot = slot; |
| |
| dprintk("<-- %s slotid=%u seqid=%u\n", __func__, |
| slot->slot_nr, slot->seq_nr); |
| |
| res->sr_slot = slot; |
| res->sr_timestamp = jiffies; |
| res->sr_status_flags = 0; |
| /* |
| * sr_status is only set in decode_sequence, and so will remain |
| * set to 1 if an rpc level failure occurs. |
| */ |
| res->sr_status = 1; |
| trace_nfs4_setup_sequence(session, args); |
| out_success: |
| rpc_call_start(task); |
| return 0; |
| out_sleep: |
| /* Privileged tasks are queued with top priority */ |
| if (args->sa_privileged) |
| rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, |
| NULL, RPC_PRIORITY_PRIVILEGED); |
| else |
| rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
| spin_unlock(&tbl->slot_tbl_lock); |
| return -EAGAIN; |
| } |
| EXPORT_SYMBOL_GPL(nfs41_setup_sequence); |
| |
| static int nfs4_setup_sequence(const struct nfs_server *server, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| struct rpc_task *task) |
| { |
| struct nfs4_session *session = nfs4_get_session(server); |
| int ret = 0; |
| |
| if (!session) |
| return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, |
| args, res, task); |
| |
| dprintk("--> %s clp %p session %p sr_slot %u\n", |
| __func__, session->clp, session, res->sr_slot ? |
| res->sr_slot->slot_nr : NFS4_NO_SLOT); |
| |
| ret = nfs41_setup_sequence(session, args, res, task); |
| |
| dprintk("<-- %s status=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_call_sync_data *data = calldata; |
| struct nfs4_session *session = nfs4_get_session(data->seq_server); |
| |
| dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); |
| |
| nfs41_setup_sequence(session, data->seq_args, data->seq_res, task); |
| } |
| |
| static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_call_sync_data *data = calldata; |
| |
| nfs41_sequence_done(task, data->seq_res); |
| } |
| |
| static const struct rpc_call_ops nfs41_call_sync_ops = { |
| .rpc_call_prepare = nfs41_call_sync_prepare, |
| .rpc_call_done = nfs41_call_sync_done, |
| }; |
| |
| #else /* !CONFIG_NFS_V4_1 */ |
| |
| static int nfs4_setup_sequence(const struct nfs_server *server, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| struct rpc_task *task) |
| { |
| return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, |
| args, res, task); |
| } |
| |
| int nfs4_sequence_done(struct rpc_task *task, |
| struct nfs4_sequence_res *res) |
| { |
| return nfs40_sequence_done(task, res); |
| } |
| EXPORT_SYMBOL_GPL(nfs4_sequence_done); |
| |
| #endif /* !CONFIG_NFS_V4_1 */ |
| |
| static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_call_sync_data *data = calldata; |
| nfs4_setup_sequence(data->seq_server, |
| data->seq_args, data->seq_res, task); |
| } |
| |
| static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_call_sync_data *data = calldata; |
| nfs4_sequence_done(task, data->seq_res); |
| } |
| |
| static const struct rpc_call_ops nfs40_call_sync_ops = { |
| .rpc_call_prepare = nfs40_call_sync_prepare, |
| .rpc_call_done = nfs40_call_sync_done, |
| }; |
| |
| static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, |
| struct nfs_server *server, |
| struct rpc_message *msg, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res) |
| { |
| int ret; |
| struct rpc_task *task; |
| struct nfs_client *clp = server->nfs_client; |
| struct nfs4_call_sync_data data = { |
| .seq_server = server, |
| .seq_args = args, |
| .seq_res = res, |
| }; |
| struct rpc_task_setup task_setup = { |
| .rpc_client = clnt, |
| .rpc_message = msg, |
| .callback_ops = clp->cl_mvops->call_sync_ops, |
| .callback_data = &data |
| }; |
| |
| task = rpc_run_task(&task_setup); |
| if (IS_ERR(task)) |
| ret = PTR_ERR(task); |
| else { |
| ret = task->tk_status; |
| rpc_put_task(task); |
| } |
| return ret; |
| } |
| |
| int nfs4_call_sync(struct rpc_clnt *clnt, |
| struct nfs_server *server, |
| struct rpc_message *msg, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| int cache_reply) |
| { |
| nfs4_init_sequence(args, res, cache_reply); |
| return nfs4_call_sync_sequence(clnt, server, msg, args, res); |
| } |
| |
| static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
| { |
| struct nfs_inode *nfsi = NFS_I(dir); |
| |
| spin_lock(&dir->i_lock); |
| nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| if (!cinfo->atomic || cinfo->before != dir->i_version) |
| nfs_force_lookup_revalidate(dir); |
| dir->i_version = cinfo->after; |
| nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
| nfs_fscache_invalidate(dir); |
| spin_unlock(&dir->i_lock); |
| } |
| |
| struct nfs4_opendata { |
| struct kref kref; |
| struct nfs_openargs o_arg; |
| struct nfs_openres o_res; |
| struct nfs_open_confirmargs c_arg; |
| struct nfs_open_confirmres c_res; |
| struct nfs4_string owner_name; |
| struct nfs4_string group_name; |
| struct nfs4_label *a_label; |
| struct nfs_fattr f_attr; |
| struct nfs4_label *f_label; |
| struct dentry *dir; |
| struct dentry *dentry; |
| struct nfs4_state_owner *owner; |
| struct nfs4_state *state; |
| struct iattr attrs; |
| unsigned long timestamp; |
| unsigned int rpc_done : 1; |
| unsigned int file_created : 1; |
| unsigned int is_recover : 1; |
| int rpc_status; |
| int cancelled; |
| }; |
| |
| static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, |
| int err, struct nfs4_exception *exception) |
| { |
| if (err != -EINVAL) |
| return false; |
| if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) |
| return false; |
| server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; |
| exception->retry = 1; |
| return true; |
| } |
| |
| static u32 |
| nfs4_map_atomic_open_share(struct nfs_server *server, |
| fmode_t fmode, int openflags) |
| { |
| u32 res = 0; |
| |
| switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
| case FMODE_READ: |
| res = NFS4_SHARE_ACCESS_READ; |
| break; |
| case FMODE_WRITE: |
| res = NFS4_SHARE_ACCESS_WRITE; |
| break; |
| case FMODE_READ|FMODE_WRITE: |
| res = NFS4_SHARE_ACCESS_BOTH; |
| } |
| if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) |
| goto out; |
| /* Want no delegation if we're using O_DIRECT */ |
| if (openflags & O_DIRECT) |
| res |= NFS4_SHARE_WANT_NO_DELEG; |
| out: |
| return res; |
| } |
| |
| static enum open_claim_type4 |
| nfs4_map_atomic_open_claim(struct nfs_server *server, |
| enum open_claim_type4 claim) |
| { |
| if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) |
| return claim; |
| switch (claim) { |
| default: |
| return claim; |
| case NFS4_OPEN_CLAIM_FH: |
| return NFS4_OPEN_CLAIM_NULL; |
| case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
| return NFS4_OPEN_CLAIM_DELEGATE_CUR; |
| case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
| return NFS4_OPEN_CLAIM_DELEGATE_PREV; |
| } |
| } |
| |
| static void nfs4_init_opendata_res(struct nfs4_opendata *p) |
| { |
| p->o_res.f_attr = &p->f_attr; |
| p->o_res.f_label = p->f_label; |
| p->o_res.seqid = p->o_arg.seqid; |
| p->c_res.seqid = p->c_arg.seqid; |
| p->o_res.server = p->o_arg.server; |
| p->o_res.access_request = p->o_arg.access; |
| nfs_fattr_init(&p->f_attr); |
| nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); |
| } |
| |
| static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, |
| struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
| const struct iattr *attrs, |
| struct nfs4_label *label, |
| enum open_claim_type4 claim, |
| gfp_t gfp_mask) |
| { |
| struct dentry *parent = dget_parent(dentry); |
| struct inode *dir = d_inode(parent); |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); |
| struct nfs4_opendata *p; |
| |
| p = kzalloc(sizeof(*p), gfp_mask); |
| if (p == NULL) |
| goto err; |
| |
| p->f_label = nfs4_label_alloc(server, gfp_mask); |
| if (IS_ERR(p->f_label)) |
| goto err_free_p; |
| |
| p->a_label = nfs4_label_alloc(server, gfp_mask); |
| if (IS_ERR(p->a_label)) |
| goto err_free_f; |
| |
| alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; |
| p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); |
| if (IS_ERR(p->o_arg.seqid)) |
| goto err_free_label; |
| nfs_sb_active(dentry->d_sb); |
| p->dentry = dget(dentry); |
| p->dir = parent; |
| p->owner = sp; |
| atomic_inc(&sp->so_count); |
| p->o_arg.open_flags = flags; |
| p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); |
| p->o_arg.share_access = nfs4_map_atomic_open_share(server, |
| fmode, flags); |
| /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS |
| * will return permission denied for all bits until close */ |
| if (!(flags & O_EXCL)) { |
| /* ask server to check for all possible rights as results |
| * are cached */ |
| p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | |
| NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE; |
| } |
| p->o_arg.clientid = server->nfs_client->cl_clientid; |
| p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); |
| p->o_arg.id.uniquifier = sp->so_seqid.owner_id; |
| p->o_arg.name = &dentry->d_name; |
| p->o_arg.server = server; |
| p->o_arg.bitmask = nfs4_bitmask(server, label); |
| p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; |
| p->o_arg.label = nfs4_label_copy(p->a_label, label); |
| p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); |
| switch (p->o_arg.claim) { |
| case NFS4_OPEN_CLAIM_NULL: |
| case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
| case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
| p->o_arg.fh = NFS_FH(dir); |
| break; |
| case NFS4_OPEN_CLAIM_PREVIOUS: |
| case NFS4_OPEN_CLAIM_FH: |
| case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
| case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
| p->o_arg.fh = NFS_FH(d_inode(dentry)); |
| } |
| if (attrs != NULL && attrs->ia_valid != 0) { |
| __u32 verf[2]; |
| |
| p->o_arg.u.attrs = &p->attrs; |
| memcpy(&p->attrs, attrs, sizeof(p->attrs)); |
| |
| verf[0] = jiffies; |
| verf[1] = current->pid; |
| memcpy(p->o_arg.u.verifier.data, verf, |
| sizeof(p->o_arg.u.verifier.data)); |
| } |
| p->c_arg.fh = &p->o_res.fh; |
| p->c_arg.stateid = &p->o_res.stateid; |
| p->c_arg.seqid = p->o_arg.seqid; |
| nfs4_init_opendata_res(p); |
| kref_init(&p->kref); |
| return p; |
| |
| err_free_label: |
| nfs4_label_free(p->a_label); |
| err_free_f: |
| nfs4_label_free(p->f_label); |
| err_free_p: |
| kfree(p); |
| err: |
| dput(parent); |
| return NULL; |
| } |
| |
| static void nfs4_opendata_free(struct kref *kref) |
| { |
| struct nfs4_opendata *p = container_of(kref, |
| struct nfs4_opendata, kref); |
| struct super_block *sb = p->dentry->d_sb; |
| |
| nfs_free_seqid(p->o_arg.seqid); |
| if (p->state != NULL) |
| nfs4_put_open_state(p->state); |
| nfs4_put_state_owner(p->owner); |
| |
| nfs4_label_free(p->a_label); |
| nfs4_label_free(p->f_label); |
| |
| dput(p->dir); |
| dput(p->dentry); |
| nfs_sb_deactive(sb); |
| nfs_fattr_free_names(&p->f_attr); |
| kfree(p->f_attr.mdsthreshold); |
| kfree(p); |
| } |
| |
| static void nfs4_opendata_put(struct nfs4_opendata *p) |
| { |
| if (p != NULL) |
| kref_put(&p->kref, nfs4_opendata_free); |
| } |
| |
| static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
| { |
| int ret; |
| |
| ret = rpc_wait_for_completion_task(task); |
| return ret; |
| } |
| |
| static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, |
| fmode_t fmode) |
| { |
| switch(fmode & (FMODE_READ|FMODE_WRITE)) { |
| case FMODE_READ|FMODE_WRITE: |
| return state->n_rdwr != 0; |
| case FMODE_WRITE: |
| return state->n_wronly != 0; |
| case FMODE_READ: |
| return state->n_rdonly != 0; |
| } |
| WARN_ON_ONCE(1); |
| return false; |
| } |
| |
| static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
| { |
| int ret = 0; |
| |
| if (open_mode & (O_EXCL|O_TRUNC)) |
| goto out; |
| switch (mode & (FMODE_READ|FMODE_WRITE)) { |
| case FMODE_READ: |
| ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 |
| && state->n_rdonly != 0; |
| break; |
| case FMODE_WRITE: |
| ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 |
| && state->n_wronly != 0; |
| break; |
| case FMODE_READ|FMODE_WRITE: |
| ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 |
| && state->n_rdwr != 0; |
| } |
| out: |
| return ret; |
| } |
| |
| static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, |
| enum open_claim_type4 claim) |
| { |
| if (delegation == NULL) |
| return 0; |
| if ((delegation->type & fmode) != fmode) |
| return 0; |
| if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) |
| return 0; |
| switch (claim) { |
| case NFS4_OPEN_CLAIM_NULL: |
| case NFS4_OPEN_CLAIM_FH: |
| break; |
| case NFS4_OPEN_CLAIM_PREVIOUS: |
| if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
| break; |
| default: |
| return 0; |
| } |
| nfs_mark_delegation_referenced(delegation); |
| return 1; |
| } |
| |
| static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
| { |
| switch (fmode) { |
| case FMODE_WRITE: |
| state->n_wronly++; |
| break; |
| case FMODE_READ: |
| state->n_rdonly++; |
| break; |
| case FMODE_READ|FMODE_WRITE: |
| state->n_rdwr++; |
| } |
| nfs4_state_set_mode_locked(state, state->state | fmode); |
| } |
| |
| static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) |
| { |
| struct nfs_client *clp = state->owner->so_server->nfs_client; |
| bool need_recover = false; |
| |
| if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) |
| need_recover = true; |
| if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) |
| need_recover = true; |
| if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) |
| need_recover = true; |
| if (need_recover) |
| nfs4_state_mark_reclaim_nograce(clp, state); |
| } |
| |
| static bool nfs_need_update_open_stateid(struct nfs4_state *state, |
| nfs4_stateid *stateid) |
| { |
| if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0) |
| return true; |
| if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) { |
| nfs_test_and_clear_all_open_stateid(state); |
| return true; |
| } |
| if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) |
| return true; |
| return false; |
| } |
| |
| static void nfs_resync_open_stateid_locked(struct nfs4_state *state) |
| { |
| if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) |
| return; |
| if (state->n_wronly) |
| set_bit(NFS_O_WRONLY_STATE, &state->flags); |
| if (state->n_rdonly) |
| set_bit(NFS_O_RDONLY_STATE, &state->flags); |
| if (state->n_rdwr) |
| set_bit(NFS_O_RDWR_STATE, &state->flags); |
| set_bit(NFS_OPEN_STATE, &state->flags); |
| } |
| |
| static void nfs_clear_open_stateid_locked(struct nfs4_state *state, |
| nfs4_stateid *arg_stateid, |
| nfs4_stateid *stateid, fmode_t fmode) |
| { |
| clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| switch (fmode & (FMODE_READ|FMODE_WRITE)) { |
| case FMODE_WRITE: |
| clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| break; |
| case FMODE_READ: |
| clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| break; |
| case 0: |
| clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| clear_bit(NFS_OPEN_STATE, &state->flags); |
| } |
| if (stateid == NULL) |
| return; |
| /* Handle races with OPEN */ |
| if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) || |
| (nfs4_stateid_match_other(stateid, &state->open_stateid) && |
| !nfs4_stateid_is_newer(stateid, &state->open_stateid))) { |
| nfs_resync_open_stateid_locked(state); |
| return; |
| } |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
| nfs4_stateid_copy(&state->stateid, stateid); |
| nfs4_stateid_copy(&state->open_stateid, stateid); |
| } |
| |
| static void nfs_clear_open_stateid(struct nfs4_state *state, |
| nfs4_stateid *arg_stateid, |
| nfs4_stateid *stateid, fmode_t fmode) |
| { |
| write_seqlock(&state->seqlock); |
| nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode); |
| write_sequnlock(&state->seqlock); |
| if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) |
| nfs4_schedule_state_manager(state->owner->so_server->nfs_client); |
| } |
| |
| static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
| { |
| switch (fmode) { |
| case FMODE_READ: |
| set_bit(NFS_O_RDONLY_STATE, &state->flags); |
| break; |
| case FMODE_WRITE: |
| set_bit(NFS_O_WRONLY_STATE, &state->flags); |
| break; |
| case FMODE_READ|FMODE_WRITE: |
| set_bit(NFS_O_RDWR_STATE, &state->flags); |
| } |
| if (!nfs_need_update_open_stateid(state, stateid)) |
| return; |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
| nfs4_stateid_copy(&state->stateid, stateid); |
| nfs4_stateid_copy(&state->open_stateid, stateid); |
| } |
| |
| static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
| { |
| /* |
| * Protect the call to nfs4_state_set_mode_locked and |
| * serialise the stateid update |
| */ |
| write_seqlock(&state->seqlock); |
| if (deleg_stateid != NULL) { |
| nfs4_stateid_copy(&state->stateid, deleg_stateid); |
| set_bit(NFS_DELEGATED_STATE, &state->flags); |
| } |
| if (open_stateid != NULL) |
| nfs_set_open_stateid_locked(state, open_stateid, fmode); |
| write_sequnlock(&state->seqlock); |
| spin_lock(&state->owner->so_lock); |
| update_open_stateflags(state, fmode); |
| spin_unlock(&state->owner->so_lock); |
| } |
| |
| static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
| { |
| struct nfs_inode *nfsi = NFS_I(state->inode); |
| struct nfs_delegation *deleg_cur; |
| int ret = 0; |
| |
| fmode &= (FMODE_READ|FMODE_WRITE); |
| |
| rcu_read_lock(); |
| deleg_cur = rcu_dereference(nfsi->delegation); |
| if (deleg_cur == NULL) |
| goto no_delegation; |
| |
| spin_lock(&deleg_cur->lock); |
| if (rcu_dereference(nfsi->delegation) != deleg_cur || |
| test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || |
| (deleg_cur->type & fmode) != fmode) |
| goto no_delegation_unlock; |
| |
| if (delegation == NULL) |
| delegation = &deleg_cur->stateid; |
| else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) |
| goto no_delegation_unlock; |
| |
| nfs_mark_delegation_referenced(deleg_cur); |
| __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
| ret = 1; |
| no_delegation_unlock: |
| spin_unlock(&deleg_cur->lock); |
| no_delegation: |
| rcu_read_unlock(); |
| |
| if (!ret && open_stateid != NULL) { |
| __update_open_stateid(state, open_stateid, NULL, fmode); |
| ret = 1; |
| } |
| if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) |
| nfs4_schedule_state_manager(state->owner->so_server->nfs_client); |
| |
| return ret; |
| } |
| |
| static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, |
| const nfs4_stateid *stateid) |
| { |
| struct nfs4_state *state = lsp->ls_state; |
| bool ret = false; |
| |
| spin_lock(&state->state_lock); |
| if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) |
| goto out_noupdate; |
| if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) |
| goto out_noupdate; |
| nfs4_stateid_copy(&lsp->ls_stateid, stateid); |
| ret = true; |
| out_noupdate: |
| spin_unlock(&state->state_lock); |
| return ret; |
| } |
| |
| static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
| { |
| struct nfs_delegation *delegation; |
| |
| rcu_read_lock(); |
| delegation = rcu_dereference(NFS_I(inode)->delegation); |
| if (delegation == NULL || (delegation->type & fmode) == fmode) { |
| rcu_read_unlock(); |
| return; |
| } |
| rcu_read_unlock(); |
| nfs4_inode_return_delegation(inode); |
| } |
| |
| static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
| { |
| struct nfs4_state *state = opendata->state; |
| struct nfs_inode *nfsi = NFS_I(state->inode); |
| struct nfs_delegation *delegation; |
| int open_mode = opendata->o_arg.open_flags; |
| fmode_t fmode = opendata->o_arg.fmode; |
| enum open_claim_type4 claim = opendata->o_arg.claim; |
| nfs4_stateid stateid; |
| int ret = -EAGAIN; |
| |
| for (;;) { |
| spin_lock(&state->owner->so_lock); |
| if (can_open_cached(state, fmode, open_mode)) { |
| update_open_stateflags(state, fmode); |
| spin_unlock(&state->owner->so_lock); |
| goto out_return_state; |
| } |
| spin_unlock(&state->owner->so_lock); |
| rcu_read_lock(); |
| delegation = rcu_dereference(nfsi->delegation); |
| if (!can_open_delegated(delegation, fmode, claim)) { |
| rcu_read_unlock(); |
| break; |
| } |
| /* Save the delegation */ |
| nfs4_stateid_copy(&stateid, &delegation->stateid); |
| rcu_read_unlock(); |
| nfs_release_seqid(opendata->o_arg.seqid); |
| if (!opendata->is_recover) { |
| ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
| if (ret != 0) |
| goto out; |
| } |
| ret = -EAGAIN; |
| |
| /* Try to update the stateid using the delegation */ |
| if (update_open_stateid(state, NULL, &stateid, fmode)) |
| goto out_return_state; |
| } |
| out: |
| return ERR_PTR(ret); |
| out_return_state: |
| atomic_inc(&state->count); |
| return state; |
| } |
| |
| static void |
| nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) |
| { |
| struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; |
| struct nfs_delegation *delegation; |
| int delegation_flags = 0; |
| |
| rcu_read_lock(); |
| delegation = rcu_dereference(NFS_I(state->inode)->delegation); |
| if (delegation) |
| delegation_flags = delegation->flags; |
| rcu_read_unlock(); |
| switch (data->o_arg.claim) { |
| default: |
| break; |
| case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
| case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
| pr_err_ratelimited("NFS: Broken NFSv4 server %s is " |
| "returning a delegation for " |
| "OPEN(CLAIM_DELEGATE_CUR)\n", |
| clp->cl_hostname); |
| return; |
| } |
| if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
| nfs_inode_set_delegation(state->inode, |
| data->owner->so_cred, |
| &data->o_res); |
| else |
| nfs_inode_reclaim_delegation(state->inode, |
| data->owner->so_cred, |
| &data->o_res); |
| } |
| |
| /* |
| * Check the inode attributes against the CLAIM_PREVIOUS returned attributes |
| * and update the nfs4_state. |
| */ |
| static struct nfs4_state * |
| _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) |
| { |
| struct inode *inode = data->state->inode; |
| struct nfs4_state *state = data->state; |
| int ret; |
| |
| if (!data->rpc_done) { |
| if (data->rpc_status) { |
| ret = data->rpc_status; |
| goto err; |
| } |
| /* cached opens have already been processed */ |
| goto update; |
| } |
| |
| ret = nfs_refresh_inode(inode, &data->f_attr); |
| if (ret) |
| goto err; |
| |
| if (data->o_res.delegation_type != 0) |
| nfs4_opendata_check_deleg(data, state); |
| update: |
| update_open_stateid(state, &data->o_res.stateid, NULL, |
| data->o_arg.fmode); |
| atomic_inc(&state->count); |
| |
| return state; |
| err: |
| return ERR_PTR(ret); |
| |
| } |
| |
| static struct nfs4_state * |
| _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
| { |
| struct inode *inode; |
| struct nfs4_state *state = NULL; |
| int ret; |
| |
| if (!data->rpc_done) { |
| state = nfs4_try_open_cached(data); |
| goto out; |
| } |
| |
| ret = -EAGAIN; |
| if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
| goto err; |
| inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label); |
| ret = PTR_ERR(inode); |
| if (IS_ERR(inode)) |
| goto err; |
| ret = -ENOMEM; |
| state = nfs4_get_open_state(inode, data->owner); |
| if (state == NULL) |
| goto err_put_inode; |
| if (data->o_res.delegation_type != 0) |
| nfs4_opendata_check_deleg(data, state); |
| update_open_stateid(state, &data->o_res.stateid, NULL, |
| data->o_arg.fmode); |
| iput(inode); |
| out: |
| nfs_release_seqid(data->o_arg.seqid); |
| return state; |
| err_put_inode: |
| iput(inode); |
| err: |
| return ERR_PTR(ret); |
| } |
| |
| static struct nfs4_state * |
| nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
| { |
| if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) |
| return _nfs4_opendata_reclaim_to_nfs4_state(data); |
| return _nfs4_opendata_to_nfs4_state(data); |
| } |
| |
| static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
| { |
| struct nfs_inode *nfsi = NFS_I(state->inode); |
| struct nfs_open_context *ctx; |
| |
| spin_lock(&state->inode->i_lock); |
| list_for_each_entry(ctx, &nfsi->open_files, list) { |
| if (ctx->state != state) |
| continue; |
| get_nfs_open_context(ctx); |
| spin_unlock(&state->inode->i_lock); |
| return ctx; |
| } |
| spin_unlock(&state->inode->i_lock); |
| return ERR_PTR(-ENOENT); |
| } |
| |
| static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, |
| struct nfs4_state *state, enum open_claim_type4 claim) |
| { |
| struct nfs4_opendata *opendata; |
| |
| opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, |
| NULL, NULL, claim, GFP_NOFS); |
| if (opendata == NULL) |
| return ERR_PTR(-ENOMEM); |
| opendata->state = state; |
| atomic_inc(&state->count); |
| return opendata; |
| } |
| |
| static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, |
| fmode_t fmode) |
| { |
| struct nfs4_state *newstate; |
| int ret; |
| |
| if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) |
| return 0; |
| opendata->o_arg.open_flags = 0; |
| opendata->o_arg.fmode = fmode; |
| opendata->o_arg.share_access = nfs4_map_atomic_open_share( |
| NFS_SB(opendata->dentry->d_sb), |
| fmode, 0); |
| memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
| memset(&opendata->c_res, 0, sizeof(opendata->c_res)); |
| nfs4_init_opendata_res(opendata); |
| ret = _nfs4_recover_proc_open(opendata); |
| if (ret != 0) |
| return ret; |
| newstate = nfs4_opendata_to_nfs4_state(opendata); |
| if (IS_ERR(newstate)) |
| return PTR_ERR(newstate); |
| if (newstate != opendata->state) |
| ret = -ESTALE; |
| nfs4_close_state(newstate, fmode); |
| return ret; |
| } |
| |
| static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) |
| { |
| int ret; |
| |
| /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */ |
| clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| /* memory barrier prior to reading state->n_* */ |
| clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| clear_bit(NFS_OPEN_STATE, &state->flags); |
| smp_rmb(); |
| ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); |
| if (ret != 0) |
| return ret; |
| ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); |
| if (ret != 0) |
| return ret; |
| ret = nfs4_open_recover_helper(opendata, FMODE_READ); |
| if (ret != 0) |
| return ret; |
| /* |
| * We may have performed cached opens for all three recoveries. |
| * Check if we need to update the current stateid. |
| */ |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && |
| !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { |
| write_seqlock(&state->seqlock); |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
| nfs4_stateid_copy(&state->stateid, &state->open_stateid); |
| write_sequnlock(&state->seqlock); |
| } |
| return 0; |
| } |
| |
| /* |
| * OPEN_RECLAIM: |
| * reclaim state on the server after a reboot. |
| */ |
| static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
| { |
| struct nfs_delegation *delegation; |
| struct nfs4_opendata *opendata; |
| fmode_t delegation_type = 0; |
| int status; |
| |
| opendata = nfs4_open_recoverdata_alloc(ctx, state, |
| NFS4_OPEN_CLAIM_PREVIOUS); |
| if (IS_ERR(opendata)) |
| return PTR_ERR(opendata); |
| rcu_read_lock(); |
| delegation = rcu_dereference(NFS_I(state->inode)->delegation); |
| if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
| delegation_type = delegation->type; |
| rcu_read_unlock(); |
| opendata->o_arg.u.delegation_type = delegation_type; |
| status = nfs4_open_recover(opendata, state); |
| nfs4_opendata_put(opendata); |
| return status; |
| } |
| |
| static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_do_open_reclaim(ctx, state); |
| trace_nfs4_open_reclaim(ctx, 0, err); |
| if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) |
| continue; |
| if (err != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| { |
| struct nfs_open_context *ctx; |
| int ret; |
| |
| ctx = nfs4_state_find_open_context(state); |
| if (IS_ERR(ctx)) |
| return -EAGAIN; |
| ret = nfs4_do_open_reclaim(ctx, state); |
| put_nfs_open_context(ctx); |
| return ret; |
| } |
| |
| static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err) |
| { |
| switch (err) { |
| default: |
| printk(KERN_ERR "NFS: %s: unhandled error " |
| "%d.\n", __func__, err); |
| case 0: |
