| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * linux/fs/nfs/nfs3proc.c |
| * |
| * Client-side NFSv3 procedures stubs. |
| * |
| * Copyright (C) 1997, Olaf Kirch |
| */ |
| |
| #include <linux/mm.h> |
| #include <linux/errno.h> |
| #include <linux/string.h> |
| #include <linux/sunrpc/clnt.h> |
| #include <linux/slab.h> |
| #include <linux/nfs.h> |
| #include <linux/nfs3.h> |
| #include <linux/nfs_fs.h> |
| #include <linux/nfs_page.h> |
| #include <linux/lockd/bind.h> |
| #include <linux/nfs_mount.h> |
| #include <linux/freezer.h> |
| #include <linux/xattr.h> |
| |
| #include "iostat.h" |
| #include "internal.h" |
| #include "nfs3_fs.h" |
| |
| #define NFSDBG_FACILITY NFSDBG_PROC |
| |
| /* A wrapper to handle the EJUKEBOX error messages */ |
| static int |
| nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) |
| { |
| int res; |
| do { |
| res = rpc_call_sync(clnt, msg, flags); |
| if (res != -EJUKEBOX) |
| break; |
| freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME); |
| res = -ERESTARTSYS; |
| } while (!fatal_signal_pending(current)); |
| return res; |
| } |
| |
| #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags) |
| |
| static int |
| nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode) |
| { |
| if (task->tk_status != -EJUKEBOX) |
| return 0; |
| if (task->tk_status == -EJUKEBOX) |
| nfs_inc_stats(inode, NFSIOS_DELAY); |
| task->tk_status = 0; |
| rpc_restart_call(task); |
| rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); |
| return 1; |
| } |
| |
| static int |
| do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], |
| .rpc_argp = fhandle, |
| .rpc_resp = info, |
| }; |
| int status; |
| |
| dprintk("%s: call fsinfo\n", __func__); |
| nfs_fattr_init(info->fattr); |
| status = rpc_call_sync(client, &msg, 0); |
| dprintk("%s: reply fsinfo: %d\n", __func__, status); |
| if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) { |
| msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; |
| msg.rpc_resp = info->fattr; |
| status = rpc_call_sync(client, &msg, 0); |
| dprintk("%s: reply getattr: %d\n", __func__, status); |
| } |
| return status; |
| } |
| |
| /* |
| * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb |
| */ |
| static int |
| nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| int status; |
| |
| status = do_proc_get_root(server->client, fhandle, info); |
| if (status && server->nfs_client->cl_rpcclient != server->client) |
| status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info); |
| return status; |
| } |
| |
| /* |
| * One function for each procedure in the NFS protocol. |
| */ |
| static int |
| nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fattr *fattr, struct nfs4_label *label, |
| struct inode *inode) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_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 |
| nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| struct iattr *sattr) |
| { |
| struct inode *inode = d_inode(dentry); |
| struct nfs3_sattrargs arg = { |
| .fh = NFS_FH(inode), |
| .sattr = sattr, |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR], |
| .rpc_argp = &arg, |
| .rpc_resp = fattr, |
| }; |
| int status; |
| |
| 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) { |
| if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
| nfs_zap_acl_cache(inode); |
| nfs_setattr_update_inode(inode, sattr, fattr); |
| } |
| dprintk("NFS reply setattr: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs3_proc_lookup(struct inode *dir, const struct qstr *name, |
| struct nfs_fh *fhandle, struct nfs_fattr *fattr, |
| struct nfs4_label *label) |
| { |
| struct nfs3_diropargs arg = { |
| .fh = NFS_FH(dir), |
| .name = name->name, |
| .len = name->len |
| }; |
| struct nfs3_diropres res = { |
| .fh = fhandle, |
| .fattr = fattr |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status; |
