| /* |
| * linux/fs/nfs/proc.c |
| * |
| * Copyright (C) 1992, 1993, 1994 Rick Sladkey |
| * |
| * OS-independent nfs remote procedure call functions |
| * |
| * Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers |
| * so at last we can have decent(ish) throughput off a |
| * Sun server. |
| * |
| * Coding optimized and cleaned up by Florian La Roche. |
| * Note: Error returns are optimized for NFS_OK, which isn't translated via |
| * nfs_stat_to_errno(), but happens to be already the right return code. |
| * |
| * Also, the code currently doesn't check the size of the packet, when |
| * it decodes the packet. |
| * |
| * Feel free to fix it and mail me the diffs if it worries you. |
| * |
| * Completely rewritten to support the new RPC call interface; |
| * rewrote and moved the entire XDR stuff to xdr.c |
| * --Olaf Kirch June 1996 |
| * |
| * The code below initializes all auto variables explicitly, otherwise |
| * it will fail to work as a module (gcc generates a memset call for an |
| * incomplete struct). |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/param.h> |
| #include <linux/time.h> |
| #include <linux/mm.h> |
| #include <linux/errno.h> |
| #include <linux/string.h> |
| #include <linux/in.h> |
| #include <linux/pagemap.h> |
| #include <linux/sunrpc/clnt.h> |
| #include <linux/nfs.h> |
| #include <linux/nfs2.h> |
| #include <linux/nfs_fs.h> |
| #include <linux/nfs_page.h> |
| #include <linux/lockd/bind.h> |
| #include <linux/freezer.h> |
| #include "internal.h" |
| |
| #define NFSDBG_FACILITY NFSDBG_PROC |
| |
| /* |
| * wrapper to handle the -EKEYEXPIRED error message. This should generally |
| * only happen if using krb5 auth and a user's TGT expires. NFSv2 doesn't |
| * support the NFSERR_JUKEBOX error code, but we handle this situation in the |
| * same way that we handle that error with NFSv3. |
| */ |
| static int |
| nfs_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) |
| { |
| int res; |
| do { |
| res = rpc_call_sync(clnt, msg, flags); |
| if (res != -EKEYEXPIRED) |
| break; |
| freezable_schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME); |
| res = -ERESTARTSYS; |
| } while (!fatal_signal_pending(current)); |
| return res; |
| } |
| |
| #define rpc_call_sync(clnt, msg, flags) nfs_rpc_wrapper(clnt, msg, flags) |
| |
| static int |
| nfs_async_handle_expired_key(struct rpc_task *task) |
| { |
| if (task->tk_status != -EKEYEXPIRED) |
| return 0; |
| task->tk_status = 0; |
| rpc_restart_call(task); |
| rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); |
| return 1; |
| } |
| |
| /* |
| * Bare-bones access to getattr: this is for nfs_read_super. |
| */ |
| static int |
| nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| struct nfs_fattr *fattr = info->fattr; |
| struct nfs2_fsstat fsinfo; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], |
| .rpc_argp = fhandle, |
| .rpc_resp = fattr, |
| }; |
| int status; |
| |
| dprintk("%s: call getattr\n", __func__); |
| nfs_fattr_init(fattr); |
| status = rpc_call_sync(server->client, &msg, 0); |
| /* Retry with default authentication if different */ |
| if (status && server->nfs_client->cl_rpcclient != server->client) |
| status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); |
| dprintk("%s: reply getattr: %d\n", __func__, status); |
| if (status) |
| return status; |
| dprintk("%s: call statfs\n", __func__); |
| msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS]; |
| msg.rpc_resp = &fsinfo; |
| status = rpc_call_sync(server->client, &msg, 0); |
| /* Retry with default authentication if different */ |
| if (status && server->nfs_client->cl_rpcclient != server->client) |
| status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); |
| dprintk("%s: reply statfs: %d\n", __func__, status); |
| if (status) |
| return status; |
| info->rtmax = NFS_MAXDATA; |
| info->rtpref = fsinfo.tsize; |
| info->rtmult = fsinfo.bsize; |
| info->wtmax = NFS_MAXDATA; |
| info->wtpref = fsinfo.tsize; |
| info->wtmult = fsinfo.bsize; |
| info->dtpref = fsinfo.tsize; |
