| /* |
| * 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/utsname.h> |
| #include <linux/delay.h> |
| #include <linux/errno.h> |
| #include <linux/string.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/smp_lock.h> |
| #include <linux/namei.h> |
| #include <linux/mount.h> |
| |
| #include "nfs4_fs.h" |
| #include "delegation.h" |
| |
| #define NFSDBG_FACILITY NFSDBG_PROC |
| |
| #define NFS4_POLL_RETRY_MIN (1*HZ) |
| #define NFS4_POLL_RETRY_MAX (15*HZ) |
| |
| static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid); |
| 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 *); |
| static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); |
| static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); |
| extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); |
| extern struct rpc_procinfo nfs4_procedures[]; |
| |
| /* Prevent leaks of NFSv4 errors into userland */ |
| int nfs4_map_errors(int err) |
| { |
| if (err < -1000) { |
| dprintk("%s could not handle NFSv4 error %d\n", |
| __FUNCTION__, -err); |
| return -EIO; |
| } |
| return err; |
| } |
| |
| /* |
| * This is our standard bitmap for GETATTR requests. |
| */ |
| const u32 nfs4_fattr_bitmap[2] = { |
| 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 |
| }; |
| |
| const u32 nfs4_statfs_bitmap[2] = { |
| 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[2] = { |
| FATTR4_WORD0_MAXLINK |
| | FATTR4_WORD0_MAXNAME, |
| 0 |
| }; |
| |
| const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE |
| | FATTR4_WORD0_MAXREAD |
| | FATTR4_WORD0_MAXWRITE |
| | FATTR4_WORD0_LEASE_TIME, |
| 0 |
| }; |
| |
| static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry, |
| struct nfs4_readdir_arg *readdir) |
| { |
| u32 *start, *p; |
| |
| BUG_ON(readdir->count < 80); |
| 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 = (u32 *)kmap_atomic(*readdir->pages, KM_USER0); |
| |
| 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, dentry->d_inode->i_ino); |
| } |
| |
| *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, dentry->d_parent->d_inode->i_ino); |
| |
| readdir->pgbase = (char *)p - (char *)start; |
| readdir->count -= readdir->pgbase; |
| kunmap_atomic(start, KM_USER0); |
| } |
| |
| static void |
| renew_lease(struct nfs_server *server, unsigned long timestamp) |
| { |
| struct nfs4_client *clp = server->nfs4_state; |
| 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 update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo) |
| { |
| struct nfs_inode *nfsi = NFS_I(inode); |
| |
| spin_lock(&inode->i_lock); |
| nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
| if (cinfo->before == nfsi->change_attr && cinfo->atomic) |
| nfsi->change_attr = cinfo->after; |
| spin_unlock(&inode->i_lock); |
| } |
| |
| /* Helper for asynchronous RPC calls */ |
| static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin, |
| const struct rpc_call_ops *tk_ops, void *calldata) |
| { |
| struct rpc_task *task; |
| |
| if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata))) |
| return -ENOMEM; |
| task->tk_action = tk_begin; |
| rpc_execute(task); |
| return 0; |
| } |
| |
| static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) |
| { |
| struct inode *inode = state->inode; |
| |
| open_flags &= (FMODE_READ|FMODE_WRITE); |
| /* Protect against nfs4_find_state_byowner() */ |
| spin_lock(&state->owner->so_lock); |
| spin_lock(&inode->i_lock); |
| memcpy(&state->stateid, stateid, sizeof(state->stateid)); |
| if ((open_flags & FMODE_WRITE)) |
| state->nwriters++; |
| if (open_flags & FMODE_READ) |
| state->nreaders++; |
| nfs4_state_set_mode_locked(state, state->state | open_flags); |
| spin_unlock(&inode->i_lock); |
| spin_unlock(&state->owner->so_lock); |
| } |
| |
| /* |
| * OPEN_RECLAIM: |
| * reclaim state on the server after a reboot. |
| */ |
| static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| { |
| struct inode *inode = state->inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs_delegation *delegation = NFS_I(inode)->delegation; |
| struct nfs_openargs o_arg = { |
| .fh = NFS_FH(inode), |
| .id = sp->so_id, |
| .open_flags = state->state, |
| .clientid = server->nfs4_state->cl_clientid, |
| .claim = NFS4_OPEN_CLAIM_PREVIOUS, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs_openres o_res = { |
| .server = server, /* Grrr */ |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR], |
| .rpc_argp = &o_arg, |
| .rpc_resp = &o_res, |
| .rpc_cred = sp->so_cred, |
| }; |
| int status; |
| |
| if (delegation != NULL) { |
| if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { |
| memcpy(&state->stateid, &delegation->stateid, |
| sizeof(state->stateid)); |
| set_bit(NFS_DELEGATED_STATE, &state->flags); |
| return 0; |
| } |
| o_arg.u.delegation_type = delegation->type; |
| } |
| o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
| if (o_arg.seqid == NULL) |
| return -ENOMEM; |
| status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
| /* Confirm the sequence as being established */ |
| nfs_confirm_seqid(&sp->so_seqid, status); |
| nfs_increment_open_seqid(status, o_arg.seqid); |
| if (status == 0) { |
| memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid)); |
| if (o_res.delegation_type != 0) { |
| nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res); |
| /* Did the server issue an immediate delegation recall? */ |
| if (o_res.do_recall) |
| nfs_async_inode_return_delegation(inode, &o_res.stateid); |
| } |
| } |
| nfs_free_seqid(o_arg.seqid); |
| clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| /* Ensure we update the inode attributes */ |
| NFS_CACHEINV(inode); |
| return status; |
| } |
| |
| static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_open_reclaim(sp, state); |
| if (err != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) |
| { |
| struct nfs4_state_owner *sp = state->owner; |
| struct inode *inode = dentry->d_inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct dentry *parent = dget_parent(dentry); |
| struct nfs_openargs arg = { |
| .fh = NFS_FH(parent->d_inode), |
| .clientid = server->nfs4_state->cl_clientid, |
| .name = &dentry->d_name, |
| .id = sp->so_id, |
| .server = server, |
| .bitmask = server->attr_bitmask, |
| .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR, |
| }; |
| struct nfs_openres res = { |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| .rpc_cred = sp->so_cred, |
| }; |
| int status = 0; |
| |
| if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| goto out; |
| if (state->state == 0) |
| goto out; |
| arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
| status = -ENOMEM; |
| if (arg.seqid == NULL) |
| goto out; |
| arg.open_flags = state->state; |
| memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data)); |
| status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
| nfs_increment_open_seqid(status, arg.seqid); |
| if (status != 0) |
| goto out_free; |
| if(res.rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| status = _nfs4_proc_open_confirm(server->client, NFS_FH(inode), |
| sp, &res.stateid, arg.seqid); |
| if (status != 0) |
| goto out_free; |
| } |
| nfs_confirm_seqid(&sp->so_seqid, 0); |
| if (status >= 0) { |
| memcpy(state->stateid.data, res.stateid.data, |
| sizeof(state->stateid.data)); |
| clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| } |
| out_free: |
| nfs_free_seqid(arg.seqid); |
| out: |
| dput(parent); |
| return status; |
| } |
| |
| int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) |
| { |
| struct nfs4_exception exception = { }; |
| struct nfs_server *server = NFS_SERVER(dentry->d_inode); |
| int err; |
| do { |
| err = _nfs4_open_delegation_recall(dentry, state); |
| switch (err) { |
| case 0: |
| return err; |
| case -NFS4ERR_STALE_CLIENTID: |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| /* Don't recall a delegation if it was lost */ |
| nfs4_schedule_state_recovery(server->nfs4_state); |
| return err; |
| } |
| err = nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid) |
| { |
| struct nfs_open_confirmargs arg = { |
| .fh = fh, |
| .seqid = seqid, |
| .stateid = *stateid, |
| }; |
| struct nfs_open_confirmres res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| .rpc_cred = sp->so_cred, |
| }; |
| int status; |
| |
| status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR); |
| /* Confirm the sequence as being established */ |
| nfs_confirm_seqid(&sp->so_seqid, status); |
| nfs_increment_open_seqid(status, seqid); |
| if (status >= 0) |
| memcpy(stateid, &res.stateid, sizeof(*stateid)); |
| return status; |
| } |
| |
| static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner *sp, struct nfs_openargs *o_arg, struct nfs_openres *o_res) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], |
| .rpc_argp = o_arg, |
| .rpc_resp = o_res, |
| .rpc_cred = sp->so_cred, |
| }; |
| int status; |
| |
| /* Update sequence id. The caller must serialize! */ |
| o_arg->id = sp->so_id; |
| o_arg->clientid = sp->so_client->cl_clientid; |
| |
| status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
| if (status == 0) { |
| /* OPEN on anything except a regular file is disallowed in NFSv4 */ |
| switch (o_res->f_attr->mode & S_IFMT) { |
| case S_IFREG: |
| break; |
| case S_IFLNK: |
| status = -ELOOP; |
| break; |
| case S_IFDIR: |