| |
| dprintk("NFS call lookup %s\n", name->name); |
| res.dir_attr = nfs_alloc_fattr(); |
| if (res.dir_attr == NULL) |
| return -ENOMEM; |
| |
| nfs_fattr_init(fattr); |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| nfs_refresh_inode(dir, res.dir_attr); |
| if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { |
| msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; |
| msg.rpc_argp = fhandle; |
| msg.rpc_resp = fattr; |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| } |
| nfs_free_fattr(res.dir_attr); |
| dprintk("NFS reply lookup: %d\n", status); |
| return status; |
| } |
| |
| static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| { |
| struct nfs3_accessargs arg = { |
| .fh = NFS_FH(inode), |
| .access = entry->mask, |
| }; |
| struct nfs3_accessres res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| .rpc_cred = entry->cred, |
| }; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call access\n"); |
| res.fattr = nfs_alloc_fattr(); |
| if (res.fattr == NULL) |
| goto out; |
| |
| status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| nfs_refresh_inode(inode, res.fattr); |
| if (status == 0) |
| nfs_access_set_mask(entry, res.access); |
| nfs_free_fattr(res.fattr); |
| out: |
| dprintk("NFS reply access: %d\n", status); |
| return status; |
| } |
| |
| static int nfs3_proc_readlink(struct inode *inode, struct page *page, |
| unsigned int pgbase, unsigned int pglen) |
| { |
| struct nfs_fattr *fattr; |
| struct nfs3_readlinkargs args = { |
| .fh = NFS_FH(inode), |
| .pgbase = pgbase, |
| .pglen = pglen, |
| .pages = &page |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK], |
| .rpc_argp = &args, |
| }; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call readlink\n"); |
| fattr = nfs_alloc_fattr(); |
| if (fattr == NULL) |
| goto out; |
| msg.rpc_resp = fattr; |
| |
| status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| nfs_refresh_inode(inode, fattr); |
| nfs_free_fattr(fattr); |
| out: |
| dprintk("NFS reply readlink: %d\n", status); |
| return status; |
| } |
| |
| struct nfs3_createdata { |
| struct rpc_message msg; |
| union { |
| struct nfs3_createargs create; |
| struct nfs3_mkdirargs mkdir; |
| struct nfs3_symlinkargs symlink; |
| struct nfs3_mknodargs mknod; |
| } arg; |
| struct nfs3_diropres res; |
| struct nfs_fh fh; |
| struct nfs_fattr fattr; |
| struct nfs_fattr dir_attr; |
| }; |
| |
| static struct nfs3_createdata *nfs3_alloc_createdata(void) |
| { |
| struct nfs3_createdata *data; |
| |
| data = kzalloc(sizeof(*data), GFP_KERNEL); |
| if (data != NULL) { |
| data->msg.rpc_argp = &data->arg; |
| data->msg.rpc_resp = &data->res; |
| data->res.fh = &data->fh; |
| data->res.fattr = &data->fattr; |
| data->res.dir_attr = &data->dir_attr; |
| nfs_fattr_init(data->res.fattr); |
| nfs_fattr_init(data->res.dir_attr); |
| } |
| return data; |
| } |
| |
| static struct dentry * |
| nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data) |
| { |
| int status; |
| |
| status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0); |
| nfs_post_op_update_inode(dir, data->res.dir_attr); |
| if (status != 0) |
| return ERR_PTR(status); |
| |
| return nfs_add_or_obtain(dentry, data->res.fh, data->res.fattr, NULL); |
| } |
| |
| static void nfs3_free_createdata(struct nfs3_createdata *data) |
| { |
| kfree(data); |
| } |
| |
| /* |
| * Create a regular file. |
| */ |
| static int |
| nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| int flags) |
| { |
| struct posix_acl *default_acl, *acl; |
| struct nfs3_createdata *data; |
| struct dentry *d_alias; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call create %pd\n", dentry); |
| |
| data = nfs3_alloc_createdata(); |
| if (data == NULL) |
| goto out; |
| |
| data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE]; |
| data->arg.create.fh = NFS_FH(dir); |