| info->maxfilesize = 0x7FFFFFFF; |
| info->lease_time = 0; |
| return 0; |
| } |
| |
| /* |
| * One function for each procedure in the NFS protocol. |
| */ |
| static int |
| nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], |
| .rpc_argp = fhandle, |
| .rpc_resp = fattr, |
| }; |
| int status; |
| |
| dprintk("NFS call getattr\n"); |
| nfs_fattr_init(fattr); |
| status = rpc_call_sync(server->client, &msg, 0); |
| dprintk("NFS reply getattr: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| struct iattr *sattr) |
| { |
| struct inode *inode = dentry->d_inode; |
| struct nfs_sattrargs arg = { |
| .fh = NFS_FH(inode), |
| .sattr = sattr |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], |
| .rpc_argp = &arg, |
| .rpc_resp = fattr, |
| }; |
| int status; |
| |
| /* Mask out the non-modebit related stuff from attr->ia_mode */ |
| sattr->ia_mode &= S_IALLUGO; |
| |
| dprintk("NFS call setattr\n"); |
| if (sattr->ia_valid & ATTR_FILE) |
| msg.rpc_cred = nfs_file_cred(sattr->ia_file); |
| nfs_fattr_init(fattr); |
| status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| if (status == 0) |
| nfs_setattr_update_inode(inode, sattr); |
| dprintk("NFS reply setattr: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name, |
| struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| { |
| struct nfs_diropargs arg = { |
| .fh = NFS_FH(dir), |
| .name = name->name, |
| .len = name->len |
| }; |
| struct nfs_diropok res = { |
| .fh = fhandle, |
| .fattr = fattr |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| dprintk("NFS call lookup %s\n", name->name); |
| nfs_fattr_init(fattr); |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| dprintk("NFS reply lookup: %d\n", status); |
| return status; |
| } |
| |
| static int nfs_proc_readlink(struct inode *inode, struct page *page, |
| unsigned int pgbase, unsigned int pglen) |
| { |
| struct nfs_readlinkargs args = { |
| .fh = NFS_FH(inode), |
| .pgbase = pgbase, |
| .pglen = pglen, |
| .pages = &page |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_READLINK], |
| .rpc_argp = &args, |
| }; |
| int status; |
| |
| dprintk("NFS call readlink\n"); |
| status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| dprintk("NFS reply readlink: %d\n", status); |
| return status; |
| } |
| |
| struct nfs_createdata { |
| struct nfs_createargs arg; |
| struct nfs_diropok res; |
| struct nfs_fh fhandle; |
| struct nfs_fattr fattr; |
| }; |
| |
| static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir, |
| struct dentry *dentry, struct iattr *sattr) |
| { |
| struct nfs_createdata *data; |
| |
| data = kmalloc(sizeof(*data), GFP_KERNEL); |
| |
| if (data != NULL) { |
| data->arg.fh = NFS_FH(dir); |
| data->arg.name = dentry->d_name.name; |
| data->arg.len = dentry->d_name.len; |
| data->arg.sattr = sattr; |
| nfs_fattr_init(&data->fattr); |
| data->fhandle.size = 0; |
| data->res.fh = &data->fhandle; |
| data->res.fattr = &data->fattr; |
| } |
| return data; |
| }; |
| |
| static void nfs_free_createdata(const struct nfs_createdata *data) |
| { |
| kfree(data); |
| } |
| |
| static int |
| nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| int flags, struct nfs_open_context *ctx) |
| { |
| struct nfs_createdata *data; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_CREATE], |
| }; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call create %s\n", dentry->d_name.name); |
| data = nfs_alloc_createdata(dir, dentry, sattr); |
| if (data == NULL) |
| goto out; |
| msg.rpc_argp = &data->arg; |
| msg.rpc_resp = &data->res; |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| nfs_mark_for_revalidate(dir); |
| if (status == 0) |
| status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); |
| nfs_free_createdata(data); |
| out: |
| dprintk("NFS reply create: %d\n", status); |
| return status; |
| } |
| |
| /* |
| * In NFSv2, mknod is grafted onto the create call. |
| */ |
| static int |
| nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| dev_t rdev) |
| { |
| struct nfs_createdata *data; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_CREATE], |