| status = -EISDIR; |
| break; |
| default: |
| status = -ENOTDIR; |
| } |
| } |
| |
| nfs_increment_open_seqid(status, o_arg->seqid); |
| if (status != 0) |
| goto out; |
| if (o_arg->open_flags & O_CREAT) { |
| update_changeattr(dir, &o_res->cinfo); |
| nfs_post_op_update_inode(dir, o_res->dir_attr); |
| } else |
| nfs_refresh_inode(dir, o_res->dir_attr); |
| if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
| status = _nfs4_proc_open_confirm(server->client, &o_res->fh, |
| sp, &o_res->stateid, o_arg->seqid); |
| if (status != 0) |
| goto out; |
| } |
| nfs_confirm_seqid(&sp->so_seqid, 0); |
| if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
| status = server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); |
| out: |
| return status; |
| } |
| |
| static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) |
| { |
| struct nfs_access_entry cache; |
| int mask = 0; |
| int status; |
| |
| if (openflags & FMODE_READ) |
| mask |= MAY_READ; |
| if (openflags & FMODE_WRITE) |
| mask |= MAY_WRITE; |
| status = nfs_access_get_cached(inode, cred, &cache); |
| if (status == 0) |
| goto out; |
| |
| /* Be clever: ask server to check for all possible rights */ |
| cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; |
| cache.cred = cred; |
| cache.jiffies = jiffies; |
| status = _nfs4_proc_access(inode, &cache); |
| if (status != 0) |
| return status; |
| nfs_access_add_cache(inode, &cache); |
| out: |
| if ((cache.mask & mask) == mask) |
| return 0; |
| return -EACCES; |
| } |
| |
| /* |
| * OPEN_EXPIRED: |
| * reclaim state on the server after a network partition. |
| * Assumes caller holds the appropriate lock |
| */ |
| static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) |
| { |
| struct dentry *parent = dget_parent(dentry); |
| struct inode *dir = parent->d_inode; |
| struct inode *inode = state->inode; |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_delegation *delegation = NFS_I(inode)->delegation; |
| struct nfs_fattr f_attr, dir_attr; |
| struct nfs_openargs o_arg = { |
| .fh = NFS_FH(dir), |
| .open_flags = state->state, |
| .name = &dentry->d_name, |
| .bitmask = server->attr_bitmask, |
| .claim = NFS4_OPEN_CLAIM_NULL, |
| }; |
| struct nfs_openres o_res = { |
| .f_attr = &f_attr, |
| .dir_attr = &dir_attr, |
| .server = server, |
| }; |
| int status = 0; |
| |
| if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { |
| status = _nfs4_do_access(inode, sp->so_cred, state->state); |
| if (status < 0) |
| goto out; |
| memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); |
| set_bit(NFS_DELEGATED_STATE, &state->flags); |
| goto out; |
| } |
| o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
| status = -ENOMEM; |
| if (o_arg.seqid == NULL) |
| goto out; |
| nfs_fattr_init(&f_attr); |
| nfs_fattr_init(&dir_attr); |
| status = _nfs4_proc_open(dir, sp, &o_arg, &o_res); |
| if (status != 0) |
| goto out_nodeleg; |
| /* Check if files differ */ |
| if ((f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT)) |
| goto out_stale; |
| /* Has the file handle changed? */ |
| if (nfs_compare_fh(&o_res.fh, NFS_FH(inode)) != 0) { |
| /* Verify if the change attributes are the same */ |
| if (f_attr.change_attr != NFS_I(inode)->change_attr) |
| goto out_stale; |
| if (nfs_size_to_loff_t(f_attr.size) != inode->i_size) |
| goto out_stale; |
| /* Lets just pretend that this is the same file */ |
| nfs_copy_fh(NFS_FH(inode), &o_res.fh); |
| NFS_I(inode)->fileid = f_attr.fileid; |
| } |
| memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid)); |
| if (o_res.delegation_type != 0) { |
| if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) |
| nfs_inode_set_delegation(inode, sp->so_cred, &o_res); |
| else |
| nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res); |
| } |
| out_nodeleg: |
| nfs_free_seqid(o_arg.seqid); |
| clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| out: |
| dput(parent); |
| return status; |
| out_stale: |
| status = -ESTALE; |
| /* Invalidate the state owner so we don't ever use it again */ |
| nfs4_drop_state_owner(sp); |
| d_drop(dentry); |
| /* Should we be trying to close that stateid? */ |
| goto out_nodeleg; |
| } |
| |
| static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) |
| { |
| struct nfs_server *server = NFS_SERVER(dentry->d_inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = _nfs4_open_expired(sp, state, dentry); |
| if (err == -NFS4ERR_DELAY) |
| nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| { |
| struct nfs_inode *nfsi = NFS_I(state->inode); |
| struct nfs_open_context *ctx; |
| int status; |
| |
| 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); |
| status = nfs4_do_open_expired(sp, state, ctx->dentry); |
| put_nfs_open_context(ctx); |
| return status; |
| } |
| spin_unlock(&state->inode->i_lock); |
| return -ENOENT; |
| } |
| |
| /* |
| * Returns an nfs4_state + an extra reference to the inode |
| */ |
| static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) |
| { |
| struct nfs_delegation *delegation; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_client *clp = server->nfs4_state; |
| struct nfs_inode *nfsi = NFS_I(inode); |
| struct nfs4_state_owner *sp = NULL; |
| struct nfs4_state *state = NULL; |
| int open_flags = flags & (FMODE_READ|FMODE_WRITE); |
| int err; |
| |
| /* Protect against reboot recovery - NOTE ORDER! */ |
| down_read(&clp->cl_sem); |
| /* Protect against delegation recall */ |
| down_read(&nfsi->rwsem); |
| delegation = NFS_I(inode)->delegation; |
| err = -ENOENT; |
| if (delegation == NULL || (delegation->type & open_flags) != open_flags) |
| goto out_err; |
| err = -ENOMEM; |
| if (!(sp = nfs4_get_state_owner(server, cred))) { |
| dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); |
| goto out_err; |
| } |
| state = nfs4_get_open_state(inode, sp); |
| if (state == NULL) |
| goto out_err; |
| |
| err = -ENOENT; |
| if ((state->state & open_flags) == open_flags) { |
| spin_lock(&inode->i_lock); |
| if (open_flags & FMODE_READ) |
| state->nreaders++; |
| if (open_flags & FMODE_WRITE) |
| state->nwriters++; |
| spin_unlock(&inode->i_lock); |
| goto out_ok; |
| } else if (state->state != 0) |
| goto out_err; |
| |
| lock_kernel(); |
| err = _nfs4_do_access(inode, cred, open_flags); |
| unlock_kernel(); |
| if (err != 0) |
| goto out_err; |
| set_bit(NFS_DELEGATED_STATE, &state->flags); |
| update_open_stateid(state, &delegation->stateid, open_flags); |
| out_ok: |
| nfs4_put_state_owner(sp); |
| up_read(&nfsi->rwsem); |
| up_read(&clp->cl_sem); |
| igrab(inode); |
| *res = state; |
| return 0; |
| out_err: |
| if (sp != NULL) { |
| if (state != NULL) |
| nfs4_put_open_state(state); |
| nfs4_put_state_owner(sp); |
| } |
| up_read(&nfsi->rwsem); |
| up_read(&clp->cl_sem); |
| if (err != -EACCES) |
| nfs_inode_return_delegation(inode); |
| return err; |
| } |
| |
| static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) |
| { |
| struct nfs4_exception exception = { }; |
| struct nfs4_state *res; |
| int err; |
| |
| do { |
| err = _nfs4_open_delegated(inode, flags, cred, &res); |
| if (err == 0) |
| break; |
| res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), |
| err, &exception)); |
| } while (exception.retry); |
| return res; |
| } |
| |
| /* |
| * Returns an nfs4_state + an referenced inode |
| */ |
| static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) |
| { |
| struct nfs4_state_owner *sp; |
| struct nfs4_state *state = NULL; |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs4_client *clp = server->nfs4_state; |
| struct inode *inode = NULL; |
| int status; |
| struct nfs_fattr f_attr, dir_attr; |
| struct nfs_openargs o_arg = { |
| .fh = NFS_FH(dir), |
| .open_flags = flags, |
| .name = &dentry->d_name, |
| .server = server, |
| .bitmask = server->attr_bitmask, |
| .claim = NFS4_OPEN_CLAIM_NULL, |
| }; |
| struct nfs_openres o_res = { |
| .f_attr = &f_attr, |
| .dir_attr = &dir_attr, |
| .server = server, |
| }; |
| |
| /* Protect against reboot recovery conflicts */ |
| down_read(&clp->cl_sem); |
| status = -ENOMEM; |
| if (!(sp = nfs4_get_state_owner(server, cred))) { |
| dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); |
| goto out_err; |
| } |
| if (flags & O_EXCL) { |
| u32 *p = (u32 *) o_arg.u.verifier.data; |
| p[0] = jiffies; |
| p[1] = current->pid; |
| } else |
| o_arg.u.attrs = sattr; |
| /* Serialization for the sequence id */ |
| |
| o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
| if (o_arg.seqid == NULL) |
| return -ENOMEM; |
| nfs_fattr_init(&f_attr); |
| nfs_fattr_init(&dir_attr); |
| status = _nfs4_proc_open(dir, sp, &o_arg, &o_res); |
| if (status != 0) |
| goto out_err; |
| |
| status = -ENOMEM; |
| inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr); |
| if (!inode) |
| goto out_err; |
| state = nfs4_get_open_state(inode, sp); |
| if (!state) |
| goto out_err; |
| update_open_stateid(state, &o_res.stateid, flags); |
| if (o_res.delegation_type != 0) |
| nfs_inode_set_delegation(inode, cred, &o_res); |
| nfs_free_seqid(o_arg.seqid); |
| nfs4_put_state_owner(sp); |
| up_read(&clp->cl_sem); |
| *res = state; |
| return 0; |
| out_err: |
| if (sp != NULL) { |
| if (state != NULL) |
| nfs4_put_open_state(state); |
| nfs_free_seqid(o_arg.seqid); |
| nfs4_put_state_owner(sp); |
| } |