| data->arg.create.name = dentry->d_name.name; |
| data->arg.create.len = dentry->d_name.len; |
| data->arg.create.sattr = sattr; |
| |
| data->arg.create.createmode = NFS3_CREATE_UNCHECKED; |
| if (flags & O_EXCL) { |
| data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE; |
| data->arg.create.verifier[0] = cpu_to_be32(jiffies); |
| data->arg.create.verifier[1] = cpu_to_be32(current->pid); |
| } |
| |
| status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); |
| if (status) |
| goto out; |
| |
| for (;;) { |
| d_alias = nfs3_do_create(dir, dentry, data); |
| status = PTR_ERR_OR_ZERO(d_alias); |
| |
| if (status != -ENOTSUPP) |
| break; |
| /* If the server doesn't support the exclusive creation |
| * semantics, try again with simple 'guarded' mode. */ |
| switch (data->arg.create.createmode) { |
| case NFS3_CREATE_EXCLUSIVE: |
| data->arg.create.createmode = NFS3_CREATE_GUARDED; |
| break; |
| |
| case NFS3_CREATE_GUARDED: |
| data->arg.create.createmode = NFS3_CREATE_UNCHECKED; |
| break; |
| |
| case NFS3_CREATE_UNCHECKED: |
| goto out_release_acls; |
| } |
| nfs_fattr_init(data->res.dir_attr); |
| nfs_fattr_init(data->res.fattr); |
| } |
| |
| if (status != 0) |
| goto out_release_acls; |
| |
| if (d_alias) |
| dentry = d_alias; |
| |
| /* When we created the file with exclusive semantics, make |
| * sure we set the attributes afterwards. */ |
| if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) { |
| dprintk("NFS call setattr (post-create)\n"); |
| |
| if (!(sattr->ia_valid & ATTR_ATIME_SET)) |
| sattr->ia_valid |= ATTR_ATIME; |
| if (!(sattr->ia_valid & ATTR_MTIME_SET)) |
| sattr->ia_valid |= ATTR_MTIME; |
| |
| /* Note: we could use a guarded setattr here, but I'm |
| * not sure this buys us anything (and I'd have |
| * to revamp the NFSv3 XDR code) */ |
| status = nfs3_proc_setattr(dentry, data->res.fattr, sattr); |
| nfs_post_op_update_inode(d_inode(dentry), data->res.fattr); |
| dprintk("NFS reply setattr (post-create): %d\n", status); |
| if (status != 0) |
| goto out_dput; |
| } |
| |
| status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); |
| |
| out_dput: |
| dput(d_alias); |
| out_release_acls: |
| posix_acl_release(acl); |
| posix_acl_release(default_acl); |
| out: |
| nfs3_free_createdata(data); |
| dprintk("NFS reply create: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs3_proc_remove(struct inode *dir, struct dentry *dentry) |
| { |
| struct nfs_removeargs arg = { |
| .fh = NFS_FH(dir), |
| .name = dentry->d_name, |
| }; |
| struct nfs_removeres res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call remove %pd2\n", dentry); |
| res.dir_attr = nfs_alloc_fattr(); |
| if (res.dir_attr == NULL) |
| goto out; |
| |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| nfs_post_op_update_inode(dir, res.dir_attr); |
| nfs_free_fattr(res.dir_attr); |
| out: |
| dprintk("NFS reply remove: %d\n", status); |
| return status; |
| } |
| |
| static void |
| nfs3_proc_unlink_setup(struct rpc_message *msg, |
| struct dentry *dentry, |
| struct inode *inode) |
| { |
| msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; |
| } |
| |
| static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) |
| { |
| rpc_call_start(task); |
| } |
| |
| static int |
| nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
| { |
| struct nfs_removeres *res; |
| if (nfs3_async_handle_jukebox(task, dir)) |
| return 0; |
| res = task->tk_msg.rpc_resp; |
| nfs_post_op_update_inode(dir, res->dir_attr); |
| return 1; |
| } |
| |
| static void |
| nfs3_proc_rename_setup(struct rpc_message *msg, |
| struct dentry *old_dentry, |
| struct dentry *new_dentry) |
| { |
| msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME]; |
| } |
| |
| static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) |
| { |
| rpc_call_start(task); |
| } |
| |
| static int |
| nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir, |
| struct inode *new_dir) |
| { |
| struct nfs_renameres *res; |
| |
| if (nfs3_async_handle_jukebox(task, old_dir)) |
| return 0; |
| res = task->tk_msg.rpc_resp; |
| |
| nfs_post_op_update_inode(old_dir, res->old_fattr); |
| nfs_post_op_update_inode(new_dir, res->new_fattr); |
| return 1; |
| } |
| |
| static int |
| nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) |
| { |
| struct nfs3_linkargs arg = { |
| .fromfh = NFS_FH(inode), |
| .tofh = NFS_FH(dir), |
| .toname = name->name, |
| .tolen = name->len |
| }; |
| struct nfs3_linkres res; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_LINK], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| }; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call link %s\n", name->name); |
| res.fattr = nfs_alloc_fattr(); |
| res.dir_attr = nfs_alloc_fattr(); |
| if (res.fattr == NULL || res.dir_attr == NULL) |
| goto out; |
| |
| status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| nfs_post_op_update_inode(dir, res.dir_attr); |
| nfs_post_op_update_inode(inode, res.fattr); |
| out: |
| nfs_free_fattr(res.dir_attr); |
| nfs_free_fattr(res.fattr); |
| dprintk("NFS reply link: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, |
| unsigned int len, struct iattr *sattr) |
| { |
| struct nfs3_createdata *data; |
| struct dentry *d_alias; |
| int status = -ENOMEM; |
| |
| if (len > NFS3_MAXPATHLEN) |
| return -ENAMETOOLONG; |
| |
| dprintk("NFS call symlink %pd\n", dentry); |
| |
| data = nfs3_alloc_createdata(); |
| if (data == NULL) |
| goto out; |
| data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK]; |
| data->arg.symlink.fromfh = NFS_FH(dir); |
| data->arg.symlink.fromname = dentry->d_name.name; |
| data->arg.symlink.fromlen = dentry->d_name.len; |
| data->arg.symlink.pages = &page; |
| data->arg.symlink.pathlen = len; |
| data->arg.symlink.sattr = sattr; |
| |
| d_alias = nfs3_do_create(dir, dentry, data); |
| status = PTR_ERR_OR_ZERO(d_alias); |
| |
| if (status == 0) |
| dput(d_alias); |
| |
| nfs3_free_createdata(data); |
| out: |
| dprintk("NFS reply symlink: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) |
| { |
| struct posix_acl *default_acl, *acl; |
| struct nfs3_createdata *data; |
| struct dentry *d_alias; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call mkdir %pd\n", dentry); |
| |
| data = nfs3_alloc_createdata(); |
| if (data == NULL) |
| goto out; |
| |
| status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); |
| if (status) |
| goto out; |
| |
| data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR]; |
| data->arg.mkdir.fh = NFS_FH(dir); |
| data->arg.mkdir.name = dentry->d_name.name; |
| data->arg.mkdir.len = dentry->d_name.len; |
| data->arg.mkdir.sattr = sattr; |
| |
| d_alias = nfs3_do_create(dir, dentry, data); |
| status = PTR_ERR_OR_ZERO(d_alias); |
| |
| if (status != 0) |
| goto out_release_acls; |
| |
| if (d_alias) |
| dentry = d_alias; |
| |
| status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); |
| |
| dput(d_alias); |
| out_release_acls: |
| posix_acl_release(acl); |
| posix_acl_release(default_acl); |
| out: |
| nfs3_free_createdata(data); |
| dprintk("NFS reply mkdir: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs3_proc_rmdir(struct inode *dir, const struct qstr *name) |
| { |
| struct nfs_fattr *dir_attr; |
| struct nfs3_diropargs arg = { |
| .fh = NFS_FH(dir), |
| .name = name->name, |
| .len = name->len |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR], |
| .rpc_argp = &arg, |
| }; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call rmdir %s\n", name->name); |
| dir_attr = nfs_alloc_fattr(); |
| if (dir_attr == NULL) |
| goto out; |
| |
| msg.rpc_resp = dir_attr; |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| nfs_post_op_update_inode(dir, dir_attr); |
| nfs_free_fattr(dir_attr); |
