litmus-rt.git - The LITMUS^RT kernel.

diff options

author	Takashi Iwai <tiwai@suse.de>	2005-11-17 11:24:26 -0500
committer	Jaroslav Kysela <perex@suse.cz>	2006-01-03 06:28:53 -0500
commit	a4efc230c60ad15584e723755316e67b3c708d67 (patch)
tree	8b81a5e7c079ea5e06279f08ba1d6d4ce4d31dcb
parent	27441127b086230cc4c57d6cd9a615272fb47bcd (diff)

[ALSA] document - Add PM support

Modules: Documentation Mark the drivers newly supporting PM in the documentation. Signed-off-by: Takashi Iwai <tiwai@suse.de>

Diffstat

-rw-r--r--

Documentation/sound/alsa/ALSA-Configuration.txt

1 files changed, 52 insertions, 0 deletions

     Module supports up to 8 cards. This module does not support autoprobe
     thus main port must be specified!!! Other ports are optional.
+    The power-management is supported.
   Module snd-ad1889
   -----------------
     Module supports up to 8 cards, autoprobe and PnP.
+    The power-management is supported.
   Module snd-als4000
   ------------------
     Module supports up to 8 cards, autoprobe and PnP.
+    The power-management is supported.
   Module snd-atiixp
   -----------------
     implementation depends on the motherboard, and you'll need to
     choose the correct one via spdif_aclink module option.
+    The power-management is supported.
   Module snd-atiixp-modem
   -----------------------
     Note: The default index value of this module is -2, i.e. the first
           slot is excluded.
+    The power-management is supported.
   Module snd-au8810, snd-au8820, snd-au8830
   -----------------------------------------
     Module supports up to 8 cards, PnP and autoprobe.
+    The power-management is supported.
   Module snd-azt3328
   ------------------
     Module supports up to 8 cards and autoprobe.
+    The power-management is supported.
   Module snd-cmipci
   -----------------
     Module supports autoprobe and multiple chips (max 8).
+    The power-management is supported.
   Module snd-cs4231
   -----------------
     Module supports up to 8 cards.  This module is enabled only with
     ISA PnP support.
+    The power-management is supported.
   Module snd-dummy
   ----------------
     or input, but you may use this module for any application which
     requires a sound card (like RealPlayer).
+    The power-management is supported.
   Module snd-emu10k1
   ------------------
         * Creative Card 5.1 (c) 2003                    [0x3fc3/0x7cff]
         * Creative Card all ins and outs                [0x3fff/0x7fff]
+    The power-management is supported.
   Module snd-emu10k1x
   -------------------
     Module supports up to 8 cards, PnP and autoprobe.
+    The power-management is supported.
   Module snd-es1688
   -----------------
     Module supports up to 8 cards and autoprobe.
+    The power-management is supported.
   Module snd-es1968
   -----------------
     Module supports up to 8 cards and autoprobe.
+    The power-management is supported.
   Module snd-gusclassic
   ---------------------
             (Usually SD_LPLIB register is more accurate than the
             position buffer.)
+    The power-management is supported.
   Module snd-hdsp
   ---------------
     Note: The default index value of this module is -2, i.e. the first
           slot is excluded.
+    The power-management is supported.
   Module snd-interwave
   --------------------
     For ARM architecture only.
+    The power-management is supported.
   Module snd-rme32
   ----------------
     Module supports only one card.
     Module has no enable and index options.
+    The power-management is supported.
   Module snd-sb8
   --------------
     Module supports up to 8 cards and autoprobe.
+    The power-management is supported.
   Module snd-sb16 and snd-sbawe
   -----------------------------
           half duplex mode through 8-bit DMA channel by disabling their
           16-bit DMA channel.
+    The power-management is supported.
   Module snd-sgalaxy
   ------------------
     Module supports up to 8 cards.
+    The power-management is supported.
   Module snd-sscape
   -----------------
     Note: for the MPU401 on VIA823x, use snd-mpu401 driver
           additionally.  The mpu_port option is for VIA686 chips only.
+    The power-management is supported.
   Module snd-via82xx-modem
   ------------------------
     Note: The default index value of this module is -2, i.e. the first
           slot is excluded.
+    The power-management is supported.
   Module snd-virmidi
   ------------------
     size is chosen.  The possible IBL values can be found in
     /proc/asound/cardX/vx-status proc file.