| /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */ |
| up_read(&clp->cl_sem); |
| if (inode != NULL) |
| iput(inode); |
| *res = NULL; |
| return status; |
| } |
| |
| |
| static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred) |
| { |
| struct nfs4_exception exception = { }; |
| struct nfs4_state *res; |
| int status; |
| |
| do { |
| status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res); |
| 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) { |
| printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); |
| 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; |
| } |
| res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
| status, &exception)); |
| } while (exception.retry); |
| return res; |
| } |
| |
| static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, |
| struct nfs_fh *fhandle, struct iattr *sattr, |
| struct nfs4_state *state) |
| { |
| struct nfs_setattrargs arg = { |
| .fh = fhandle, |
| .iap = sattr, |
| .server = server, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs_setattrres res = { |
| .fattr = fattr, |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| nfs_fattr_init(fattr); |
| |
| if (state != NULL) { |
| msg.rpc_cred = state->owner->so_cred; |
| nfs4_copy_stateid(&arg.stateid, state, current->files); |
| } else |
| memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
| |
| status = rpc_call_sync(server->client, &msg, 0); |
| return status; |
| } |
| |
| static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, |
| struct nfs_fh *fhandle, struct iattr *sattr, |
| struct nfs4_state *state) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_do_setattr(server, fattr, fhandle, sattr, |
| state), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| struct nfs4_closedata { |
| struct inode *inode; |
| struct nfs4_state *state; |
| struct nfs_closeargs arg; |
| struct nfs_closeres res; |
| struct nfs_fattr fattr; |
| }; |
| |
| static void nfs4_free_closedata(void *data) |
| { |
| struct nfs4_closedata *calldata = data; |
| struct nfs4_state_owner *sp = calldata->state->owner; |
| |
| nfs4_put_open_state(calldata->state); |
| nfs_free_seqid(calldata->arg.seqid); |
| nfs4_put_state_owner(sp); |
| 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); |
| |
| /* hmm. we are done with the inode, and in the process of freeing |
| * the state_owner. we keep this around to process errors |
| */ |
| nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); |
| switch (task->tk_status) { |
| case 0: |
| memcpy(&state->stateid, &calldata->res.stateid, |
| sizeof(state->stateid)); |
| break; |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| nfs4_schedule_state_recovery(server->nfs4_state); |
| break; |
| default: |
| if (nfs4_async_handle_error(task, server) == -EAGAIN) { |
| rpc_restart_call(task); |
| return; |
| } |
| } |
| nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
| } |
| |
| static void nfs4_close_begin(struct rpc_task *task) |
| { |
| struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata; |
| struct nfs4_state *state = calldata->state; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], |
| .rpc_argp = &calldata->arg, |
| .rpc_resp = &calldata->res, |
| .rpc_cred = state->owner->so_cred, |
| }; |
| int mode = 0, old_mode; |
| |
| if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
| return; |
| /* Recalculate the new open mode in case someone reopened the file |
| * while we were waiting in line to be scheduled. |
| */ |
| spin_lock(&state->owner->so_lock); |
| spin_lock(&calldata->inode->i_lock); |
| mode = old_mode = state->state; |
| if (state->nreaders == 0) |
| mode &= ~FMODE_READ; |
| if (state->nwriters == 0) |
| mode &= ~FMODE_WRITE; |
| nfs4_state_set_mode_locked(state, mode); |
| spin_unlock(&calldata->inode->i_lock); |
| spin_unlock(&state->owner->so_lock); |
| if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
| /* Note: exit _without_ calling nfs4_close_done */ |
| task->tk_action = NULL; |
| return; |
| } |
| nfs_fattr_init(calldata->res.fattr); |
| if (mode != 0) |
| msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
| calldata->arg.open_flags = mode; |
| rpc_call_setup(task, &msg, 0); |
| } |
| |
| static const struct rpc_call_ops nfs4_close_ops = { |
| .rpc_call_done = nfs4_close_done, |
| .rpc_release = nfs4_free_closedata, |
| }; |
| |
| /* |
| * 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 inode *inode, struct nfs4_state *state) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_closedata *calldata; |
| int status = -ENOMEM; |
| |
| calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
| if (calldata == NULL) |
| goto out; |
| calldata->inode = inode; |
| calldata->state = state; |
| calldata->arg.fh = NFS_FH(inode); |
| calldata->arg.stateid = &state->stateid; |
| /* Serialization for the sequence id */ |
| calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
| if (calldata->arg.seqid == NULL) |
| goto out_free_calldata; |
| calldata->arg.bitmask = server->attr_bitmask; |
| calldata->res.fattr = &calldata->fattr; |
| calldata->res.server = server; |
| |
| status = nfs4_call_async(server->client, nfs4_close_begin, |
| &nfs4_close_ops, calldata); |
| if (status == 0) |
| goto out; |
| |
| nfs_free_seqid(calldata->arg.seqid); |
| out_free_calldata: |
| kfree(calldata); |
| out: |
| return status; |
| } |
| |
| static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state) |
| { |
| struct file *filp; |
| |
| filp = lookup_instantiate_filp(nd, dentry, NULL); |
| if (!IS_ERR(filp)) { |
| struct nfs_open_context *ctx; |
| ctx = (struct nfs_open_context *)filp->private_data; |
| ctx->state = state; |
| } else |
| nfs4_close_state(state, nd->intent.open.flags); |
| } |
| |
| struct dentry * |
| nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
| { |
| struct iattr attr; |
| struct rpc_cred *cred; |
| struct nfs4_state *state; |
| struct dentry *res; |
| |
| if (nd->flags & LOOKUP_CREATE) { |
| attr.ia_mode = nd->intent.open.create_mode; |
| attr.ia_valid = ATTR_MODE; |
| if (!IS_POSIXACL(dir)) |
| attr.ia_mode &= ~current->fs->umask; |
| } else { |
| attr.ia_valid = 0; |
| BUG_ON(nd->intent.open.flags & O_CREAT); |
| } |
| |
| cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); |
| if (IS_ERR(cred)) |
| return (struct dentry *)cred; |
| state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred); |
| put_rpccred(cred); |
| if (IS_ERR(state)) { |
| if (PTR_ERR(state) == -ENOENT) |
| d_add(dentry, NULL); |
| return (struct dentry *)state; |
| } |
| res = d_add_unique(dentry, state->inode); |
| if (res != NULL) |
| dentry = res; |
| nfs4_intent_set_file(nd, dentry, state); |
| return res; |
| } |
| |
| int |
| nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
| { |
| struct rpc_cred *cred; |
| struct nfs4_state *state; |
| struct inode *inode; |
| |
| cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); |
| if (IS_ERR(cred)) |
| return PTR_ERR(cred); |
| state = nfs4_open_delegated(dentry->d_inode, openflags, cred); |
| if (IS_ERR(state)) |
| state = nfs4_do_open(dir, dentry, openflags, NULL, cred); |
| put_rpccred(cred); |
| if (IS_ERR(state)) { |
| switch (PTR_ERR(state)) { |
| case -EPERM: |
| case -EACCES: |
| case -EDQUOT: |
| case -ENOSPC: |
| case -EROFS: |
| lookup_instantiate_filp(nd, (struct dentry *)state, NULL); |
| return 1; |
| case -ENOENT: |
| if (dentry->d_inode == NULL) |
| return 1; |
| } |
| goto out_drop; |
| } |
| inode = state->inode; |
| iput(inode); |
| if (inode == dentry->d_inode) { |
| nfs4_intent_set_file(nd, dentry, state); |
| return 1; |
| } |
| nfs4_close_state(state, openflags); |
| out_drop: |
| d_drop(dentry); |
| return 0; |
| } |
| |
| |
| static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| { |
| struct nfs4_server_caps_res res = {}; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], |
| .rpc_argp = fhandle, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| status = rpc_call_sync(server->client, &msg, 0); |
| if (status == 0) { |
| memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); |
| if (res.attr_bitmask[0] & FATTR4_WORD0_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; |
| server->acl_bitmask = res.acl_bitmask; |
| } |
| return status; |
| } |
| |
| static 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) |
| { |
| struct nfs4_lookup_root_arg args = { |
| .bitmask = nfs4_fattr_bitmap, |
| }; |
| 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, |
| }; |
| nfs_fattr_init(info->fattr); |
| return rpc_call_sync(server->client, &msg, 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_handle_exception(server, |
| _nfs4_lookup_root(server, fhandle, info), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| struct nfs_fattr * fattr = info->fattr; |
| unsigned char * p; |
| struct qstr q; |
| struct nfs4_lookup_arg args = { |
| .dir_fh = fhandle, |
| .name = &q, |
| .bitmask = nfs4_fattr_bitmap, |
| }; |
| struct nfs4_lookup_res res = { |
| .server = server, |
| .fattr = fattr, |
| .fh = fhandle, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| /* |
| * Now we do a separate LOOKUP for each component of the mount path. |
| * The LOOKUPs are done separately so that we can conveniently |
| * catch an ERR_WRONGSEC if it occurs along the way... |
| */ |
| status = nfs4_lookup_root(server, fhandle, info); |