| out: |
| dprintk("NFS reply rmdir: %d\n", status); |
| return status; |
| } |
| |
| /* |
| * The READDIR implementation is somewhat hackish - we pass the user buffer |
| * to the encode function, which installs it in the receive iovec. |
| * The decode function itself doesn't perform any decoding, it just makes |
| * sure the reply is syntactically correct. |
| * |
| * Also note that this implementation handles both plain readdir and |
| * readdirplus. |
| */ |
| static int |
| nfs3_proc_readdir(struct dentry *dentry, const struct cred *cred, |
| u64 cookie, struct page **pages, unsigned int count, bool plus) |
| { |
| struct inode *dir = d_inode(dentry); |
| __be32 *verf = NFS_I(dir)->cookieverf; |
| struct nfs3_readdirargs arg = { |
| .fh = NFS_FH(dir), |
| .cookie = cookie, |
| .verf = {verf[0], verf[1]}, |
| .plus = plus, |
| .count = count, |
| .pages = pages |
| }; |
| struct nfs3_readdirres res = { |
| .verf = verf, |
| .plus = plus |
| }; |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], |
| .rpc_argp = &arg, |
| .rpc_resp = &res, |
| .rpc_cred = cred, |
| }; |
| int status = -ENOMEM; |
| |
| if (plus) |
| msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; |
| |
| dprintk("NFS call readdir%s %d\n", |
| plus? "plus" : "", (unsigned int) cookie); |
| |
| res.dir_attr = nfs_alloc_fattr(); |
| if (res.dir_attr == NULL) |
| goto out; |
| |
| status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| |
| nfs_invalidate_atime(dir); |
| nfs_refresh_inode(dir, res.dir_attr); |
| |
| nfs_free_fattr(res.dir_attr); |
| out: |
| dprintk("NFS reply readdir%s: %d\n", |
| plus? "plus" : "", status); |
| return status; |
| } |
| |
| static int |
| nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
| dev_t rdev) |
| { |
| struct posix_acl *default_acl, *acl; |
| struct nfs3_createdata *data; |
| struct dentry *d_alias; |
| int status = -ENOMEM; |
| |
| dprintk("NFS call mknod %pd %u:%u\n", dentry, |
| MAJOR(rdev), MINOR(rdev)); |
| |
| data = nfs3_alloc_createdata(); |
| if (data == NULL) |
| goto out; |
| |
| status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); |
| if (status) |
| goto out; |
| |
| data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD]; |
| data->arg.mknod.fh = NFS_FH(dir); |
| data->arg.mknod.name = dentry->d_name.name; |
| data->arg.mknod.len = dentry->d_name.len; |
| data->arg.mknod.sattr = sattr; |
| data->arg.mknod.rdev = rdev; |
| |
| switch (sattr->ia_mode & S_IFMT) { |
| case S_IFBLK: |
| data->arg.mknod.type = NF3BLK; |
| break; |
| case S_IFCHR: |
| data->arg.mknod.type = NF3CHR; |
| break; |
| case S_IFIFO: |
| data->arg.mknod.type = NF3FIFO; |
| break; |
| case S_IFSOCK: |
| data->arg.mknod.type = NF3SOCK; |
| break; |
| default: |
| status = -EINVAL; |
| goto out_release_acls; |
| } |
| |
| d_alias = nfs3_do_create(dir, dentry, data); |
| status = PTR_ERR_OR_ZERO(d_alias); |
| if (status != 0) |
| goto out_release_acls; |
| |
| if (d_alias) |
| dentry = d_alias; |
| |
| status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); |
| |
| dput(d_alias); |
| out_release_acls: |
| posix_acl_release(acl); |
| posix_acl_release(default_acl); |
| out: |
| nfs3_free_createdata(data); |
| dprintk("NFS reply mknod: %d\n", status); |
| return status; |
| } |
| |
| static int |
| nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsstat *stat) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT], |
| .rpc_argp = fhandle, |
| .rpc_resp = stat, |
| }; |
| int status; |
| |
| dprintk("NFS call fsstat\n"); |
| nfs_fattr_init(stat->fattr); |
| status = rpc_call_sync(server->client, &msg, 0); |
| dprintk("NFS reply fsstat: %d\n", status); |
| return status; |
| } |
| |
| static int |
| do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], |
| .rpc_argp = fhandle, |
| .rpc_resp = info, |
| }; |
| int status; |
| |
| dprintk("NFS call fsinfo\n"); |