+    The power-management is supported.
   Module snd-vxpocket
   -------------------
     Note2: snd-vxp440 driver is merged to snd-vxpocket driver since
            ALSA 1.0.10.
+    The power-management is supported.
   Module snd-ymfpci
   -----------------
     Note: the driver is build only when CONFIG_ISA is set.
+    The power-management is supported.
 AC97 Quirk Option
 =================

/* * 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" #include "internal.h" #include "iostat.h" #define NFSDBG_FACILITY NFSDBG_PROC #define NFS4_POLL_RETRY_MIN (HZ/10) #define NFS4_POLL_RETRY_MAX (15*HZ) struct nfs4_opendata; static int _nfs4_proc_open(struct nfs4_opendata *data); static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); /* Prevent leaks of NFSv4 errors into userland */ static int nfs4_map_errors(int err) { if (err < -1000) { dprintk("%s could not handle NFSv4 error %d\n", __func__, -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 }; const u32 nfs4_fs_locations_bitmap[2] = { FATTR4_WORD0_TYPE | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_FSID | FATTR4_WORD0_FILEID | FATTR4_WORD0_FS_LOCATIONS, FATTR4_WORD1_MODE | FATTR4_WORD1_NUMLINKS | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_MOUNTED_ON_FILEID }; static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, struct nfs4_readdir_arg *readdir) { __be32 *start, *p; 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 = 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, NFS_FILEID(dentry->d_inode)); } *p++ = xdr_one; /* next */ *p++ = xdr_zero; /* cookie, first word */ *p++ = xdr_two; /* cookie, second word */ *p++ = xdr_two; /* entry len */ memcpy(p, "..\0\0", 4); /* entry */ p++; *p++ = xdr_one; /* bitmap length */ *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ *p++ = htonl(8); /* attribute buffer length */ p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); readdir->pgbase = (char *)p - (char *)start; readdir->count -= readdir->pgbase; kunmap_atomic(start, KM_USER0); } static int nfs4_wait_clnt_recover(struct nfs_client *clp) { int res; might_sleep(); res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, nfs_wait_bit_killable, TASK_KILLABLE); return res; } static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) { int res = 0; might_sleep(); if (*timeout <= 0) *timeout = NFS4_POLL_RETRY_MIN; if (*timeout > NFS4_POLL_RETRY_MAX) *timeout = NFS4_POLL_RETRY_MAX; schedule_timeout_killable(*timeout); if (fatal_signal_pending(current)) res = -ERESTARTSYS; *timeout <<= 1; return res; } /* This is the error handling routine for processes that are allowed * to sleep. */ static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) { struct nfs_client *clp = server->nfs_client; struct nfs4_state *state = exception->state; int ret = errorcode; exception->retry = 0; switch(errorcode) { case 0: return 0; case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_BAD_STATEID: case -NFS4ERR_OPENMODE: if (state == NULL) break; nfs4_state_mark_reclaim_nograce(clp, state); case -NFS4ERR_STALE_CLIENTID: case -NFS4ERR_STALE_STATEID: case -NFS4ERR_EXPIRED: nfs4_schedule_state_recovery(clp); ret = nfs4_wait_clnt_recover(clp); if (ret == 0) exception->retry = 1; break; case -NFS4ERR_FILE_OPEN: 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); } static void renew_lease(const struct nfs_server *server, unsigned long timestamp) { struct nfs_client *clp = server->nfs_client; 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 *dir, struct nfs4_change_info *cinfo) { struct nfs_inode *nfsi = NFS_I(dir); spin_lock(&dir->i_lock); nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; if (!cinfo->atomic || cinfo->before != nfsi->change_attr) nfs_force_lookup_revalidate(dir); nfsi->change_attr = cinfo->after; spin_unlock(&dir->i_lock); } struct nfs4_opendata { struct kref kref; struct nfs_openargs o_arg; struct nfs_openres o_res; struct nfs_open_confirmargs c_arg; struct nfs_open_confirmres c_res; struct nfs_fattr f_attr; struct nfs_fattr dir_attr; struct path path; struct dentry *dir; struct nfs4_state_owner *owner; struct nfs4_state *state; struct iattr attrs; unsigned long timestamp; unsigned int rpc_done : 1; int rpc_status; int cancelled; }; static void nfs4_init_opendata_res(struct nfs4_opendata *p) { p->o_res.f_attr = &p->f_attr; p->o_res.dir_attr = &p->dir_attr; p->o_res.seqid = p->o_arg.seqid; p->c_res.seqid = p->c_arg.seqid; p->o_res.server = p->o_arg.server; nfs_fattr_init(&p->f_attr); nfs_fattr_init(&p->dir_attr); } static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, struct nfs4_state_owner *sp, fmode_t fmode, int flags, const struct iattr *attrs) { struct dentry *parent = dget_parent(path->dentry); struct inode *dir = parent->d_inode; struct nfs_server *server = NFS_SERVER(dir); struct nfs4_opendata *p; p = kzalloc(sizeof(*p), GFP_KERNEL); if (p == NULL) goto err; p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); if (p->o_arg.seqid == NULL) goto err_free; p->path.mnt = mntget(path->mnt); p->path.dentry = dget(path->dentry); p->dir = parent; p->owner = sp; atomic_inc(&sp->so_count); p->o_arg.fh = NFS_FH(dir); p->o_arg.open_flags = flags; p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); p->o_arg.clientid = server->nfs_client->cl_clientid; p->o_arg.id = sp->so_owner_id.id; p->o_arg.name = &p->path.dentry->d_name; p->o_arg.server = server; p->o_arg.bitmask = server->attr_bitmask; p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; if (flags & O_EXCL) { u32 *s = (u32 *) p->o_arg.u.verifier.data; s[0] = jiffies; s[1] = current->pid; } else if (flags & O_CREAT) { p->o_arg.u.attrs = &p->attrs; memcpy(&p->attrs, attrs, sizeof(p->attrs)); } p->c_arg.fh = &p->o_res.fh; p->c_arg.stateid = &p->o_res.stateid; p->c_arg.seqid = p->o_arg.seqid; nfs4_init_opendata_res(p); kref_init(&p->kref); return p; err_free: kfree(p); err: dput(parent); return NULL; } static void nfs4_opendata_free(struct kref *kref) { struct nfs4_opendata *p = container_of(kref, struct nfs4_opendata, kref); nfs_free_seqid(p->o_arg.seqid); if (p->state != NULL) nfs4_put_open_state(p->state); nfs4_put_state_owner(p->owner); dput(p->dir); path_put(&p->path); kfree(p); } static void nfs4_opendata_put(struct nfs4_opendata *p) { if (p != NULL) kref_put(&p->kref, nfs4_opendata_free); } static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) { int ret; ret = rpc_wait_for_completion_task(task); return ret; } static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) { int ret = 0; if (open_mode & O_EXCL) goto out; switch (mode & (FMODE_READ|FMODE_WRITE)) { case FMODE_READ: ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0; break; case FMODE_WRITE: ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0; break; case FMODE_READ|FMODE_WRITE: ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0; } out: return ret; } static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) { if ((delegation->type & fmode) != fmode) return 0; if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) return 0; nfs_mark_delegation_referenced(delegation); return 1; } static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) { switch (fmode) { case FMODE_WRITE: state->n_wronly++; break; case FMODE_READ: state->n_rdonly++; break; case FMODE_READ|FMODE_WRITE: state->n_rdwr++; } nfs4_state_set_mode_locked(state, state->state | fmode); } static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) { if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); switch (fmode) { case FMODE_READ: set_bit(NFS_O_RDONLY_STATE, &state->flags); break; case FMODE_WRITE: set_bit(NFS_O_WRONLY_STATE, &state->flags); break; case FMODE_READ|FMODE_WRITE: set_bit(NFS_O_RDWR_STATE, &state->flags); } } static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) { write_seqlock(&state->seqlock); nfs_set_open_stateid_locked(state, stateid, fmode); write_sequnlock(&state->seqlock); } static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) { /* * Protect the call to nfs4_state_set_mode_locked and * serialise the stateid update */ write_seqlock(&state->seqlock); if (deleg_stateid != NULL) { memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); set_bit(NFS_DELEGATED_STATE, &state->flags); } if (open_stateid != NULL) nfs_set_open_stateid_locked(state, open_stateid, fmode); write_sequnlock(&state->seqlock); spin_lock(&state->owner->so_lock); update_open_stateflags(state, fmode); spin_unlock(&state->owner->so_lock); } static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) { struct nfs_inode *nfsi = NFS_I(state->inode); struct nfs_delegation *deleg_cur; int ret = 0; fmode &= (FMODE_READ|FMODE_WRITE); rcu_read_lock(); deleg_cur = rcu_dereference(nfsi->delegation); if (deleg_cur == NULL) goto no_delegation; spin_lock(&deleg_cur->lock); if (nfsi->delegation != deleg_cur || (deleg_cur->type & fmode) != fmode) goto no_delegation_unlock; if (delegation == NULL) delegation = &deleg_cur->stateid; else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) goto no_delegation_unlock; nfs_mark_delegation_referenced(deleg_cur); __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); ret = 1; no_delegation_unlock: spin_unlock(&deleg_cur->lock); no_delegation: rcu_read_unlock(); if (!ret && open_stateid != NULL) { __update_open_stateid(state, open_stateid, NULL, fmode); ret = 1; } return ret; } static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) { struct nfs_delegation *delegation; rcu_read_lock(); delegation = rcu_dereference(NFS_I(inode)->delegation); if (delegation == NULL || (delegation->type & fmode) == fmode) { rcu_read_unlock(); return; } rcu_read_unlock(); nfs_inode_return_delegation(inode); } static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) { struct nfs4_state *state = opendata->state; struct nfs_inode *nfsi = NFS_I(state->inode); struct nfs_delegation *delegation; int open_mode = opendata->o_arg.open_flags & O_EXCL; fmode_t fmode = opendata->o_arg.fmode; nfs4_stateid stateid; int ret = -EAGAIN; for (;;) { if (can_open_cached(state, fmode, open_mode)) { spin_lock(&state->owner->so_lock); if (can_open_cached(state, fmode, open_mode)) { update_open_stateflags(state, fmode); spin_unlock(&state->owner->so_lock); goto out_return_state; } spin_unlock(&state->owner->so_lock); } rcu_read_lock(); delegation = rcu_dereference(nfsi->delegation); if (delegation == NULL || !can_open_delegated(delegation, fmode)) { rcu_read_unlock(); break; } /* Save the delegation */ memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); rcu_read_unlock(); ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); if (ret != 0) goto out; ret = -EAGAIN; /* Try to update the stateid using the delegation */ if (update_open_stateid(state, NULL, &stateid, fmode)) goto out_return_state; } out: return ERR_PTR(ret); out_return_state: atomic_inc(&state->count); return state; } static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) { struct inode *inode; struct nfs4_state *state = NULL; struct nfs_delegation *delegation; int ret; if (!data->rpc_done) { state = nfs4_try_open_cached(data); goto out; } ret = -EAGAIN; if (!(data->f_attr.valid & NFS_ATTR_FATTR)) goto err; inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); ret = PTR_ERR(inode); if (IS_ERR(inode)) goto err; ret = -ENOMEM; state = nfs4_get_open_state(inode, data->owner); if (state == NULL) goto err_put_inode; if (data->o_res.delegation_type != 0) { int delegation_flags = 0; rcu_read_lock(); delegation = rcu_dereference(NFS_I(inode)->delegation); if (delegation) delegation_flags = delegation->flags; rcu_read_unlock(); if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) nfs_inode_set_delegation(state->inode, data->owner->so_cred, &data->o_res); else nfs_inode_reclaim_delegation(state->inode, data->owner->so_cred, &data->o_res); } update_open_stateid(state, &data->o_res.stateid, NULL, data->o_arg.fmode); iput(inode); out: return state; err_put_inode: iput(inode); err: return ERR_PTR(ret); } static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) { struct nfs_inode *nfsi = NFS_I(state->inode); struct nfs_open_context *ctx; spin_lock(&state->inode->i_lock); list_for_each_entry(ctx, &nfsi->open_files, list) { if (ctx->state != state) continue; get_nfs_open_context(ctx); spin_unlock(&state->inode->i_lock); return ctx; } spin_unlock(&state->inode->i_lock); return ERR_PTR(-ENOENT); } static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) { struct nfs4_opendata *opendata; opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); if (opendata == NULL) return ERR_PTR(-ENOMEM); opendata->state = state; atomic_inc(&state->count); return opendata; } static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) { struct nfs4_state *newstate; int ret; opendata->o_arg.open_flags = 0; opendata->o_arg.fmode = fmode; memset(&opendata->o_res, 0, sizeof(opendata->o_res)); memset(&opendata->c_res, 0, sizeof(opendata->c_res)); nfs4_init_opendata_res(opendata); ret = _nfs4_proc_open(opendata); if (ret != 0) return ret; newstate = nfs4_opendata_to_nfs4_state(opendata); if (IS_ERR(newstate)) return PTR_ERR(newstate); nfs4_close_state(&opendata->path, newstate, fmode); *res = newstate; return 0; } static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) { struct