| case -ENOENT: |
| case -EAGAIN: |
| case -ESTALE: |
| break; |
| case -NFS4ERR_BADSESSION: |
| case -NFS4ERR_BADSLOT: |
| case -NFS4ERR_BAD_HIGH_SLOT: |
| case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| case -NFS4ERR_DEADSESSION: |
| set_bit(NFS_DELEGATED_STATE, &state->flags); |
| nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); |
| return -EAGAIN; |
| case -NFS4ERR_STALE_CLIENTID: |
| case -NFS4ERR_STALE_STATEID: |
| set_bit(NFS_DELEGATED_STATE, &state->flags); |
| case -NFS4ERR_EXPIRED: |
| /* Don't recall a delegation if it was lost */ |
| nfs4_schedule_lease_recovery(server->nfs_client); |
| return -EAGAIN; |
| case -NFS4ERR_MOVED: |
| nfs4_schedule_migration_recovery(server); |
| return -EAGAIN; |
| case -NFS4ERR_LEASE_MOVED: |
| nfs4_schedule_lease_moved_recovery(server->nfs_client); |
| return -EAGAIN; |
| case -NFS4ERR_DELEG_REVOKED: |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| case -NFS4ERR_OPENMODE: |
| nfs_inode_find_state_and_recover(state->inode, |
| stateid); |
| nfs4_schedule_stateid_recovery(server, state); |
| return -EAGAIN; |
| case -NFS4ERR_DELAY: |
| case -NFS4ERR_GRACE: |
| set_bit(NFS_DELEGATED_STATE, &state->flags); |
| ssleep(1); |
| return -EAGAIN; |
| case -ENOMEM: |
| case -NFS4ERR_DENIED: |
| /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
| return 0; |
| } |
| return err; |
| } |
| |
| int nfs4_open_delegation_recall(struct nfs_open_context *ctx, |
| struct nfs4_state *state, const nfs4_stateid *stateid, |
| fmode_t type) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_opendata *opendata; |
| int err = 0; |
| |
| opendata = nfs4_open_recoverdata_alloc(ctx, state, |
| NFS4_OPEN_CLAIM_DELEG_CUR_FH); |
| if (IS_ERR(opendata)) |
| return PTR_ERR(opendata); |
| nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); |
| clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| switch (type & (FMODE_READ|FMODE_WRITE)) { |
| case FMODE_READ|FMODE_WRITE: |
| case FMODE_WRITE: |
| err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); |
| if (err) |
| break; |
| err = nfs4_open_recover_helper(opendata, FMODE_WRITE); |
| if (err) |
| break; |
| case FMODE_READ: |
| err = nfs4_open_recover_helper(opendata, FMODE_READ); |
| } |
| nfs4_opendata_put(opendata); |
| return nfs4_handle_delegation_recall_error(server, state, stateid, err); |
| } |
| |
| static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| |
| nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl, |
| &data->c_arg.seq_args, &data->c_res.seq_res, task); |
| } |
| |
| static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| |
| nfs40_sequence_done(task, &data->c_res.seq_res); |
| |
| data->rpc_status = task->tk_status; |
| if (data->rpc_status == 0) { |
| nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); |
| nfs_confirm_seqid(&data->owner->so_seqid, 0); |
| renew_lease(data->o_res.server, data->timestamp); |
| data->rpc_done = 1; |
| } |
| } |
| |
| static void nfs4_open_confirm_release(void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| struct nfs4_state *state = NULL; |
| |
| /* If this request hasn't been cancelled, do nothing */ |
| if (data->cancelled == 0) |
| goto out_free; |
| /* In case of error, no cleanup! */ |
| if (!data->rpc_done) |
| goto out_free; |
| state = nfs4_opendata_to_nfs4_state(data); |
| if (!IS_ERR(state)) |
| nfs4_close_state(state, data->o_arg.fmode); |
| out_free: |
| nfs4_opendata_put(data); |
| } |
| |
| static const struct rpc_call_ops nfs4_open_confirm_ops = { |
| .rpc_call_prepare = nfs4_open_confirm_prepare, |
| .rpc_call_done = nfs4_open_confirm_done, |
| .rpc_release = nfs4_open_confirm_release, |
| }; |
| |
| /* |
| * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata |
| */ |
| static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) |
| { |
| struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], |
| .rpc_argp = &data->c_arg, |
| .rpc_resp = &data->c_res, |
| .rpc_cred = data->owner->so_cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_open_confirm_ops, |
| .callback_data = data, |
| .workqueue = nfsiod_workqueue, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int status; |
| |
| nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1); |
| kref_get(&data->kref); |
| data->rpc_done = 0; |
| data->rpc_status = 0; |
| data->timestamp = jiffies; |
| if (data->is_recover) |
| nfs4_set_sequence_privileged(&data->c_arg.seq_args); |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status != 0) { |
| data->cancelled = 1; |
| smp_wmb(); |
| } else |
| status = data->rpc_status; |
| rpc_put_task(task); |
| return status; |
| } |
| |
| static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| struct nfs4_state_owner *sp = data->owner; |
| struct nfs_client *clp = sp->so_server->nfs_client; |
| enum open_claim_type4 claim = data->o_arg.claim; |
| |
| if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
| goto out_wait; |
| /* |
| * Check if we still need to send an OPEN call, or if we can use |
| * a delegation instead. |
| */ |
| if (data->state != NULL) { |
| struct nfs_delegation *delegation; |
| |
| if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
| goto out_no_action; |
| rcu_read_lock(); |
| delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); |
| if (can_open_delegated(delegation, data->o_arg.fmode, claim)) |
| goto unlock_no_action; |
| rcu_read_unlock(); |
| } |
| /* Update client id. */ |
| data->o_arg.clientid = clp->cl_clientid; |
| switch (claim) { |
| default: |
| break; |
| case NFS4_OPEN_CLAIM_PREVIOUS: |
| case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
| case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
| data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; |
| case NFS4_OPEN_CLAIM_FH: |
| task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
| nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
| } |
| data->timestamp = jiffies; |
| if (nfs4_setup_sequence(data->o_arg.server, |
| &data->o_arg.seq_args, |
| &data->o_res.seq_res, |
| task) != 0) |
| nfs_release_seqid(data->o_arg.seqid); |
| |
| /* Set the create mode (note dependency on the session type) */ |
| data->o_arg.createmode = NFS4_CREATE_UNCHECKED; |
| if (data->o_arg.open_flags & O_EXCL) { |
| data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; |
| if (nfs4_has_persistent_session(clp)) |
| data->o_arg.createmode = NFS4_CREATE_GUARDED; |
| else if (clp->cl_mvops->minor_version > 0) |
| data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; |
| } |
| return; |
| unlock_no_action: |
| rcu_read_unlock(); |
| out_no_action: |
| task->tk_action = NULL; |
| out_wait: |
| nfs4_sequence_done(task, &data->o_res.seq_res); |
| } |
| |
| static void nfs4_open_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| |
| data->rpc_status = task->tk_status; |
| |
| if (!nfs4_sequence_done(task, &data->o_res.seq_res)) |
| return; |
| |
| if (task->tk_status == 0) { |
| if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { |
| switch (data->o_res.f_attr->mode & S_IFMT) { |
| case S_IFREG: |
| break; |
| case S_IFLNK: |
| data->rpc_status = -ELOOP; |
| break; |
| case S_IFDIR: |
| data->rpc_status = -EISDIR; |
| break; |
| default: |
| data->rpc_status = -ENOTDIR; |
| } |
| } |
| renew_lease(data->o_res.server, data->timestamp); |
| if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
| nfs_confirm_seqid(&data->owner->so_seqid, 0); |
| } |
| data->rpc_done = 1; |
| } |
| |
| static void nfs4_open_release(void *calldata) |
| { |
| struct nfs4_opendata *data = calldata; |
| struct nfs4_state *state = NULL; |
| |
| /* If this request hasn't been cancelled, do nothing */ |
| if (data->cancelled == 0) |
| goto out_free; |
| /* In case of error, no cleanup! */ |
| if (data->rpc_status != 0 || !data->rpc_done) |
| goto out_free; |
| /* In case we need an open_confirm, no cleanup! */ |
| if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) |
| goto out_free; |
| state = nfs4_opendata_to_nfs4_state(data); |
| if (!IS_ERR(state)) |
| nfs4_close_state(state, data->o_arg.fmode); |
| out_free: |
| nfs4_opendata_put(data); |
| } |
| |
| static const struct rpc_call_ops nfs4_open_ops = { |
| .rpc_call_prepare = nfs4_open_prepare, |
| .rpc_call_done = nfs4_open_done, |
| .rpc_release = nfs4_open_release, |
| }; |
| |
| static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) |
| { |
| struct inode *dir = d_inode(data->dir); |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_openargs *o_arg = &data->o_arg; |
| struct nfs_openres *o_res = &data->o_res; |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], |
| .rpc_argp = o_arg, |
| .rpc_resp = o_res, |
| .rpc_cred = data->owner->so_cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_open_ops, |
| .callback_data = data, |
| .workqueue = nfsiod_workqueue, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int status; |
| |
| nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); |
| kref_get(&data->kref); |
| data->rpc_done = 0; |
| data->rpc_status = 0; |
| data->cancelled = 0; |
| data->is_recover = 0; |
| if (isrecover) { |
| nfs4_set_sequence_privileged(&o_arg->seq_args); |
| data->is_recover = 1; |
| } |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status != 0) { |
| data->cancelled = 1; |
| smp_wmb(); |
| } else |
| status = data->rpc_status; |
| rpc_put_task(task); |
| |
| return status; |
| } |
| |
| static int _nfs4_recover_proc_open(struct nfs4_opendata *data) |
| { |
| struct inode *dir = d_inode(data->dir); |
| struct nfs_openres *o_res = &data->o_res; |
| int status; |
| |
| status = nfs4_run_open_task(data, 1); |
| if (status != 0 || !data->rpc_done) |
| return status; |
| |
| nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); |
| |
| if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| status = _nfs4_proc_open_confirm(data); |
| if (status != 0) |
| return status; |
| } |
| |
| return status; |
| } |
| |
| /* |
| * Additional permission checks in order to distinguish between an |
| * open for read, and an open for execute. This works around the |
| * fact that NFSv4 OPEN treats read and execute permissions as being |
| * the same. |
| * Note that in the non-execute case, we want to turn off permission |
| * checking if we just created a new file (POSIX open() semantics). |
| */ |
| static int nfs4_opendata_access(struct rpc_cred *cred, |
| struct nfs4_opendata *opendata, |
| struct nfs4_state *state, fmode_t fmode, |
| int openflags) |
| { |
| struct nfs_access_entry cache; |
| u32 mask; |
| |
| /* access call failed or for some reason the server doesn't |
| * support any access modes -- defer access call until later */ |
| if (opendata->o_res.access_supported == 0) |
| return 0; |
| |
| mask = 0; |
| /* |
| * Use openflags to check for exec, because fmode won't |
| * always have FMODE_EXEC set when file open for exec. |
| */ |
| if (openflags & __FMODE_EXEC) { |
| /* ONLY check for exec rights */ |
| mask = MAY_EXEC; |
| } else if ((fmode & FMODE_READ) && !opendata->file_created) |
| mask = MAY_READ; |
| |
| cache.cred = cred; |
| cache.jiffies = jiffies; |
| nfs_access_set_mask(&cache, opendata->o_res.access_result); |
| nfs_access_add_cache(state->inode, &cache); |
| |
| if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0) |
| return 0; |
| |
| /* even though OPEN succeeded, access is denied. Close the file */ |
| nfs4_close_state(state, fmode); |
| return -EACCES; |
| } |
| |
| /* |
| * Note: On error, nfs4_proc_open will free the struct nfs4_opendata |
| */ |
| static int _nfs4_proc_open(struct nfs4_opendata *data) |
| { |
| struct inode *dir = d_inode(data->dir); |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_openargs *o_arg = &data->o_arg; |
| struct nfs_openres *o_res = &data->o_res; |
| int status; |
| |
| status = nfs4_run_open_task(data, 0); |
| if (!data->rpc_done) |
| return status; |
| if (status != 0) { |
| if (status == -NFS4ERR_BADNAME && |
| !(o_arg->open_flags & O_CREAT)) |
| return -ENOENT; |
| return status; |
| } |
| |
| nfs_fattr_map_and_free_names(server, &data->f_attr); |
| |
| if (o_arg->open_flags & O_CREAT) { |
| update_changeattr(dir, &o_res->cinfo); |
| if (o_arg->open_flags & O_EXCL) |
| data->file_created = 1; |
| else if (o_res->cinfo.before != o_res->cinfo.after) |
| data->file_created = 1; |
| } |
| if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) |
| server->caps &= ~NFS_CAP_POSIX_LOCK; |
| if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| status = _nfs4_proc_open_confirm(data); |
| if (status != 0) |
| return status; |
| } |
| if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
| nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label); |
| return 0; |
| } |
| |
| static int nfs4_recover_expired_lease(struct nfs_server *server) |
| { |
| return nfs4_client_recover_expired_lease(server->nfs_client); |
| } |
| |
| /* |
| * OPEN_EXPIRED: |
| * reclaim state on the server after a network partition. |
| * Assumes caller holds the appropriate lock |
| */ |
| static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
| { |
| struct nfs4_opendata *opendata; |
| int ret; |
| |
| opendata = nfs4_open_recoverdata_alloc(ctx, state, |
| NFS4_OPEN_CLAIM_FH); |
| if (IS_ERR(opendata)) |
| return PTR_ERR(opendata); |
| ret = nfs4_open_recover(opendata, state); |
| if (ret == -ESTALE) |
| d_drop(ctx->dentry); |
| nfs4_opendata_put(opendata); |
| return ret; |
| } |
| |
| static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = _nfs4_open_expired(ctx, state); |
| trace_nfs4_open_expired(ctx, 0, err); |
| if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) |
| continue; |
| switch (err) { |
| default: |
| goto out; |
| case -NFS4ERR_GRACE: |
| case -NFS4ERR_DELAY: |
| nfs4_handle_exception(server, err, &exception); |
| err = 0; |
| } |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| { |
| struct nfs_open_context *ctx; |
| int ret; |
| |
| ctx = nfs4_state_find_open_context(state); |
| if (IS_ERR(ctx)) |
| return -EAGAIN; |
| ret = nfs4_do_open_expired(ctx, state); |
| put_nfs_open_context(ctx); |
| return ret; |
| } |
| |
| static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state) |
| { |
| nfs_remove_bad_delegation(state->inode); |
| write_seqlock(&state->seqlock); |
| nfs4_stateid_copy(&state->stateid, &state->open_stateid); |
| write_sequnlock(&state->seqlock); |
| clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| } |
| |
| static void nfs40_clear_delegation_stateid(struct nfs4_state *state) |
| { |
| if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) |
| nfs_finish_clear_delegation_stateid(state); |
| } |
| |
| static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| { |
| /* NFSv4.0 doesn't allow for delegation recovery on open expire */ |
| nfs40_clear_delegation_stateid(state); |
| return nfs4_open_expired(sp, state); |
| } |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static void nfs41_check_delegation_stateid(struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| nfs4_stateid stateid; |
| struct nfs_delegation *delegation; |
| struct rpc_cred *cred; |
| int status; |
| |
| /* Get the delegation credential for use by test/free_stateid */ |
| rcu_read_lock(); |
| delegation = rcu_dereference(NFS_I(state->inode)->delegation); |
| if (delegation == NULL) { |
| rcu_read_unlock(); |
| return; |
| } |
| |
| nfs4_stateid_copy(&stateid, &delegation->stateid); |
| cred = get_rpccred(delegation->cred); |
| rcu_read_unlock(); |
| status = nfs41_test_stateid(server, &stateid, cred); |
| trace_nfs4_test_delegation_stateid(state, NULL, status); |
| |
| if (status != NFS_OK) { |
| /* Free the stateid unless the server explicitly |
| * informs us the stateid is unrecognized. */ |
| if (status != -NFS4ERR_BAD_STATEID) |
| nfs41_free_stateid(server, &stateid, cred); |
| nfs_finish_clear_delegation_stateid(state); |
| } |
| |
| put_rpccred(cred); |
| } |
| |
| /** |
| * nfs41_check_open_stateid - possibly free an open stateid |
| * |
| * @state: NFSv4 state for an inode |
| * |
| * Returns NFS_OK if recovery for this stateid is now finished. |
| * Otherwise a negative NFS4ERR value is returned. |
| */ |
| static int nfs41_check_open_stateid(struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| nfs4_stateid *stateid = &state->open_stateid; |
| struct rpc_cred *cred = state->owner->so_cred; |
| int status; |
| |
| /* If a state reset has been done, test_stateid is unneeded */ |
| if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) && |
| (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) && |
| (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0)) |
| return -NFS4ERR_BAD_STATEID; |
| |
| status = nfs41_test_stateid(server, stateid, cred); |
| trace_nfs4_test_open_stateid(state, NULL, status); |
| if (status != NFS_OK) { |
| /* Free the stateid unless the server explicitly |
| * informs us the stateid is unrecognized. */ |
| if (status != -NFS4ERR_BAD_STATEID) |
| nfs41_free_stateid(server, stateid, cred); |
| |
| clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| clear_bit(NFS_OPEN_STATE, &state->flags); |
| } |
| return status; |
| } |
| |
| static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| { |
| int status; |
| |
| nfs41_check_delegation_stateid(state); |
| status = nfs41_check_open_stateid(state); |
| if (status != NFS_OK) |
| status = nfs4_open_expired(sp, state); |
| return status; |
| } |
| #endif |
| |
| /* |
| * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* |
| * fields corresponding to attributes that were used to store the verifier. |
| * Make sure we clobber those fields in the later setattr call |
| */ |
| static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, |
| struct iattr *sattr, struct nfs4_label **label) |
| { |
| const u32 *attrset = opendata->o_res.attrset; |
| |
| if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) && |
| !(sattr->ia_valid & ATTR_ATIME_SET)) |
| sattr->ia_valid |= ATTR_ATIME; |
| |
| if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) && |
| !(sattr->ia_valid & ATTR_MTIME_SET)) |
| sattr->ia_valid |= ATTR_MTIME; |
| |
| /* Except MODE, it seems harmless of setting twice. */ |
| if ((attrset[1] & FATTR4_WORD1_MODE)) |
| sattr->ia_valid &= ~ATTR_MODE; |
| |
| if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL) |
| *label = NULL; |
| } |
| |
| static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, |
| fmode_t fmode, |
| int flags, |
| struct nfs_open_context *ctx) |
| { |
| struct nfs4_state_owner *sp = opendata->owner; |
| struct nfs_server *server = sp->so_server; |
| struct dentry *dentry; |
| struct nfs4_state *state; |
| unsigned int seq; |
| int ret; |
| |
| seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); |
| |
| ret = _nfs4_proc_open(opendata); |
| if (ret != 0) |
| goto out; |
| |
| state = nfs4_opendata_to_nfs4_state(opendata); |
| ret = PTR_ERR(state); |
| if (IS_ERR(state)) |
| goto out; |
| if (server->caps & NFS_CAP_POSIX_LOCK) |
| set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); |
| |
| dentry = opendata->dentry; |
| if (d_really_is_negative(dentry)) { |
| /* FIXME: Is this d_drop() ever needed? */ |
| d_drop(dentry); |
| dentry = d_add_unique(dentry, igrab(state->inode)); |
| if (dentry == NULL) { |
| dentry = opendata->dentry; |
| } else if (dentry != ctx->dentry) { |
| dput(ctx->dentry); |
| ctx->dentry = dget(dentry); |
| } |
| nfs_set_verifier(dentry, |
| nfs_save_change_attribute(d_inode(opendata->dir))); |
| } |
| |
| ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); |
| if (ret != 0) |
| goto out; |
| |
| ctx->state = state; |
| if (d_inode(dentry) == state->inode) { |
| nfs_inode_attach_open_context(ctx); |
| if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) |
| nfs4_schedule_stateid_recovery(server, state); |
| } |
| out: |
| return ret; |
| } |
| |
| /* |
| * Returns a referenced nfs4_state |
| */ |
| static int _nfs4_do_open(struct inode *dir, |
| struct nfs_open_context *ctx, |
| int flags, |
| struct iattr *sattr, |
| struct nfs4_label *label, |
| int *opened) |
| { |
| struct nfs4_state_owner *sp; |
| struct nfs4_state *state = NULL; |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs4_opendata *opendata; |
| struct dentry *dentry = ctx->dentry; |
| struct rpc_cred *cred = ctx->cred; |
| struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; |
| fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); |
| enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; |
| struct nfs4_label *olabel = NULL; |
| int status; |
| |
| /* Protect against reboot recovery conflicts */ |
| status = -ENOMEM; |
| sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); |
| if (sp == NULL) { |
| dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); |
| goto out_err; |
| } |
| status = nfs4_recover_expired_lease(server); |
| if (status != 0) |
| goto err_put_state_owner; |
| if (d_really_is_positive(dentry)) |
| nfs4_return_incompatible_delegation(d_inode(dentry), fmode); |
| status = -ENOMEM; |
| if (d_really_is_positive(dentry)) |
| claim = NFS4_OPEN_CLAIM_FH; |
| opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, |
| label, claim, GFP_KERNEL); |
| if (opendata == NULL) |
| goto err_put_state_owner; |
| |
| if (label) { |
| olabel = nfs4_label_alloc(server, GFP_KERNEL); |
| if (IS_ERR(olabel)) { |
| status = PTR_ERR(olabel); |
| goto err_opendata_put; |
| } |
| } |
| |
| if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { |
| if (!opendata->f_attr.mdsthreshold) { |
| opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); |
| if (!opendata->f_attr.mdsthreshold) |
| goto err_free_label; |
| } |
| opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; |
| } |
| if (d_really_is_positive(dentry)) |
| opendata->state = nfs4_get_open_state(d_inode(dentry), sp); |
| |
| status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx); |
| if (status != 0) |
| goto err_free_label; |
| state = ctx->state; |
| |
| if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && |
| (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { |
| nfs4_exclusive_attrset(opendata, sattr, &label); |
| |
| nfs_fattr_init(opendata->o_res.f_attr); |
| status = nfs4_do_setattr(state->inode, cred, |
| opendata->o_res.f_attr, sattr, |
| state, label, olabel); |
| if (status == 0) { |
| nfs_setattr_update_inode(state->inode, sattr, |
| opendata->o_res.f_attr); |
| nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); |
| } |
| } |
| if (opened && opendata->file_created) |
| *opened |= FILE_CREATED; |
| |
| if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { |
| *ctx_th = opendata->f_attr.mdsthreshold; |
| opendata->f_attr.mdsthreshold = NULL; |
| } |
| |
| nfs4_label_free(olabel); |
| |
| nfs4_opendata_put(opendata); |
| nfs4_put_state_owner(sp); |
| return 0; |
| err_free_label: |
| nfs4_label_free(olabel); |
| err_opendata_put: |
| nfs4_opendata_put(opendata); |
| err_put_state_owner: |
| nfs4_put_state_owner(sp); |
| out_err: |
| return status; |
| } |
| |
| |
| static struct nfs4_state *nfs4_do_open(struct inode *dir, |
| struct nfs_open_context *ctx, |
| int flags, |
| struct iattr *sattr, |
| struct nfs4_label *label, |
| int *opened) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs4_exception exception = { }; |
| struct nfs4_state *res; |
| int status; |
| |
| do { |
| status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened); |
| res = ctx->state; |
| trace_nfs4_open_file(ctx, flags, status); |
| if (status == 0) |
| break; |
| /* NOTE: BAD_SEQID means the server and client disagree about the |
| * book-keeping w.r.t. state-changing operations |
| * (OPEN/CLOSE/LOCK/LOCKU...) |
| * It is actually a sign of a bug on the client or on the server. |
| * |
| * If we receive a BAD_SEQID error in the particular case of |
| * doing an OPEN, we assume that nfs_increment_open_seqid() will |
| * have unhashed the old state_owner for us, and that we can |
| * therefore safely retry using a new one. We should still warn |
| * the user though... |
| */ |
| if (status == -NFS4ERR_BAD_SEQID) { |
| pr_warn_ratelimited("NFS: v4 server %s " |
| " returned a bad sequence-id error!\n", |
| NFS_SERVER(dir)->nfs_client->cl_hostname); |
| exception.retry = 1; |
| continue; |
| } |
| /* |
| * BAD_STATEID on OPEN means that the server cancelled our |
| * state before it received the OPEN_CONFIRM. |
| * Recover by retrying the request as per the discussion |
| * on Page 181 of RFC3530. |
| */ |
| if (status == -NFS4ERR_BAD_STATEID) { |
| exception.retry = 1; |
| continue; |
| } |
| if (status == -EAGAIN) { |
| /* We must have found a delegation */ |
| exception.retry = 1; |
| continue; |
| } |
| if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) |
| continue; |
| res = ERR_PTR(nfs4_handle_exception(server, |
| status, &exception)); |
| } while (exception.retry); |
| return res; |
| } |
| |
| static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| struct nfs_fattr *fattr, struct iattr *sattr, |
| struct nfs4_state *state, struct nfs4_label *ilabel, |
| struct nfs4_label *olabel) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs_setattrargs arg = { |
| .fh = NFS_FH(inode), |
| .iap = sattr, |
| .server = server, |
| .bitmask = server->attr_bitmask, |
| .label = ilabel, |
| }; |
| struct nfs_setattrres res = { |
| .fattr = fattr, |
| .label = olabel, |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| unsigned long timestamp = jiffies; |
| fmode_t fmode; |
| bool truncate; |
| int status; |
| |
| arg.bitmask = nfs4_bitmask(server, ilabel); |
| if (ilabel) |
| arg.bitmask = nfs4_bitmask(server, olabel); |
| |
| nfs_fattr_init(fattr); |
| |
| /* Servers should only apply open mode checks for file size changes */ |
| truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false; |
| fmode = truncate ? FMODE_WRITE : FMODE_READ; |
| |
| if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) { |
| /* Use that stateid */ |
| } else if (truncate && state != NULL) { |
| struct nfs_lockowner lockowner = { |
| .l_owner = current->files, |
| .l_pid = current->tgid, |
| }; |
| if (!nfs4_valid_open_stateid(state)) |
| return -EBADF; |
| if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE, |
| &lockowner) == -EIO) |
| return -EBADF; |
| } else |
| nfs4_stateid_copy(&arg.stateid, &zero_stateid); |
| |
| status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| if (status == 0 && state != NULL) |
| renew_lease(server, timestamp); |
| return status; |
| } |
| |
| static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
| struct nfs_fattr *fattr, struct iattr *sattr, |
| struct nfs4_state *state, struct nfs4_label *ilabel, |
| struct nfs4_label *olabel) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_exception exception = { |
| .state = state, |
| .inode = inode, |
| }; |
| int err; |
| do { |
| err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel); |
| trace_nfs4_setattr(inode, err); |
| switch (err) { |
| case -NFS4ERR_OPENMODE: |
| if (!(sattr->ia_valid & ATTR_SIZE)) { |
| pr_warn_once("NFSv4: server %s is incorrectly " |
| "applying open mode checks to " |
| "a SETATTR that is not " |
| "changing file size.\n", |
| server->nfs_client->cl_hostname); |
| } |
| if (state && !(state->state & FMODE_WRITE)) { |
| err = -EBADF; |
| if (sattr->ia_valid & ATTR_OPEN) |
| err = -EACCES; |
| goto out; |
| } |
| } |
| err = nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| static bool |
| nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) |
| { |
| if (inode == NULL || !nfs_have_layout(inode)) |
| return false; |
| |
| return pnfs_wait_on_layoutreturn(inode, task); |
| } |
| |
| struct nfs4_closedata { |
| struct inode *inode; |
| struct nfs4_state *state; |
| struct nfs_closeargs arg; |
| struct nfs_closeres res; |
| struct nfs_fattr fattr; |
| unsigned long timestamp; |
| bool roc; |
| u32 roc_barrier; |
| }; |
| |
| static void nfs4_free_closedata(void *data) |
| { |
| struct nfs4_closedata *calldata = data; |
| struct nfs4_state_owner *sp = calldata->state->owner; |
| struct super_block *sb = calldata->state->inode->i_sb; |
| |
| if (calldata->roc) |