| if (status) |
| goto out; |
| |
| p = server->mnt_path; |
| for (;;) { |
| struct nfs4_exception exception = { }; |
| |
| while (*p == '/') |
| p++; |
| if (!*p) |
| break; |
| q.name = p; |
| while (*p && (*p != '/')) |
| p++; |
| q.len = p - q.name; |
| |
| do { |
| nfs_fattr_init(fattr); |
| status = nfs4_handle_exception(server, |
| rpc_call_sync(server->client, &msg, 0), |
| &exception); |
| } while (exception.retry); |
| if (status == 0) |
| continue; |
| if (status == -ENOENT) { |
| printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path); |
| printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n"); |
| } |
| break; |
| } |
| if (status == 0) |
| status = nfs4_server_capabilities(server, fhandle); |
| if (status == 0) |
| status = nfs4_do_fsinfo(server, fhandle, info); |
| out: |
| return status; |
| } |
| |
| static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| { |
| struct nfs4_getattr_arg args = { |
| .fh = fhandle, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_getattr_res res = { |
| .fattr = fattr, |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| nfs_fattr_init(fattr); |
| return rpc_call_sync(server->client, &msg, 0); |
| } |
| |
| static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_proc_getattr(server, fhandle, fattr), |
| &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 rpc_cred *cred; |
| struct inode *inode = dentry->d_inode; |
| struct nfs_open_context *ctx; |
| struct nfs4_state *state = NULL; |
| int status; |
| |
| nfs_fattr_init(fattr); |
| |
| cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); |
| if (IS_ERR(cred)) |
| return PTR_ERR(cred); |
| |
| /* Search for an existing open(O_WRITE) file */ |
| ctx = nfs_find_open_context(inode, cred, FMODE_WRITE); |
| if (ctx != NULL) |
| state = ctx->state; |
| |
| status = nfs4_do_setattr(NFS_SERVER(inode), fattr, |
| NFS_FH(inode), sattr, state); |
| if (status == 0) |
| nfs_setattr_update_inode(inode, sattr); |
| if (ctx != NULL) |
| put_nfs_open_context(ctx); |
| put_rpccred(cred); |
| return status; |
| } |
| |
| static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, |
| struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| { |
| int status; |
| struct nfs_server *server = NFS_SERVER(dir); |
| 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, |
| .fh = fhandle, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| |
| nfs_fattr_init(fattr); |
| |
| dprintk("NFS call lookup %s\n", name->name); |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| dprintk("NFS reply lookup: %d\n", status); |
| return status; |
| } |
| |
| static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_lookup(dir, name, fhandle, fattr), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| { |
| struct nfs4_accessargs args = { |
| .fh = NFS_FH(inode), |
| }; |
| struct nfs4_accessres res = { 0 }; |
| 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; |
| |
| /* |
| * 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; |
| } |
| status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| if (!status) { |
| entry->mask = 0; |
| if (res.access & NFS4_ACCESS_READ) |
| entry->mask |= MAY_READ; |
| if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) |
| entry->mask |= MAY_WRITE; |
| if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) |
| entry->mask |= MAY_EXEC; |
| } |
| return status; |
| } |
| |
| static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(inode), |
| _nfs4_proc_access(inode, entry), |
| &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. This means that |
| * we can't use xdr_encode_pages() as written: we need a variant |
| * of it which would leave room in the 'tail' iovec. |
| * |
| * 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 rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], |
| .rpc_argp = &args, |
| .rpc_resp = NULL, |
| }; |
| |
| return rpc_call_sync(NFS_CLIENT(inode), &msg, 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_handle_exception(NFS_SERVER(inode), |
| _nfs4_proc_readlink(inode, page, pgbase, pglen), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_read(struct nfs_read_data *rdata) |
| { |
| int flags = rdata->flags; |
| struct inode *inode = rdata->inode; |
| struct nfs_fattr *fattr = rdata->res.fattr; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], |
| .rpc_argp = &rdata->args, |
| .rpc_resp = &rdata->res, |
| .rpc_cred = rdata->cred, |
| }; |
| unsigned long timestamp = jiffies; |
| int status; |
| |
| dprintk("NFS call read %d @ %Ld\n", rdata->args.count, |
| (long long) rdata->args.offset); |
| |
| nfs_fattr_init(fattr); |
| status = rpc_call_sync(server->client, &msg, flags); |
| if (!status) |
| renew_lease(server, timestamp); |
| dprintk("NFS reply read: %d\n", status); |
| return status; |
| } |
| |
| static int nfs4_proc_read(struct nfs_read_data *rdata) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(rdata->inode), |
| _nfs4_proc_read(rdata), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_write(struct nfs_write_data *wdata) |
| { |
| int rpcflags = wdata->flags; |
| struct inode *inode = wdata->inode; |
| struct nfs_fattr *fattr = wdata->res.fattr; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], |
| .rpc_argp = &wdata->args, |
| .rpc_resp = &wdata->res, |
| .rpc_cred = wdata->cred, |
| }; |
| int status; |
| |
| dprintk("NFS call write %d @ %Ld\n", wdata->args.count, |
| (long long) wdata->args.offset); |
| |
| wdata->args.bitmask = server->attr_bitmask; |
| wdata->res.server = server; |
| nfs_fattr_init(fattr); |
| status = rpc_call_sync(server->client, &msg, rpcflags); |
| dprintk("NFS reply write: %d\n", status); |
| if (status < 0) |
| return status; |
| nfs_post_op_update_inode(inode, fattr); |
| return wdata->res.count; |
| } |
| |
| static int nfs4_proc_write(struct nfs_write_data *wdata) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(wdata->inode), |
| _nfs4_proc_write(wdata), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_commit(struct nfs_write_data *cdata) |
| { |
| struct inode *inode = cdata->inode; |
| struct nfs_fattr *fattr = cdata->res.fattr; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], |
| .rpc_argp = &cdata->args, |
| .rpc_resp = &cdata->res, |
| .rpc_cred = cdata->cred, |
| }; |
| int status; |
| |
| dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, |
| (long long) cdata->args.offset); |
| |
| cdata->args.bitmask = server->attr_bitmask; |
| cdata->res.server = server; |
| nfs_fattr_init(fattr); |
| status = rpc_call_sync(server->client, &msg, 0); |
| dprintk("NFS reply commit: %d\n", status); |
| if (status >= 0) |
| nfs_post_op_update_inode(inode, fattr); |
| return status; |
| } |
| |
| static int nfs4_proc_commit(struct nfs_write_data *cdata) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(cdata->inode), |
| _nfs4_proc_commit(cdata), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| /* |
| * Got race? |
| * We will need to arrange for the VFS layer to provide an atomic open. |
| * Until then, this create/open method is prone to inefficiency and race |
| * conditions due to the lookup, create, and open VFS calls from sys_open() |
| * placed on the wire. |
| * |
| * Given the above sorry state of affairs, I'm simply sending an OPEN. |
| * The file will be opened again in the subsequent VFS open call |
| * (nfs4_proc_file_open). |
| * |
| * The open for read will just hang around to be used by any process that |
| * opens the file O_RDONLY. This will all be resolved with the VFS changes. |
| */ |
| |
| static int |
| nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| int flags, struct nameidata *nd) |
| { |
| struct nfs4_state *state; |
| struct rpc_cred *cred; |
| int status = 0; |
| |
| cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); |
| if (IS_ERR(cred)) { |
| status = PTR_ERR(cred); |
| goto out; |
| } |
| state = nfs4_do_open(dir, dentry, flags, sattr, cred); |
| put_rpccred(cred); |
| if (IS_ERR(state)) { |
| status = PTR_ERR(state); |
| goto out; |
| } |
| d_instantiate(dentry, state->inode); |
| if (flags & O_EXCL) { |
| struct nfs_fattr fattr; |
| status = nfs4_do_setattr(NFS_SERVER(dir), &fattr, |
| NFS_FH(state->inode), sattr, state); |
| if (status == 0) |
| nfs_setattr_update_inode(state->inode, sattr); |
| } |
| if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN)) |
| nfs4_intent_set_file(nd, dentry, state); |
| else |
| nfs4_close_state(state, flags); |
| out: |
| return status; |
| } |
| |
| static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs4_remove_arg args = { |
| .fh = NFS_FH(dir), |
| .name = name, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs_fattr dir_attr; |
| struct nfs4_remove_res res = { |
| .server = server, |
| .dir_attr = &dir_attr, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
| .rpc_argp = &args, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| nfs_fattr_init(res.dir_attr); |
| status = rpc_call_sync(server->client, &msg, 0); |
| if (status == 0) { |
| update_changeattr(dir, &res.cinfo); |
| nfs_post_op_update_inode(dir, res.dir_attr); |
| } |
| return status; |
| } |
| |
| static int nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_remove(dir, name), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| struct unlink_desc { |
| struct nfs4_remove_arg args; |