| }; |
| umode_t mode; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call mknod %s\n", dentry->d_name.name); |
| |
| mode = sattr->ia_mode; |
| if (S_ISFIFO(mode)) { |
| sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; |
| sattr->ia_valid &= ~ATTR_SIZE; |
| } else if (S_ISCHR(mode) || S_ISBLK(mode)) { |
| sattr->ia_valid |= ATTR_SIZE; |
| sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ |
| } |
| |
| data = nfs_alloc_createdata(dir, dentry, sattr); |
| if (data == NULL) |
| goto out; |
| msg.rpc_argp = &data->arg; |
| msg.rpc_resp = &data->res; |
| |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| nfs_mark_for_revalidate(dir); |
| |
| if (status == -EINVAL && S_ISFIFO(mode)) { |
| sattr->ia_mode = mode; |
| nfs_fattr_init(data->res.fattr); |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| } |
| if (status == 0) |
| status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); |
| nfs_free_createdata(data); |
| out: |
| dprintk("NFS reply mknod: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs_proc_remove(struct inode *dir, struct qstr *name) |
| { |
| struct nfs_removeargs arg = { |
| .fh = NFS_FH(dir), |
| .name.len = name->len, |
| .name.name = name->name, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], |
| .rpc_argp = &arg, |
| }; |
| int status; |
| |
| dprintk("NFS call remove %s\n", name->name); |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| nfs_mark_for_revalidate(dir); |
| |
| dprintk("NFS reply remove: %d\n", status); |
| return status; |
| } |
| |
| static void |
| nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
| { |
| msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; |
| } |
| |
| static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
| { |
| if (nfs_async_handle_expired_key(task)) |
| return 0; |
| nfs_mark_for_revalidate(dir); |
| return 1; |
| } |
| |
| static void |
| nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir) |
| { |
| msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME]; |
| } |
| |
| static int |
| nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir, |
| struct inode *new_dir) |
| { |
| if (nfs_async_handle_expired_key(task)) |
| return 0; |
| nfs_mark_for_revalidate(old_dir); |
| nfs_mark_for_revalidate(new_dir); |
| return 1; |
| } |
| |
| static int |
| nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| struct inode *new_dir, struct qstr *new_name) |
| { |
| struct nfs_renameargs arg = { |
| .old_dir = NFS_FH(old_dir), |
| .old_name = old_name, |
| .new_dir = NFS_FH(new_dir), |
| .new_name = new_name, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_RENAME], |
| .rpc_argp = &arg, |
| }; |
| int status; |
| |
| dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); |
| status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); |
| nfs_mark_for_revalidate(old_dir); |
| nfs_mark_for_revalidate(new_dir); |
| dprintk("NFS reply rename: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| { |
| struct nfs_linkargs arg = { |
| .fromfh = NFS_FH(inode), |
| .tofh = NFS_FH(dir), |
| .toname = name->name, |
| .tolen = name->len |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_LINK], |
| .rpc_argp = &arg, |
| }; |
| int status; |
| |
| dprintk("NFS call link %s\n", name->name); |
| status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| nfs_mark_for_revalidate(inode); |
| nfs_mark_for_revalidate(dir); |
| dprintk("NFS reply link: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, |
| unsigned int len, struct iattr *sattr) |
| { |
| struct nfs_fh *fh; |
| struct nfs_fattr *fattr; |
| struct nfs_symlinkargs arg = { |
| .fromfh = NFS_FH(dir), |
| .fromname = dentry->d_name.name, |
| .fromlen = dentry->d_name.len, |
| .pages = &page, |
| .pathlen = len, |
| .sattr = sattr |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], |
| .rpc_argp = &arg, |
| }; |
| int status = -ENAMETOOLONG; |
| |
| dprintk("NFS call symlink %s\n", dentry->d_name.name); |
| |
| if (len > NFS2_MAXPATHLEN) |
| goto out; |
| |