| pnfs_roc_release(calldata->state->inode); |
| nfs4_put_open_state(calldata->state); |
| nfs_free_seqid(calldata->arg.seqid); |
| nfs4_put_state_owner(sp); |
| nfs_sb_deactive(sb); |
| kfree(calldata); |
| } |
| |
| static void nfs4_close_done(struct rpc_task *task, void *data) |
| { |
| struct nfs4_closedata *calldata = data; |
| struct nfs4_state *state = calldata->state; |
| struct nfs_server *server = NFS_SERVER(calldata->inode); |
| nfs4_stateid *res_stateid = NULL; |
| |
| dprintk("%s: begin!\n", __func__); |
| if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
| return; |
| trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); |
| /* hmm. we are done with the inode, and in the process of freeing |
| * the state_owner. we keep this around to process errors |
| */ |
| switch (task->tk_status) { |
| case 0: |
| res_stateid = &calldata->res.stateid; |
| if (calldata->roc) |
| pnfs_roc_set_barrier(state->inode, |
| calldata->roc_barrier); |
| renew_lease(server, calldata->timestamp); |
| break; |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_OLD_STATEID: |
| case -NFS4ERR_BAD_STATEID: |
| case -NFS4ERR_EXPIRED: |
| if (!nfs4_stateid_match(&calldata->arg.stateid, |
| &state->open_stateid)) { |
| rpc_restart_call_prepare(task); |
| goto out_release; |
| } |
| if (calldata->arg.fmode == 0) |
| break; |
| default: |
| if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| goto out_release; |
| } |
| } |
| nfs_clear_open_stateid(state, &calldata->arg.stateid, |
| res_stateid, calldata->arg.fmode); |
| out_release: |
| nfs_release_seqid(calldata->arg.seqid); |
| nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
| dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); |
| } |
| |
| static void nfs4_close_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs4_closedata *calldata = data; |
| struct nfs4_state *state = calldata->state; |
| struct inode *inode = calldata->inode; |
| bool is_rdonly, is_wronly, is_rdwr; |
| int call_close = 0; |
| |
| dprintk("%s: begin!\n", __func__); |
| if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
| goto out_wait; |
| |
| task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
| spin_lock(&state->owner->so_lock); |
| is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); |
| is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid); |
| /* Calculate the change in open mode */ |
| calldata->arg.fmode = 0; |
| if (state->n_rdwr == 0) { |
| if (state->n_rdonly == 0) |
| call_close |= is_rdonly; |
| else if (is_rdonly) |
| calldata->arg.fmode |= FMODE_READ; |
| if (state->n_wronly == 0) |
| call_close |= is_wronly; |
| else if (is_wronly) |
| calldata->arg.fmode |= FMODE_WRITE; |
| } else if (is_rdwr) |
| calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; |
| |
| if (calldata->arg.fmode == 0) |
| call_close |= is_rdwr; |
| |
| if (!nfs4_valid_open_stateid(state)) |
| call_close = 0; |
| spin_unlock(&state->owner->so_lock); |
| |
| if (!call_close) { |
| /* Note: exit _without_ calling nfs4_close_done */ |
| goto out_no_action; |
| } |
| |
| if (nfs4_wait_on_layoutreturn(inode, task)) { |
| nfs_release_seqid(calldata->arg.seqid); |
| goto out_wait; |
| } |
| |
| if (calldata->arg.fmode == 0) |
| task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; |
| if (calldata->roc) |
| pnfs_roc_get_barrier(inode, &calldata->roc_barrier); |
| |
| calldata->arg.share_access = |
| nfs4_map_atomic_open_share(NFS_SERVER(inode), |
| calldata->arg.fmode, 0); |
| |
| nfs_fattr_init(calldata->res.fattr); |
| calldata->timestamp = jiffies; |
| if (nfs4_setup_sequence(NFS_SERVER(inode), |
| &calldata->arg.seq_args, |
| &calldata->res.seq_res, |
| task) != 0) |
| nfs_release_seqid(calldata->arg.seqid); |
| dprintk("%s: done!\n", __func__); |
| return; |
| out_no_action: |
| task->tk_action = NULL; |
| out_wait: |
| nfs4_sequence_done(task, &calldata->res.seq_res); |
| } |
| |
| static const struct rpc_call_ops nfs4_close_ops = { |
| .rpc_call_prepare = nfs4_close_prepare, |
| .rpc_call_done = nfs4_close_done, |
| .rpc_release = nfs4_free_closedata, |
| }; |
| |
| static bool nfs4_roc(struct inode *inode) |
| { |
| if (!nfs_have_layout(inode)) |
| return false; |
| return pnfs_roc(inode); |
| } |
| |
| /* |
| * It is possible for data to be read/written from a mem-mapped file |
| * after the sys_close call (which hits the vfs layer as a flush). |
| * This means that we can't safely call nfsv4 close on a file until |
| * the inode is cleared. This in turn means that we are not good |
| * NFSv4 citizens - we do not indicate to the server to update the file's |
| * share state even when we are done with one of the three share |
| * stateid's in the inode. |
| * |
| * NOTE: Caller must be holding the sp->so_owner semaphore! |
| */ |
| int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); |
| struct nfs4_closedata *calldata; |
| struct nfs4_state_owner *sp = state->owner; |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], |
| .rpc_cred = state->owner->so_cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_close_ops, |
| .workqueue = nfsiod_workqueue, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int status = -ENOMEM; |
| |
| nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, |
| &task_setup_data.rpc_client, &msg); |
| |
| calldata = kzalloc(sizeof(*calldata), gfp_mask); |
| if (calldata == NULL) |
| goto out; |
| nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); |
| calldata->inode = state->inode; |
| calldata->state = state; |
| calldata->arg.fh = NFS_FH(state->inode); |
| /* Serialization for the sequence id */ |
| alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; |
| calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); |
| if (IS_ERR(calldata->arg.seqid)) |
| goto out_free_calldata; |
| calldata->arg.fmode = 0; |
| calldata->arg.bitmask = server->cache_consistency_bitmask; |
| calldata->res.fattr = &calldata->fattr; |
| calldata->res.seqid = calldata->arg.seqid; |
| calldata->res.server = server; |
| calldata->roc = nfs4_roc(state->inode); |
| nfs_sb_active(calldata->inode->i_sb); |
| |
| msg.rpc_argp = &calldata->arg; |
| msg.rpc_resp = &calldata->res; |
| task_setup_data.callback_data = calldata; |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| status = 0; |
| if (wait) |
| status = rpc_wait_for_completion_task(task); |
| rpc_put_task(task); |
| return status; |
| out_free_calldata: |
| kfree(calldata); |
| out: |
| nfs4_put_open_state(state); |
| nfs4_put_state_owner(sp); |
| return status; |
| } |
| |
| static struct inode * |
| nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, |
| int open_flags, struct iattr *attr, int *opened) |
| { |
| struct nfs4_state *state; |
| struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; |
| |
| label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); |
| |
| /* Protect against concurrent sillydeletes */ |
| state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); |
| |
| nfs4_label_release_security(label); |
| |
| if (IS_ERR(state)) |
| return ERR_CAST(state); |
| return state->inode; |
| } |
| |
| static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
| { |
| if (ctx->state == NULL) |
| return; |
| if (is_sync) |
| nfs4_close_sync(ctx->state, ctx->mode); |
| else |
| nfs4_close_state(ctx->state, ctx->mode); |
| } |
| |
| #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) |
| #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) |
| #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL) |
| |
| static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| { |
| u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; |
| struct nfs4_server_caps_arg args = { |
| .fhandle = fhandle, |
| .bitmask = bitmask, |
| }; |
| struct nfs4_server_caps_res res = {}; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | |
| FATTR4_WORD0_FH_EXPIRE_TYPE | |
| FATTR4_WORD0_LINK_SUPPORT | |
| FATTR4_WORD0_SYMLINK_SUPPORT | |
| FATTR4_WORD0_ACLSUPPORT; |
| if (minorversion) |
| bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; |
| |
| status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| if (status == 0) { |
| /* Sanity check the server answers */ |
| switch (minorversion) { |
| case 0: |
| res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; |
| res.attr_bitmask[2] = 0; |
| break; |
| case 1: |
| res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; |
| break; |
| case 2: |
| res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; |
| } |
| memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); |
| server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| |
| NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
| NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| |
| NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| |
| NFS_CAP_CTIME|NFS_CAP_MTIME| |
| NFS_CAP_SECURITY_LABEL); |
| if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && |
| res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) |
| server->caps |= NFS_CAP_ACLS; |
| if (res.has_links != 0) |
| server->caps |= NFS_CAP_HARDLINKS; |
| if (res.has_symlinks != 0) |
| server->caps |= NFS_CAP_SYMLINKS; |
| if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) |
| server->caps |= NFS_CAP_FILEID; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) |
| server->caps |= NFS_CAP_MODE; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) |
| server->caps |= NFS_CAP_NLINK; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) |
| server->caps |= NFS_CAP_OWNER; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) |
| server->caps |= NFS_CAP_OWNER_GROUP; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) |
| server->caps |= NFS_CAP_ATIME; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) |
| server->caps |= NFS_CAP_CTIME; |
| if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) |
| server->caps |= NFS_CAP_MTIME; |
| #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
| if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) |
| server->caps |= NFS_CAP_SECURITY_LABEL; |
| #endif |
| memcpy(server->attr_bitmask_nl, res.attr_bitmask, |
| sizeof(server->attr_bitmask)); |
| server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; |
| |
| memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
| server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; |
| server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; |
| server->cache_consistency_bitmask[2] = 0; |
| memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, |
| sizeof(server->exclcreat_bitmask)); |
| server->acl_bitmask = res.acl_bitmask; |
| server->fh_expire_type = res.fh_expire_type; |
| } |
| |
| return status; |
| } |
| |
| int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_server_capabilities(server, fhandle), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| u32 bitmask[3]; |
| struct nfs4_lookup_root_arg args = { |
| .bitmask = bitmask, |
| }; |
| struct nfs4_lookup_res res = { |
| .server = server, |
| .fattr = info->fattr, |
| .fh = fhandle, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| bitmask[0] = nfs4_fattr_bitmap[0]; |
| bitmask[1] = nfs4_fattr_bitmap[1]; |
| /* |
| * Process the label in the upcoming getfattr |
| */ |
| bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; |
| |
| nfs_fattr_init(info->fattr); |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_lookup_root(server, fhandle, info); |
| trace_nfs4_lookup_root(server, fhandle, info->fattr, err); |
| switch (err) { |
| case 0: |
| case -NFS4ERR_WRONGSEC: |
| goto out; |
| default: |
| err = nfs4_handle_exception(server, err, &exception); |
| } |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info, rpc_authflavor_t flavor) |
| { |
| struct rpc_auth_create_args auth_args = { |
| .pseudoflavor = flavor, |
| }; |
| struct rpc_auth *auth; |
| int ret; |
| |
| auth = rpcauth_create(&auth_args, server->client); |
| if (IS_ERR(auth)) { |
| ret = -EACCES; |
| goto out; |
| } |
| ret = nfs4_lookup_root(server, fhandle, info); |
| out: |
| return ret; |
| } |
| |
| /* |
| * Retry pseudoroot lookup with various security flavors. We do this when: |
| * |
| * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC |
| * NFSv4.1: the server does not support the SECINFO_NO_NAME operation |
| * |
| * Returns zero on success, or a negative NFS4ERR value, or a |
| * negative errno value. |
| */ |
| static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| /* Per 3530bis 15.33.5 */ |
| static const rpc_authflavor_t flav_array[] = { |
| RPC_AUTH_GSS_KRB5P, |
| RPC_AUTH_GSS_KRB5I, |
| RPC_AUTH_GSS_KRB5, |
| RPC_AUTH_UNIX, /* courtesy */ |
| RPC_AUTH_NULL, |
| }; |
| int status = -EPERM; |
| size_t i; |
| |
| if (server->auth_info.flavor_len > 0) { |
| /* try each flavor specified by user */ |
| for (i = 0; i < server->auth_info.flavor_len; i++) { |
| status = nfs4_lookup_root_sec(server, fhandle, info, |
| server->auth_info.flavors[i]); |
| if (status == -NFS4ERR_WRONGSEC || status == -EACCES) |
| continue; |
| break; |
| } |
| } else { |
| /* no flavors specified by user, try default list */ |
| for (i = 0; i < ARRAY_SIZE(flav_array); i++) { |
| status = nfs4_lookup_root_sec(server, fhandle, info, |
| flav_array[i]); |
| if (status == -NFS4ERR_WRONGSEC || status == -EACCES) |
| continue; |
| break; |
| } |
| } |
| |
| /* |
| * -EACCESS could mean that the user doesn't have correct permissions |
| * to access the mount. It could also mean that we tried to mount |
| * with a gss auth flavor, but rpc.gssd isn't running. Either way, |
| * existing mount programs don't handle -EACCES very well so it should |
| * be mapped to -EPERM instead. |
| */ |
| if (status == -EACCES) |
| status = -EPERM; |
| return status; |
| } |
| |
| static int nfs4_do_find_root_sec(struct nfs_server *server, |
| struct nfs_fh *fhandle, struct nfs_fsinfo *info) |
| { |
| int mv = server->nfs_client->cl_minorversion; |
| return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info); |
| } |
| |
| /** |
| * nfs4_proc_get_rootfh - get file handle for server's pseudoroot |
| * @server: initialized nfs_server handle |
| * @fhandle: we fill in the pseudo-fs root file handle |
| * @info: we fill in an FSINFO struct |
| * @auth_probe: probe the auth flavours |
| * |
| * Returns zero on success, or a negative errno. |
| */ |
| int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info, |
| bool auth_probe) |
| { |
| int status = 0; |
| |
| if (!auth_probe) |
| status = nfs4_lookup_root(server, fhandle, info); |
| |
| if (auth_probe || status == NFS4ERR_WRONGSEC) |
| status = nfs4_do_find_root_sec(server, fhandle, info); |
| |
| if (status == 0) |
| status = nfs4_server_capabilities(server, fhandle); |
| if (status == 0) |
| status = nfs4_do_fsinfo(server, fhandle, info); |
| |
| return nfs4_map_errors(status); |
| } |
| |
| static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, |
| struct nfs_fsinfo *info) |
| { |
| int error; |
| struct nfs_fattr *fattr = info->fattr; |
| struct nfs4_label *label = NULL; |
| |
| error = nfs4_server_capabilities(server, mntfh); |
| if (error < 0) { |
| dprintk("nfs4_get_root: getcaps error = %d\n", -error); |
| return error; |
| } |
| |
| label = nfs4_label_alloc(server, GFP_KERNEL); |
| if (IS_ERR(label)) |
| return PTR_ERR(label); |
| |
| error = nfs4_proc_getattr(server, mntfh, fattr, label); |
| if (error < 0) { |
| dprintk("nfs4_get_root: getattr error = %d\n", -error); |
| goto err_free_label; |
| } |
| |
| if (fattr->valid & NFS_ATTR_FATTR_FSID && |
| !nfs_fsid_equal(&server->fsid, &fattr->fsid)) |
| memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
| |
| err_free_label: |
| nfs4_label_free(label); |
| |
| return error; |
| } |
| |
| /* |
| * Get locations and (maybe) other attributes of a referral. |
| * Note that we'll actually follow the referral later when |
| * we detect fsid mismatch in inode revalidation |
| */ |
| static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, |
| const struct qstr *name, struct nfs_fattr *fattr, |
| struct nfs_fh *fhandle) |
| { |
| int status = -ENOMEM; |
| struct page *page = NULL; |
| struct nfs4_fs_locations *locations = NULL; |
| |
| page = alloc_page(GFP_KERNEL); |
| if (page == NULL) |
| goto out; |
| locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); |
| if (locations == NULL) |
| goto out; |
| |
| status = nfs4_proc_fs_locations(client, dir, name, locations, page); |
| if (status != 0) |
| goto out; |
| |
| /* |
| * If the fsid didn't change, this is a migration event, not a |
| * referral. Cause us to drop into the exception handler, which |
| * will kick off migration recovery. |
| */ |
| if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { |
| dprintk("%s: server did not return a different fsid for" |
| " a referral at %s\n", __func__, name->name); |
| status = -NFS4ERR_MOVED; |
| goto out; |
| } |
| /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ |
| nfs_fixup_referral_attributes(&locations->fattr); |
| |
| /* replace the lookup nfs_fattr with the locations nfs_fattr */ |
| memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); |
| memset(fhandle, 0, sizeof(struct nfs_fh)); |
| out: |
| if (page) |
| __free_page(page); |
| kfree(locations); |
| return status; |
| } |
| |
| static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr, struct nfs4_label *label) |
| { |
| struct nfs4_getattr_arg args = { |
| .fh = fhandle, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_getattr_res res = { |
| .fattr = fattr, |
| .label = label, |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| args.bitmask = nfs4_bitmask(server, label); |
| |
| nfs_fattr_init(fattr); |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr, struct nfs4_label *label) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_proc_getattr(server, fhandle, fattr, label); |
| trace_nfs4_getattr(server, fhandle, fattr, err); |
| err = nfs4_handle_exception(server, err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| /* |
| * The file is not closed if it is opened due to the a request to change |
| * the size of the file. The open call will not be needed once the |
| * VFS layer lookup-intents are implemented. |
| * |
| * Close is called when the inode is destroyed. |
| * If we haven't opened the file for O_WRONLY, we |
| * need to in the size_change case to obtain a stateid. |
| * |
| * Got race? |
| * Because OPEN is always done by name in nfsv4, it is |
| * possible that we opened a different file by the same |
| * name. We can recognize this race condition, but we |
| * can't do anything about it besides returning an error. |
| * |
| * This will be fixed with VFS changes (lookup-intent). |
| */ |
| static int |
| nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| struct iattr *sattr) |
| { |
| struct inode *inode = d_inode(dentry); |
| struct rpc_cred *cred = NULL; |
| struct nfs4_state *state = NULL; |
| struct nfs4_label *label = NULL; |
| int status; |
| |
| if (pnfs_ld_layoutret_on_setattr(inode) && |
| sattr->ia_valid & ATTR_SIZE && |
| sattr->ia_size < i_size_read(inode)) |
| pnfs_commit_and_return_layout(inode); |
| |
| nfs_fattr_init(fattr); |
| |
| /* Deal with open(O_TRUNC) */ |
| if (sattr->ia_valid & ATTR_OPEN) |
| sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); |
| |
| /* Optimization: if the end result is no change, don't RPC */ |
| if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
| return 0; |
| |
| /* Search for an existing open(O_WRITE) file */ |
| if (sattr->ia_valid & ATTR_FILE) { |
| struct nfs_open_context *ctx; |
| |
| ctx = nfs_file_open_context(sattr->ia_file); |
| if (ctx) { |
| cred = ctx->cred; |
| state = ctx->state; |
| } |
| } |
| |
| label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); |
| if (IS_ERR(label)) |
| return PTR_ERR(label); |
| |
| status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label); |
| if (status == 0) { |
| nfs_setattr_update_inode(inode, sattr, fattr); |
| nfs_setsecurity(inode, fattr, label); |
| } |
| nfs4_label_free(label); |
| return status; |
| } |
| |
| static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, |
| const struct qstr *name, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr, struct nfs4_label *label) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| int status; |
| struct nfs4_lookup_arg args = { |
| .bitmask = server->attr_bitmask, |
| .dir_fh = NFS_FH(dir), |
| .name = name, |
| }; |
| struct nfs4_lookup_res res = { |
| .server = server, |
| .fattr = fattr, |
| .label = label, |
| .fh = fhandle, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| args.bitmask = nfs4_bitmask(server, label); |
| |
| nfs_fattr_init(fattr); |
| |
| dprintk("NFS call lookup %s\n", name->name); |
| status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); |
| dprintk("NFS reply lookup: %d\n", status); |
| return status; |
| } |
| |
| static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) |
| { |
| fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | |
| NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; |
| fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| fattr->nlink = 2; |
| } |
| |
| static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, |
| struct qstr *name, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr, struct nfs4_label *label) |
| { |
| struct nfs4_exception exception = { }; |
| struct rpc_clnt *client = *clnt; |
| int err; |
| do { |
| err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); |
| trace_nfs4_lookup(dir, name, err); |
| switch (err) { |
| case -NFS4ERR_BADNAME: |
| err = -ENOENT; |
| goto out; |
| case -NFS4ERR_MOVED: |
| err = nfs4_get_referral(client, dir, name, fattr, fhandle); |
| if (err == -NFS4ERR_MOVED) |
| err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); |
| goto out; |
| case -NFS4ERR_WRONGSEC: |
| err = -EPERM; |
| if (client != *clnt) |
| goto out; |
| client = nfs4_negotiate_security(client, dir, name); |
| if (IS_ERR(client)) |
| return PTR_ERR(client); |
| |
| exception.retry = 1; |
| break; |
| default: |
| err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); |
| } |
| } while (exception.retry); |
| |
| out: |
| if (err == 0) |
| *clnt = client; |
| else if (client != *clnt) |
| rpc_shutdown_client(client); |
| |
| return err; |
| } |
| |
| static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, |
| struct nfs_fh *fhandle, struct nfs_fattr *fattr, |
| struct nfs4_label *label) |
| { |
| int status; |
| struct rpc_clnt *client = NFS_CLIENT(dir); |
| |
| status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); |
| if (client != NFS_CLIENT(dir)) { |
| rpc_shutdown_client(client); |
| nfs_fixup_secinfo_attributes(fattr); |
| } |
| return status; |
| } |
| |
| struct rpc_clnt * |
| nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name, |
| struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| { |
| struct rpc_clnt *client = NFS_CLIENT(dir); |
| int status; |
| |
| status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); |
| if (status < 0) |
| return ERR_PTR(status); |
| return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; |
| } |
| |
| static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_accessargs args = { |
| .fh = NFS_FH(inode), |
| .bitmask = server->cache_consistency_bitmask, |
| }; |
| struct nfs4_accessres res = { |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = entry->cred, |
| }; |
| int mode = entry->mask; |
| int status = 0; |
| |
| /* |
| * Determine which access bits we want to ask for... |
| */ |
| if (mode & MAY_READ) |
| args.access |= NFS4_ACCESS_READ; |
| if (S_ISDIR(inode->i_mode)) { |
| if (mode & MAY_WRITE) |
| args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; |
| if (mode & MAY_EXEC) |
| args.access |= NFS4_ACCESS_LOOKUP; |
| } else { |
| if (mode & MAY_WRITE) |
| args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; |
| if (mode & MAY_EXEC) |
| args.access |= NFS4_ACCESS_EXECUTE; |
| } |
| |
| res.fattr = nfs_alloc_fattr(); |
| if (res.fattr == NULL) |
| return -ENOMEM; |
| |
| status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| if (!status) { |
| nfs_access_set_mask(entry, res.access); |
| nfs_refresh_inode(inode, res.fattr); |
| } |
| nfs_free_fattr(res.fattr); |
| return status; |
| } |
| |
| static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_proc_access(inode, entry); |
| trace_nfs4_access(inode, err); |
| err = nfs4_handle_exception(NFS_SERVER(inode), err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| /* |
| * TODO: For the time being, we don't try to get any attributes |
| * along with any of the zero-copy operations READ, READDIR, |
| * READLINK, WRITE. |
| * |
| * In the case of the first three, we want to put the GETATTR |
| * after the read-type operation -- this is because it is hard |
| * to predict the length of a GETATTR response in v4, and thus |
| * align the READ data correctly. This means that the GETATTR |
| * may end up partially falling into the page cache, and we should |
| * shift it into the 'tail' of the xdr_buf before processing. |
| * To do this efficiently, we need to know the total length |
| * of data received, which doesn't seem to be available outside |
| * of the RPC layer. |
| * |
| * In the case of WRITE, we also want to put the GETATTR after |
| * the operation -- in this case because we want to make sure |
| * we get the post-operation mtime and size. |
| * |
| * Both of these changes to the XDR layer would in fact be quite |
| * minor, but I decided to leave them for a subsequent patch. |
| */ |
| static int _nfs4_proc_readlink(struct inode *inode, struct page *page, |
| unsigned int pgbase, unsigned int pglen) |
| { |
| struct nfs4_readlink args = { |
| .fh = NFS_FH(inode), |
| .pgbase = pgbase, |
| .pglen = pglen, |
| .pages = &page, |
| }; |
| struct nfs4_readlink_res res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_proc_readlink(struct inode *inode, struct page *page, |
| unsigned int pgbase, unsigned int pglen) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_proc_readlink(inode, page, pgbase, pglen); |
| trace_nfs4_readlink(inode, err); |
| err = nfs4_handle_exception(NFS_SERVER(inode), err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| /* |
| * This is just for mknod. open(O_CREAT) will always do ->open_context(). |
| */ |
| static int |
| nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| int flags) |
| { |
| struct nfs4_label l, *ilabel = NULL; |
| struct nfs_open_context *ctx; |
| struct nfs4_state *state; |
| int status = 0; |
| |
| ctx = alloc_nfs_open_context(dentry, FMODE_READ); |
| if (IS_ERR(ctx)) |
| return PTR_ERR(ctx); |
| |
| ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); |
| |
| sattr->ia_mode &= ~current_umask(); |
| state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); |
| if (IS_ERR(state)) { |
| status = PTR_ERR(state); |
| goto out; |
| } |
| out: |
| nfs4_label_release_security(ilabel); |
| put_nfs_open_context(ctx); |
| return status; |
| } |
| |
| static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_removeargs args = { |
| .fh = NFS_FH(dir), |
| .name = *name, |
| }; |
| struct nfs_removeres res = { |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); |
| if (status == 0) |
| update_changeattr(dir, &res.cinfo); |
| return status; |
| } |
| |
| static int nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_proc_remove(dir, name); |
| trace_nfs4_remove(dir, name, err); |
| err = nfs4_handle_exception(NFS_SERVER(dir), err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_removeargs *args = msg->rpc_argp; |
| struct nfs_removeres *res = msg->rpc_resp; |
| |
| res->server = server; |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
| nfs4_init_sequence(&args->seq_args, &res->seq_res, 1); |
| |
| nfs_fattr_init(res->dir_attr); |
| } |
| |
| static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) |
| { |
| nfs4_setup_sequence(NFS_SERVER(data->dir), |
| &data->args.seq_args, |
| &data->res.seq_res, |
| task); |
| } |
| |
| static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
| { |