| struct nfs4_remove_res res; |
| struct nfs_fattr dir_attr; |
| }; |
| |
| static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, |
| struct qstr *name) |
| { |
| struct nfs_server *server = NFS_SERVER(dir->d_inode); |
| struct unlink_desc *up; |
| |
| up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL); |
| if (!up) |
| return -ENOMEM; |
| |
| up->args.fh = NFS_FH(dir->d_inode); |
| up->args.name = name; |
| up->args.bitmask = server->attr_bitmask; |
| up->res.server = server; |
| up->res.dir_attr = &up->dir_attr; |
| |
| msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
| msg->rpc_argp = &up->args; |
| msg->rpc_resp = &up->res; |
| return 0; |
| } |
| |
| static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) |
| { |
| struct rpc_message *msg = &task->tk_msg; |
| struct unlink_desc *up; |
| |
| if (msg->rpc_resp != NULL) { |
| up = container_of(msg->rpc_resp, struct unlink_desc, res); |
| update_changeattr(dir->d_inode, &up->res.cinfo); |
| nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); |
| kfree(up); |
| msg->rpc_resp = NULL; |
| msg->rpc_argp = NULL; |
| } |
| return 0; |
| } |
| |
| static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| struct inode *new_dir, struct qstr *new_name) |
| { |
| struct nfs_server *server = NFS_SERVER(old_dir); |
| struct nfs4_rename_arg arg = { |
| .old_dir = NFS_FH(old_dir), |
| .new_dir = NFS_FH(new_dir), |
| .old_name = old_name, |
| .new_name = new_name, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs_fattr old_fattr, new_fattr; |
| struct nfs4_rename_res res = { |
| .server = server, |
| .old_fattr = &old_fattr, |
| .new_fattr = &new_fattr, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| nfs_fattr_init(res.old_fattr); |
| nfs_fattr_init(res.new_fattr); |
| status = rpc_call_sync(server->client, &msg, 0); |
| |
| if (!status) { |
| update_changeattr(old_dir, &res.old_cinfo); |
| nfs_post_op_update_inode(old_dir, res.old_fattr); |
| update_changeattr(new_dir, &res.new_cinfo); |
| nfs_post_op_update_inode(new_dir, res.new_fattr); |
| } |
| return status; |
| } |
| |
| static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| struct inode *new_dir, struct qstr *new_name) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(old_dir), |
| _nfs4_proc_rename(old_dir, old_name, |
| new_dir, new_name), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| 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 nfs_fattr fattr, dir_attr; |
| struct nfs4_link_res res = { |
| .server = server, |
| .fattr = &fattr, |
| .dir_attr = &dir_attr, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| nfs_fattr_init(res.fattr); |
| nfs_fattr_init(res.dir_attr); |
| status = rpc_call_sync(server->client, &msg, 0); |
| if (!status) { |
| update_changeattr(dir, &res.cinfo); |
| nfs_post_op_update_inode(dir, res.dir_attr); |
| nfs_refresh_inode(inode, 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; |
| } |
| |
| static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, |
| struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_fattr dir_fattr; |
| struct nfs4_create_arg arg = { |
| .dir_fh = NFS_FH(dir), |
| .server = server, |
| .name = name, |
| .attrs = sattr, |
| .ftype = NF4LNK, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_create_res res = { |
| .server = server, |
| .fh = fhandle, |
| .fattr = fattr, |
| .dir_fattr = &dir_fattr, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| if (path->len > NFS4_MAXPATHLEN) |
| return -ENAMETOOLONG; |
| arg.u.symlink = path; |
| nfs_fattr_init(fattr); |
| nfs_fattr_init(&dir_fattr); |
| |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| if (!status) |
| update_changeattr(dir, &res.dir_cinfo); |
| nfs_post_op_update_inode(dir, res.dir_fattr); |
| return status; |
| } |
| |
| static int nfs4_proc_symlink(struct inode *dir, struct qstr *name, |
| struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_symlink(dir, name, path, sattr, |
| fhandle, fattr), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_fh fhandle; |
| struct nfs_fattr fattr, dir_fattr; |
| struct nfs4_create_arg arg = { |
| .dir_fh = NFS_FH(dir), |
| .server = server, |
| .name = &dentry->d_name, |
| .attrs = sattr, |
| .ftype = NF4DIR, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_create_res res = { |
| .server = server, |
| .fh = &fhandle, |
| .fattr = &fattr, |
| .dir_fattr = &dir_fattr, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| nfs_fattr_init(&fattr); |
| nfs_fattr_init(&dir_fattr); |
| |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| if (!status) { |
| update_changeattr(dir, &res.dir_cinfo); |
| nfs_post_op_update_inode(dir, res.dir_fattr); |
| status = nfs_instantiate(dentry, &fhandle, &fattr); |
| } |
| return status; |
| } |
| |
| static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_mkdir(dir, dentry, sattr), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| u64 cookie, struct page *page, unsigned int count, int plus) |
| { |
| struct inode *dir = dentry->d_inode; |
| struct nfs4_readdir_arg args = { |
| .fh = NFS_FH(dir), |
| .pages = &page, |
| .pgbase = 0, |
| .count = count, |
| .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, |
| }; |
| 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 = %s/%s, cookie = %Lu\n", __FUNCTION__, |
| dentry->d_parent->d_name.name, |
| dentry->d_name.name, |
| (unsigned long long)cookie); |
| lock_kernel(); |
| nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
| res.pgbase = args.pgbase; |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| if (status == 0) |
| memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); |
| unlock_kernel(); |
| dprintk("%s: returns %d\n", __FUNCTION__, status); |
| return status; |
| } |
| |
| static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| u64 cookie, struct page *page, unsigned int count, int plus) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), |
| _nfs4_proc_readdir(dentry, cred, cookie, |
| page, count, plus), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr, dev_t rdev) |
| { |
| struct nfs_server *server = NFS_SERVER(dir); |
| struct nfs_fh fh; |
| struct nfs_fattr fattr, dir_fattr; |
| struct nfs4_create_arg arg = { |
| .dir_fh = NFS_FH(dir), |
| .server = server, |
| .name = &dentry->d_name, |
| .attrs = sattr, |
| .bitmask = server->attr_bitmask, |
| }; |
| struct nfs4_create_res res = { |
| .server = server, |
| .fh = &fh, |
| .fattr = &fattr, |
| .dir_fattr = &dir_fattr, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status; |
| int mode = sattr->ia_mode; |
| |
| nfs_fattr_init(&fattr); |
| nfs_fattr_init(&dir_fattr); |
| |
| BUG_ON(!(sattr->ia_valid & ATTR_MODE)); |
| BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); |
| if (S_ISFIFO(mode)) |
| arg.ftype = NF4FIFO; |
| else if (S_ISBLK(mode)) { |
| arg.ftype = NF4BLK; |
| arg.u.device.specdata1 = MAJOR(rdev); |
| arg.u.device.specdata2 = MINOR(rdev); |
| } |
| else if (S_ISCHR(mode)) { |
| arg.ftype = NF4CHR; |
| arg.u.device.specdata1 = MAJOR(rdev); |
| arg.u.device.specdata2 = MINOR(rdev); |
| } |
| else |
| arg.ftype = NF4SOCK; |
| |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| if (status == 0) { |
| update_changeattr(dir, &res.dir_cinfo); |
| nfs_post_op_update_inode(dir, res.dir_fattr); |
| status = nfs_instantiate(dentry, &fh, &fattr); |
| } |
| return status; |
| } |
| |
| static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| struct iattr *sattr, dev_t rdev) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(dir), |
| _nfs4_proc_mknod(dir, dentry, sattr, rdev), |
| &exception); |
| } while (exception.retry); |
| 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 rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], |
| .rpc_argp = &args, |
| .rpc_resp = fsstat, |
| }; |
| |
| nfs_fattr_init(fsstat->fattr); |
| return rpc_call_sync(server->client, &msg, 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 rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], |
| .rpc_argp = &args, |
| .rpc_resp = fsinfo, |
| }; |
| |
| return rpc_call_sync(server->client, &msg, 0); |
| } |
| |
| static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = nfs4_handle_exception(server, |
| _nfs4_do_fsinfo(server, fhandle, fsinfo), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| { |
| nfs_fattr_init(fsinfo->fattr); |
| return nfs4_do_fsinfo(server, fhandle, fsinfo); |
| } |
| |
| 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 rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], |
| .rpc_argp = &args, |
| .rpc_resp = pathconf, |
| }; |
| |
| /* 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 rpc_call_sync(server->client, &msg, 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; |
| } |
| |
| static void nfs4_read_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs_read_data *data = calldata; |
| struct inode *inode = data->inode; |
| |
| if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { |
| rpc_restart_call(task); |
| return; |
| } |
| if (task->tk_status > 0) |
| renew_lease(NFS_SERVER(inode), data->timestamp); |
| /* Call back common NFS readpage processing */ |
| nfs_readpage_result(task, calldata); |
| } |
| |
| static const struct rpc_call_ops nfs4_read_ops = { |
| .rpc_call_done = nfs4_read_done, |
| .rpc_release = nfs_readdata_release, |