| fh = nfs_alloc_fhandle(); |
| fattr = nfs_alloc_fattr(); |
| status = -ENOMEM; |
| if (fh == NULL || fattr == NULL) |
| goto out_free; |
| |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| nfs_mark_for_revalidate(dir); |
| |
| /* |
| * V2 SYMLINK requests don't return any attributes. Setting the |
| * filehandle size to zero indicates to nfs_instantiate that it |
| * should fill in the data with a LOOKUP call on the wire. |
| */ |
| if (status == 0) |
| status = nfs_instantiate(dentry, fh, fattr); |
| |
| out_free: |
| nfs_free_fattr(fattr); |
| nfs_free_fhandle(fh); |
| out: |
| dprintk("NFS reply symlink: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) |
| { |
| struct nfs_createdata *data; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], |
| }; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call mkdir %s\n", dentry->d_name.name); |
| data = nfs_alloc_createdata(dir, dentry, sattr); |
| if (data == NULL) |
| goto out; |
| msg.rpc_argp = &data->arg; |
| msg.rpc_resp = &data->res; |
| |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| nfs_mark_for_revalidate(dir); |
| if (status == 0) |
| status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); |
| nfs_free_createdata(data); |
| out: |
| dprintk("NFS reply mkdir: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs_proc_rmdir(struct inode *dir, struct qstr *name) |
| { |
| struct nfs_diropargs arg = { |
| .fh = NFS_FH(dir), |
| .name = name->name, |
| .len = name->len |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], |
| .rpc_argp = &arg, |
| }; |
| int status; |
| |
| dprintk("NFS call rmdir %s\n", name->name); |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| nfs_mark_for_revalidate(dir); |
| dprintk("NFS reply rmdir: %d\n", status); |
| return status; |
| } |
| |
| /* |
| * The READDIR implementation is somewhat hackish - we pass a temporary |
| * buffer to the encode function, which installs it in the receive |
| * the receive iovec. The decode function just parses the reply to make |
| * sure it is syntactically correct; the entries itself are decoded |
| * from nfs_readdir by calling the decode_entry function directly. |
| */ |
| static int |
| nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| u64 cookie, struct page **pages, unsigned int count, int plus) |
| { |
| struct inode *dir = dentry->d_inode; |
| struct nfs_readdirargs arg = { |
| .fh = NFS_FH(dir), |
| .cookie = cookie, |
| .count = count, |
| .pages = pages, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_READDIR], |
| .rpc_argp = &arg, |
| .rpc_cred = cred, |
| }; |
| int status; |
| |
| dprintk("NFS call readdir %d\n", (unsigned int)cookie); |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| |
| nfs_invalidate_atime(dir); |
| |
| dprintk("NFS reply readdir: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsstat *stat) |
| { |
| struct nfs2_fsstat fsinfo; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_STATFS], |
| .rpc_argp = fhandle, |
| .rpc_resp = &fsinfo, |
| }; |
| int status; |
| |
| dprintk("NFS call statfs\n"); |
| nfs_fattr_init(stat->fattr); |
| status = rpc_call_sync(server->client, &msg, 0); |
| dprintk("NFS reply statfs: %d\n", status); |
| if (status) |
| goto out; |
| stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; |
| stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; |
| stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; |
| stat->tfiles = 0; |
| stat->ffiles = 0; |
| stat->afiles = 0; |
| out: |
| return status; |
| } |
| |
| static int |
| nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| struct nfs2_fsstat fsinfo; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs_procedures[NFSPROC_STATFS], |
| .rpc_argp = fhandle, |
| .rpc_resp = &fsinfo, |
| }; |
| int status; |
| |
| dprintk("NFS call fsinfo\n"); |
| nfs_fattr_init(info->fattr); |
| status = rpc_call_sync(server->client, &msg, 0); |
| dprintk("NFS reply fsinfo: %d\n", status); |
| if (status) |
| goto out; |
| info->rtmax = NFS_MAXDATA; |
| info->rtpref = fsinfo.tsize; |
| info->rtmult = fsinfo.bsize; |