| struct nfs_unlinkdata *data = task->tk_calldata; |
| struct nfs_removeres *res = &data->res; |
| |
| if (!nfs4_sequence_done(task, &res->seq_res)) |
| return 0; |
| if (nfs4_async_handle_error(task, res->server, NULL, |
| &data->timeout) == -EAGAIN) |
| return 0; |
| update_changeattr(dir, &res->cinfo); |
| return 1; |
| } |
| |
| static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_renameargs *arg = msg->rpc_argp; |
| struct nfs_renameres *res = msg->rpc_resp; |
| |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; |
| res->server = server; |
| nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1); |
| } |
| |
| static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) |
| { |
| nfs4_setup_sequence(NFS_SERVER(data->old_dir), |
| &data->args.seq_args, |
| &data->res.seq_res, |
| task); |
| } |
| |
| static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, |
| struct inode *new_dir) |
| { |
| struct nfs_renamedata *data = task->tk_calldata; |
| struct nfs_renameres *res = &data->res; |
| |
| if (!nfs4_sequence_done(task, &res->seq_res)) |
| return 0; |
| if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) |
| return 0; |
| |
| update_changeattr(old_dir, &res->old_cinfo); |
| update_changeattr(new_dir, &res->new_cinfo); |
| return 1; |
| } |
| |
| static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_link_arg arg = { |
| .fh = NFS_FH(inode), |
| .dir_fh = NFS_FH(dir), |
| .name = name, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_link_res res = { |
| .server = server, |
| .label = NULL, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status = -ENOMEM; |
| |
| res.fattr = nfs_alloc_fattr(); |
| if (res.fattr == NULL) |
| goto out; |
| |
| res.label = nfs4_label_alloc(server, GFP_KERNEL); |
| if (IS_ERR(res.label)) { |
| status = PTR_ERR(res.label); |
| goto out; |
| } |
| arg.bitmask = nfs4_bitmask(server, res.label); |
| |
| status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| if (!status) { |
| update_changeattr(dir, &res.cinfo); |
| status = nfs_post_op_update_inode(inode, res.fattr); |
| if (!status) |
| nfs_setsecurity(inode, res.fattr, res.label); |
| } |
| |
| |
| nfs4_label_free(res.label); |
| |
| out: |
| nfs_free_fattr(res.fattr); |
| return status; |
| } |
| |
| static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(inode), |
| _nfs4_proc_link(inode, dir, name), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| struct nfs4_createdata { |
| struct rpc_message msg; |
| struct nfs4_create_arg arg; |
| struct nfs4_create_res res; |
| struct nfs_fh fh; |
| struct nfs_fattr fattr; |
| struct nfs4_label *label; |
| }; |
| |
| static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, |
| struct qstr *name, struct iattr *sattr, u32 ftype) |
| { |
| struct nfs4_createdata *data; |
| |
| data = kzalloc(sizeof(*data), GFP_KERNEL); |
| if (data != NULL) { |
| struct nfs_server *server = NFS_SERVER(dir); |
| |
| data->label = nfs4_label_alloc(server, GFP_KERNEL); |
| if (IS_ERR(data->label)) |
| goto out_free; |
| |
| data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; |
| data->msg.rpc_argp = &data->arg; |
| data->msg.rpc_resp = &data->res; |
| data->arg.dir_fh = NFS_FH(dir); |
| data->arg.server = server; |
| data->arg.name = name; |
| data->arg.attrs = sattr; |
| data->arg.ftype = ftype; |
| data->arg.bitmask = nfs4_bitmask(server, data->label); |
| data->res.server = server; |
| data->res.fh = &data->fh; |
| data->res.fattr = &data->fattr; |
| data->res.label = data->label; |
| nfs_fattr_init(data->res.fattr); |
| } |
| return data; |
| out_free: |
| kfree(data); |
| return NULL; |
| } |
| |
| static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) |
| { |
| int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, |
| &data->arg.seq_args, &data->res.seq_res, 1); |
| if (status == 0) { |
| update_changeattr(dir, &data->res.dir_cinfo); |
| status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); |
| } |
| return status; |
| } |
| |
| static void nfs4_free_createdata(struct nfs4_createdata *data) |
| { |
| nfs4_label_free(data->label); |
| kfree(data); |
| } |
| |
| static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
| struct page *page, unsigned int len, struct iattr *sattr, |
| struct nfs4_label *label) |
| { |
| struct nfs4_createdata *data; |
| int status = -ENAMETOOLONG; |
| |
| if (len > NFS4_MAXPATHLEN) |
| goto out; |
| |
| status = -ENOMEM; |
| data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); |
| if (data == NULL) |
| goto out; |
| |
| data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; |
| data->arg.u.symlink.pages = &page; |
| data->arg.u.symlink.len = len; |
| data->arg.label = label; |
| |
| status = nfs4_do_create(dir, dentry, data); |
| |
| nfs4_free_createdata(data); |
| out: |
| return status; |
| } |
| |
| static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
| struct page *page, unsigned int len, struct iattr *sattr) |
| { |
| struct nfs4_exception exception = { }; |
| struct nfs4_label l, *label = NULL; |
| int err; |
| |
| label = nfs4_label_init_security(dir, dentry, sattr, &l); |
| |
| do { |
| err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); |
| trace_nfs4_symlink(dir, &dentry->d_name, err); |
| err = nfs4_handle_exception(NFS_SERVER(dir), err, |
| &exception); |
| } while (exception.retry); |
| |
| nfs4_label_release_security(label); |
| return err; |
| } |
| |
| static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr, struct nfs4_label *label) |
| { |
| struct nfs4_createdata *data; |
| int status = -ENOMEM; |
| |
| data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
| if (data == NULL) |
| goto out; |
| |
| data->arg.label = label; |
| status = nfs4_do_create(dir, dentry, data); |
| |
| nfs4_free_createdata(data); |
| out: |
| return status; |
| } |
| |
| static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr) |
| { |
| struct nfs4_exception exception = { }; |
| struct nfs4_label l, *label = NULL; |
| int err; |
| |
| label = nfs4_label_init_security(dir, dentry, sattr, &l); |
| |
| sattr->ia_mode &= ~current_umask(); |
| do { |
| err = _nfs4_proc_mkdir(dir, dentry, sattr, label); |
| trace_nfs4_mkdir(dir, &dentry->d_name, err); |
| err = nfs4_handle_exception(NFS_SERVER(dir), err, |
| &exception); |
| } while (exception.retry); |
| nfs4_label_release_security(label); |
| |
| return err; |
| } |
| |
| static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| u64 cookie, struct page **pages, unsigned int count, int plus) |
| { |
| struct inode *dir = d_inode(dentry); |
| struct nfs4_readdir_arg args = { |
| .fh = NFS_FH(dir), |
| .pages = pages, |
| .pgbase = 0, |
| .count = count, |
| .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask, |
| .plus = plus, |
| }; |
| struct nfs4_readdir_res res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, |
| dentry, |
| (unsigned long long)cookie); |
| nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); |
| res.pgbase = args.pgbase; |
| status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); |
| if (status >= 0) { |
| memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); |
| status += args.pgbase; |
| } |
| |
| nfs_invalidate_atime(dir); |
| |
| dprintk("%s: returns %d\n", __func__, status); |
| return status; |
| } |
| |
| static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| u64 cookie, struct page **pages, unsigned int count, int plus) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_proc_readdir(dentry, cred, cookie, |
| pages, count, plus); |
| trace_nfs4_readdir(d_inode(dentry), err); |
| err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr, struct nfs4_label *label, dev_t rdev) |
| { |
| struct nfs4_createdata *data; |
| int mode = sattr->ia_mode; |
| int status = -ENOMEM; |
| |
| data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); |
| if (data == NULL) |
| goto out; |
| |
| if (S_ISFIFO(mode)) |
| data->arg.ftype = NF4FIFO; |
| else if (S_ISBLK(mode)) { |
| data->arg.ftype = NF4BLK; |
| data->arg.u.device.specdata1 = MAJOR(rdev); |
| data->arg.u.device.specdata2 = MINOR(rdev); |
| } |
| else if (S_ISCHR(mode)) { |
| data->arg.ftype = NF4CHR; |
| data->arg.u.device.specdata1 = MAJOR(rdev); |
| data->arg.u.device.specdata2 = MINOR(rdev); |
| } else if (!S_ISSOCK(mode)) { |
| status = -EINVAL; |
| goto out_free; |
| } |
| |
| data->arg.label = label; |
| status = nfs4_do_create(dir, dentry, data); |
| out_free: |
| nfs4_free_createdata(data); |
| out: |
| return status; |
| } |
| |
| static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr, dev_t rdev) |
| { |
| struct nfs4_exception exception = { }; |
| struct nfs4_label l, *label = NULL; |
| int err; |
| |
| label = nfs4_label_init_security(dir, dentry, sattr, &l); |
| |
| sattr->ia_mode &= ~current_umask(); |
| do { |
| err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); |
| trace_nfs4_mknod(dir, &dentry->d_name, err); |
| err = nfs4_handle_exception(NFS_SERVER(dir), err, |
| &exception); |
| } while (exception.retry); |
| |
| nfs4_label_release_security(label); |
| |
| return err; |
| } |
| |
| static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsstat *fsstat) |
| { |
| struct nfs4_statfs_arg args = { |
| .fh = fhandle, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_statfs_res res = { |
| .fsstat = fsstat, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| nfs_fattr_init(fsstat->fattr); |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_proc_statfs(server, fhandle, fsstat), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *fsinfo) |
| { |
| struct nfs4_fsinfo_arg args = { |
| .fh = fhandle, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_fsinfo_res res = { |
| .fsinfo = fsinfo, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| { |
| struct nfs4_exception exception = { }; |
| unsigned long now = jiffies; |
| int err; |
| |
| do { |
| err = _nfs4_do_fsinfo(server, fhandle, fsinfo); |
| trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); |
| if (err == 0) { |
| struct nfs_client *clp = server->nfs_client; |
| |
| spin_lock(&clp->cl_lock); |
| clp->cl_lease_time = fsinfo->lease_time * HZ; |
| clp->cl_last_renewal = now; |
| spin_unlock(&clp->cl_lock); |
| break; |
| } |
| err = nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| { |
| int error; |
| |
| nfs_fattr_init(fsinfo->fattr); |
| error = nfs4_do_fsinfo(server, fhandle, fsinfo); |
| if (error == 0) { |
| /* block layout checks this! */ |
| server->pnfs_blksize = fsinfo->blksize; |
| set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype); |
| } |
| |
| return error; |
| } |
| |
| static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_pathconf *pathconf) |
| { |
| struct nfs4_pathconf_arg args = { |
| .fh = fhandle, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_pathconf_res res = { |
| .pathconf = pathconf, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| /* None of the pathconf attributes are mandatory to implement */ |
| if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { |
| memset(pathconf, 0, sizeof(*pathconf)); |
| return 0; |
| } |
| |
| nfs_fattr_init(pathconf->fattr); |
| return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| } |
| |
| static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_pathconf *pathconf) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_proc_pathconf(server, fhandle, pathconf), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| int nfs4_set_rw_stateid(nfs4_stateid *stateid, |
| const struct nfs_open_context *ctx, |
| const struct nfs_lock_context *l_ctx, |
| fmode_t fmode) |
| { |
| const struct nfs_lockowner *lockowner = NULL; |
| |
| if (l_ctx != NULL) |
| lockowner = &l_ctx->lockowner; |
| return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner); |
| } |
| EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); |
| |
| static bool nfs4_stateid_is_current(nfs4_stateid *stateid, |
| const struct nfs_open_context *ctx, |
| const struct nfs_lock_context *l_ctx, |
| fmode_t fmode) |
| { |
| nfs4_stateid current_stateid; |
| |
| /* If the current stateid represents a lost lock, then exit */ |
| if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO) |
| return true; |
| return nfs4_stateid_match(stateid, ¤t_stateid); |
| } |
| |
| static bool nfs4_error_stateid_expired(int err) |
| { |
| switch (err) { |
| case -NFS4ERR_DELEG_REVOKED: |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_OLD_STATEID: |
| case -NFS4ERR_OPENMODE: |
| case -NFS4ERR_EXPIRED: |
| return true; |
| } |
| return false; |
| } |
| |
| void __nfs4_read_done_cb(struct nfs_pgio_header *hdr) |
| { |
| nfs_invalidate_atime(hdr->inode); |
| } |
| |
| static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) |
| { |
| struct nfs_server *server = NFS_SERVER(hdr->inode); |
| |
| trace_nfs4_read(hdr, task->tk_status); |
| if (nfs4_async_handle_error(task, server, |
| hdr->args.context->state, |
| NULL) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return -EAGAIN; |
| } |
| |
| __nfs4_read_done_cb(hdr); |
| if (task->tk_status > 0) |
| renew_lease(server, hdr->timestamp); |
| return 0; |
| } |
| |
| static bool nfs4_read_stateid_changed(struct rpc_task *task, |
| struct nfs_pgio_args *args) |
| { |
| |
| if (!nfs4_error_stateid_expired(task->tk_status) || |
| nfs4_stateid_is_current(&args->stateid, |
| args->context, |
| args->lock_context, |
| FMODE_READ)) |
| return false; |
| rpc_restart_call_prepare(task); |
| return true; |
| } |
| |
| static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) |
| { |
| |
| dprintk("--> %s\n", __func__); |
| |
| if (!nfs4_sequence_done(task, &hdr->res.seq_res)) |
| return -EAGAIN; |
| if (nfs4_read_stateid_changed(task, &hdr->args)) |
| return -EAGAIN; |
| return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : |
| nfs4_read_done_cb(task, hdr); |
| } |
| |
| static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, |
| struct rpc_message *msg) |
| { |
| hdr->timestamp = jiffies; |
| hdr->pgio_done_cb = nfs4_read_done_cb; |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
| nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0); |
| } |
| |
| static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, |
| struct nfs_pgio_header *hdr) |
| { |
| if (nfs4_setup_sequence(NFS_SERVER(hdr->inode), |
| &hdr->args.seq_args, |
| &hdr->res.seq_res, |
| task)) |
| return 0; |
| if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
| hdr->args.lock_context, |
| hdr->rw_ops->rw_mode) == -EIO) |
| return -EIO; |
| if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) |
| return -EIO; |
| return 0; |
| } |
| |
| static int nfs4_write_done_cb(struct rpc_task *task, |
| struct nfs_pgio_header *hdr) |
| { |
| struct inode *inode = hdr->inode; |
| |
| trace_nfs4_write(hdr, task->tk_status); |
| if (nfs4_async_handle_error(task, NFS_SERVER(inode), |
| hdr->args.context->state, |
| NULL) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return -EAGAIN; |
| } |
| if (task->tk_status >= 0) { |
| renew_lease(NFS_SERVER(inode), hdr->timestamp); |
| nfs_writeback_update_inode(hdr); |
| } |
| return 0; |
| } |
| |
| static bool nfs4_write_stateid_changed(struct rpc_task *task, |
| struct nfs_pgio_args *args) |
| { |
| |
| if (!nfs4_error_stateid_expired(task->tk_status) || |
| nfs4_stateid_is_current(&args->stateid, |
| args->context, |
| args->lock_context, |
| FMODE_WRITE)) |
| return false; |
| rpc_restart_call_prepare(task); |
| return true; |
| } |
| |
| static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) |
| { |
| if (!nfs4_sequence_done(task, &hdr->res.seq_res)) |
| return -EAGAIN; |
| if (nfs4_write_stateid_changed(task, &hdr->args)) |
| return -EAGAIN; |
| return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : |
| nfs4_write_done_cb(task, hdr); |
| } |
| |
| static |
| bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) |
| { |
| /* Don't request attributes for pNFS or O_DIRECT writes */ |
| if (hdr->ds_clp != NULL || hdr->dreq != NULL) |
| return false; |
| /* Otherwise, request attributes if and only if we don't hold |
| * a delegation |
| */ |
| return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; |
| } |
| |
| static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, |
| struct rpc_message *msg) |
| { |
| struct nfs_server *server = NFS_SERVER(hdr->inode); |
| |
| if (!nfs4_write_need_cache_consistency_data(hdr)) { |
| hdr->args.bitmask = NULL; |
| hdr->res.fattr = NULL; |
| } else |
| hdr->args.bitmask = server->cache_consistency_bitmask; |
| |
| if (!hdr->pgio_done_cb) |
| hdr->pgio_done_cb = nfs4_write_done_cb; |
| hdr->res.server = server; |
| hdr->timestamp = jiffies; |
| |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
| nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1); |
| } |
| |
| static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) |
| { |
| nfs4_setup_sequence(NFS_SERVER(data->inode), |
| &data->args.seq_args, |
| &data->res.seq_res, |
| task); |
| } |
| |
| static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) |
| { |
| struct inode *inode = data->inode; |
| |
| trace_nfs4_commit(data, task->tk_status); |
| if (nfs4_async_handle_error(task, NFS_SERVER(inode), |
| NULL, NULL) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return -EAGAIN; |
| } |
| return 0; |
| } |
| |
| static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) |
| { |
| if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| return -EAGAIN; |
| return data->commit_done_cb(task, data); |
| } |
| |
| static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) |
| { |
| struct nfs_server *server = NFS_SERVER(data->inode); |
| |
| if (data->commit_done_cb == NULL) |
| data->commit_done_cb = nfs4_commit_done_cb; |
| data->res.server = server; |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
| nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); |
| } |
| |
| struct nfs4_renewdata { |
| struct nfs_client *client; |
| unsigned long timestamp; |
| }; |
| |
| /* |
| * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special |
| * standalone procedure for queueing an asynchronous RENEW. |
| */ |
| static void nfs4_renew_release(void *calldata) |
| { |
| struct nfs4_renewdata *data = calldata; |
| struct nfs_client *clp = data->client; |
| |
| if (atomic_read(&clp->cl_count) > 1) |
| nfs4_schedule_state_renewal(clp); |
| nfs_put_client(clp); |
| kfree(data); |
| } |
| |
| static void nfs4_renew_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_renewdata *data = calldata; |
| struct nfs_client *clp = data->client; |
| unsigned long timestamp = data->timestamp; |
| |
| trace_nfs4_renew_async(clp, task->tk_status); |
| switch (task->tk_status) { |
| case 0: |
| break; |
| case -NFS4ERR_LEASE_MOVED: |
| nfs4_schedule_lease_moved_recovery(clp); |
| break; |
| default: |
| /* Unless we're shutting down, schedule state recovery! */ |
| if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) |
| return; |
| if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { |
| nfs4_schedule_lease_recovery(clp); |
| return; |
| } |
| nfs4_schedule_path_down_recovery(clp); |
| } |
| do_renew_lease(clp, timestamp); |
| } |
| |
| static const struct rpc_call_ops nfs4_renew_ops = { |
| .rpc_call_done = nfs4_renew_done, |
| .rpc_release = nfs4_renew_release, |
| }; |
| |
| static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| .rpc_argp = clp, |
| .rpc_cred = cred, |
| }; |
| struct nfs4_renewdata *data; |
| |
| if (renew_flags == 0) |
| return 0; |
| if (!atomic_inc_not_zero(&clp->cl_count)) |
| return -EIO; |
| data = kmalloc(sizeof(*data), GFP_NOFS); |
| if (data == NULL) |
| return -ENOMEM; |
| data->client = clp; |
| data->timestamp = jiffies; |
| return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, |
| &nfs4_renew_ops, data); |
| } |
| |
| static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| .rpc_argp = clp, |
| .rpc_cred = cred, |
| }; |
| unsigned long now = jiffies; |
| int status; |
| |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| if (status < 0) |
| return status; |
| do_renew_lease(clp, now); |
| return 0; |
| } |
| |
| static inline int nfs4_server_supports_acls(struct nfs_server *server) |
| { |
| return server->caps & NFS_CAP_ACLS; |
| } |
| |
| /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that |
| * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on |
| * the stack. |
| */ |
| #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) |
| |
| static int buf_to_pages_noslab(const void *buf, size_t buflen, |
| struct page **pages, unsigned int *pgbase) |
| { |
| struct page *newpage, **spages; |
| int rc = 0; |
| size_t len; |
| spages = pages; |
| |
| do { |
| len = min_t(size_t, PAGE_SIZE, buflen); |
| newpage = alloc_page(GFP_KERNEL); |
| |
| if (newpage == NULL) |
| goto unwind; |
| memcpy(page_address(newpage), buf, len); |
| buf += len; |
| buflen -= len; |
| *pages++ = newpage; |
| rc++; |
| } while (buflen != 0); |
| |
| return rc; |
| |
| unwind: |
| for(; rc > 0; rc--) |
| __free_page(spages[rc-1]); |
| return -ENOMEM; |
| } |
| |
| struct nfs4_cached_acl { |
| int cached; |
| size_t len; |
| char data[0]; |
| }; |
| |
| static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) |
| { |
| struct nfs_inode *nfsi = NFS_I(inode); |
| |
| spin_lock(&inode->i_lock); |
| kfree(nfsi->nfs4_acl); |
| nfsi->nfs4_acl = acl; |
| spin_unlock(&inode->i_lock); |
| } |
| |
| static void nfs4_zap_acl_attr(struct inode *inode) |
| { |
| nfs4_set_cached_acl(inode, NULL); |
| } |
| |
| static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) |
| { |
| struct nfs_inode *nfsi = NFS_I(inode); |
| struct nfs4_cached_acl *acl; |
| int ret = -ENOENT; |
| |
| spin_lock(&inode->i_lock); |
| acl = nfsi->nfs4_acl; |
| if (acl == NULL) |
| goto out; |
| if (buf == NULL) /* user is just asking for length */ |
| goto out_len; |
| if (acl->cached == 0) |
| goto out; |
| ret = -ERANGE; /* see getxattr(2) man page */ |
| if (acl->len > buflen) |
| goto out; |
| memcpy(buf, acl->data, acl->len); |
| out_len: |
| ret = acl->len; |
| out: |
| spin_unlock(&inode->i_lock); |
| return ret; |
| } |
| |
| static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) |
| { |
| struct nfs4_cached_acl *acl; |
| size_t buflen = sizeof(*acl) + acl_len; |
| |
| if (buflen <= PAGE_SIZE) { |
| acl = kmalloc(buflen, GFP_KERNEL); |
| if (acl == NULL) |
| goto out; |
| acl->cached = 1; |
| _copy_from_pages(acl->data, pages, pgbase, acl_len); |
| } else { |
| acl = kmalloc(sizeof(*acl), GFP_KERNEL); |
| if (acl == NULL) |
| goto out; |
| acl->cached = 0; |
| } |
| acl->len = acl_len; |
| out: |
| nfs4_set_cached_acl(inode, acl); |
| } |
| |
| /* |
| * The getxattr API returns the required buffer length when called with a |
| * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating |
| * the required buf. On a NULL buf, we send a page of data to the server |
| * guessing that the ACL request can be serviced by a page. If so, we cache |
| * up to the page of ACL data, and the 2nd call to getxattr is serviced by |
| * the cache. If not so, we throw away the page, and cache the required |
| * length. The next getxattr call will then produce another round trip to |
| * the server, this time with the input buf of the required size. |
| */ |
| static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| { |
| struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; |
| struct nfs_getaclargs args = { |
| .fh = NFS_FH(inode), |
| .acl_pages = pages, |
| .acl_len = buflen, |
| }; |
| struct nfs_getaclres res = { |
| .acl_len = buflen, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); |
| int ret = -ENOMEM, i; |
| |
| /* As long as we're doing a round trip to the server anyway, |
| * let's be prepared for a page of acl data. */ |
| if (npages == 0) |
| npages = 1; |
| if (npages > ARRAY_SIZE(pages)) |
| return -ERANGE; |
| |
| for (i = 0; i < npages; i++) { |
| pages[i] = alloc_page(GFP_KERNEL); |
| if (!pages[i]) |
| goto out_free; |
| } |
| |
| /* for decoding across pages */ |
| res.acl_scratch = alloc_page(GFP_KERNEL); |
| if (!res.acl_scratch) |
| goto out_free; |
| |
| args.acl_len = npages * PAGE_SIZE; |
| args.acl_pgbase = 0; |
| |
| dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", |
| __func__, buf, buflen, npages, args.acl_len); |
| ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), |
| &msg, &args.seq_args, &res.seq_res, 0); |
| if (ret) |
| goto out_free; |
| |
| /* Handle the case where the passed-in buffer is too short */ |
| if (res.acl_flags & NFS4_ACL_TRUNC) { |
| /* Did the user only issue a request for the acl length? */ |
| if (buf == NULL) |
| goto out_ok; |
| ret = -ERANGE; |
| goto out_free; |
| } |
| nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); |
| if (buf) { |
| if (res.acl_len > buflen) { |
| ret = -ERANGE; |
| goto out_free; |
| } |
| _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); |
| } |
| out_ok: |
| ret = res.acl_len; |
| out_free: |
| for (i = 0; i < npages; i++) |
| if (pages[i]) |
| __free_page(pages[i]); |
| if (res.acl_scratch) |
| __free_page(res.acl_scratch); |
| return ret; |
| } |
| |
| static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| { |
| struct nfs4_exception exception = { }; |
| ssize_t ret; |
| do { |
| ret = __nfs4_get_acl_uncached(inode, buf, buflen); |
| trace_nfs4_get_acl(inode, ret); |
| if (ret >= 0) |
| break; |
| ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); |
| } while (exception.retry); |
| return ret; |
| } |
| |
| static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| int ret; |
| |
| if (!nfs4_server_supports_acls(server)) |
| return -EOPNOTSUPP; |
| ret = nfs_revalidate_inode(server, inode); |
| if (ret < 0) |
| return ret; |
| if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
| nfs_zap_acl_cache(inode); |
| ret = nfs4_read_cached_acl(inode, buf, buflen); |
| if (ret != -ENOENT) |
| /* -ENOENT is returned if there is no ACL or if there is an ACL |
| * but no cached acl data, just the acl length */ |
| return ret; |
| return nfs4_get_acl_uncached(inode, buf, buflen); |
| } |
| |
| static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct page *pages[NFS4ACL_MAXPAGES]; |
| struct nfs_setaclargs arg = { |
| .fh = NFS_FH(inode), |
| .acl_pages = pages, |
| .acl_len = buflen, |
| }; |
| struct nfs_setaclres res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); |
| int ret, i; |
| |
| if (!nfs4_server_supports_acls(server)) |
| return -EOPNOTSUPP; |
| if (npages > ARRAY_SIZE(pages)) |
| return -ERANGE; |
| i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
| if (i < 0) |
| return i; |
| nfs4_inode_return_delegation(inode); |
| ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| |
| /* |
| * Free each page after tx, so the only ref left is |
| * held by the network stack |
| */ |
| for (; i > 0; i--) |
| put_page(pages[i-1]); |
| |
| /* |
| * Acl update can result in inode attribute update. |
| * so mark the attribute cache invalid. |
| */ |
| spin_lock(&inode->i_lock); |
| NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; |
| spin_unlock(&inode->i_lock); |
| nfs_access_zap_cache(inode); |
| nfs_zap_acl_cache(inode); |
| return ret; |
| } |
| |
| static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = __nfs4_proc_set_acl(inode, buf, buflen); |
| trace_nfs4_set_acl(inode, err); |
| err = nfs4_handle_exception(NFS_SERVER(inode), err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
| static int _nfs4_get_security_label(struct inode *inode, void *buf, |
| size_t buflen) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs_fattr fattr; |
| struct nfs4_label label = {0, 0, buflen, buf}; |
| |
| u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; |
| struct nfs4_getattr_arg arg = { |
| .fh = NFS_FH(inode), |
| .bitmask = bitmask, |
| }; |
| struct nfs4_getattr_res res = { |
| .fattr = &fattr, |
| .label = &label, |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int ret; |
| |
| nfs_fattr_init(&fattr); |
| |
| ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); |
| if (ret) |
| return ret; |
| if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) |