| }; |
| |
| static void |
| nfs4_proc_read_setup(struct nfs_read_data *data) |
| { |
| struct rpc_task *task = &data->task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], |
| .rpc_argp = &data->args, |
| .rpc_resp = &data->res, |
| .rpc_cred = data->cred, |
| }; |
| struct inode *inode = data->inode; |
| int flags; |
| |
| data->timestamp = jiffies; |
| |
| /* N.B. Do we need to test? Never called for swapfile inode */ |
| flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); |
| |
| /* Finalize the task. */ |
| rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_read_ops, data); |
| rpc_call_setup(task, &msg, 0); |
| } |
| |
| static void nfs4_write_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs_write_data *data = calldata; |
| struct inode *inode = data->inode; |
| |
| if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { |
| rpc_restart_call(task); |
| return; |
| } |
| if (task->tk_status >= 0) { |
| renew_lease(NFS_SERVER(inode), data->timestamp); |
| nfs_post_op_update_inode(inode, data->res.fattr); |
| } |
| /* Call back common NFS writeback processing */ |
| nfs_writeback_done(task, calldata); |
| } |
| |
| static const struct rpc_call_ops nfs4_write_ops = { |
| .rpc_call_done = nfs4_write_done, |
| .rpc_release = nfs_writedata_release, |
| }; |
| |
| static void |
| nfs4_proc_write_setup(struct nfs_write_data *data, int how) |
| { |
| struct rpc_task *task = &data->task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], |
| .rpc_argp = &data->args, |
| .rpc_resp = &data->res, |
| .rpc_cred = data->cred, |
| }; |
| struct inode *inode = data->inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| int stable; |
| int flags; |
| |
| if (how & FLUSH_STABLE) { |
| if (!NFS_I(inode)->ncommit) |
| stable = NFS_FILE_SYNC; |
| else |
| stable = NFS_DATA_SYNC; |
| } else |
| stable = NFS_UNSTABLE; |
| data->args.stable = stable; |
| data->args.bitmask = server->attr_bitmask; |
| data->res.server = server; |
| |
| data->timestamp = jiffies; |
| |
| /* Set the initial flags for the task. */ |
| flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; |
| |
| /* Finalize the task. */ |
| rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_write_ops, data); |
| rpc_call_setup(task, &msg, 0); |
| } |
| |
| static void nfs4_commit_done(struct rpc_task *task, void *calldata) |
| { |
| struct nfs_write_data *data = calldata; |
| struct inode *inode = data->inode; |
| |
| if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { |
| rpc_restart_call(task); |
| return; |
| } |
| if (task->tk_status >= 0) |
| nfs_post_op_update_inode(inode, data->res.fattr); |
| /* Call back common NFS writeback processing */ |
| nfs_commit_done(task, calldata); |
| } |
| |
| static const struct rpc_call_ops nfs4_commit_ops = { |
| .rpc_call_done = nfs4_commit_done, |
| .rpc_release = nfs_commit_release, |
| }; |
| |
| static void |
| nfs4_proc_commit_setup(struct nfs_write_data *data, int how) |
| { |
| struct rpc_task *task = &data->task; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], |
| .rpc_argp = &data->args, |
| .rpc_resp = &data->res, |
| .rpc_cred = data->cred, |
| }; |
| struct inode *inode = data->inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| int flags; |
| |
| data->args.bitmask = server->attr_bitmask; |
| data->res.server = server; |
| |
| /* Set the initial flags for the task. */ |
| flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; |
| |
| /* Finalize the task. */ |
| rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_commit_ops, data); |
| rpc_call_setup(task, &msg, 0); |
| } |
| |
| /* |
| * 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_done(struct rpc_task *task, void *data) |
| { |
| struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp; |
| unsigned long timestamp = (unsigned long)data; |
| |
| if (task->tk_status < 0) { |
| switch (task->tk_status) { |
| case -NFS4ERR_STALE_CLIENTID: |
| case -NFS4ERR_EXPIRED: |
| case -NFS4ERR_CB_PATH_DOWN: |
| nfs4_schedule_state_recovery(clp); |
| } |
| return; |
| } |
| spin_lock(&clp->cl_lock); |
| if (time_before(clp->cl_last_renewal,timestamp)) |
| clp->cl_last_renewal = timestamp; |
| spin_unlock(&clp->cl_lock); |
| } |
| |
| static const struct rpc_call_ops nfs4_renew_ops = { |
| .rpc_call_done = nfs4_renew_done, |
| }; |
| |
| int |
| nfs4_proc_async_renew(struct nfs4_client *clp) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| .rpc_argp = clp, |
| .rpc_cred = clp->cl_cred, |
| }; |
| |
| return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, |
| &nfs4_renew_ops, (void *)jiffies); |
| } |
| |
| int |
| nfs4_proc_renew(struct nfs4_client *clp) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| .rpc_argp = clp, |
| .rpc_cred = clp->cl_cred, |
| }; |
| unsigned long now = jiffies; |
| int status; |
| |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| if (status < 0) |
| return status; |
| spin_lock(&clp->cl_lock); |
| if (time_before(clp->cl_last_renewal,now)) |
| clp->cl_last_renewal = now; |
| spin_unlock(&clp->cl_lock); |
| return 0; |
| } |
| |
| static inline int nfs4_server_supports_acls(struct nfs_server *server) |
| { |
| return (server->caps & NFS_CAP_ACLS) |
| && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) |
| && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); |
| } |
| |
| /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that |
| * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on |
| * the stack. |
| */ |
| #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) |
| |
| static void buf_to_pages(const void *buf, size_t buflen, |
| struct page **pages, unsigned int *pgbase) |
| { |
| const void *p = buf; |
| |
| *pgbase = offset_in_page(buf); |
| p -= *pgbase; |
| while (p < buf + buflen) { |
| *(pages++) = virt_to_page(p); |
| p += PAGE_CACHE_SIZE; |
| } |
| } |
| |
| 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, const char *buf, size_t acl_len) |
| { |
| struct nfs4_cached_acl *acl; |
| |
| if (buf && acl_len <= PAGE_SIZE) { |
| acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); |
| if (acl == NULL) |
| goto out; |
| acl->cached = 1; |
| memcpy(acl->data, buf, 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); |
| } |
| |
| static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| { |
| struct page *pages[NFS4ACL_MAXPAGES]; |
| struct nfs_getaclargs args = { |
| .fh = NFS_FH(inode), |
| .acl_pages = pages, |
| .acl_len = buflen, |
| }; |
| size_t resp_len = buflen; |
| void *resp_buf; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], |
| .rpc_argp = &args, |
| .rpc_resp = &resp_len, |
| }; |
| struct page *localpage = NULL; |
| int ret; |
| |
| if (buflen < PAGE_SIZE) { |
| /* As long as we're doing a round trip to the server anyway, |
| * let's be prepared for a page of acl data. */ |
| localpage = alloc_page(GFP_KERNEL); |
| resp_buf = page_address(localpage); |
| if (localpage == NULL) |
| return -ENOMEM; |
| args.acl_pages[0] = localpage; |
| args.acl_pgbase = 0; |
| resp_len = args.acl_len = PAGE_SIZE; |
| } else { |
| resp_buf = buf; |
| buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); |
| } |
| ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| if (ret) |
| goto out_free; |
| if (resp_len > args.acl_len) |
| nfs4_write_cached_acl(inode, NULL, resp_len); |
| else |
| nfs4_write_cached_acl(inode, resp_buf, resp_len); |
| if (buf) { |
| ret = -ERANGE; |
| if (resp_len > buflen) |
| goto out_free; |
| if (localpage) |
| memcpy(buf, resp_buf, resp_len); |
| } |
| ret = resp_len; |
| out_free: |
| if (localpage) |
| __free_page(localpage); |
| 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; |
| ret = nfs4_read_cached_acl(inode, buf, buflen); |
| if (ret != -ENOENT) |
| 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 rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], |
| .rpc_argp = &arg, |
| .rpc_resp = NULL, |
| }; |
| int ret; |
| |
| if (!nfs4_server_supports_acls(server)) |
| return -EOPNOTSUPP; |
| nfs_inode_return_delegation(inode); |
| buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
| ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0); |
| if (ret == 0) |
| nfs4_write_cached_acl(inode, buf, buflen); |
| return ret; |
| } |
| |
| static int |
| nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) |
| { |
| struct nfs4_client *clp = server->nfs4_state; |
| |
| if (!clp || task->tk_status >= 0) |
| return 0; |
| switch(task->tk_status) { |
| case -NFS4ERR_STALE_CLIENTID: |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); |
| nfs4_schedule_state_recovery(clp); |
| if (test_bit(NFS4CLNT_OK, &clp->cl_state)) |
| rpc_wake_up_task(task); |
| task->tk_status = 0; |
| return -EAGAIN; |
| case -NFS4ERR_GRACE: |
| case -NFS4ERR_DELAY: |
| rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| task->tk_status = 0; |
| return -EAGAIN; |
| case -NFS4ERR_OLD_STATEID: |
| task->tk_status = 0; |
| return -EAGAIN; |
| } |
| task->tk_status = nfs4_map_errors(task->tk_status); |
| return 0; |
| } |
| |
| static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp) |
| { |
| DEFINE_WAIT(wait); |
| sigset_t oldset; |
| int interruptible, res = 0; |
| |
| might_sleep(); |
| |
| rpc_clnt_sigmask(clnt, &oldset); |
| interruptible = TASK_UNINTERRUPTIBLE; |
| if (clnt->cl_intr) |