nfs4_state *newstate; int ret; /* memory barrier prior to reading state->n_* */ clear_bit(NFS_DELEGATED_STATE, &state->flags); smp_rmb(); if (state->n_rdwr != 0) { ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); if (ret != 0) return ret; if (newstate != state) return -ESTALE; } if (state->n_wronly != 0) { ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); if (ret != 0) return ret; if (newstate != state) return -ESTALE; } if (state->n_rdonly != 0) { ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); if (ret != 0) return ret; if (newstate != state) return -ESTALE; } /* * We may have performed cached opens for all three recoveries. * Check if we need to update the current stateid. */ if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { write_seqlock(&state->seqlock); if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); write_sequnlock(&state->seqlock); } return 0; } /* * OPEN_RECLAIM: * reclaim state on the server after a reboot. */ static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) { struct nfs_delegation *delegation; struct nfs4_opendata *opendata; fmode_t delegation_type = 0; int status; opendata = nfs4_open_recoverdata_alloc(ctx, state); if (IS_ERR(opendata)) return PTR_ERR(opendata); opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; opendata->o_arg.fh = NFS_FH(state->inode); rcu_read_lock(); delegation = rcu_dereference(NFS_I(state->inode)->delegation); if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) delegation_type = delegation->type; rcu_read_unlock(); opendata->o_arg.u.delegation_type = delegation_type; status = nfs4_open_recover(opendata, state); nfs4_opendata_put(opendata); return status; } static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) { struct nfs_server *server = NFS_SERVER(state->inode); struct nfs4_exception exception = { }; int err; do { err = _nfs4_do_open_reclaim(ctx, state); if (err != -NFS4ERR_DELAY) break; nfs4_handle_exception(server, err, &exception); } while (exception.retry); return err; } static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) { struct nfs_open_context *ctx; int ret; ctx = nfs4_state_find_open_context(state); if (IS_ERR(ctx)) return PTR_ERR(ctx); ret = nfs4_do_open_reclaim(ctx, state); put_nfs_open_context(ctx); return ret; } static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) { struct nfs4_opendata *opendata; int ret; opendata = nfs4_open_recoverdata_alloc(ctx, state); if (IS_ERR(opendata)) return PTR_ERR(opendata); opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; memcpy(opendata->o_arg.u.delegation.data, stateid->data, sizeof(opendata->o_arg.u.delegation.data)); ret = nfs4_open_recover(opendata, state); nfs4_opendata_put(opendata); return ret; } int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) { struct nfs4_exception exception = { }; struct nfs_server *server = NFS_SERVER(state->inode); int err; do { err = _nfs4_open_delegation_recall(ctx, state, stateid); switch (err) { case 0: case -ENOENT: case -ESTALE: goto out; 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->nfs_client); goto out; case -ERESTARTSYS: /* * The show must go on: exit, but mark the * stateid as needing recovery. */ case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_BAD_STATEID: nfs4_state_mark_reclaim_nograce(server->nfs_client, state); case -ENOMEM: err = 0; goto out; } err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); out: return err; } static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) { struct nfs4_opendata *data = calldata; data->rpc_status = task->tk_status; if (RPC_ASSASSINATED(task)) return; if (data->rpc_status == 0) { memcpy(data->o_res.stateid.data, data->c_res.stateid.data, sizeof(data->o_res.stateid.data)); nfs_confirm_seqid(&data->owner->so_seqid, 0); renew_lease(data->o_res.server, data->timestamp); data->rpc_done = 1; } } static void nfs4_open_confirm_release(void *calldata) { struct nfs4_opendata *data = calldata; struct nfs4_state *state = NULL; /* If this request hasn't been cancelled, do nothing */ if (data->cancelled == 0) goto out_free; /* In case of error, no cleanup! */ if (!data->rpc_done) goto out_free; state = nfs4_opendata_to_nfs4_state(data); if (!IS_ERR(state)) nfs4_close_state(&data->path, state, data->o_arg.fmode); out_free: nfs4_opendata_put(data); } static const struct rpc_call_ops nfs4_open_confirm_ops = { .rpc_call_done = nfs4_open_confirm_done, .rpc_release = nfs4_open_confirm_release, }; /* * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata */ static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) { struct nfs_server *server = NFS_SERVER(data->dir->d_inode); struct rpc_task *task; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], .rpc_argp = &data->c_arg, .rpc_resp = &data->c_res, .rpc_cred = data->owner->so_cred, }; struct rpc_task_setup task_setup_data = { .rpc_client = server->client, .rpc_message = &msg, .callback_ops = &nfs4_open_confirm_ops, .callback_data = data, .workqueue = nfsiod_workqueue, .flags = RPC_TASK_ASYNC, }; int status; kref_get(&data->kref); data->rpc_done = 0; data->rpc_status = 0; data->timestamp = jiffies; task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); status = nfs4_wait_for_completion_rpc_task(task); if (status != 0) { data->cancelled = 1; smp_wmb(); } else status = data->rpc_status; rpc_put_task(task); return status; } static void nfs4_open_prepare(struct rpc_task *task, void *calldata) { struct nfs4_opendata *data = calldata; struct nfs4_state_owner *sp = data->owner; if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) return; /* * Check if we still need to send an OPEN call, or if we can use * a delegation instead. */ if (data->state != NULL) { struct nfs_delegation *delegation; if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) goto out_no_action; rcu_read_lock(); delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { rcu_read_unlock(); goto out_no_action; } rcu_read_unlock(); } /* Update sequence id. */ data->o_arg.id = sp->so_owner_id.id; data->o_arg.clientid = sp->so_client->cl_clientid; if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); } data->timestamp = jiffies; rpc_call_start(task); return; out_no_action: task->tk_action = NULL; } static void nfs4_open_done(struct rpc_task *task, void *calldata) { struct nfs4_opendata *data = calldata; data->rpc_status = task->tk_status; if (RPC_ASSASSINATED(task)) return; if (task->tk_status == 0) { switch (data->o_res.f_attr->mode & S_IFMT) { case S_IFREG: break; case S_IFLNK: data->rpc_status = -ELOOP; break; case S_IFDIR: data->rpc_status = -EISDIR; break; default: data->rpc_status = -ENOTDIR; } renew_lease(data->o_res.server, data->timestamp); if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) nfs_confirm_seqid(&data->owner->so_seqid, 0); } data->rpc_done = 1; } static void nfs4_open_release(void *calldata) { struct nfs4_opendata *data = calldata; struct nfs4_state *state = NULL; /* If this request hasn't been cancelled, do nothing */ if (data->cancelled == 0) goto out_free; /* In case of error, no cleanup! */ if (data->rpc_status != 0 || !data->rpc_done) goto out_free; /* In case we need an open_confirm, no cleanup! */ if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) goto out_free; state = nfs4_opendata_to_nfs4_state(data); if (!IS_ERR(state)) nfs4_close_state(&data->path, state, data->o_arg.fmode); out_free: nfs4_opendata_put(data); } static const struct rpc_call_ops nfs4_open_ops = { .rpc_call_prepare = nfs4_open_prepare, .rpc_call_done = nfs4_open_done, .rpc_release = nfs4_open_release, }; /* * Note: On error, nfs4_proc_open will free the struct nfs4_opendata */ static int _nfs4_proc_open(struct nfs4_opendata *data) { struct inode *dir = data->dir->d_inode; struct nfs_server *server = NFS_SERVER(dir); struct nfs_openargs *o_arg = &data->o_arg; struct nfs_openres *o_res = &data->o_res; struct rpc_task *task; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], .rpc_argp = o_arg, .rpc_resp = o_res, .rpc_cred = data->owner->so_cred, }; struct rpc_task_setup task_setup_data = { .rpc_client = server->client, .rpc_message = &msg, .callback_ops = &nfs4_open_ops, .callback_data = data, .workqueue = nfsiod_workqueue, .flags = RPC_TASK_ASYNC, }; int status; kref_get(&data->kref); data->rpc_done = 0; data->rpc_status = 0; data->cancelled = 0; task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); status = nfs4_wait_for_completion_rpc_task(task); if (status != 0) { data->cancelled = 1; smp_wmb(); } else status = data->rpc_status; rpc_put_task(task); if (status != 0 || !data->rpc_done) return status; if (o_res->fh.size == 0) _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr); 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(data); if (status != 0) return status; } if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); return 