| return -ENOENT; |
| if (buflen < label.len) |
| return -ERANGE; |
| return 0; |
| } |
| |
| static int nfs4_get_security_label(struct inode *inode, void *buf, |
| size_t buflen) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) |
| return -EOPNOTSUPP; |
| |
| do { |
| err = _nfs4_get_security_label(inode, buf, buflen); |
| trace_nfs4_get_security_label(inode, err); |
| err = nfs4_handle_exception(NFS_SERVER(inode), err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_do_set_security_label(struct inode *inode, |
| struct nfs4_label *ilabel, |
| struct nfs_fattr *fattr, |
| struct nfs4_label *olabel) |
| { |
| |
| struct iattr sattr = {0}; |
| struct nfs_server *server = NFS_SERVER(inode); |
| const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; |
| struct nfs_setattrargs arg = { |
| .fh = NFS_FH(inode), |
| .iap = &sattr, |
| .server = server, |
| .bitmask = bitmask, |
| .label = ilabel, |
| }; |
| struct nfs_setattrres res = { |
| .fattr = fattr, |
| .label = olabel, |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| nfs4_stateid_copy(&arg.stateid, &zero_stateid); |
| |
| status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| if (status) |
| dprintk("%s failed: %d\n", __func__, status); |
| |
| return status; |
| } |
| |
| static int nfs4_do_set_security_label(struct inode *inode, |
| struct nfs4_label *ilabel, |
| struct nfs_fattr *fattr, |
| struct nfs4_label *olabel) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = _nfs4_do_set_security_label(inode, ilabel, |
| fattr, olabel); |
| trace_nfs4_set_security_label(inode, err); |
| err = nfs4_handle_exception(NFS_SERVER(inode), err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int |
| nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen) |
| { |
| struct nfs4_label ilabel, *olabel = NULL; |
| struct nfs_fattr fattr; |
| struct rpc_cred *cred; |
| struct inode *inode = d_inode(dentry); |
| int status; |
| |
| if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) |
| return -EOPNOTSUPP; |
| |
| nfs_fattr_init(&fattr); |
| |
| ilabel.pi = 0; |
| ilabel.lfs = 0; |
| ilabel.label = (char *)buf; |
| ilabel.len = buflen; |
| |
| cred = rpc_lookup_cred(); |
| if (IS_ERR(cred)) |
| return PTR_ERR(cred); |
| |
| olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); |
| if (IS_ERR(olabel)) { |
| status = -PTR_ERR(olabel); |
| goto out; |
| } |
| |
| status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); |
| if (status == 0) |
| nfs_setsecurity(inode, &fattr, olabel); |
| |
| nfs4_label_free(olabel); |
| out: |
| put_rpccred(cred); |
| return status; |
| } |
| #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ |
| |
| |
| static int |
| nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, |
| struct nfs4_state *state, long *timeout) |
| { |
| struct nfs_client *clp = server->nfs_client; |
| |
| if (task->tk_status >= 0) |
| return 0; |
| switch(task->tk_status) { |
| case -NFS4ERR_DELEG_REVOKED: |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| case -NFS4ERR_OPENMODE: |
| if (state == NULL) |
| break; |
| if (nfs4_schedule_stateid_recovery(server, state) < 0) |
| goto recovery_failed; |
| goto wait_on_recovery; |
| case -NFS4ERR_EXPIRED: |
| if (state != NULL) { |
| if (nfs4_schedule_stateid_recovery(server, state) < 0) |
| goto recovery_failed; |
| } |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_STALE_CLIENTID: |
| nfs4_schedule_lease_recovery(clp); |
| goto wait_on_recovery; |
| case -NFS4ERR_MOVED: |
| if (nfs4_schedule_migration_recovery(server) < 0) |
| goto recovery_failed; |
| goto wait_on_recovery; |
| case -NFS4ERR_LEASE_MOVED: |
| nfs4_schedule_lease_moved_recovery(clp); |
| goto wait_on_recovery; |
| #if defined(CONFIG_NFS_V4_1) |
| case -NFS4ERR_BADSESSION: |
| case -NFS4ERR_BADSLOT: |
| case -NFS4ERR_BAD_HIGH_SLOT: |
| case -NFS4ERR_DEADSESSION: |
| case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| case -NFS4ERR_SEQ_FALSE_RETRY: |
| case -NFS4ERR_SEQ_MISORDERED: |
| dprintk("%s ERROR %d, Reset session\n", __func__, |
| task->tk_status); |
| nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); |
| goto wait_on_recovery; |
| #endif /* CONFIG_NFS_V4_1 */ |
| case -NFS4ERR_DELAY: |
| nfs_inc_server_stats(server, NFSIOS_DELAY); |
| rpc_delay(task, nfs4_update_delay(timeout)); |
| goto restart_call; |
| case -NFS4ERR_GRACE: |
| rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| case -NFS4ERR_RETRY_UNCACHED_REP: |
| case -NFS4ERR_OLD_STATEID: |
| goto restart_call; |
| } |
| task->tk_status = nfs4_map_errors(task->tk_status); |
| return 0; |
| recovery_failed: |
| task->tk_status = -EIO; |
| return 0; |
| wait_on_recovery: |
| rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
| if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
| rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
| if (test_bit(NFS_MIG_FAILED, &server->mig_status)) |
| goto recovery_failed; |
| restart_call: |
| task->tk_status = 0; |
| return -EAGAIN; |
| } |
| |
| static void nfs4_init_boot_verifier(const struct nfs_client *clp, |
| nfs4_verifier *bootverf) |
| { |
| __be32 verf[2]; |
| |
| if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
| /* An impossible timestamp guarantees this value |
| * will never match a generated boot time. */ |
| verf[0] = 0; |
| verf[1] = cpu_to_be32(NSEC_PER_SEC + 1); |
| } else { |
| struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
| verf[0] = cpu_to_be32(nn->boot_time.tv_sec); |
| verf[1] = cpu_to_be32(nn->boot_time.tv_nsec); |
| } |
| memcpy(bootverf->data, verf, sizeof(bootverf->data)); |
| } |
| |
| static int |
| nfs4_init_nonuniform_client_string(struct nfs_client *clp) |
| { |
| int result; |
| size_t len; |
| char *str; |
| |
| if (clp->cl_owner_id != NULL) |
| return 0; |
| |
| rcu_read_lock(); |
| len = 14 + strlen(clp->cl_ipaddr) + 1 + |
| strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + |
| 1 + |
| strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) + |
| 1; |
| rcu_read_unlock(); |
| |
| if (len > NFS4_OPAQUE_LIMIT + 1) |
| return -EINVAL; |
| |
| /* |
| * Since this string is allocated at mount time, and held until the |
| * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying |
| * about a memory-reclaim deadlock. |
| */ |
| str = kmalloc(len, GFP_KERNEL); |
| if (!str) |
| return -ENOMEM; |
| |
| rcu_read_lock(); |
| result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s", |
| clp->cl_ipaddr, |
| rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR), |
| rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)); |
| rcu_read_unlock(); |
| |
| clp->cl_owner_id = str; |
| return 0; |
| } |
| |
| static int |
| nfs4_init_uniquifier_client_string(struct nfs_client *clp) |
| { |
| int result; |
| size_t len; |
| char *str; |
| |
| len = 10 + 10 + 1 + 10 + 1 + |
| strlen(nfs4_client_id_uniquifier) + 1 + |
| strlen(clp->cl_rpcclient->cl_nodename) + 1; |
| |
| if (len > NFS4_OPAQUE_LIMIT + 1) |
| return -EINVAL; |
| |
| /* |
| * Since this string is allocated at mount time, and held until the |
| * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying |
| * about a memory-reclaim deadlock. |
| */ |
| str = kmalloc(len, GFP_KERNEL); |
| if (!str) |
| return -ENOMEM; |
| |
| result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s", |
| clp->rpc_ops->version, clp->cl_minorversion, |
| nfs4_client_id_uniquifier, |
| clp->cl_rpcclient->cl_nodename); |
| clp->cl_owner_id = str; |
| return 0; |
| } |
| |
| static int |
| nfs4_init_uniform_client_string(struct nfs_client *clp) |
| { |
| int result; |
| size_t len; |
| char *str; |
| |
| if (clp->cl_owner_id != NULL) |
| return 0; |
| |
| if (nfs4_client_id_uniquifier[0] != '\0') |
| return nfs4_init_uniquifier_client_string(clp); |
| |
| len = 10 + 10 + 1 + 10 + 1 + |
| strlen(clp->cl_rpcclient->cl_nodename) + 1; |
| |
| if (len > NFS4_OPAQUE_LIMIT + 1) |
| return -EINVAL; |
| |
| /* |
| * Since this string is allocated at mount time, and held until the |
| * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying |
| * about a memory-reclaim deadlock. |
| */ |
| str = kmalloc(len, GFP_KERNEL); |
| if (!str) |
| return -ENOMEM; |
| |
| result = scnprintf(str, len, "Linux NFSv%u.%u %s", |
| clp->rpc_ops->version, clp->cl_minorversion, |
| clp->cl_rpcclient->cl_nodename); |
| clp->cl_owner_id = str; |
| return 0; |
| } |
| |
| /* |
| * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback |
| * services. Advertise one based on the address family of the |
| * clientaddr. |
| */ |
| static unsigned int |
| nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) |
| { |
| if (strchr(clp->cl_ipaddr, ':') != NULL) |
| return scnprintf(buf, len, "tcp6"); |
| else |
| return scnprintf(buf, len, "tcp"); |
| } |
| |
| static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_setclientid *sc = calldata; |
| |
| if (task->tk_status == 0) |
| sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); |
| } |
| |
| static const struct rpc_call_ops nfs4_setclientid_ops = { |
| .rpc_call_done = nfs4_setclientid_done, |
| }; |
| |
| /** |
| * nfs4_proc_setclientid - Negotiate client ID |
| * @clp: state data structure |
| * @program: RPC program for NFSv4 callback service |
| * @port: IP port number for NFS4 callback service |
| * @cred: RPC credential to use for this call |
| * @res: where to place the result |
| * |
| * Returns zero, a negative errno, or a negative NFS4ERR status code. |
| */ |
| int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, |
| unsigned short port, struct rpc_cred *cred, |
| struct nfs4_setclientid_res *res) |
| { |
| nfs4_verifier sc_verifier; |
| struct nfs4_setclientid setclientid = { |
| .sc_verifier = &sc_verifier, |
| .sc_prog = program, |
| .sc_clnt = clp, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], |
| .rpc_argp = &setclientid, |
| .rpc_resp = res, |
| .rpc_cred = cred, |
| }; |
| struct rpc_task *task; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = clp->cl_rpcclient, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_setclientid_ops, |
| .callback_data = &setclientid, |
| .flags = RPC_TASK_TIMEOUT, |
| }; |
| int status; |
| |
| /* nfs_client_id4 */ |
| nfs4_init_boot_verifier(clp, &sc_verifier); |
| |
| if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) |
| status = nfs4_init_uniform_client_string(clp); |
| else |
| status = nfs4_init_nonuniform_client_string(clp); |
| |
| if (status) |
| goto out; |
| |
| /* cb_client4 */ |
| setclientid.sc_netid_len = |
| nfs4_init_callback_netid(clp, |
| setclientid.sc_netid, |
| sizeof(setclientid.sc_netid)); |
| setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
| sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
| clp->cl_ipaddr, port >> 8, port & 255); |
| |
| dprintk("NFS call setclientid auth=%s, '%s'\n", |
| clp->cl_rpcclient->cl_auth->au_ops->au_name, |
| clp->cl_owner_id); |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) { |
| status = PTR_ERR(task); |
| goto out; |
| } |
| status = task->tk_status; |
| if (setclientid.sc_cred) { |
| clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); |
| put_rpccred(setclientid.sc_cred); |
| } |
| rpc_put_task(task); |
| out: |
| trace_nfs4_setclientid(clp, status); |
| dprintk("NFS reply setclientid: %d\n", status); |
| return status; |
| } |
| |
| /** |
| * nfs4_proc_setclientid_confirm - Confirm client ID |
| * @clp: state data structure |
| * @res: result of a previous SETCLIENTID |
| * @cred: RPC credential to use for this call |
| * |
| * Returns zero, a negative errno, or a negative NFS4ERR status code. |
| */ |
| int nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
| struct nfs4_setclientid_res *arg, |
| struct rpc_cred *cred) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], |
| .rpc_argp = arg, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", |
| clp->cl_rpcclient->cl_auth->au_ops->au_name, |
| clp->cl_clientid); |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| trace_nfs4_setclientid_confirm(clp, status); |
| dprintk("NFS reply setclientid_confirm: %d\n", status); |
| return status; |
| } |
| |
| struct nfs4_delegreturndata { |
| struct nfs4_delegreturnargs args; |
| struct nfs4_delegreturnres res; |
| struct nfs_fh fh; |
| nfs4_stateid stateid; |
| unsigned long timestamp; |
| struct nfs_fattr fattr; |
| int rpc_status; |
| struct inode *inode; |
| bool roc; |
| u32 roc_barrier; |
| }; |
| |
| static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_delegreturndata *data = calldata; |
| |
| if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| return; |
| |
| trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); |
| switch (task->tk_status) { |
| case 0: |
| renew_lease(data->res.server, data->timestamp); |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_DELEG_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| case -NFS4ERR_OLD_STATEID: |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| task->tk_status = 0; |
| if (data->roc) |
| pnfs_roc_set_barrier(data->inode, data->roc_barrier); |
| break; |
| default: |
| if (nfs4_async_handle_error(task, data->res.server, |
| NULL, NULL) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| } |
| data->rpc_status = task->tk_status; |
| } |
| |
| static void nfs4_delegreturn_release(void *calldata) |
| { |
| struct nfs4_delegreturndata *data = calldata; |
| struct inode *inode = data->inode; |
| |
| if (inode) { |
| if (data->roc) |
| pnfs_roc_release(inode); |
| nfs_iput_and_deactive(inode); |
| } |
| kfree(calldata); |
| } |
| |
| static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs4_delegreturndata *d_data; |
| |
| d_data = (struct nfs4_delegreturndata *)data; |
| |
| if (nfs4_wait_on_layoutreturn(d_data->inode, task)) |
| return; |
| |
| if (d_data->roc) |
| pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier); |
| |
| nfs4_setup_sequence(d_data->res.server, |
| &d_data->args.seq_args, |
| &d_data->res.seq_res, |
| task); |
| } |
| |
| static const struct rpc_call_ops nfs4_delegreturn_ops = { |
| .rpc_call_prepare = nfs4_delegreturn_prepare, |
| .rpc_call_done = nfs4_delegreturn_done, |
| .rpc_release = nfs4_delegreturn_release, |
| }; |
| |
| static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
| { |
| struct nfs4_delegreturndata *data; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], |
| .rpc_cred = cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_delegreturn_ops, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int status = 0; |
| |
| data = kzalloc(sizeof(*data), GFP_NOFS); |
| if (data == NULL) |
| return -ENOMEM; |
| nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); |
| data->args.fhandle = &data->fh; |
| data->args.stateid = &data->stateid; |
| data->args.bitmask = server->cache_consistency_bitmask; |
| nfs_copy_fh(&data->fh, NFS_FH(inode)); |
| nfs4_stateid_copy(&data->stateid, stateid); |
| data->res.fattr = &data->fattr; |
| data->res.server = server; |
| nfs_fattr_init(data->res.fattr); |
| data->timestamp = jiffies; |
| data->rpc_status = 0; |
| data->inode = nfs_igrab_and_active(inode); |
| if (data->inode) |
| data->roc = nfs4_roc(inode); |
| |
| task_setup_data.callback_data = data; |
| msg.rpc_argp = &data->args; |
| msg.rpc_resp = &data->res; |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| if (!issync) |
| goto out; |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status != 0) |
| goto out; |
| status = data->rpc_status; |
| if (status == 0) |
| nfs_post_op_update_inode_force_wcc(inode, &data->fattr); |
| else |
| nfs_refresh_inode(inode, &data->fattr); |
| out: |
| rpc_put_task(task); |
| return status; |
| } |
| |
| int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
| trace_nfs4_delegreturn(inode, err); |
| switch (err) { |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| case 0: |
| return 0; |
| } |
| err = nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| #define NFS4_LOCK_MINTIMEOUT (1 * HZ) |
| #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) |
| |
| /* |
| * sleep, with exponential backoff, and retry the LOCK operation. |
| */ |
| static unsigned long |
| nfs4_set_lock_task_retry(unsigned long timeout) |
| { |
| freezable_schedule_timeout_killable_unsafe(timeout); |
| timeout <<= 1; |
| if (timeout > NFS4_LOCK_MAXTIMEOUT) |
| return NFS4_LOCK_MAXTIMEOUT; |
| return timeout; |
| } |
| |
| static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct inode *inode = state->inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs_client *clp = server->nfs_client; |
| struct nfs_lockt_args arg = { |
| .fh = NFS_FH(inode), |
| .fl = request, |
| }; |
| struct nfs_lockt_res res = { |
| .denied = request, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| .rpc_cred = state->owner->so_cred, |
| }; |
| struct nfs4_lock_state *lsp; |
| int status; |
| |
| arg.lock_owner.clientid = clp->cl_clientid; |
| status = nfs4_set_lock_state(state, request); |
| if (status != 0) |
| goto out; |
| lsp = request->fl_u.nfs4_fl.owner; |
| arg.lock_owner.id = lsp->ls_seqid.owner_id; |
| arg.lock_owner.s_dev = server->s_dev; |
| status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
| switch (status) { |
| case 0: |
| request->fl_type = F_UNLCK; |
| break; |
| case -NFS4ERR_DENIED: |
| status = 0; |
| } |
| request->fl_ops->fl_release_private(request); |
| request->fl_ops = NULL; |
| out: |
| return status; |
| } |
| |
| static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = _nfs4_proc_getlk(state, cmd, request); |
| trace_nfs4_get_lock(request, state, cmd, err); |
| err = nfs4_handle_exception(NFS_SERVER(state->inode), err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int do_vfs_lock(struct inode *inode, struct file_lock *fl) |
| { |
| int res = 0; |
| switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { |
| case FL_POSIX: |
| res = posix_lock_inode_wait(inode, fl); |
| break; |
| case FL_FLOCK: |
| res = flock_lock_inode_wait(inode, fl); |
| break; |
| default: |
| BUG(); |
| } |
| return res; |
| } |
| |
| struct nfs4_unlockdata { |
| struct nfs_locku_args arg; |
| struct nfs_locku_res res; |
| struct nfs4_lock_state *lsp; |
| struct nfs_open_context *ctx; |
| struct file_lock fl; |
| const struct nfs_server *server; |
| unsigned long timestamp; |
| }; |
| |
| static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
| struct nfs_open_context *ctx, |
| struct nfs4_lock_state *lsp, |
| struct nfs_seqid *seqid) |
| { |
| struct nfs4_unlockdata *p; |
| struct inode *inode = lsp->ls_state->inode; |
| |
| p = kzalloc(sizeof(*p), GFP_NOFS); |
| if (p == NULL) |
| return NULL; |
| p->arg.fh = NFS_FH(inode); |
| p->arg.fl = &p->fl; |
| p->arg.seqid = seqid; |
| p->res.seqid = seqid; |
| p->lsp = lsp; |
| atomic_inc(&lsp->ls_count); |
| /* Ensure we don't close file until we're done freeing locks! */ |
| p->ctx = get_nfs_open_context(ctx); |
| memcpy(&p->fl, fl, sizeof(p->fl)); |
| p->server = NFS_SERVER(inode); |
| return p; |
| } |
| |
| static void nfs4_locku_release_calldata(void *data) |
| { |
| struct nfs4_unlockdata *calldata = data; |
| nfs_free_seqid(calldata->arg.seqid); |
| nfs4_put_lock_state(calldata->lsp); |
| put_nfs_open_context(calldata->ctx); |
| kfree(calldata); |
| } |
| |
| static void nfs4_locku_done(struct rpc_task *task, void *data) |
| { |
| struct nfs4_unlockdata *calldata = data; |
| |
| if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
| return; |
| switch (task->tk_status) { |
| case 0: |
| renew_lease(calldata->server, calldata->timestamp); |
| do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl); |
| if (nfs4_update_lock_stateid(calldata->lsp, |
| &calldata->res.stateid)) |
| break; |
| case -NFS4ERR_BAD_STATEID: |
| case -NFS4ERR_OLD_STATEID: |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| if (!nfs4_stateid_match(&calldata->arg.stateid, |
| &calldata->lsp->ls_stateid)) |
| rpc_restart_call_prepare(task); |
| break; |
| default: |
| if (nfs4_async_handle_error(task, calldata->server, |
| NULL, NULL) == -EAGAIN) |
| rpc_restart_call_prepare(task); |
| } |
| nfs_release_seqid(calldata->arg.seqid); |
| } |
| |
| static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs4_unlockdata *calldata = data; |
| |
| if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
| goto out_wait; |
| nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid); |
| if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { |
| /* Note: exit _without_ running nfs4_locku_done */ |
| goto out_no_action; |
| } |
| calldata->timestamp = jiffies; |
| if (nfs4_setup_sequence(calldata->server, |
| &calldata->arg.seq_args, |
| &calldata->res.seq_res, |
| task) != 0) |
| nfs_release_seqid(calldata->arg.seqid); |
| return; |
| out_no_action: |
| task->tk_action = NULL; |
| out_wait: |
| nfs4_sequence_done(task, &calldata->res.seq_res); |
| } |
| |
| static const struct rpc_call_ops nfs4_locku_ops = { |
| .rpc_call_prepare = nfs4_locku_prepare, |
| .rpc_call_done = nfs4_locku_done, |
| .rpc_release = nfs4_locku_release_calldata, |
| }; |
| |
| static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
| struct nfs_open_context *ctx, |
| struct nfs4_lock_state *lsp, |
| struct nfs_seqid *seqid) |
| { |
| struct nfs4_unlockdata *data; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], |
| .rpc_cred = ctx->cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = NFS_CLIENT(lsp->ls_state->inode), |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_locku_ops, |
| .workqueue = nfsiod_workqueue, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| |
| nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, |
| NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); |
| |
| /* Ensure this is an unlock - when canceling a lock, the |
| * canceled lock is passed in, and it won't be an unlock. |
| */ |
| fl->fl_type = F_UNLCK; |
| |
| data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
| if (data == NULL) { |
| nfs_free_seqid(seqid); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); |
| msg.rpc_argp = &data->arg; |
| msg.rpc_resp = &data->res; |
| task_setup_data.callback_data = data; |
| return rpc_run_task(&task_setup_data); |
| } |
| |
| static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct inode *inode = state->inode; |
| struct nfs4_state_owner *sp = state->owner; |
| struct nfs_inode *nfsi = NFS_I(inode); |
| struct nfs_seqid *seqid; |
| struct nfs4_lock_state *lsp; |
| struct rpc_task *task; |
| struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); |
| int status = 0; |
| unsigned char fl_flags = request->fl_flags; |
| |
| status = nfs4_set_lock_state(state, request); |
| /* Unlock _before_ we do the RPC call */ |
| request->fl_flags |= FL_EXISTS; |
| /* Exclude nfs_delegation_claim_locks() */ |
| mutex_lock(&sp->so_delegreturn_mutex); |
| /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ |
| down_read(&nfsi->rwsem); |
| if (do_vfs_lock(inode, request) == -ENOENT) { |
| up_read(&nfsi->rwsem); |
| mutex_unlock(&sp->so_delegreturn_mutex); |
| goto out; |
| } |
| up_read(&nfsi->rwsem); |
| mutex_unlock(&sp->so_delegreturn_mutex); |
| if (status != 0) |
| goto out; |
| /* Is this a delegated lock? */ |
| lsp = request->fl_u.nfs4_fl.owner; |
| if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) |
| goto out; |
| alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; |
| seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); |
| status = -ENOMEM; |
| if (IS_ERR(seqid)) |
| goto out; |
| task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
| status = PTR_ERR(task); |
| if (IS_ERR(task)) |
| goto out; |
| status = nfs4_wait_for_completion_rpc_task(task); |
| rpc_put_task(task); |
| out: |
| request->fl_flags = fl_flags; |
| trace_nfs4_unlock(request, state, F_SETLK, status); |
| return status; |
| } |
| |
| struct nfs4_lockdata { |
| struct nfs_lock_args arg; |
| struct nfs_lock_res res; |
| struct nfs4_lock_state *lsp; |
| struct nfs_open_context *ctx; |
| struct file_lock fl; |
| unsigned long timestamp; |
| int rpc_status; |
| int cancelled; |
| struct nfs_server *server; |
| }; |
| |
| static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, |
| struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, |
| gfp_t gfp_mask) |
| { |
| struct nfs4_lockdata *p; |
| struct inode *inode = lsp->ls_state->inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); |
| |
| p = kzalloc(sizeof(*p), gfp_mask); |
| if (p == NULL) |
| return NULL; |
| |
| p->arg.fh = NFS_FH(inode); |
| p->arg.fl = &p->fl; |
| p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); |
| if (IS_ERR(p->arg.open_seqid)) |
| goto out_free; |
| alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; |
| p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); |
| if (IS_ERR(p->arg.lock_seqid)) |
| goto out_free_seqid; |
| p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
| p->arg.lock_owner.id = lsp->ls_seqid.owner_id; |
| p->arg.lock_owner.s_dev = server->s_dev; |
| p->res.lock_seqid = p->arg.lock_seqid; |
| p->lsp = lsp; |
| p->server = server; |
| atomic_inc(&lsp->ls_count); |
| p->ctx = get_nfs_open_context(ctx); |
| get_file(fl->fl_file); |
| memcpy(&p->fl, fl, sizeof(p->fl)); |
| return p; |
| out_free_seqid: |
| nfs_free_seqid(p->arg.open_seqid); |
| out_free: |
| kfree(p); |
| return NULL; |
| } |
| |
| static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_lockdata *data = calldata; |
| struct nfs4_state *state = data->lsp->ls_state; |
| |
| dprintk("%s: begin!\n", __func__); |
| if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
| goto out_wait; |
| /* Do we need to do an open_to_lock_owner? */ |
| if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { |
| if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { |
| goto out_release_lock_seqid; |
| } |
| nfs4_stateid_copy(&data->arg.open_stateid, |
| &state->open_stateid); |
| data->arg.new_lock_owner = 1; |
| data->res.open_seqid = data->arg.open_seqid; |
| } else { |
| data->arg.new_lock_owner = 0; |
| nfs4_stateid_copy(&data->arg.lock_stateid, |
| &data->lsp->ls_stateid); |
| } |
| if (!nfs4_valid_open_stateid(state)) { |
| data->rpc_status = -EBADF; |
| task->tk_action = NULL; |
| goto out_release_open_seqid; |
| } |
| data->timestamp = jiffies; |
| if (nfs4_setup_sequence(data->server, |
| &data->arg.seq_args, |
| &data->res.seq_res, |
| task) == 0) |
| return; |
| out_release_open_seqid: |
| nfs_release_seqid(data->arg.open_seqid); |
| out_release_lock_seqid: |
| nfs_release_seqid(data->arg.lock_seqid); |
| out_wait: |
| nfs4_sequence_done(task, &data->res.seq_res); |
| dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
| } |
| |
| static void nfs4_lock_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_lockdata *data = calldata; |
| struct nfs4_lock_state *lsp = data->lsp; |
| |
| dprintk("%s: begin!\n", __func__); |
| |
| if (!nfs4_sequence_done(task, &data->res.seq_res)) |
| return; |
| |
| data->rpc_status = task->tk_status; |
| switch (task->tk_status) { |
| case 0: |
| renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), |
| data->timestamp); |
| if (data->arg.new_lock) { |
| data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); |
| if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) { |
| rpc_restart_call_prepare(task); |
| break; |
| } |
| } |
| if (data->arg.new_lock_owner != 0) { |
| nfs_confirm_seqid(&lsp->ls_seqid, 0); |
| nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); |
| set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); |
| } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) |
| rpc_restart_call_prepare(task); |
| break; |
| case -NFS4ERR_BAD_STATEID: |
| case -NFS4ERR_OLD_STATEID: |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| if (data->arg.new_lock_owner != 0) { |
| if (!nfs4_stateid_match(&data->arg.open_stateid, |
| &lsp->ls_state->open_stateid)) |
| rpc_restart_call_prepare(task); |
| } else if (!nfs4_stateid_match(&data->arg.lock_stateid, |
| &lsp->ls_stateid)) |
| rpc_restart_call_prepare(task); |
| } |
| dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
| } |
| |
| static void nfs4_lock_release(void *calldata) |