| nfs_fattr_init(info->fattr); |
| status = rpc_call_sync(client, &msg, 0); |
| dprintk("NFS reply fsinfo: %d\n", status); |
| return status; |
| } |
| |
| /* |
| * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via |
| * nfs_create_server |
| */ |
| static int |
| nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_fsinfo *info) |
| { |
| int status; |
| |
| status = do_proc_fsinfo(server->client, fhandle, info); |
| if (status && server->nfs_client->cl_rpcclient != server->client) |
| status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info); |
| return status; |
| } |
| |
| static int |
| nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| struct nfs_pathconf *info) |
| { |
| struct rpc_message msg = { |
| .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF], |
| .rpc_argp = fhandle, |
| .rpc_resp = info, |
| }; |
| int status; |
| |
| dprintk("NFS call pathconf\n"); |
| nfs_fattr_init(info->fattr); |
| status = rpc_call_sync(server->client, &msg, 0); |
| dprintk("NFS reply pathconf: %d\n", status); |
| return status; |
| } |
| |
| static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) |
| { |
| struct inode *inode = hdr->inode; |
| struct nfs_server *server = NFS_SERVER(inode); |
| |
| if (hdr->pgio_done_cb != NULL) |
| return hdr->pgio_done_cb(task, hdr); |
| |
| if (nfs3_async_handle_jukebox(task, inode)) |
| return -EAGAIN; |
| |
| if (task->tk_status >= 0 && !server->read_hdrsize) |
| cmpxchg(&server->read_hdrsize, 0, hdr->res.replen); |
| |
| nfs_invalidate_atime(inode); |
| nfs_refresh_inode(inode, &hdr->fattr); |
| return 0; |
| } |
| |
| static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr, |
| struct rpc_message *msg) |
| { |
| msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ]; |
| hdr->args.replen = NFS_SERVER(hdr->inode)->read_hdrsize; |
| } |
| |
| static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task, |
| struct nfs_pgio_header *hdr) |
| { |
| rpc_call_start(task); |
| return 0; |
| } |
| |
| static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) |
| { |
| struct inode *inode = hdr->inode; |
| |
| if (hdr->pgio_done_cb != NULL) |
| return hdr->pgio_done_cb(task, hdr); |
| |
| if (nfs3_async_handle_jukebox(task, inode)) |
| return -EAGAIN; |
| if (task->tk_status >= 0) |
| nfs_writeback_update_inode(hdr); |
| return 0; |
| } |
| |
| static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr, |
| struct rpc_message *msg, |
| struct rpc_clnt **clnt) |
| { |
| msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE]; |
| } |
| |
| static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) |
| { |
| rpc_call_start(task); |
| } |
| |
| static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data) |
| { |
| if (data->commit_done_cb != NULL) |
| return data->commit_done_cb(task, data); |
| |
| if (nfs3_async_handle_jukebox(task, data->inode)) |
| return -EAGAIN; |
| nfs_refresh_inode(data->inode, data->res.fattr); |
| return 0; |
| } |
| |
| static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, |
| struct rpc_clnt **clnt) |
| { |
| msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT]; |
| } |
| |
| static void nfs3_nlm_alloc_call(void *data) |
| { |
| struct nfs_lock_context *l_ctx = data; |
| if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) { |
| get_nfs_open_context(l_ctx->open_context); |
| nfs_get_lock_context(l_ctx->open_context); |
| } |
| } |
| |
| static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data) |
| { |
| struct nfs_lock_context *l_ctx = data; |
| if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) |
| return nfs_async_iocounter_wait(task, l_ctx); |
| return false; |
| |
| } |
| |
| static void nfs3_nlm_release_call(void *data) |
| { |
| struct nfs_lock_context *l_ctx = data; |
| struct nfs_open_context *ctx; |
| if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) { |