| interruptible = TASK_INTERRUPTIBLE; |
| prepare_to_wait(&clp->cl_waitq, &wait, interruptible); |
| nfs4_schedule_state_recovery(clp); |
| if (clnt->cl_intr && signalled()) |
| res = -ERESTARTSYS; |
| else if (!test_bit(NFS4CLNT_OK, &clp->cl_state)) |
| schedule(); |
| finish_wait(&clp->cl_waitq, &wait); |
| rpc_clnt_sigunmask(clnt, &oldset); |
| return res; |
| } |
| |
| static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) |
| { |
| sigset_t oldset; |
| int res = 0; |
| |
| might_sleep(); |
| |
| if (*timeout <= 0) |
| *timeout = NFS4_POLL_RETRY_MIN; |
| if (*timeout > NFS4_POLL_RETRY_MAX) |
| *timeout = NFS4_POLL_RETRY_MAX; |
| rpc_clnt_sigmask(clnt, &oldset); |
| if (clnt->cl_intr) { |
| schedule_timeout_interruptible(*timeout); |
| if (signalled()) |
| res = -ERESTARTSYS; |
| } else |
| schedule_timeout_uninterruptible(*timeout); |
| rpc_clnt_sigunmask(clnt, &oldset); |
| *timeout <<= 1; |
| return res; |
| } |
| |
| /* This is the error handling routine for processes that are allowed |
| * to sleep. |
| */ |
| int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
| { |
| struct nfs4_client *clp = server->nfs4_state; |
| int ret = errorcode; |
| |
| exception->retry = 0; |
| switch(errorcode) { |
| case 0: |
| return 0; |
| case -NFS4ERR_STALE_CLIENTID: |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| ret = nfs4_wait_clnt_recover(server->client, clp); |
| if (ret == 0) |
| exception->retry = 1; |
| break; |
| case -NFS4ERR_GRACE: |
| case -NFS4ERR_DELAY: |
| ret = nfs4_delay(server->client, &exception->timeout); |
| if (ret != 0) |
| break; |
| case -NFS4ERR_OLD_STATEID: |
| exception->retry = 1; |
| } |
| /* We failed to handle the error */ |
| return nfs4_map_errors(ret); |
| } |
| |
| int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port) |
| { |
| nfs4_verifier sc_verifier; |
| struct nfs4_setclientid setclientid = { |
| .sc_verifier = &sc_verifier, |
| .sc_prog = program, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], |
| .rpc_argp = &setclientid, |
| .rpc_resp = clp, |
| .rpc_cred = clp->cl_cred, |
| }; |
| u32 *p; |
| int loop = 0; |
| int status; |
| |
| p = (u32*)sc_verifier.data; |
| *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
| *p = htonl((u32)clp->cl_boot_time.tv_nsec); |
| |
| for(;;) { |
| setclientid.sc_name_len = scnprintf(setclientid.sc_name, |
| sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", |
| clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr), |
| clp->cl_cred->cr_ops->cr_name, |
| clp->cl_id_uniquifier); |
| setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, |
| sizeof(setclientid.sc_netid), "tcp"); |
| setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
| sizeof(setclientid.sc_uaddr), "%s.%d.%d", |
| clp->cl_ipaddr, port >> 8, port & 255); |
| |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| if (status != -NFS4ERR_CLID_INUSE) |
| break; |
| if (signalled()) |
| break; |
| if (loop++ & 1) |
| ssleep(clp->cl_lease_time + 1); |
| else |
| if (++clp->cl_id_uniquifier == 0) |
| break; |
| } |
| return status; |
| } |
| |
| int |
| nfs4_proc_setclientid_confirm(struct nfs4_client *clp) |
| { |
| struct nfs_fsinfo fsinfo; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], |
| .rpc_argp = clp, |
| .rpc_resp = &fsinfo, |
| .rpc_cred = clp->cl_cred, |
| }; |
| unsigned long now; |
| int status; |
| |
| now = jiffies; |
| status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| if (status == 0) { |
| spin_lock(&clp->cl_lock); |
| clp->cl_lease_time = fsinfo.lease_time * HZ; |
| clp->cl_last_renewal = now; |
| spin_unlock(&clp->cl_lock); |
| } |
| return status; |
| } |
| |
| static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) |
| { |
| struct nfs4_delegreturnargs args = { |
| .fhandle = NFS_FH(inode), |
| .stateid = stateid, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], |
| .rpc_argp = &args, |
| .rpc_cred = cred, |
| }; |
| |
| return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| } |
| |
| int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) |
| { |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| do { |
| err = _nfs4_proc_delegreturn(inode, cred, stateid); |
| switch (err) { |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| nfs4_schedule_state_recovery(server->nfs4_state); |
| 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) |
| { |
| schedule_timeout_interruptible(timeout); |
| timeout <<= 1; |
| if (timeout > NFS4_LOCK_MAXTIMEOUT) |
| return NFS4_LOCK_MAXTIMEOUT; |
| return timeout; |
| } |
| |
| static inline int |
| nfs4_lck_type(int cmd, struct file_lock *request) |
| { |
| /* set lock type */ |
| switch (request->fl_type) { |
| case F_RDLCK: |
| return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT; |
| case F_WRLCK: |
| return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT; |
| case F_UNLCK: |
| return NFS4_WRITE_LT; |
| } |
| BUG(); |
| return 0; |
| } |
| |
| static inline uint64_t |
| nfs4_lck_length(struct file_lock *request) |
| { |
| if (request->fl_end == OFFSET_MAX) |
| return ~(uint64_t)0; |
| return request->fl_end - request->fl_start + 1; |
| } |
| |
| 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 nfs4_client *clp = server->nfs4_state; |
| struct nfs_lockargs arg = { |
| .fh = NFS_FH(inode), |
| .type = nfs4_lck_type(cmd, request), |
| .offset = request->fl_start, |
| .length = nfs4_lck_length(request), |
| }; |
| struct nfs_lockres res = { |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| .rpc_cred = state->owner->so_cred, |
| }; |
| struct nfs_lowner nlo; |
| struct nfs4_lock_state *lsp; |
| int status; |
| |
| down_read(&clp->cl_sem); |
| nlo.clientid = clp->cl_clientid; |
| status = nfs4_set_lock_state(state, request); |
| if (status != 0) |
| goto out; |
| lsp = request->fl_u.nfs4_fl.owner; |
| nlo.id = lsp->ls_id; |
| arg.u.lockt = &nlo; |
| status = rpc_call_sync(server->client, &msg, 0); |
| if (!status) { |
| request->fl_type = F_UNLCK; |
| } else if (status == -NFS4ERR_DENIED) { |
| int64_t len, start, end; |
| start = res.u.denied.offset; |
| len = res.u.denied.length; |
| end = start + len - 1; |
| if (end < 0 || len == 0) |
| request->fl_end = OFFSET_MAX; |
| else |
| request->fl_end = (loff_t)end; |
| request->fl_start = (loff_t)start; |
| request->fl_type = F_WRLCK; |
| if (res.u.denied.type & 1) |
| request->fl_type = F_RDLCK; |
| request->fl_pid = 0; |
| status = 0; |
| } |
| out: |
| up_read(&clp->cl_sem); |
| 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_handle_exception(NFS_SERVER(state->inode), |
| _nfs4_proc_getlk(state, cmd, request), |
| &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int do_vfs_lock(struct file *file, struct file_lock *fl) |
| { |
| int res = 0; |
| switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { |
| case FL_POSIX: |
| res = posix_lock_file_wait(file, fl); |
| break; |
| case FL_FLOCK: |
| res = flock_lock_file_wait(file, fl); |
| break; |
| default: |
| BUG(); |
| } |
| if (res < 0) |
| printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", |
| __FUNCTION__); |
| return res; |
| } |
| |
| struct nfs4_unlockdata { |
| struct nfs_lockargs arg; |
| struct nfs_locku_opargs luargs; |
| struct nfs_lockres res; |
| struct nfs4_lock_state *lsp; |
| struct nfs_open_context *ctx; |
| atomic_t refcount; |
| struct completion completion; |
| }; |
| |
| static void nfs4_locku_release_calldata(struct nfs4_unlockdata *calldata) |
| { |
| if (atomic_dec_and_test(&calldata->refcount)) { |
| nfs_free_seqid(calldata->luargs.seqid); |
| nfs4_put_lock_state(calldata->lsp); |
| put_nfs_open_context(calldata->ctx); |
| kfree(calldata); |
| } |
| } |
| |
| static void nfs4_locku_complete(void *data) |
| { |
| struct nfs4_unlockdata *calldata = data; |
| complete(&calldata->completion); |
| nfs4_locku_release_calldata(calldata); |
| } |
| |
| static void nfs4_locku_done(struct rpc_task *task, void *data) |
| { |
| struct nfs4_unlockdata *calldata = data; |
| |
| nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid); |
| switch (task->tk_status) { |
| case 0: |
| memcpy(calldata->lsp->ls_stateid.data, |
| calldata->res.u.stateid.data, |
| sizeof(calldata->lsp->ls_stateid.data)); |
| break; |
| case -NFS4ERR_STALE_STATEID: |
| case -NFS4ERR_EXPIRED: |
| nfs4_schedule_state_recovery(calldata->res.server->nfs4_state); |
| break; |
| default: |
| if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) { |
| rpc_restart_call(task); |
| } |
| } |
| } |
| |
| static void nfs4_locku_begin(struct rpc_task *task) |
| { |
| struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], |
| .rpc_argp = &calldata->arg, |
| .rpc_resp = &calldata->res, |
| .rpc_cred = calldata->lsp->ls_state->owner->so_cred, |
| }; |
| int status; |
| |
| status = nfs_wait_on_sequence(calldata->luargs.seqid, task); |
| if (status != 0) |
| return; |
| if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { |
| /* Note: exit _without_ running nfs4_locku_done */ |
| task->tk_action = NULL; |
| return; |
| } |
| rpc_call_setup(task, &msg, 0); |
| } |
| |
| static const struct rpc_call_ops nfs4_locku_ops = { |
| .rpc_call_done = nfs4_locku_done, |
| .rpc_release = nfs4_locku_complete, |
| }; |
| |
| static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct nfs4_unlockdata *calldata; |