| { |
| struct nfs4_lockdata *data = calldata; |
| |
| dprintk("%s: begin!\n", __func__); |
| nfs_free_seqid(data->arg.open_seqid); |
| if (data->cancelled != 0) { |
| struct rpc_task *task; |
| task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, |
| data->arg.lock_seqid); |
| if (!IS_ERR(task)) |
| rpc_put_task_async(task); |
| dprintk("%s: cancelling lock!\n", __func__); |
| } else |
| nfs_free_seqid(data->arg.lock_seqid); |
| nfs4_put_lock_state(data->lsp); |
| put_nfs_open_context(data->ctx); |
| fput(data->fl.fl_file); |
| kfree(data); |
| dprintk("%s: done!\n", __func__); |
| } |
| |
| static const struct rpc_call_ops nfs4_lock_ops = { |
| .rpc_call_prepare = nfs4_lock_prepare, |
| .rpc_call_done = nfs4_lock_done, |
| .rpc_release = nfs4_lock_release, |
| }; |
| |
| static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) |
| { |
| switch (error) { |
| case -NFS4ERR_ADMIN_REVOKED: |
| case -NFS4ERR_BAD_STATEID: |
| lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; |
| if (new_lock_owner != 0 || |
| test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) |
| nfs4_schedule_stateid_recovery(server, lsp->ls_state); |
| break; |
| case -NFS4ERR_STALE_STATEID: |
| lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; |
| case -NFS4ERR_EXPIRED: |
| nfs4_schedule_lease_recovery(server->nfs_client); |
| }; |
| } |
| |
| static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) |
| { |
| struct nfs4_lockdata *data; |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
| .rpc_cred = state->owner->so_cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = NFS_CLIENT(state->inode), |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_lock_ops, |
| .workqueue = nfsiod_workqueue, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int ret; |
| |
| dprintk("%s: begin!\n", __func__); |
| data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
| fl->fl_u.nfs4_fl.owner, |
| recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); |
| if (data == NULL) |
| return -ENOMEM; |
| if (IS_SETLKW(cmd)) |
| data->arg.block = 1; |
| nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); |
| msg.rpc_argp = &data->arg; |
| msg.rpc_resp = &data->res; |
| task_setup_data.callback_data = data; |
| if (recovery_type > NFS_LOCK_NEW) { |
| if (recovery_type == NFS_LOCK_RECLAIM) |
| data->arg.reclaim = NFS_LOCK_RECLAIM; |
| nfs4_set_sequence_privileged(&data->arg.seq_args); |
| } else |
| data->arg.new_lock = 1; |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| ret = nfs4_wait_for_completion_rpc_task(task); |
| if (ret == 0) { |
| ret = data->rpc_status; |
| if (ret) |
| nfs4_handle_setlk_error(data->server, data->lsp, |
| data->arg.new_lock_owner, ret); |
| } else |
| data->cancelled = 1; |
| rpc_put_task(task); |
| dprintk("%s: done, ret = %d!\n", __func__, ret); |
| return ret; |
| } |
| |
| static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { |
| .inode = state->inode, |
| }; |
| int err; |
| |
| do { |
| /* Cache the lock if possible... */ |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
| return 0; |
| err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); |
| trace_nfs4_lock_reclaim(request, state, F_SETLK, err); |
| if (err != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { |
| .inode = state->inode, |
| }; |
| int err; |
| |
| err = nfs4_set_lock_state(state, request); |
| if (err != 0) |
| return err; |
| if (!recover_lost_locks) { |
| set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); |
| return 0; |
| } |
| do { |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
| return 0; |
| err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); |
| trace_nfs4_lock_expired(request, state, F_SETLK, err); |
| switch (err) { |
| default: |
| goto out; |
| case -NFS4ERR_GRACE: |
| case -NFS4ERR_DELAY: |
| nfs4_handle_exception(server, err, &exception); |
| err = 0; |
| } |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| #if defined(CONFIG_NFS_V4_1) |
| /** |
| * nfs41_check_expired_locks - possibly free a lock stateid |
| * |
| * @state: NFSv4 state for an inode |
| * |
| * Returns NFS_OK if recovery for this stateid is now finished. |
| * Otherwise a negative NFS4ERR value is returned. |
| */ |
| static int nfs41_check_expired_locks(struct nfs4_state *state) |
| { |
| int status, ret = -NFS4ERR_BAD_STATEID; |
| struct nfs4_lock_state *lsp; |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| |
| list_for_each_entry(lsp, &state->lock_states, ls_locks) { |
| if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
| struct rpc_cred *cred = lsp->ls_state->owner->so_cred; |
| |
| status = nfs41_test_stateid(server, |
| &lsp->ls_stateid, |
| cred); |
| trace_nfs4_test_lock_stateid(state, lsp, status); |
| if (status != NFS_OK) { |
| /* Free the stateid unless the server |
| * informs us the stateid is unrecognized. */ |
| if (status != -NFS4ERR_BAD_STATEID) |
| nfs41_free_stateid(server, |
| &lsp->ls_stateid, |
| cred); |
| clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); |
| ret = status; |
| } |
| } |
| }; |
| |
| return ret; |
| } |
| |
| static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) |
| { |
| int status = NFS_OK; |
| |
| if (test_bit(LK_STATE_IN_USE, &state->flags)) |
| status = nfs41_check_expired_locks(state); |
| if (status != NFS_OK) |
| status = nfs4_lock_expired(state, request); |
| return status; |
| } |
| #endif |
| |
| static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct nfs_inode *nfsi = NFS_I(state->inode); |
| unsigned char fl_flags = request->fl_flags; |
| int status = -ENOLCK; |
| |
| if ((fl_flags & FL_POSIX) && |
| !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) |
| goto out; |
| /* Is this a delegated open? */ |
| status = nfs4_set_lock_state(state, request); |
| if (status != 0) |
| goto out; |
| request->fl_flags |= FL_ACCESS; |
| status = do_vfs_lock(state->inode, request); |
| if (status < 0) |
| goto out; |
| down_read(&nfsi->rwsem); |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
| /* Yes: cache locks! */ |
| /* ...but avoid races with delegation recall... */ |
| request->fl_flags = fl_flags & ~FL_SLEEP; |
| status = do_vfs_lock(state->inode, request); |
| up_read(&nfsi->rwsem); |
| goto out; |
| } |
| up_read(&nfsi->rwsem); |
| status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); |
| out: |
| request->fl_flags = fl_flags; |
| return status; |
| } |
| |
| static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct nfs4_exception exception = { |
| .state = state, |
| .inode = state->inode, |
| }; |
| int err; |
| |
| do { |
| err = _nfs4_proc_setlk(state, cmd, request); |
| trace_nfs4_set_lock(request, state, cmd, err); |
| if (err == -NFS4ERR_DENIED) |
| err = -EAGAIN; |
| err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int |
| nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) |
| { |
| struct nfs_open_context *ctx; |
| struct nfs4_state *state; |
| unsigned long timeout = NFS4_LOCK_MINTIMEOUT; |
| int status; |
| |
| /* verify open state */ |
| ctx = nfs_file_open_context(filp); |
| state = ctx->state; |
| |
| if (request->fl_start < 0 || request->fl_end < 0) |
| return -EINVAL; |
| |
| if (IS_GETLK(cmd)) { |
| if (state != NULL) |
| return nfs4_proc_getlk(state, F_GETLK, request); |
| return 0; |
| } |
| |
| if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) |
| return -EINVAL; |
| |
| if (request->fl_type == F_UNLCK) { |
| if (state != NULL) |
| return nfs4_proc_unlck(state, cmd, request); |
| return 0; |
| } |
| |
| if (state == NULL) |
| return -ENOLCK; |
| /* |
| * Don't rely on the VFS having checked the file open mode, |
| * since it won't do this for flock() locks. |
| */ |
| switch (request->fl_type) { |
| case F_RDLCK: |
| if (!(filp->f_mode & FMODE_READ)) |
| return -EBADF; |
| break; |
| case F_WRLCK: |
| if (!(filp->f_mode & FMODE_WRITE)) |
| return -EBADF; |
| } |
| |
| do { |
| status = nfs4_proc_setlk(state, cmd, request); |
| if ((status != -EAGAIN) || IS_SETLK(cmd)) |
| break; |
| timeout = nfs4_set_lock_task_retry(timeout); |
| status = -ERESTARTSYS; |
| if (signalled()) |
| break; |
| } while(status < 0); |
| return status; |
| } |
| |
| int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| int err; |
| |
| err = nfs4_set_lock_state(state, fl); |
| if (err != 0) |
| return err; |
| err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); |
| return nfs4_handle_delegation_recall_error(server, state, stateid, err); |
| } |
| |
| struct nfs_release_lockowner_data { |
| struct nfs4_lock_state *lsp; |
| struct nfs_server *server; |
| struct nfs_release_lockowner_args args; |
| struct nfs_release_lockowner_res res; |
| unsigned long timestamp; |
| }; |
| |
| static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs_release_lockowner_data *data = calldata; |
| struct nfs_server *server = data->server; |
| nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, |
| &data->args.seq_args, &data->res.seq_res, task); |
| data->args.lock_owner.clientid = server->nfs_client->cl_clientid; |
| data->timestamp = jiffies; |
| } |
| |
| static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs_release_lockowner_data *data = calldata; |
| struct nfs_server *server = data->server; |
| |
| nfs40_sequence_done(task, &data->res.seq_res); |
| |
| switch (task->tk_status) { |
| case 0: |
| renew_lease(server, data->timestamp); |
| break; |
| case -NFS4ERR_STALE_CLIENTID: |
| case -NFS4ERR_EXPIRED: |
| nfs4_schedule_lease_recovery(server->nfs_client); |
| break; |
| case -NFS4ERR_LEASE_MOVED: |
| case -NFS4ERR_DELAY: |
| if (nfs4_async_handle_error(task, server, |
| NULL, NULL) == -EAGAIN) |
| rpc_restart_call_prepare(task); |
| } |
| } |
| |
| static void nfs4_release_lockowner_release(void *calldata) |
| { |
| struct nfs_release_lockowner_data *data = calldata; |
| nfs4_free_lock_state(data->server, data->lsp); |
| kfree(calldata); |
| } |
| |
| static const struct rpc_call_ops nfs4_release_lockowner_ops = { |
| .rpc_call_prepare = nfs4_release_lockowner_prepare, |
| .rpc_call_done = nfs4_release_lockowner_done, |
| .rpc_release = nfs4_release_lockowner_release, |
| }; |
| |
| static void |
| nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) |
| { |
| struct nfs_release_lockowner_data *data; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], |
| }; |
| |
| if (server->nfs_client->cl_mvops->minor_version != 0) |
| return; |
| |
| data = kmalloc(sizeof(*data), GFP_NOFS); |
| if (!data) |
| return; |
| data->lsp = lsp; |
| data->server = server; |
| data->args.lock_owner.clientid = server->nfs_client->cl_clientid; |
| data->args.lock_owner.id = lsp->ls_seqid.owner_id; |
| data->args.lock_owner.s_dev = server->s_dev; |
| |
| msg.rpc_argp = &data->args; |
| msg.rpc_resp = &data->res; |
| nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); |
| rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); |
| } |
| |
| #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
| |
| static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key, |
| const void *buf, size_t buflen, |
| int flags, int type) |
| { |
| if (strcmp(key, "") != 0) |
| return -EINVAL; |
| |
| return nfs4_proc_set_acl(d_inode(dentry), buf, buflen); |
| } |
| |
| static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key, |
| void *buf, size_t buflen, int type) |
| { |
| if (strcmp(key, "") != 0) |
| return -EINVAL; |
| |
| return nfs4_proc_get_acl(d_inode(dentry), buf, buflen); |
| } |
| |
| static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list, |
| size_t list_len, const char *name, |
| size_t name_len, int type) |
| { |
| size_t len = sizeof(XATTR_NAME_NFSV4_ACL); |
| |
| if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)))) |
| return 0; |
| |
| if (list && len <= list_len) |
| memcpy(list, XATTR_NAME_NFSV4_ACL, len); |
| return len; |
| } |
| |
| #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
| static inline int nfs4_server_supports_labels(struct nfs_server *server) |
| { |
| return server->caps & NFS_CAP_SECURITY_LABEL; |
| } |
| |
| static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key, |
| const void *buf, size_t buflen, |
| int flags, int type) |
| { |
| if (security_ismaclabel(key)) |
| return nfs4_set_security_label(dentry, buf, buflen); |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key, |
| void *buf, size_t buflen, int type) |
| { |
| if (security_ismaclabel(key)) |
| return nfs4_get_security_label(d_inode(dentry), buf, buflen); |
| return -EOPNOTSUPP; |
| } |
| |
| static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list, |
| size_t list_len, const char *name, |
| size_t name_len, int type) |
| { |
| size_t len = 0; |
| |
| if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) { |
| len = security_inode_listsecurity(d_inode(dentry), NULL, 0); |
| if (list && len <= list_len) |
| security_inode_listsecurity(d_inode(dentry), list, len); |
| } |
| return len; |
| } |
| |
| static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { |
| .prefix = XATTR_SECURITY_PREFIX, |
| .list = nfs4_xattr_list_nfs4_label, |
| .get = nfs4_xattr_get_nfs4_label, |
| .set = nfs4_xattr_set_nfs4_label, |
| }; |
| #endif |
| |
| |
| /* |
| * nfs_fhget will use either the mounted_on_fileid or the fileid |
| */ |
| static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
| { |
| if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || |
| (fattr->valid & NFS_ATTR_FATTR_FILEID)) && |
| (fattr->valid & NFS_ATTR_FATTR_FSID) && |
| (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) |
| return; |
| |
| fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | |
| NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; |
| fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
| fattr->nlink = 2; |
| } |
| |
| static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, |
| const struct qstr *name, |
| struct nfs4_fs_locations *fs_locations, |
| struct page *page) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| u32 bitmask[3] = { |
| [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
| }; |
| struct nfs4_fs_locations_arg args = { |
| .dir_fh = NFS_FH(dir), |
| .name = name, |
| .page = page, |
| .bitmask = bitmask, |
| }; |
| struct nfs4_fs_locations_res res = { |
| .fs_locations = fs_locations, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| dprintk("%s: start\n", __func__); |
| |
| /* Ask for the fileid of the absent filesystem if mounted_on_fileid |
| * is not supported */ |
| if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) |
| bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; |
| else |
| bitmask[0] |= FATTR4_WORD0_FILEID; |
| |
| nfs_fattr_init(&fs_locations->fattr); |
| fs_locations->server = server; |
| fs_locations->nlocations = 0; |
| status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| dprintk("%s: returned status = %d\n", __func__, status); |
| return status; |
| } |
| |
| int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, |
| const struct qstr *name, |
| struct nfs4_fs_locations *fs_locations, |
| struct page *page) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_proc_fs_locations(client, dir, name, |
| fs_locations, page); |
| trace_nfs4_get_fs_locations(dir, name, err); |
| err = nfs4_handle_exception(NFS_SERVER(dir), err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| /* |
| * This operation also signals the server that this client is |
| * performing migration recovery. The server can stop returning |
| * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is |
| * appended to this compound to identify the client ID which is |
| * performing recovery. |
| */ |
| static int _nfs40_proc_get_locations(struct inode *inode, |
| struct nfs4_fs_locations *locations, |
| struct page *page, struct rpc_cred *cred) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct rpc_clnt *clnt = server->client; |
| u32 bitmask[2] = { |
| [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
| }; |
| struct nfs4_fs_locations_arg args = { |
| .clientid = server->nfs_client->cl_clientid, |
| .fh = NFS_FH(inode), |
| .page = page, |
| .bitmask = bitmask, |
| .migration = 1, /* skip LOOKUP */ |
| .renew = 1, /* append RENEW */ |
| }; |
| struct nfs4_fs_locations_res res = { |
| .fs_locations = locations, |
| .migration = 1, |
| .renew = 1, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| unsigned long now = jiffies; |
| int status; |
| |
| nfs_fattr_init(&locations->fattr); |
| locations->server = server; |
| locations->nlocations = 0; |
| |
| nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); |
| nfs4_set_sequence_privileged(&args.seq_args); |
| status = nfs4_call_sync_sequence(clnt, server, &msg, |
| &args.seq_args, &res.seq_res); |
| if (status) |
| return status; |
| |
| renew_lease(server, now); |
| return 0; |
| } |
| |
| #ifdef CONFIG_NFS_V4_1 |
| |
| /* |
| * This operation also signals the server that this client is |
| * performing migration recovery. The server can stop asserting |
| * SEQ4_STATUS_LEASE_MOVED for this client. The client ID |
| * performing this operation is identified in the SEQUENCE |
| * operation in this compound. |
| * |
| * When the client supports GETATTR(fs_locations_info), it can |
| * be plumbed in here. |
| */ |
| static int _nfs41_proc_get_locations(struct inode *inode, |
| struct nfs4_fs_locations *locations, |
| struct page *page, struct rpc_cred *cred) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct rpc_clnt *clnt = server->client; |
| u32 bitmask[2] = { |
| [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
| }; |
| struct nfs4_fs_locations_arg args = { |
| .fh = NFS_FH(inode), |
| .page = page, |
| .bitmask = bitmask, |
| .migration = 1, /* skip LOOKUP */ |
| }; |
| struct nfs4_fs_locations_res res = { |
| .fs_locations = locations, |
| .migration = 1, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| nfs_fattr_init(&locations->fattr); |
| locations->server = server; |
| locations->nlocations = 0; |
| |
| nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); |
| nfs4_set_sequence_privileged(&args.seq_args); |
| status = nfs4_call_sync_sequence(clnt, server, &msg, |
| &args.seq_args, &res.seq_res); |
| if (status == NFS4_OK && |
| res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) |
| status = -NFS4ERR_LEASE_MOVED; |
| return status; |
| } |
| |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| /** |
| * nfs4_proc_get_locations - discover locations for a migrated FSID |
| * @inode: inode on FSID that is migrating |
| * @locations: result of query |
| * @page: buffer |
| * @cred: credential to use for this operation |
| * |
| * Returns NFS4_OK on success, a negative NFS4ERR status code if the |
| * operation failed, or a negative errno if a local error occurred. |
| * |
| * On success, "locations" is filled in, but if the server has |
| * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not |
| * asserted. |
| * |
| * -NFS4ERR_LEASE_MOVED is returned if the server still has leases |
| * from this client that require migration recovery. |
| */ |
| int nfs4_proc_get_locations(struct inode *inode, |
| struct nfs4_fs_locations *locations, |
| struct page *page, struct rpc_cred *cred) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs_client *clp = server->nfs_client; |
| const struct nfs4_mig_recovery_ops *ops = |
| clp->cl_mvops->mig_recovery_ops; |
| struct nfs4_exception exception = { }; |
| int status; |
| |
| dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, |
| (unsigned long long)server->fsid.major, |
| (unsigned long long)server->fsid.minor, |
| clp->cl_hostname); |
| nfs_display_fhandle(NFS_FH(inode), __func__); |
| |
| do { |
| status = ops->get_locations(inode, locations, page, cred); |
| if (status != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, status, &exception); |
| } while (exception.retry); |
| return status; |
| } |
| |
| /* |
| * This operation also signals the server that this client is |
| * performing "lease moved" recovery. The server can stop |
| * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation |
| * is appended to this compound to identify the client ID which is |
| * performing recovery. |
| */ |
| static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; |
| struct rpc_clnt *clnt = server->client; |
| struct nfs4_fsid_present_arg args = { |
| .fh = NFS_FH(inode), |
| .clientid = clp->cl_clientid, |
| .renew = 1, /* append RENEW */ |
| }; |
| struct nfs4_fsid_present_res res = { |
| .renew = 1, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| unsigned long now = jiffies; |
| int status; |
| |
| res.fh = nfs_alloc_fhandle(); |
| if (res.fh == NULL) |
| return -ENOMEM; |
| |
| nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); |
| nfs4_set_sequence_privileged(&args.seq_args); |
| status = nfs4_call_sync_sequence(clnt, server, &msg, |
| &args.seq_args, &res.seq_res); |
| nfs_free_fhandle(res.fh); |
| if (status) |
| return status; |
| |
| do_renew_lease(clp, now); |
| return 0; |
| } |
| |
| #ifdef CONFIG_NFS_V4_1 |
| |
| /* |
| * This operation also signals the server that this client is |
| * performing "lease moved" recovery. The server can stop asserting |
| * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing |
| * this operation is identified in the SEQUENCE operation in this |
| * compound. |
| */ |
| static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct rpc_clnt *clnt = server->client; |
| struct nfs4_fsid_present_arg args = { |
| .fh = NFS_FH(inode), |
| }; |
| struct nfs4_fsid_present_res res = { |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| res.fh = nfs_alloc_fhandle(); |
| if (res.fh == NULL) |
| return -ENOMEM; |
| |
| nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); |
| nfs4_set_sequence_privileged(&args.seq_args); |
| status = nfs4_call_sync_sequence(clnt, server, &msg, |
| &args.seq_args, &res.seq_res); |
| nfs_free_fhandle(res.fh); |
| if (status == NFS4_OK && |
| res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) |
| status = -NFS4ERR_LEASE_MOVED; |
| return status; |
| } |
| |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| /** |
| * nfs4_proc_fsid_present - Is this FSID present or absent on server? |
| * @inode: inode on FSID to check |
| * @cred: credential to use for this operation |
| * |
| * Server indicates whether the FSID is present, moved, or not |
| * recognized. This operation is necessary to clear a LEASE_MOVED |
| * condition for this client ID. |
| * |
| * Returns NFS4_OK if the FSID is present on this server, |
| * -NFS4ERR_MOVED if the FSID is no longer present, a negative |
| * NFS4ERR code if some error occurred on the server, or a |
| * negative errno if a local failure occurred. |
| */ |
| int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs_client *clp = server->nfs_client; |
| const struct nfs4_mig_recovery_ops *ops = |
| clp->cl_mvops->mig_recovery_ops; |
| struct nfs4_exception exception = { }; |
| int status; |
| |
| dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, |
| (unsigned long long)server->fsid.major, |
| (unsigned long long)server->fsid.minor, |
| clp->cl_hostname); |
| nfs_display_fhandle(NFS_FH(inode), __func__); |
| |
| do { |
| status = ops->fsid_present(inode, cred); |
| if (status != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, status, &exception); |
| } while (exception.retry); |
| return status; |
| } |
| |
| /** |
| * If 'use_integrity' is true and the state managment nfs_client |
| * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient |
| * and the machine credential as per RFC3530bis and RFC5661 Security |
| * Considerations sections. Otherwise, just use the user cred with the |
| * filesystem's rpc_client. |
| */ |
| static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) |
| { |
| int status; |
| struct nfs4_secinfo_arg args = { |
| .dir_fh = NFS_FH(dir), |
| .name = name, |
| }; |
| struct nfs4_secinfo_res res = { |
| .flavors = flavors, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| struct rpc_clnt *clnt = NFS_SERVER(dir)->client; |
| struct rpc_cred *cred = NULL; |
| |
| if (use_integrity) { |
| clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; |
| cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); |
| msg.rpc_cred = cred; |
| } |
| |
| dprintk("NFS call secinfo %s\n", name->name); |
| |
| nfs4_state_protect(NFS_SERVER(dir)->nfs_client, |
| NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); |
| |
| status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, |
| &res.seq_res, 0); |
| dprintk("NFS reply secinfo: %d\n", status); |
| |
| if (cred) |
| put_rpccred(cred); |
| |
| return status; |
| } |
| |
| int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, |
| struct nfs4_secinfo_flavors *flavors) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = -NFS4ERR_WRONGSEC; |
| |
| /* try to use integrity protection with machine cred */ |
| if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) |
| err = _nfs4_proc_secinfo(dir, name, flavors, true); |
| |
| /* |
| * if unable to use integrity protection, or SECINFO with |
| * integrity protection returns NFS4ERR_WRONGSEC (which is |
| * disallowed by spec, but exists in deployed servers) use |
| * the current filesystem's rpc_client and the user cred. |
| */ |
| if (err == -NFS4ERR_WRONGSEC) |
| err = _nfs4_proc_secinfo(dir, name, flavors, false); |
| |
| trace_nfs4_secinfo(dir, name, err); |
| err = nfs4_handle_exception(NFS_SERVER(dir), err, |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| #ifdef CONFIG_NFS_V4_1 |
| /* |
| * Check the exchange flags returned by the server for invalid flags, having |
| * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or |
| * DS flags set. |
| */ |
| static int nfs4_check_cl_exchange_flags(u32 flags) |
| { |
| if (flags & ~EXCHGID4_FLAG_MASK_R) |
| goto out_inval; |
| if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && |
| (flags & EXCHGID4_FLAG_USE_NON_PNFS)) |
| goto out_inval; |
| if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) |
| goto out_inval; |
| return NFS_OK; |
| out_inval: |
| return -NFS4ERR_INVAL; |
| } |
| |
| static bool |
| nfs41_same_server_scope(struct nfs41_server_scope *a, |
| struct nfs41_server_scope *b) |
| { |
| if (a->server_scope_sz == b->server_scope_sz && |
| memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) |
| return true; |
| |
| return false; |
| } |
| |
| /* |
| * nfs4_proc_bind_conn_to_session() |
| * |
| * The 4.1 client currently uses the same TCP connection for the |
| * fore and backchannel. |
| */ |
| int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| int status; |
| struct nfs41_bind_conn_to_session_args args = { |
| .client = clp, |
| .dir = NFS4_CDFC4_FORE_OR_BOTH, |
| }; |
| struct nfs41_bind_conn_to_session_res res; |
| struct rpc_message msg = { |
| .rpc_proc = |
| &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| |
| dprintk("--> %s\n", __func__); |
| |
| nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); |
| if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) |
| args.dir = NFS4_CDFC4_FORE; |
| |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| trace_nfs4_bind_conn_to_session(clp, status); |
| if (status == 0) { |
| if (memcmp(res.sessionid.data, |
| clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { |
| dprintk("NFS: %s: Session ID mismatch\n", __func__); |
| status = -EIO; |
| goto out; |
| } |
| if ((res.dir & args.dir) != res.dir || res.dir == 0) { |
| dprintk("NFS: %s: Unexpected direction from server\n", |
| __func__); |
| status = -EIO; |
| goto out; |
| } |
| if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { |
| dprintk("NFS: %s: Server returned RDMA mode = true\n", |
| __func__); |
| status = -EIO; |
| goto out; |
| } |
| } |
| out: |
| dprintk("<-- %s status= %d\n", __func__, status); |
| return status; |
| } |
| |
| /* |
| * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map |
| * and operations we'd like to see to enable certain features in the allow map |
| */ |
| static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { |
| .how = SP4_MACH_CRED, |