| ctx = l_ctx->open_context; |
| nfs_put_lock_context(l_ctx); |
| put_nfs_open_context(ctx); |
| } |
| } |
| |
| static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = { |
| .nlmclnt_alloc_call = nfs3_nlm_alloc_call, |
| .nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare, |
| .nlmclnt_release_call = nfs3_nlm_release_call, |
| }; |
| |
| static int |
| nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) |
| { |
| struct inode *inode = file_inode(filp); |
| struct nfs_lock_context *l_ctx = NULL; |
| struct nfs_open_context *ctx = nfs_file_open_context(filp); |
| int status; |
| |
| if (fl->fl_flags & FL_CLOSE) { |
| l_ctx = nfs_get_lock_context(ctx); |
| if (IS_ERR(l_ctx)) |
| l_ctx = NULL; |
| else |
| set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); |
| } |
| |
| status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx); |
| |
| if (l_ctx) |
| nfs_put_lock_context(l_ctx); |
| |
| return status; |
| } |
| |
| static int nfs3_have_delegation(struct inode *inode, fmode_t flags) |
| { |
| return 0; |
| } |
| |
| static const struct inode_operations nfs3_dir_inode_operations = { |
| .create = nfs_create, |
| .lookup = nfs_lookup, |
| .link = nfs_link, |
| .unlink = nfs_unlink, |
| .symlink = nfs_symlink, |
| .mkdir = nfs_mkdir, |
| .rmdir = nfs_rmdir, |
| .mknod = nfs_mknod, |
| .rename = nfs_rename, |
| .permission = nfs_permission, |
| .getattr = nfs_getattr, |
| .setattr = nfs_setattr, |
| #ifdef CONFIG_NFS_V3_ACL |
| .listxattr = nfs3_listxattr, |
| .get_acl = nfs3_get_acl, |
| .set_acl = nfs3_set_acl, |
| #endif |
| }; |
| |
| static const struct inode_operations nfs3_file_inode_operations = { |
| .permission = nfs_permission, |
| .getattr = nfs_getattr, |
| .setattr = nfs_setattr, |
| #ifdef CONFIG_NFS_V3_ACL |
| .listxattr = nfs3_listxattr, |
| .get_acl = nfs3_get_acl, |
| .set_acl = nfs3_set_acl, |
| #endif |
| }; |
| |
| const struct nfs_rpc_ops nfs_v3_clientops = { |
| .version = 3, /* protocol version */ |
| .dentry_ops = &nfs_dentry_operations, |
| .dir_inode_ops = &nfs3_dir_inode_operations, |
| .file_inode_ops = &nfs3_file_inode_operations, |
| .file_ops = &nfs_file_operations, |
| .nlmclnt_ops = &nlmclnt_fl_close_lock_ops, |
| .getroot = nfs3_proc_get_root, |
| .submount = nfs_submount, |
| .try_mount = nfs_try_mount, |
| .getattr = nfs3_proc_getattr, |
| .setattr = nfs3_proc_setattr, |
| .lookup = nfs3_proc_lookup, |
| .access = nfs3_proc_access, |
| .readlink = nfs3_proc_readlink, |
| .create = nfs3_proc_create, |
| .remove = nfs3_proc_remove, |
| .unlink_setup = nfs3_proc_unlink_setup, |
| .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare, |
| .unlink_done = nfs3_proc_unlink_done, |
| .rename_setup = nfs3_proc_rename_setup, |
| .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare, |
| .rename_done = nfs3_proc_rename_done, |
| .link = nfs3_proc_link, |
| .symlink = nfs3_proc_symlink, |
| .mkdir = nfs3_proc_mkdir, |
| .rmdir = nfs3_proc_rmdir, |
| .readdir = nfs3_proc_readdir, |
| .mknod = nfs3_proc_mknod, |
| .statfs = nfs3_proc_statfs, |
| .fsinfo = nfs3_proc_fsinfo, |
| .pathconf = nfs3_proc_pathconf, |
| .decode_dirent = nfs3_decode_dirent, |
| .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare, |
| .read_setup = nfs3_proc_read_setup, |
| .read_done = nfs3_read_done, |
| .write_setup = nfs3_proc_write_setup, |
| .write_done = nfs3_write_done, |
| .commit_setup = nfs3_proc_commit_setup, |
| .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare, |
| .commit_done = nfs3_commit_done, |
| .lock = nfs3_proc_lock, |
| .clear_acl_cache = forget_all_cached_acls, |
| .close_context = nfs_close_context, |
| .have_delegation = nfs3_have_delegation, |
| .alloc_client = nfs_alloc_client, |
| .init_client = nfs_init_client, |
| .free_client = nfs_free_client, |
| .create_server = nfs3_create_server, |
| .clone_server = nfs3_clone_server, |
| }; |