| struct inode *inode = state->inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_lock_state *lsp; |
| int status; |
| |
| /* Is this a delegated lock? */ |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| return do_vfs_lock(request->fl_file, request); |
| |
| status = nfs4_set_lock_state(state, request); |
| if (status != 0) |
| return status; |
| lsp = request->fl_u.nfs4_fl.owner; |
| /* We might have lost the locks! */ |
| if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) |
| return 0; |
| calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
| if (calldata == NULL) |
| return -ENOMEM; |
| calldata->luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
| if (calldata->luargs.seqid == NULL) { |
| kfree(calldata); |
| return -ENOMEM; |
| } |
| calldata->luargs.stateid = &lsp->ls_stateid; |
| calldata->arg.fh = NFS_FH(inode); |
| calldata->arg.type = nfs4_lck_type(cmd, request); |
| calldata->arg.offset = request->fl_start; |
| calldata->arg.length = nfs4_lck_length(request); |
| calldata->arg.u.locku = &calldata->luargs; |
| calldata->res.server = server; |
| calldata->lsp = lsp; |
| atomic_inc(&lsp->ls_count); |
| |
| /* Ensure we don't close file until we're done freeing locks! */ |
| calldata->ctx = get_nfs_open_context((struct nfs_open_context*)request->fl_file->private_data); |
| |
| atomic_set(&calldata->refcount, 2); |
| init_completion(&calldata->completion); |
| |
| status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_locku_begin, |
| &nfs4_locku_ops, calldata); |
| if (status == 0) |
| wait_for_completion_interruptible(&calldata->completion); |
| do_vfs_lock(request->fl_file, request); |
| nfs4_locku_release_calldata(calldata); |
| return status; |
| } |
| |
| static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim) |
| { |
| struct inode *inode = state->inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; |
| struct nfs_lock_opargs largs = { |
| .lock_stateid = &lsp->ls_stateid, |
| .open_stateid = &state->stateid, |
| .lock_owner = { |
| .clientid = server->nfs4_state->cl_clientid, |
| .id = lsp->ls_id, |
| }, |
| .reclaim = reclaim, |
| }; |
| struct nfs_lockargs arg = { |
| .fh = NFS_FH(inode), |
| .type = nfs4_lck_type(cmd, request), |
| .offset = request->fl_start, |
| .length = nfs4_lck_length(request), |
| .u = { |
| .lock = &largs, |
| }, |
| }; |
| struct nfs_lockres res = { |
| .server = server, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| .rpc_cred = state->owner->so_cred, |
| }; |
| int status = -ENOMEM; |
| |
| largs.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
| if (largs.lock_seqid == NULL) |
| return -ENOMEM; |
| if (!(lsp->ls_seqid.flags & NFS_SEQID_CONFIRMED)) { |
| struct nfs4_state_owner *owner = state->owner; |
| |
| largs.open_seqid = nfs_alloc_seqid(&owner->so_seqid); |
| if (largs.open_seqid == NULL) |
| goto out; |
| largs.new_lock_owner = 1; |
| status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
| /* increment open seqid on success, and seqid mutating errors */ |
| if (largs.new_lock_owner != 0) { |
| nfs_increment_open_seqid(status, largs.open_seqid); |
| if (status == 0) |
| nfs_confirm_seqid(&lsp->ls_seqid, 0); |
| } |
| nfs_free_seqid(largs.open_seqid); |
| } else |
| status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
| /* increment lock seqid on success, and seqid mutating errors*/ |
| nfs_increment_lock_seqid(status, largs.lock_seqid); |
| /* save the returned stateid. */ |
| if (status == 0) { |
| memcpy(lsp->ls_stateid.data, res.u.stateid.data, |
| sizeof(lsp->ls_stateid.data)); |
| lsp->ls_flags |= NFS_LOCK_INITIALIZED; |
| } else if (status == -NFS4ERR_DENIED) |
| status = -EAGAIN; |
| out: |
| nfs_free_seqid(largs.lock_seqid); |
| return status; |
| } |
| |
| 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 = { }; |
| int err; |
| |
| /* Cache the lock if possible... */ |
| if (test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| return 0; |
| do { |
| err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
| 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 = { }; |
| int err; |
| |
| err = nfs4_set_lock_state(state, request); |
| if (err != 0) |
| return err; |
| do { |
| err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
| if (err != -NFS4ERR_DELAY) |
| break; |
| nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| return err; |
| } |
| |
| static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct nfs4_client *clp = state->owner->so_client; |
| int status; |
| |
| /* Is this a delegated open? */ |
| if (NFS_I(state->inode)->delegation_state != 0) { |
| /* Yes: cache locks! */ |
| status = do_vfs_lock(request->fl_file, request); |
| /* ...but avoid races with delegation recall... */ |
| if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| return status; |
| } |
| down_read(&clp->cl_sem); |
| status = nfs4_set_lock_state(state, request); |
| if (status != 0) |
| goto out; |
| status = _nfs4_do_setlk(state, cmd, request, 0); |
| if (status != 0) |
| goto out; |
| /* Note: we always want to sleep here! */ |
| request->fl_flags |= FL_SLEEP; |
| if (do_vfs_lock(request->fl_file, request) < 0) |
| printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); |
| out: |
| up_read(&clp->cl_sem); |
| return status; |
| } |
| |
| static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| { |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| do { |
| err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| _nfs4_proc_setlk(state, cmd, request), |
| &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 = (struct nfs_open_context *)filp->private_data; |
| state = ctx->state; |
| |
| if (request->fl_start < 0 || request->fl_end < 0) |
| return -EINVAL; |
| |
| if (IS_GETLK(cmd)) |
| return nfs4_proc_getlk(state, F_GETLK, request); |
| |
| if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) |
| return -EINVAL; |
| |
| if (request->fl_type == F_UNLCK) |
| return nfs4_proc_unlck(state, cmd, request); |
| |
| 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 nfs4_state *state, struct file_lock *fl) |
| { |
| struct nfs_server *server = NFS_SERVER(state->inode); |
| struct nfs4_exception exception = { }; |
| int err; |
| |
| err = nfs4_set_lock_state(state, fl); |
| if (err != 0) |
| goto out; |
| do { |
| err = _nfs4_do_setlk(state, F_SETLK, fl, 0); |
| if (err != -NFS4ERR_DELAY) |
| break; |
| err = nfs4_handle_exception(server, err, &exception); |
| } while (exception.retry); |
| out: |
| return err; |
| } |
| |
| #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
| |
| int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
| size_t buflen, int flags) |
| { |
| struct inode *inode = dentry->d_inode; |
| |
| if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) |
| return -EOPNOTSUPP; |
| |
| if (!S_ISREG(inode->i_mode) && |
| (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) |
| return -EPERM; |
| |
| return nfs4_proc_set_acl(inode, buf, buflen); |
| } |
| |
| /* The getxattr man page suggests returning -ENODATA for unknown attributes, |
| * and that's what we'll do for e.g. user attributes that haven't been set. |
| * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported |
| * attributes in kernel-managed attribute namespaces. */ |
| ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, |
| size_t buflen) |
| { |
| struct inode *inode = dentry->d_inode; |
| |
| if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) |
| return -EOPNOTSUPP; |
| |
| return nfs4_proc_get_acl(inode, buf, buflen); |
| } |
| |
| ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) |
| { |
| size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
| |
| if (buf && buflen < len) |
| return -ERANGE; |
| if (buf) |
| memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
| return len; |
| } |
| |
| struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
| .recover_open = nfs4_open_reclaim, |
| .recover_lock = nfs4_lock_reclaim, |
| }; |
| |
| struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { |
| .recover_open = nfs4_open_expired, |
| .recover_lock = nfs4_lock_expired, |
| }; |
| |
| static struct inode_operations nfs4_file_inode_operations = { |
| .permission = nfs_permission, |
| .getattr = nfs_getattr, |
| .setattr = nfs_setattr, |
| .getxattr = nfs4_getxattr, |
| .setxattr = nfs4_setxattr, |
| .listxattr = nfs4_listxattr, |
| }; |
| |
| 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, |
| .getroot = nfs4_proc_get_root, |
| .getattr = nfs4_proc_getattr, |
| .setattr = nfs4_proc_setattr, |
| .lookup = nfs4_proc_lookup, |
| .access = nfs4_proc_access, |
| .readlink = nfs4_proc_readlink, |
| .read = nfs4_proc_read, |
| .write = nfs4_proc_write, |
| .commit = nfs4_proc_commit, |
| .create = nfs4_proc_create, |
| .remove = nfs4_proc_remove, |
| .unlink_setup = nfs4_proc_unlink_setup, |
| .unlink_done = nfs4_proc_unlink_done, |
| .rename = nfs4_proc_rename, |
| .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, |
| .decode_dirent = nfs4_decode_dirent, |
| .read_setup = nfs4_proc_read_setup, |
| .write_setup = nfs4_proc_write_setup, |
| .commit_setup = nfs4_proc_commit_setup, |
| .file_open = nfs_open, |
| .file_release = nfs_release, |
| .lock = nfs4_proc_lock, |
| .clear_acl_cache = nfs4_zap_acl_attr, |
| }; |
| |
| /* |
| * Local variables: |
| * c-basic-offset: 8 |
| * End: |
| */ |