| .enforce.u.words = { |
| [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | |
| 1 << (OP_EXCHANGE_ID - 32) | |
| 1 << (OP_CREATE_SESSION - 32) | |
| 1 << (OP_DESTROY_SESSION - 32) | |
| 1 << (OP_DESTROY_CLIENTID - 32) |
| }, |
| .allow.u.words = { |
| [0] = 1 << (OP_CLOSE) | |
| 1 << (OP_LOCKU) | |
| 1 << (OP_COMMIT), |
| [1] = 1 << (OP_SECINFO - 32) | |
| 1 << (OP_SECINFO_NO_NAME - 32) | |
| 1 << (OP_TEST_STATEID - 32) | |
| 1 << (OP_FREE_STATEID - 32) | |
| 1 << (OP_WRITE - 32) |
| } |
| }; |
| |
| /* |
| * Select the state protection mode for client `clp' given the server results |
| * from exchange_id in `sp'. |
| * |
| * Returns 0 on success, negative errno otherwise. |
| */ |
| static int nfs4_sp4_select_mode(struct nfs_client *clp, |
| struct nfs41_state_protection *sp) |
| { |
| static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { |
| [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | |
| 1 << (OP_EXCHANGE_ID - 32) | |
| 1 << (OP_CREATE_SESSION - 32) | |
| 1 << (OP_DESTROY_SESSION - 32) | |
| 1 << (OP_DESTROY_CLIENTID - 32) |
| }; |
| unsigned int i; |
| |
| if (sp->how == SP4_MACH_CRED) { |
| /* Print state protect result */ |
| dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); |
| for (i = 0; i <= LAST_NFS4_OP; i++) { |
| if (test_bit(i, sp->enforce.u.longs)) |
| dfprintk(MOUNT, " enforce op %d\n", i); |
| if (test_bit(i, sp->allow.u.longs)) |
| dfprintk(MOUNT, " allow op %d\n", i); |
| } |
| |
| /* make sure nothing is on enforce list that isn't supported */ |
| for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { |
| if (sp->enforce.u.words[i] & ~supported_enforce[i]) { |
| dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); |
| return -EINVAL; |
| } |
| } |
| |
| /* |
| * Minimal mode - state operations are allowed to use machine |
| * credential. Note this already happens by default, so the |
| * client doesn't have to do anything more than the negotiation. |
| * |
| * NOTE: we don't care if EXCHANGE_ID is in the list - |
| * we're already using the machine cred for exchange_id |
| * and will never use a different cred. |
| */ |
| if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && |
| test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && |
| test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && |
| test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { |
| dfprintk(MOUNT, "sp4_mach_cred:\n"); |
| dfprintk(MOUNT, " minimal mode enabled\n"); |
| set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags); |
| } else { |
| dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); |
| return -EINVAL; |
| } |
| |
| if (test_bit(OP_CLOSE, sp->allow.u.longs) && |
| test_bit(OP_LOCKU, sp->allow.u.longs)) { |
| dfprintk(MOUNT, " cleanup mode enabled\n"); |
| set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags); |
| } |
| |
| if (test_bit(OP_SECINFO, sp->allow.u.longs) && |
| test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { |
| dfprintk(MOUNT, " secinfo mode enabled\n"); |
| set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags); |
| } |
| |
| if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && |
| test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { |
| dfprintk(MOUNT, " stateid mode enabled\n"); |
| set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags); |
| } |
| |
| if (test_bit(OP_WRITE, sp->allow.u.longs)) { |
| dfprintk(MOUNT, " write mode enabled\n"); |
| set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags); |
| } |
| |
| if (test_bit(OP_COMMIT, sp->allow.u.longs)) { |
| dfprintk(MOUNT, " commit mode enabled\n"); |
| set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * _nfs4_proc_exchange_id() |
| * |
| * Wrapper for EXCHANGE_ID operation. |
| */ |
| static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred, |
| u32 sp4_how) |
| { |
| nfs4_verifier verifier; |
| struct nfs41_exchange_id_args args = { |
| .verifier = &verifier, |
| .client = clp, |
| #ifdef CONFIG_NFS_V4_1_MIGRATION |
| .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | |
| EXCHGID4_FLAG_BIND_PRINC_STATEID | |
| EXCHGID4_FLAG_SUPP_MOVED_MIGR, |
| #else |
| .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | |
| EXCHGID4_FLAG_BIND_PRINC_STATEID, |
| #endif |
| }; |
| struct nfs41_exchange_id_res res = { |
| 0 |
| }; |
| int status; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| |
| nfs4_init_boot_verifier(clp, &verifier); |
| |
| status = nfs4_init_uniform_client_string(clp); |
| if (status) |
| goto out; |
| |
| dprintk("NFS call exchange_id auth=%s, '%s'\n", |
| clp->cl_rpcclient->cl_auth->au_ops->au_name, |
| clp->cl_owner_id); |
| |
| res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), |
| GFP_NOFS); |
| if (unlikely(res.server_owner == NULL)) { |
| status = -ENOMEM; |
| goto out; |
| } |
| |
| res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), |
| GFP_NOFS); |
| if (unlikely(res.server_scope == NULL)) { |
| status = -ENOMEM; |
| goto out_server_owner; |
| } |
| |
| res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); |
| if (unlikely(res.impl_id == NULL)) { |
| status = -ENOMEM; |
| goto out_server_scope; |
| } |
| |
| switch (sp4_how) { |
| case SP4_NONE: |
| args.state_protect.how = SP4_NONE; |
| break; |
| |
| case SP4_MACH_CRED: |
| args.state_protect = nfs4_sp4_mach_cred_request; |
| break; |
| |
| default: |
| /* unsupported! */ |
| WARN_ON_ONCE(1); |
| status = -EINVAL; |
| goto out_impl_id; |
| } |
| |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| trace_nfs4_exchange_id(clp, status); |
| if (status == 0) |
| status = nfs4_check_cl_exchange_flags(res.flags); |
| |
| if (status == 0) |
| status = nfs4_sp4_select_mode(clp, &res.state_protect); |
| |
| if (status == 0) { |
| clp->cl_clientid = res.clientid; |
| clp->cl_exchange_flags = res.flags; |
| /* Client ID is not confirmed */ |
| if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) { |
| clear_bit(NFS4_SESSION_ESTABLISHED, |
| &clp->cl_session->session_state); |
| clp->cl_seqid = res.seqid; |
| } |
| |
| kfree(clp->cl_serverowner); |
| clp->cl_serverowner = res.server_owner; |
| res.server_owner = NULL; |
| |
| /* use the most recent implementation id */ |
| kfree(clp->cl_implid); |
| clp->cl_implid = res.impl_id; |
| res.impl_id = NULL; |
| |
| if (clp->cl_serverscope != NULL && |
| !nfs41_same_server_scope(clp->cl_serverscope, |
| res.server_scope)) { |
| dprintk("%s: server_scope mismatch detected\n", |
| __func__); |
| set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); |
| kfree(clp->cl_serverscope); |
| clp->cl_serverscope = NULL; |
| } |
| |
| if (clp->cl_serverscope == NULL) { |
| clp->cl_serverscope = res.server_scope; |
| res.server_scope = NULL; |
| } |
| } |
| |
| out_impl_id: |
| kfree(res.impl_id); |
| out_server_scope: |
| kfree(res.server_scope); |
| out_server_owner: |
| kfree(res.server_owner); |
| out: |
| if (clp->cl_implid != NULL) |
| dprintk("NFS reply exchange_id: Server Implementation ID: " |
| "domain: %s, name: %s, date: %llu,%u\n", |
| clp->cl_implid->domain, clp->cl_implid->name, |
| clp->cl_implid->date.seconds, |
| clp->cl_implid->date.nseconds); |
| dprintk("NFS reply exchange_id: %d\n", status); |
| return status; |
| } |
| |
| /* |
| * nfs4_proc_exchange_id() |
| * |
| * Returns zero, a negative errno, or a negative NFS4ERR status code. |
| * |
| * Since the clientid has expired, all compounds using sessions |
| * associated with the stale clientid will be returning |
| * NFS4ERR_BADSESSION in the sequence operation, and will therefore |
| * be in some phase of session reset. |
| * |
| * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. |
| */ |
| int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; |
| int status; |
| |
| /* try SP4_MACH_CRED if krb5i/p */ |
| if (authflavor == RPC_AUTH_GSS_KRB5I || |
| authflavor == RPC_AUTH_GSS_KRB5P) { |
| status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); |
| if (!status) |
| return 0; |
| } |
| |
| /* try SP4_NONE */ |
| return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); |
| } |
| |
| static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, |
| struct rpc_cred *cred) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], |
| .rpc_argp = clp, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| trace_nfs4_destroy_clientid(clp, status); |
| if (status) |
| dprintk("NFS: Got error %d from the server %s on " |
| "DESTROY_CLIENTID.", status, clp->cl_hostname); |
| return status; |
| } |
| |
| static int nfs4_proc_destroy_clientid(struct nfs_client *clp, |
| struct rpc_cred *cred) |
| { |
| unsigned int loop; |
| int ret; |
| |
| for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
| ret = _nfs4_proc_destroy_clientid(clp, cred); |
| switch (ret) { |
| case -NFS4ERR_DELAY: |
| case -NFS4ERR_CLIENTID_BUSY: |
| ssleep(1); |
| break; |
| default: |
| return ret; |
| } |
| } |
| return 0; |
| } |
| |
| int nfs4_destroy_clientid(struct nfs_client *clp) |
| { |
| struct rpc_cred *cred; |
| int ret = 0; |
| |
| if (clp->cl_mvops->minor_version < 1) |
| goto out; |
| if (clp->cl_exchange_flags == 0) |
| goto out; |
| if (clp->cl_preserve_clid) |
| goto out; |
| cred = nfs4_get_clid_cred(clp); |
| ret = nfs4_proc_destroy_clientid(clp, cred); |
| if (cred) |
| put_rpccred(cred); |
| switch (ret) { |
| case 0: |
| case -NFS4ERR_STALE_CLIENTID: |
| clp->cl_exchange_flags = 0; |
| } |
| out: |
| return ret; |
| } |
| |
| struct nfs4_get_lease_time_data { |
| struct nfs4_get_lease_time_args *args; |
| struct nfs4_get_lease_time_res *res; |
| struct nfs_client *clp; |
| }; |
| |
| static void nfs4_get_lease_time_prepare(struct rpc_task *task, |
| void *calldata) |
| { |
| struct nfs4_get_lease_time_data *data = |
| (struct nfs4_get_lease_time_data *)calldata; |
| |
| dprintk("--> %s\n", __func__); |
| /* just setup sequence, do not trigger session recovery |
| since we're invoked within one */ |
| nfs41_setup_sequence(data->clp->cl_session, |
| &data->args->la_seq_args, |
| &data->res->lr_seq_res, |
| task); |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| /* |
| * Called from nfs4_state_manager thread for session setup, so don't recover |
| * from sequence operation or clientid errors. |
| */ |
| static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_get_lease_time_data *data = |
| (struct nfs4_get_lease_time_data *)calldata; |
| |
| dprintk("--> %s\n", __func__); |
| if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) |
| return; |
| switch (task->tk_status) { |
| case -NFS4ERR_DELAY: |
| case -NFS4ERR_GRACE: |
| dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); |
| rpc_delay(task, NFS4_POLL_RETRY_MIN); |
| task->tk_status = 0; |
| /* fall through */ |
| case -NFS4ERR_RETRY_UNCACHED_REP: |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static const struct rpc_call_ops nfs4_get_lease_time_ops = { |
| .rpc_call_prepare = nfs4_get_lease_time_prepare, |
| .rpc_call_done = nfs4_get_lease_time_done, |
| }; |
| |
| int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) |
| { |
| struct rpc_task *task; |
| struct nfs4_get_lease_time_args args; |
| struct nfs4_get_lease_time_res res = { |
| .lr_fsinfo = fsinfo, |
| }; |
| struct nfs4_get_lease_time_data data = { |
| .args = &args, |
| .res = &res, |
| .clp = clp, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| struct rpc_task_setup task_setup = { |
| .rpc_client = clp->cl_rpcclient, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_get_lease_time_ops, |
| .callback_data = &data, |
| .flags = RPC_TASK_TIMEOUT, |
| }; |
| int status; |
| |
| nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); |
| nfs4_set_sequence_privileged(&args.la_seq_args); |
| dprintk("--> %s\n", __func__); |
| task = rpc_run_task(&task_setup); |
| |
| if (IS_ERR(task)) |
| status = PTR_ERR(task); |
| else { |
| status = task->tk_status; |
| rpc_put_task(task); |
| } |
| dprintk("<-- %s return %d\n", __func__, status); |
| |
| return status; |
| } |
| |
| /* |
| * Initialize the values to be used by the client in CREATE_SESSION |
| * If nfs4_init_session set the fore channel request and response sizes, |
| * use them. |
| * |
| * Set the back channel max_resp_sz_cached to zero to force the client to |
| * always set csa_cachethis to FALSE because the current implementation |
| * of the back channel DRC only supports caching the CB_SEQUENCE operation. |
| */ |
| static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) |
| { |
| unsigned int max_rqst_sz, max_resp_sz; |
| |
| max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; |
| max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; |
| |
| /* Fore channel attributes */ |
| args->fc_attrs.max_rqst_sz = max_rqst_sz; |
| args->fc_attrs.max_resp_sz = max_resp_sz; |
| args->fc_attrs.max_ops = NFS4_MAX_OPS; |
| args->fc_attrs.max_reqs = max_session_slots; |
| |
| dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " |
| "max_ops=%u max_reqs=%u\n", |
| __func__, |
| args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, |
| args->fc_attrs.max_ops, args->fc_attrs.max_reqs); |
| |
| /* Back channel attributes */ |
| args->bc_attrs.max_rqst_sz = PAGE_SIZE; |
| args->bc_attrs.max_resp_sz = PAGE_SIZE; |
| args->bc_attrs.max_resp_sz_cached = 0; |
| args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; |
| args->bc_attrs.max_reqs = 1; |
| |
| dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " |
| "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", |
| __func__, |
| args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, |
| args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, |
| args->bc_attrs.max_reqs); |
| } |
| |
| static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, |
| struct nfs41_create_session_res *res) |
| { |
| struct nfs4_channel_attrs *sent = &args->fc_attrs; |
| struct nfs4_channel_attrs *rcvd = &res->fc_attrs; |
| |
| if (rcvd->max_resp_sz > sent->max_resp_sz) |
| return -EINVAL; |
| /* |
| * Our requested max_ops is the minimum we need; we're not |
| * prepared to break up compounds into smaller pieces than that. |
| * So, no point even trying to continue if the server won't |
| * cooperate: |
| */ |
| if (rcvd->max_ops < sent->max_ops) |
| return -EINVAL; |
| if (rcvd->max_reqs == 0) |
| return -EINVAL; |
| if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) |
| rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; |
| return 0; |
| } |
| |
| static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, |
| struct nfs41_create_session_res *res) |
| { |
| struct nfs4_channel_attrs *sent = &args->bc_attrs; |
| struct nfs4_channel_attrs *rcvd = &res->bc_attrs; |
| |
| if (!(res->flags & SESSION4_BACK_CHAN)) |
| goto out; |
| if (rcvd->max_rqst_sz > sent->max_rqst_sz) |
| return -EINVAL; |
| if (rcvd->max_resp_sz < sent->max_resp_sz) |
| return -EINVAL; |
| if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) |
| return -EINVAL; |
| /* These would render the backchannel useless: */ |
| if (rcvd->max_ops != sent->max_ops) |
| return -EINVAL; |
| if (rcvd->max_reqs != sent->max_reqs) |
| return -EINVAL; |
| out: |
| return 0; |
| } |
| |
| static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, |
| struct nfs41_create_session_res *res) |
| { |
| int ret; |
| |
| ret = nfs4_verify_fore_channel_attrs(args, res); |
| if (ret) |
| return ret; |
| return nfs4_verify_back_channel_attrs(args, res); |
| } |
| |
| static void nfs4_update_session(struct nfs4_session *session, |
| struct nfs41_create_session_res *res) |
| { |
| nfs4_copy_sessionid(&session->sess_id, &res->sessionid); |
| /* Mark client id and session as being confirmed */ |
| session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
| set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); |
| session->flags = res->flags; |
| memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); |
| if (res->flags & SESSION4_BACK_CHAN) |
| memcpy(&session->bc_attrs, &res->bc_attrs, |
| sizeof(session->bc_attrs)); |
| } |
| |
| static int _nfs4_proc_create_session(struct nfs_client *clp, |
| struct rpc_cred *cred) |
| { |
| struct nfs4_session *session = clp->cl_session; |
| struct nfs41_create_session_args args = { |
| .client = clp, |
| .clientid = clp->cl_clientid, |
| .seqid = clp->cl_seqid, |
| .cb_program = NFS4_CALLBACK, |
| }; |
| struct nfs41_create_session_res res; |
| |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| nfs4_init_channel_attrs(&args); |
| args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); |
| |
| status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| trace_nfs4_create_session(clp, status); |
| |
| if (!status) { |
| /* Verify the session's negotiated channel_attrs values */ |
| status = nfs4_verify_channel_attrs(&args, &res); |
| /* Increment the clientid slot sequence id */ |
| if (clp->cl_seqid == res.seqid) |
| clp->cl_seqid++; |
| if (status) |
| goto out; |
| nfs4_update_session(session, &res); |
| } |
| out: |
| return status; |
| } |
| |
| /* |
| * Issues a CREATE_SESSION operation to the server. |
| * It is the responsibility of the caller to verify the session is |
| * expired before calling this routine. |
| */ |
| int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| int status; |
| unsigned *ptr; |
| struct nfs4_session *session = clp->cl_session; |
| |
| dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); |
| |
| status = _nfs4_proc_create_session(clp, cred); |
| if (status) |
| goto out; |
| |
| /* Init or reset the session slot tables */ |
| status = nfs4_setup_session_slot_tables(session); |
| dprintk("slot table setup returned %d\n", status); |
| if (status) |
| goto out; |
| |
| ptr = (unsigned *)&session->sess_id.data[0]; |
| dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, |
| clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); |
| out: |
| dprintk("<-- %s\n", __func__); |
| return status; |
| } |
| |
| /* |
| * Issue the over-the-wire RPC DESTROY_SESSION. |
| * The caller must serialize access to this routine. |
| */ |
| int nfs4_proc_destroy_session(struct nfs4_session *session, |
| struct rpc_cred *cred) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], |
| .rpc_argp = session, |
| .rpc_cred = cred, |
| }; |
| int status = 0; |
| |
| dprintk("--> nfs4_proc_destroy_session\n"); |
| |
| /* session is still being setup */ |
| if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) |
| return 0; |
| |
| status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
| trace_nfs4_destroy_session(session->clp, status); |
| |
| if (status) |
| dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " |
| "Session has been destroyed regardless...\n", status); |
| |
| dprintk("<-- nfs4_proc_destroy_session\n"); |
| return status; |
| } |
| |
| /* |
| * Renew the cl_session lease. |
| */ |
| struct nfs4_sequence_data { |
| struct nfs_client *clp; |
| struct nfs4_sequence_args args; |
| struct nfs4_sequence_res res; |
| }; |
| |
| static void nfs41_sequence_release(void *data) |
| { |
| struct nfs4_sequence_data *calldata = data; |
| struct nfs_client *clp = calldata->clp; |
| |
| if (atomic_read(&clp->cl_count) > 1) |
| nfs4_schedule_state_renewal(clp); |
| nfs_put_client(clp); |
| kfree(calldata); |
| } |
| |
| static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
| { |
| switch(task->tk_status) { |
| case -NFS4ERR_DELAY: |
| rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| return -EAGAIN; |
| default: |
| nfs4_schedule_lease_recovery(clp); |
| } |
| return 0; |
| } |
| |
| static void nfs41_sequence_call_done(struct rpc_task *task, void *data) |
| { |
| struct nfs4_sequence_data *calldata = data; |
| struct nfs_client *clp = calldata->clp; |
| |
| if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) |
| return; |
| |
| trace_nfs4_sequence(clp, task->tk_status); |
| if (task->tk_status < 0) { |
| dprintk("%s ERROR %d\n", __func__, task->tk_status); |
| if (atomic_read(&clp->cl_count) == 1) |
| goto out; |
| |
| if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| } |
| dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); |
| out: |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static void nfs41_sequence_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs4_sequence_data *calldata = data; |
| struct nfs_client *clp = calldata->clp; |
| struct nfs4_sequence_args *args; |
| struct nfs4_sequence_res *res; |
| |
| args = task->tk_msg.rpc_argp; |
| res = task->tk_msg.rpc_resp; |
| |
| nfs41_setup_sequence(clp->cl_session, args, res, task); |
| } |
| |
| static const struct rpc_call_ops nfs41_sequence_ops = { |
| .rpc_call_done = nfs41_sequence_call_done, |
| .rpc_call_prepare = nfs41_sequence_prepare, |
| .rpc_release = nfs41_sequence_release, |
| }; |
| |
| static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, |
| struct rpc_cred *cred, |
| bool is_privileged) |
| { |
| struct nfs4_sequence_data *calldata; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], |
| .rpc_cred = cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = clp->cl_rpcclient, |
| .rpc_message = &msg, |
| .callback_ops = &nfs41_sequence_ops, |
| .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, |
| }; |
| |
| if (!atomic_inc_not_zero(&clp->cl_count)) |
| return ERR_PTR(-EIO); |
| calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
| if (calldata == NULL) { |
| nfs_put_client(clp); |
| return ERR_PTR(-ENOMEM); |
| } |
| nfs4_init_sequence(&calldata->args, &calldata->res, 0); |
| if (is_privileged) |
| nfs4_set_sequence_privileged(&calldata->args); |
| msg.rpc_argp = &calldata->args; |
| msg.rpc_resp = &calldata->res; |
| calldata->clp = clp; |
| task_setup_data.callback_data = calldata; |
| |
| return rpc_run_task(&task_setup_data); |
| } |
| |
| static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) |
| { |
| struct rpc_task *task; |
| int ret = 0; |
| |
| if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) |
| return -EAGAIN; |
| task = _nfs41_proc_sequence(clp, cred, false); |
| if (IS_ERR(task)) |
| ret = PTR_ERR(task); |
| else |
| rpc_put_task_async(task); |
| dprintk("<-- %s status=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
| { |
| struct rpc_task *task; |
| int ret; |
| |
| task = _nfs41_proc_sequence(clp, cred, true); |
| if (IS_ERR(task)) { |
| ret = PTR_ERR(task); |
| goto out; |
| } |
| ret = rpc_wait_for_completion_task(task); |
| if (!ret) |
| ret = task->tk_status; |
| rpc_put_task(task); |
| out: |
| dprintk("<-- %s status=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| struct nfs4_reclaim_complete_data { |
| struct nfs_client *clp; |
| struct nfs41_reclaim_complete_args arg; |
| struct nfs41_reclaim_complete_res res; |
| }; |
| |
| static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs4_reclaim_complete_data *calldata = data; |
| |
| nfs41_setup_sequence(calldata->clp->cl_session, |
| &calldata->arg.seq_args, |
| &calldata->res.seq_res, |
| task); |
| } |
| |
| static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
| { |
| switch(task->tk_status) { |
| case 0: |
| case -NFS4ERR_COMPLETE_ALREADY: |
| case -NFS4ERR_WRONG_CRED: /* What to do here? */ |
| break; |
| case -NFS4ERR_DELAY: |
| rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| /* fall through */ |
| case -NFS4ERR_RETRY_UNCACHED_REP: |
| return -EAGAIN; |
| default: |
| nfs4_schedule_lease_recovery(clp); |
| } |
| return 0; |
| } |
| |
| static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) |
| { |
| struct nfs4_reclaim_complete_data *calldata = data; |
| struct nfs_client *clp = calldata->clp; |
| struct nfs4_sequence_res *res = &calldata->res.seq_res; |
| |
| dprintk("--> %s\n", __func__); |
| if (!nfs41_sequence_done(task, res)) |
| return; |
| |
| trace_nfs4_reclaim_complete(clp, task->tk_status); |
| if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static void nfs4_free_reclaim_complete_data(void *data) |
| { |
| struct nfs4_reclaim_complete_data *calldata = data; |
| |
| kfree(calldata); |
| } |
| |
| static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { |
| .rpc_call_prepare = nfs4_reclaim_complete_prepare, |
| .rpc_call_done = nfs4_reclaim_complete_done, |
| .rpc_release = nfs4_free_reclaim_complete_data, |
| }; |
| |
| /* |
| * Issue a global reclaim complete. |
| */ |
| static int nfs41_proc_reclaim_complete(struct nfs_client *clp, |
| struct rpc_cred *cred) |
| { |
| struct nfs4_reclaim_complete_data *calldata; |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], |
| .rpc_cred = cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = clp->cl_rpcclient, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_reclaim_complete_call_ops, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| int status = -ENOMEM; |
| |
| dprintk("--> %s\n", __func__); |
| calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
| if (calldata == NULL) |
| goto out; |
| calldata->clp = clp; |
| calldata->arg.one_fs = 0; |
| |
| nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); |
| nfs4_set_sequence_privileged(&calldata->arg.seq_args); |
| msg.rpc_argp = &calldata->arg; |
| msg.rpc_resp = &calldata->res; |
| task_setup_data.callback_data = calldata; |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) { |
| status = PTR_ERR(task); |
| goto out; |
| } |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status == 0) |
| status = task->tk_status; |
| rpc_put_task(task); |
| return 0; |
| out: |
| dprintk("<-- %s status=%d\n", __func__, status); |
| return status; |
| } |
| |
| static void |
| nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutget *lgp = calldata; |
| struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
| struct nfs4_session *session = nfs4_get_session(server); |
| |
| dprintk("--> %s\n", __func__); |
| /* Note the is a race here, where a CB_LAYOUTRECALL can come in |
| * right now covering the LAYOUTGET we are about to send. |
| * However, that is not so catastrophic, and there seems |
| * to be no way to prevent it completely. |
| */ |
| if (nfs41_setup_sequence(session, &lgp->args.seq_args, |
| &lgp->res.seq_res, task)) |
| return; |
| if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, |
| NFS_I(lgp->args.inode)->layout, |
| &lgp->args.range, |
| lgp->args.ctx->state)) { |
| rpc_exit(task, NFS4_OK); |
| } |
| } |
| |
| static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutget *lgp = calldata; |
| struct inode *inode = lgp->args.inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct pnfs_layout_hdr *lo; |
| struct nfs4_state *state = NULL; |
| unsigned long timeo, now, giveup; |
| |
| dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); |
| |
| if (!nfs41_sequence_done(task, &lgp->res.seq_res)) |
| goto out; |
| |
| switch (task->tk_status) { |
| case 0: |
| goto out; |
| /* |
| * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of |
| * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). |
| */ |
| case -NFS4ERR_BADLAYOUT: |
| goto out_overflow; |
| /* |
| * NFS4ERR_LAYOUTTRYLATER is a conflict with another client |
| * (or clients) writing to the same RAID stripe except when |
| * the minlength argument is 0 (see RFC5661 section 18.43.3). |
| */ |
| case -NFS4ERR_LAYOUTTRYLATER: |
| if (lgp->args.minlength == 0) |
| goto out_overflow; |
| /* |
| * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall |
| * existing layout before getting a new one). |
| */ |
| case -NFS4ERR_RECALLCONFLICT: |
| timeo = rpc_get_timeout(task->tk_client); |
| giveup = lgp->args.timestamp + timeo; |
| now = jiffies; |
| if (time_after(giveup, now)) { |
| unsigned long delay; |
| |
| /* Delay for: |
| * - Not less then NFS4_POLL_RETRY_MIN. |
| * - One last time a jiffie before we give up |
| * - exponential backoff (time_now minus start_attempt) |
| */ |
| delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN, |
| min((giveup - now - 1), |
| now - lgp->args.timestamp)); |
| |
| dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n", |
| __func__, delay); |
| rpc_delay(task, delay); |
| /* Do not call nfs4_async_handle_error() */ |
| goto out_restart; |
| } |
| break; |
| case -NFS4ERR_EXPIRED: |