| info->wtmax = NFS_MAXDATA; |
| info->wtpref = fsinfo.tsize; |
| info->wtmult = fsinfo.bsize; |
| info->dtpref = fsinfo.tsize; |
| info->maxfilesize = 0x7FFFFFFF; |
| info->lease_time = 0; |
| out: |
| return status; |
| } |
| |
| static int |
| nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_pathconf *info) |
| { |
| info->max_link = 0; |
| info->max_namelen = NFS2_MAXNAMLEN; |
| return 0; |
| } |
| |
| static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) |
| { |
| if (nfs_async_handle_expired_key(task)) |
| return -EAGAIN; |
| |
| nfs_invalidate_atime(data->inode); |
| if (task->tk_status >= 0) { |
| nfs_refresh_inode(data->inode, data->res.fattr); |
| /* Emulate the eof flag, which isn't normally needed in NFSv2 |
| * as it is guaranteed to always return the file attributes |
| */ |
| if (data->args.offset + data->args.count >= data->res.fattr->size) |
| data->res.eof = 1; |
| } |
| return 0; |
| } |
| |
| static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
| { |
| msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; |
| } |
| |
| static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) |
| { |
| if (nfs_async_handle_expired_key(task)) |
| return -EAGAIN; |
| |
| if (task->tk_status >= 0) |
| nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); |
| return 0; |
| } |
| |
| static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
| { |
| /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ |
| data->args.stable = NFS_FILE_SYNC; |
| msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; |
| } |
| |
| static void nfs_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data) |
| { |
| rpc_call_start(task); |
| } |
| |
| static void |
| nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
| { |
| BUG(); |
| } |
| |
| static int |
| nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) |
| { |
| struct inode *inode = filp->f_path.dentry->d_inode; |
| |
| return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); |
| } |
| |
| /* Helper functions for NFS lock bounds checking */ |
| #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL) |
| static int nfs_lock_check_bounds(const struct file_lock *fl) |
| { |
| __s32 start, end; |
| |
| start = (__s32)fl->fl_start; |
| if ((loff_t)start != fl->fl_start) |
| goto out_einval; |
| |
| if (fl->fl_end != OFFSET_MAX) { |
| end = (__s32)fl->fl_end; |
| if ((loff_t)end != fl->fl_end) |
| goto out_einval; |
| } else |
| end = NFS_LOCK32_OFFSET_MAX; |
| |
| if (start < 0 || start > end) |
| goto out_einval; |
| return 0; |
| out_einval: |
| return -EINVAL; |
| } |
| |
| const struct nfs_rpc_ops nfs_v2_clientops = { |
| .version = 2, /* protocol version */ |
| .dentry_ops = &nfs_dentry_operations, |
| .dir_inode_ops = &nfs_dir_inode_operations, |
| .file_inode_ops = &nfs_file_inode_operations, |
| .file_ops = &nfs_file_operations, |
| .getroot = nfs_proc_get_root, |
| .getattr = nfs_proc_getattr, |
| .setattr = nfs_proc_setattr, |
| .lookup = nfs_proc_lookup, |
| .access = NULL, /* access */ |
| .readlink = nfs_proc_readlink, |
| .create = nfs_proc_create, |
| .remove = nfs_proc_remove, |
| .unlink_setup = nfs_proc_unlink_setup, |
| .unlink_done = nfs_proc_unlink_done, |
| .rename = nfs_proc_rename, |
| .rename_setup = nfs_proc_rename_setup, |
| .rename_done = nfs_proc_rename_done, |
| .link = nfs_proc_link, |
| .symlink = nfs_proc_symlink, |
| .mkdir = nfs_proc_mkdir, |
| .rmdir = nfs_proc_rmdir, |
| .readdir = nfs_proc_readdir, |
| .mknod = nfs_proc_mknod, |
| .statfs = nfs_proc_statfs, |
| .fsinfo = nfs_proc_fsinfo, |
| .pathconf = nfs_proc_pathconf, |
| .decode_dirent = nfs2_decode_dirent, |
| .read_setup = nfs_proc_read_setup, |
| .read_done = nfs_read_done, |
| .write_setup = nfs_proc_write_setup, |
| .write_rpc_prepare = nfs_proc_write_rpc_prepare, |
| .write_done = nfs_write_done, |
| .commit_setup = nfs_proc_commit_setup, |
| .lock = nfs_proc_lock, |
| .lock_check_bounds = nfs_lock_check_bounds, |
| .close_context = nfs_close_context, |
| .init_client = nfs_init_client, |
| }; |