| case -NFS4ERR_BAD_STATEID: |
| spin_lock(&inode->i_lock); |
| if (nfs4_stateid_match(&lgp->args.stateid, |
| &lgp->args.ctx->state->stateid)) { |
| spin_unlock(&inode->i_lock); |
| /* If the open stateid was bad, then recover it. */ |
| state = lgp->args.ctx->state; |
| break; |
| } |
| lo = NFS_I(inode)->layout; |
| if (lo && nfs4_stateid_match(&lgp->args.stateid, |
| &lo->plh_stateid)) { |
| LIST_HEAD(head); |
| |
| /* |
| * Mark the bad layout state as invalid, then retry |
| * with the current stateid. |
| */ |
| set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); |
| pnfs_mark_matching_lsegs_invalid(lo, &head, NULL); |
| spin_unlock(&inode->i_lock); |
| pnfs_free_lseg_list(&head); |
| } else |
| spin_unlock(&inode->i_lock); |
| goto out_restart; |
| } |
| if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) |
| goto out_restart; |
| out: |
| dprintk("<-- %s\n", __func__); |
| return; |
| out_restart: |
| task->tk_status = 0; |
| rpc_restart_call_prepare(task); |
| return; |
| out_overflow: |
| task->tk_status = -EOVERFLOW; |
| goto out; |
| } |
| |
| static size_t max_response_pages(struct nfs_server *server) |
| { |
| u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; |
| return nfs_page_array_len(0, max_resp_sz); |
| } |
| |
| static void nfs4_free_pages(struct page **pages, size_t size) |
| { |
| int i; |
| |
| if (!pages) |
| return; |
| |
| for (i = 0; i < size; i++) { |
| if (!pages[i]) |
| break; |
| __free_page(pages[i]); |
| } |
| kfree(pages); |
| } |
| |
| static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) |
| { |
| struct page **pages; |
| int i; |
| |
| pages = kcalloc(size, sizeof(struct page *), gfp_flags); |
| if (!pages) { |
| dprintk("%s: can't alloc array of %zu pages\n", __func__, size); |
| return NULL; |
| } |
| |
| for (i = 0; i < size; i++) { |
| pages[i] = alloc_page(gfp_flags); |
| if (!pages[i]) { |
| dprintk("%s: failed to allocate page\n", __func__); |
| nfs4_free_pages(pages, size); |
| return NULL; |
| } |
| } |
| |
| return pages; |
| } |
| |
| static void nfs4_layoutget_release(void *calldata) |
| { |
| struct nfs4_layoutget *lgp = calldata; |
| struct inode *inode = lgp->args.inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| size_t max_pages = max_response_pages(server); |
| |
| dprintk("--> %s\n", __func__); |
| nfs4_free_pages(lgp->args.layout.pages, max_pages); |
| pnfs_put_layout_hdr(NFS_I(inode)->layout); |
| put_nfs_open_context(lgp->args.ctx); |
| kfree(calldata); |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static const struct rpc_call_ops nfs4_layoutget_call_ops = { |
| .rpc_call_prepare = nfs4_layoutget_prepare, |
| .rpc_call_done = nfs4_layoutget_done, |
| .rpc_release = nfs4_layoutget_release, |
| }; |
| |
| struct pnfs_layout_segment * |
| nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags) |
| { |
| struct inode *inode = lgp->args.inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| size_t max_pages = max_response_pages(server); |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], |
| .rpc_argp = &lgp->args, |
| .rpc_resp = &lgp->res, |
| .rpc_cred = lgp->cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_layoutget_call_ops, |
| .callback_data = lgp, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| struct pnfs_layout_segment *lseg = NULL; |
| int status = 0; |
| |
| dprintk("--> %s\n", __func__); |
| |
| /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ |
| pnfs_get_layout_hdr(NFS_I(inode)->layout); |
| |
| lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); |
| if (!lgp->args.layout.pages) { |
| nfs4_layoutget_release(lgp); |
| return ERR_PTR(-ENOMEM); |
| } |
| lgp->args.layout.pglen = max_pages * PAGE_SIZE; |
| lgp->args.timestamp = jiffies; |
| |
| lgp->res.layoutp = &lgp->args.layout; |
| lgp->res.seq_res.sr_slot = NULL; |
| nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); |
| |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return ERR_CAST(task); |
| status = nfs4_wait_for_completion_rpc_task(task); |
| if (status == 0) |
| status = task->tk_status; |
| trace_nfs4_layoutget(lgp->args.ctx, |
| &lgp->args.range, |
| &lgp->res.range, |
| status); |
| /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */ |
| if (status == 0 && lgp->res.layoutp->len) |
| lseg = pnfs_layout_process(lgp); |
| rpc_put_task(task); |
| dprintk("<-- %s status=%d\n", __func__, status); |
| if (status) |
| return ERR_PTR(status); |
| return lseg; |
| } |
| |
| static void |
| nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutreturn *lrp = calldata; |
| |
| dprintk("--> %s\n", __func__); |
| nfs41_setup_sequence(lrp->clp->cl_session, |
| &lrp->args.seq_args, |
| &lrp->res.seq_res, |
| task); |
| } |
| |
| static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutreturn *lrp = calldata; |
| struct nfs_server *server; |
| |
| dprintk("--> %s\n", __func__); |
| |
| if (!nfs41_sequence_done(task, &lrp->res.seq_res)) |
| return; |
| |
| server = NFS_SERVER(lrp->args.inode); |
| switch (task->tk_status) { |
| default: |
| task->tk_status = 0; |
| case 0: |
| break; |
| case -NFS4ERR_DELAY: |
| if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) |
| break; |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static void nfs4_layoutreturn_release(void *calldata) |
| { |
| struct nfs4_layoutreturn *lrp = calldata; |
| struct pnfs_layout_hdr *lo = lrp->args.layout; |
| LIST_HEAD(freeme); |
| |
| dprintk("--> %s\n", __func__); |
| spin_lock(&lo->plh_inode->i_lock); |
| if (lrp->res.lrs_present) |
| pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); |
| pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range); |
| pnfs_clear_layoutreturn_waitbit(lo); |
| lo->plh_block_lgets--; |
| spin_unlock(&lo->plh_inode->i_lock); |
| pnfs_free_lseg_list(&freeme); |
| pnfs_put_layout_hdr(lrp->args.layout); |
| nfs_iput_and_deactive(lrp->inode); |
| kfree(calldata); |
| dprintk("<-- %s\n", __func__); |
| } |
| |
| static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { |
| .rpc_call_prepare = nfs4_layoutreturn_prepare, |
| .rpc_call_done = nfs4_layoutreturn_done, |
| .rpc_release = nfs4_layoutreturn_release, |
| }; |
| |
| int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) |
| { |
| struct rpc_task *task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], |
| .rpc_argp = &lrp->args, |
| .rpc_resp = &lrp->res, |
| .rpc_cred = lrp->cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .rpc_client = NFS_SERVER(lrp->args.inode)->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_layoutreturn_call_ops, |
| .callback_data = lrp, |
| }; |
| int status = 0; |
| |
| dprintk("--> %s\n", __func__); |
| if (!sync) { |
| lrp->inode = nfs_igrab_and_active(lrp->args.inode); |
| if (!lrp->inode) { |
| nfs4_layoutreturn_release(lrp); |
| return -EAGAIN; |
| } |
| task_setup_data.flags |= RPC_TASK_ASYNC; |
| } |
| nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| if (sync) |
| status = task->tk_status; |
| trace_nfs4_layoutreturn(lrp->args.inode, status); |
| dprintk("<-- %s status=%d\n", __func__, status); |
| rpc_put_task(task); |
| return status; |
| } |
| |
| static int |
| _nfs4_proc_getdeviceinfo(struct nfs_server *server, |
| struct pnfs_device *pdev, |
| struct rpc_cred *cred) |
| { |
| struct nfs4_getdeviceinfo_args args = { |
| .pdev = pdev, |
| .notify_types = NOTIFY_DEVICEID4_CHANGE | |
| NOTIFY_DEVICEID4_DELETE, |
| }; |
| struct nfs4_getdeviceinfo_res res = { |
| .pdev = pdev, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| dprintk("--> %s\n", __func__); |
| status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
| if (res.notification & ~args.notify_types) |
| dprintk("%s: unsupported notification\n", __func__); |
| if (res.notification != args.notify_types) |
| pdev->nocache = 1; |
| |
| dprintk("<-- %s status=%d\n", __func__, status); |
| |
| return status; |
| } |
| |
| int nfs4_proc_getdeviceinfo(struct nfs_server *server, |
| struct pnfs_device *pdev, |
| struct rpc_cred *cred) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_proc_getdeviceinfo(server, pdev, cred), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); |
| |
| static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutcommit_data *data = calldata; |
| struct nfs_server *server = NFS_SERVER(data->args.inode); |
| struct nfs4_session *session = nfs4_get_session(server); |
| |
| nfs41_setup_sequence(session, |
| &data->args.seq_args, |
| &data->res.seq_res, |
| task); |
| } |
| |
| static void |
| nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs4_layoutcommit_data *data = calldata; |
| struct nfs_server *server = NFS_SERVER(data->args.inode); |
| |
| if (!nfs41_sequence_done(task, &data->res.seq_res)) |
| return; |
| |
| switch (task->tk_status) { /* Just ignore these failures */ |
| case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ |
| case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ |
| case -NFS4ERR_BADLAYOUT: /* no layout */ |
| case -NFS4ERR_GRACE: /* loca_recalim always false */ |
| task->tk_status = 0; |
| case 0: |
| break; |
| default: |
| if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { |
| rpc_restart_call_prepare(task); |
| return; |
| } |
| } |
| } |
| |
| static void nfs4_layoutcommit_release(void *calldata) |
| { |
| struct nfs4_layoutcommit_data *data = calldata; |
| |
| pnfs_cleanup_layoutcommit(data); |
| nfs_post_op_update_inode_force_wcc(data->args.inode, |
| data->res.fattr); |
| put_rpccred(data->cred); |
| nfs_iput_and_deactive(data->inode); |
| kfree(data); |
| } |
| |
| static const struct rpc_call_ops nfs4_layoutcommit_ops = { |
| .rpc_call_prepare = nfs4_layoutcommit_prepare, |
| .rpc_call_done = nfs4_layoutcommit_done, |
| .rpc_release = nfs4_layoutcommit_release, |
| }; |
| |
| int |
| nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], |
| .rpc_argp = &data->args, |
| .rpc_resp = &data->res, |
| .rpc_cred = data->cred, |
| }; |
| struct rpc_task_setup task_setup_data = { |
| .task = &data->task, |
| .rpc_client = NFS_CLIENT(data->args.inode), |
| .rpc_message = &msg, |
| .callback_ops = &nfs4_layoutcommit_ops, |
| .callback_data = data, |
| }; |
| struct rpc_task *task; |
| int status = 0; |
| |
| dprintk("NFS: initiating layoutcommit call. sync %d " |
| "lbw: %llu inode %lu\n", sync, |
| data->args.lastbytewritten, |
| data->args.inode->i_ino); |
| |
| if (!sync) { |
| data->inode = nfs_igrab_and_active(data->args.inode); |
| if (data->inode == NULL) { |
| nfs4_layoutcommit_release(data); |
| return -EAGAIN; |
| } |
| task_setup_data.flags = RPC_TASK_ASYNC; |
| } |
| nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); |
| task = rpc_run_task(&task_setup_data); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| if (sync) |
| status = task->tk_status; |
| trace_nfs4_layoutcommit(data->args.inode, status); |
| dprintk("%s: status %d\n", __func__, status); |
| rpc_put_task(task); |
| return status; |
| } |
| |
| /** |
| * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if |
| * possible) as per RFC3530bis and RFC5661 Security Considerations sections |
| */ |
| static int |
| _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info, |
| struct nfs4_secinfo_flavors *flavors, bool use_integrity) |
| { |
| struct nfs41_secinfo_no_name_args args = { |
| .style = SECINFO_STYLE_CURRENT_FH, |
| }; |
| struct nfs4_secinfo_res res = { |
| .flavors = flavors, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| struct rpc_clnt *clnt = server->client; |
| struct rpc_cred *cred = NULL; |
| int status; |
| |
| if (use_integrity) { |
| clnt = server->nfs_client->cl_rpcclient; |
| cred = nfs4_get_clid_cred(server->nfs_client); |
| msg.rpc_cred = cred; |
| } |
| |
| dprintk("--> %s\n", __func__); |
| status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, |
| &res.seq_res, 0); |
| dprintk("<-- %s status=%d\n", __func__, status); |
| |
| if (cred) |
| put_rpccred(cred); |
| |
| return status; |
| } |
| |
| static int |
| nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| /* first try using integrity protection */ |
| err = -NFS4ERR_WRONGSEC; |
| |
| /* try to use integrity protection with machine cred */ |
| if (_nfs4_is_integrity_protected(server->nfs_client)) |
| err = _nfs41_proc_secinfo_no_name(server, fhandle, info, |
| flavors, true); |
| |
| /* |
| * if unable to use integrity protection, or SECINFO with |
| * integrity protection returns NFS4ERR_WRONGSEC (which is |
| * disallowed by spec, but exists in deployed servers) use |
| * the current filesystem's rpc_client and the user cred. |
| */ |
| if (err == -NFS4ERR_WRONGSEC) |
| err = _nfs41_proc_secinfo_no_name(server, fhandle, info, |
| flavors, false); |
| |
| switch (err) { |
| case 0: |
| case -NFS4ERR_WRONGSEC: |
| case -ENOTSUPP: |
| goto out; |
| default: |
| err = nfs4_handle_exception(server, err, &exception); |
| } |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| static int |
| nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| int err; |
| struct page *page; |
| rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; |
| struct nfs4_secinfo_flavors *flavors; |
| struct nfs4_secinfo4 *secinfo; |
| int i; |
| |
| page = alloc_page(GFP_KERNEL); |
| if (!page) { |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| flavors = page_address(page); |
| err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); |
| |
| /* |
| * Fall back on "guess and check" method if |
| * the server doesn't support SECINFO_NO_NAME |
| */ |
| if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { |
| err = nfs4_find_root_sec(server, fhandle, info); |
| goto out_freepage; |
| } |
| if (err) |
| goto out_freepage; |
| |
| for (i = 0; i < flavors->num_flavors; i++) { |
| secinfo = &flavors->flavors[i]; |
| |
| switch (secinfo->flavor) { |
| case RPC_AUTH_NULL: |
| case RPC_AUTH_UNIX: |
| case RPC_AUTH_GSS: |
| flavor = rpcauth_get_pseudoflavor(secinfo->flavor, |
| &secinfo->flavor_info); |
| break; |
| default: |
| flavor = RPC_AUTH_MAXFLAVOR; |
| break; |
| } |
| |
| if (!nfs_auth_info_match(&server->auth_info, flavor)) |
| flavor = RPC_AUTH_MAXFLAVOR; |
| |
| if (flavor != RPC_AUTH_MAXFLAVOR) { |
| err = nfs4_lookup_root_sec(server, fhandle, |
| info, flavor); |
| if (!err) |
| break; |
| } |
| } |
| |
| if (flavor == RPC_AUTH_MAXFLAVOR) |
| err = -EPERM; |
| |
| out_freepage: |
| put_page(page); |
| if (err == -EACCES) |
| return -EPERM; |
| out: |
| return err; |
| } |
| |
| static int _nfs41_test_stateid(struct nfs_server *server, |
| nfs4_stateid *stateid, |
| struct rpc_cred *cred) |
| { |
| int status; |
| struct nfs41_test_stateid_args args = { |
| .stateid = stateid, |
| }; |
| struct nfs41_test_stateid_res res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| struct rpc_clnt *rpc_client = server->client; |
| |
| nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, |
| &rpc_client, &msg); |
| |
| dprintk("NFS call test_stateid %p\n", stateid); |
| nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); |
| nfs4_set_sequence_privileged(&args.seq_args); |
| status = nfs4_call_sync_sequence(rpc_client, server, &msg, |
| &args.seq_args, &res.seq_res); |
| if (status != NFS_OK) { |
| dprintk("NFS reply test_stateid: failed, %d\n", status); |
| return status; |
| } |
| dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); |
| return -res.status; |
| } |
| |
| /** |
| * nfs41_test_stateid - perform a TEST_STATEID operation |
| * |
| * @server: server / transport on which to perform the operation |
| * @stateid: state ID to test |
| * @cred: credential |
| * |
| * Returns NFS_OK if the server recognizes that "stateid" is valid. |
| * Otherwise a negative NFS4ERR value is returned if the operation |
| * failed or the state ID is not currently valid. |
| */ |
| static int nfs41_test_stateid(struct nfs_server *server, |
| nfs4_stateid *stateid, |
| struct rpc_cred *cred) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs41_test_stateid(server, stateid, cred); |
| if (err != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| struct nfs_free_stateid_data { |
| struct nfs_server *server; |
| struct nfs41_free_stateid_args args; |
| struct nfs41_free_stateid_res res; |
| }; |
| |
| static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) |
| { |
| struct nfs_free_stateid_data *data = calldata; |
| nfs41_setup_sequence(nfs4_get_session(data->server), |
| &data->args.seq_args, |
| &data->res.seq_res, |
| task); |
| } |
| |
| static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs_free_stateid_data *data = calldata; |
| |
| nfs41_sequence_done(task, &data->res.seq_res); |
| |
| switch (task->tk_status) { |
| case -NFS4ERR_DELAY: |
| if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) |
| rpc_restart_call_prepare(task); |
| } |
| } |
| |
| static void nfs41_free_stateid_release(void *calldata) |
| { |
| kfree(calldata); |
| } |
| |
| static const struct rpc_call_ops nfs41_free_stateid_ops = { |
| .rpc_call_prepare = nfs41_free_stateid_prepare, |
| .rpc_call_done = nfs41_free_stateid_done, |
| .rpc_release = nfs41_free_stateid_release, |
| }; |
| |
| static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server, |
| nfs4_stateid *stateid, |
| struct rpc_cred *cred, |
| bool privileged) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], |
| .rpc_cred = cred, |
| }; |
| struct rpc_task_setup task_setup = { |
| .rpc_client = server->client, |
| .rpc_message = &msg, |
| .callback_ops = &nfs41_free_stateid_ops, |
| .flags = RPC_TASK_ASYNC, |
| }; |
| struct nfs_free_stateid_data *data; |
| |
| nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, |
| &task_setup.rpc_client, &msg); |
| |
| dprintk("NFS call free_stateid %p\n", stateid); |
| data = kmalloc(sizeof(*data), GFP_NOFS); |
| if (!data) |
| return ERR_PTR(-ENOMEM); |
| data->server = server; |
| nfs4_stateid_copy(&data->args.stateid, stateid); |
| |
| task_setup.callback_data = data; |
| |
| msg.rpc_argp = &data->args; |
| msg.rpc_resp = &data->res; |
| nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); |
| if (privileged) |
| nfs4_set_sequence_privileged(&data->args.seq_args); |
| |
| return rpc_run_task(&task_setup); |
| } |
| |
| /** |
| * nfs41_free_stateid - perform a FREE_STATEID operation |
| * |
| * @server: server / transport on which to perform the operation |
| * @stateid: state ID to release |
| * @cred: credential |
| * |
| * Returns NFS_OK if the server freed "stateid". Otherwise a |
| * negative NFS4ERR value is returned. |
| */ |
| static int nfs41_free_stateid(struct nfs_server *server, |
| nfs4_stateid *stateid, |
| struct rpc_cred *cred) |
| { |
| struct rpc_task *task; |
| int ret; |
| |
| task = _nfs41_free_stateid(server, stateid, cred, true); |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| ret = rpc_wait_for_completion_task(task); |
| if (!ret) |
| ret = task->tk_status; |
| rpc_put_task(task); |
| return ret; |
| } |
| |
| static void |
| nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
| { |
| struct rpc_task *task; |
| struct rpc_cred *cred = lsp->ls_state->owner->so_cred; |
| |
| task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); |
| nfs4_free_lock_state(server, lsp); |
| if (IS_ERR(task)) |
| return; |
| rpc_put_task(task); |
| } |
| |
| static bool nfs41_match_stateid(const nfs4_stateid *s1, |
| const nfs4_stateid *s2) |
| { |
| if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) |
| return false; |
| |
| if (s1->seqid == s2->seqid) |
| return true; |
| if (s1->seqid == 0 || s2->seqid == 0) |
| return true; |
| |
| return false; |
| } |
| |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| static bool nfs4_match_stateid(const nfs4_stateid *s1, |
| const nfs4_stateid *s2) |
| { |
| return nfs4_stateid_match(s1, s2); |
| } |
| |
| |
| static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { |
| .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
| .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
| .recover_open = nfs4_open_reclaim, |
| .recover_lock = nfs4_lock_reclaim, |
| .establish_clid = nfs4_init_clientid, |
| .detect_trunking = nfs40_discover_server_trunking, |
| }; |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { |
| .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
| .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
| .recover_open = nfs4_open_reclaim, |
| .recover_lock = nfs4_lock_reclaim, |
| .establish_clid = nfs41_init_clientid, |
| .reclaim_complete = nfs41_proc_reclaim_complete, |
| .detect_trunking = nfs41_discover_server_trunking, |
| }; |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { |
| .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
| .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
| .recover_open = nfs40_open_expired, |
| .recover_lock = nfs4_lock_expired, |
| .establish_clid = nfs4_init_clientid, |
| }; |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { |
| .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
| .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
| .recover_open = nfs41_open_expired, |
| .recover_lock = nfs41_lock_expired, |
| .establish_clid = nfs41_init_clientid, |
| }; |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { |
| .sched_state_renewal = nfs4_proc_async_renew, |
| .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, |
| .renew_lease = nfs4_proc_renew, |
| }; |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { |
| .sched_state_renewal = nfs41_proc_async_sequence, |
| .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, |
| .renew_lease = nfs4_proc_sequence, |
| }; |
| #endif |
| |
| static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { |
| .get_locations = _nfs40_proc_get_locations, |
| .fsid_present = _nfs40_proc_fsid_present, |
| }; |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { |
| .get_locations = _nfs41_proc_get_locations, |
| .fsid_present = _nfs41_proc_fsid_present, |
| }; |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { |
| .minor_version = 0, |
| .init_caps = NFS_CAP_READDIRPLUS |
| | NFS_CAP_ATOMIC_OPEN |
| | NFS_CAP_POSIX_LOCK, |
| .init_client = nfs40_init_client, |
| .shutdown_client = nfs40_shutdown_client, |
| .match_stateid = nfs4_match_stateid, |
| .find_root_sec = nfs4_find_root_sec, |
| .free_lock_state = nfs4_release_lockowner, |
| .alloc_seqid = nfs_alloc_seqid, |
| .call_sync_ops = &nfs40_call_sync_ops, |
| .reboot_recovery_ops = &nfs40_reboot_recovery_ops, |
| .nograce_recovery_ops = &nfs40_nograce_recovery_ops, |
| .state_renewal_ops = &nfs40_state_renewal_ops, |
| .mig_recovery_ops = &nfs40_mig_recovery_ops, |
| }; |
| |
| #if defined(CONFIG_NFS_V4_1) |
| static struct nfs_seqid * |
| nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) |
| { |
| return NULL; |
| } |
| |
| static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { |
| .minor_version = 1, |
| .init_caps = NFS_CAP_READDIRPLUS |
| | NFS_CAP_ATOMIC_OPEN |
| | NFS_CAP_POSIX_LOCK |
| | NFS_CAP_STATEID_NFSV41 |
| | NFS_CAP_ATOMIC_OPEN_V1, |
| .init_client = nfs41_init_client, |
| .shutdown_client = nfs41_shutdown_client, |
| .match_stateid = nfs41_match_stateid, |
| .find_root_sec = nfs41_find_root_sec, |
| .free_lock_state = nfs41_free_lock_state, |
| .alloc_seqid = nfs_alloc_no_seqid, |
| .call_sync_ops = &nfs41_call_sync_ops, |
| .reboot_recovery_ops = &nfs41_reboot_recovery_ops, |
| .nograce_recovery_ops = &nfs41_nograce_recovery_ops, |
| .state_renewal_ops = &nfs41_state_renewal_ops, |
| .mig_recovery_ops = &nfs41_mig_recovery_ops, |
| }; |
| #endif |
| |
| #if defined(CONFIG_NFS_V4_2) |
| static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { |
| .minor_version = 2, |
| .init_caps = NFS_CAP_READDIRPLUS |
| | NFS_CAP_ATOMIC_OPEN |
| | NFS_CAP_POSIX_LOCK |
| | NFS_CAP_STATEID_NFSV41 |
| | NFS_CAP_ATOMIC_OPEN_V1 |
| | NFS_CAP_ALLOCATE |
| | NFS_CAP_DEALLOCATE |
| | NFS_CAP_SEEK |
| | NFS_CAP_LAYOUTSTATS, |
| .init_client = nfs41_init_client, |
| .shutdown_client = nfs41_shutdown_client, |
| .match_stateid = nfs41_match_stateid, |
| .find_root_sec = nfs41_find_root_sec, |
| .free_lock_state = nfs41_free_lock_state, |
| .call_sync_ops = &nfs41_call_sync_ops, |
| .alloc_seqid = nfs_alloc_no_seqid, |
| .reboot_recovery_ops = &nfs41_reboot_recovery_ops, |
| .nograce_recovery_ops = &nfs41_nograce_recovery_ops, |
| .state_renewal_ops = &nfs41_state_renewal_ops, |
| .mig_recovery_ops = &nfs41_mig_recovery_ops, |
| }; |
| #endif |
| |
| const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { |
| [0] = &nfs_v4_0_minor_ops, |
| #if defined(CONFIG_NFS_V4_1) |
| [1] = &nfs_v4_1_minor_ops, |
| #endif |
| #if defined(CONFIG_NFS_V4_2) |
| [2] = &nfs_v4_2_minor_ops, |
| #endif |
| }; |
| |
| static const struct inode_operations nfs4_dir_inode_operations = { |
| .create = nfs_create, |
| .lookup = nfs_lookup, |
| .atomic_open = nfs_atomic_open, |
| .link = nfs_link, |
| .unlink = nfs_unlink, |
| .symlink = nfs_symlink, |
| .mkdir = nfs_mkdir, |
| .rmdir = nfs_rmdir, |
| .mknod = nfs_mknod, |
| .rename = nfs_rename, |
| .permission = nfs_permission, |
| .getattr = nfs_getattr, |
| .setattr = nfs_setattr, |
| .getxattr = generic_getxattr, |
| .setxattr = generic_setxattr, |
| .listxattr = generic_listxattr, |
| .removexattr = generic_removexattr, |
| }; |
| |
| static const struct inode_operations nfs4_file_inode_operations = { |
| .permission = nfs_permission, |
| .getattr = nfs_getattr, |
| .setattr = nfs_setattr, |
| .getxattr = generic_getxattr, |
| .setxattr = generic_setxattr, |
| .listxattr = generic_listxattr, |
| .removexattr = generic_removexattr, |
| }; |
| |
| const struct nfs_rpc_ops nfs_v4_clientops = { |
| .version = 4, /* protocol version */ |
| .dentry_ops = &nfs4_dentry_operations, |
| .dir_inode_ops = &nfs4_dir_inode_operations, |
| .file_inode_ops = &nfs4_file_inode_operations, |
| .file_ops = &nfs4_file_operations, |
| .getroot = nfs4_proc_get_root, |
| .submount = nfs4_submount, |
| .try_mount = nfs4_try_mount, |
| .getattr = nfs4_proc_getattr, |
| .setattr = nfs4_proc_setattr, |
| .lookup = nfs4_proc_lookup, |
| .access = nfs4_proc_access, |
| .readlink = nfs4_proc_readlink, |
| .create = nfs4_proc_create, |
| .remove = nfs4_proc_remove, |
| .unlink_setup = nfs4_proc_unlink_setup, |
| .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, |
| .unlink_done = nfs4_proc_unlink_done, |
| .rename_setup = nfs4_proc_rename_setup, |
| .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, |
| .rename_done = nfs4_proc_rename_done, |
| .link = nfs4_proc_link, |
| .symlink = nfs4_proc_symlink, |
| .mkdir = nfs4_proc_mkdir, |
| .rmdir = nfs4_proc_remove, |
| .readdir = nfs4_proc_readdir, |
| .mknod = nfs4_proc_mknod, |
| .statfs = nfs4_proc_statfs, |
| .fsinfo = nfs4_proc_fsinfo, |
| .pathconf = nfs4_proc_pathconf, |
| .set_capabilities = nfs4_server_capabilities, |
| .decode_dirent = nfs4_decode_dirent, |
| .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, |
| .read_setup = nfs4_proc_read_setup, |
| .read_done = nfs4_read_done, |
| .write_setup = nfs4_proc_write_setup, |
| .write_done = nfs4_write_done, |
| .commit_setup = nfs4_proc_commit_setup, |
| .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, |
| .commit_done = nfs4_commit_done, |
| .lock = nfs4_proc_lock, |
| .clear_acl_cache = nfs4_zap_acl_attr, |
| .close_context = nfs4_close_context, |
| .open_context = nfs4_atomic_open, |
| .have_delegation = nfs4_have_delegation, |
| .return_delegation = nfs4_inode_return_delegation, |
| .alloc_client = nfs4_alloc_client, |
| .init_client = nfs4_init_client, |
| .free_client = nfs4_free_client, |
| .create_server = nfs4_create_server, |
| .clone_server = nfs_clone_server, |
| }; |
| |
| static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { |
| .prefix = XATTR_NAME_NFSV4_ACL, |
| .list = nfs4_xattr_list_nfs4_acl, |
| .get = nfs4_xattr_get_nfs4_acl, |
| .set = nfs4_xattr_set_nfs4_acl, |
| }; |
| |
| const struct xattr_handler *nfs4_xattr_handlers[] = { |
| &nfs4_xattr_nfs4_acl_handler, |
| #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
| &nfs4_xattr_nfs4_label_handler, |
| #endif |
| NULL |
| }; |
| |
| /* |
| * Local variables: |
| * c-basic-offset: 8 |
| * End: |
| */ |