0; } static int nfs4_recover_expired_lease(struct nfs_server *server) { struct nfs_client *clp = server->nfs_client; int ret; for (;;) { ret = nfs4_wait_clnt_recover(clp); if (ret != 0) return ret; if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) break; nfs4_schedule_state_recovery(clp); } return 0; } /* * OPEN_EXPIRED: * reclaim state on the server after a network partition. * Assumes caller holds the appropriate lock */ static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) { struct nfs4_opendata *opendata; int ret; opendata = nfs4_open_recoverdata_alloc(ctx, state); if (IS_ERR(opendata)) return PTR_ERR(opendata); ret = nfs4_open_recover(opendata, state); if (ret == -ESTALE) d_drop(ctx->path.dentry); nfs4_opendata_put(opendata); return ret; } static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) { struct nfs_server *server = NFS_SERVER(state->inode); struct nfs4_exception exception = { }; int err; do { err = _nfs4_open_expired(ctx, state); if (err != -NFS4ERR_DELAY) break; 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_open_context *ctx; int ret; ctx = nfs4_state_find_open_context(state); if (IS_ERR(ctx)) return PTR_ERR(ctx); ret = nfs4_do_open_expired(ctx, state); put_nfs_open_context(ctx); return ret; } /* * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* * fields corresponding to attributes that were used to store the verifier. * Make sure we clobber those fields in the later setattr call */ static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) { if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && !(sattr->ia_valid & ATTR_ATIME_SET)) sattr->ia_valid |= ATTR_ATIME; if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && !(sattr->ia_valid & ATTR_MTIME_SET)) sattr->ia_valid |= ATTR_MTIME; } /* * Returns a referenced nfs4_state */ static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, 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_opendata *opendata; int status; /* Protect against reboot recovery conflicts */ status = -ENOMEM; if (!(sp = nfs4_get_state_owner(server, cred))) { dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); goto out_err; } status = nfs4_recover_expired_lease(server); if (status != 0) goto err_put_state_owner; if (path->dentry->d_inode != NULL) nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); status = -ENOMEM; opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); if (opendata == NULL) goto err_put_state_owner; if (path->dentry->d_inode != NULL) opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); status = _nfs4_proc_open(opendata); if (status != 0) goto err_opendata_put; if (opendata->o_arg.open_flags & O_EXCL) nfs4_exclusive_attrset(opendata, sattr); state = nfs4_opendata_to_nfs4_state(opendata); status = PTR_ERR(state); if (IS_ERR(state)) goto err_opendata_put; nfs4_opendata_put(opendata); nfs4_put_state_owner(sp); *res = state; return 0; err_opendata_put: nfs4_opendata_put(opendata); err_put_state_owner: nfs4_put_state_owner(sp); out_err: *res = NULL; return status; } static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, 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, path, fmode, 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 %s " " returned a bad sequence-id error!\n", NFS_SERVER(dir)->nfs_client->cl_hostname); exception.retry = 1; continue; } /* * BAD_STATEID on OPEN means that the server cancelled our * state before it received the OPEN_CONFIRM. * Recover by retrying the request as per the discussion * on Page 181 of RFC3530. */ if (status == -NFS4ERR_BAD_STATEID) { exception.retry = 1; continue; } if (status == -EAGAIN) { /* We must have found a delegation */ exception.retry = 1; continue; } res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), status, &exception)); } while (exception.retry); return res; } static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, struct nfs_fattr *fattr, struct iattr *sattr, struct nfs4_state *state) { struct nfs_server *server = NFS_SERVER(inode); struct nfs_setattrargs arg = { .fh = NFS_FH(inode), .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, .rpc_cred = cred, }; unsigned long timestamp = jiffies; int status; nfs_fattr_init(fattr); if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { /* Use that stateid */ } else if (state != NULL) { 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); if (status == 0 && state != NULL) renew_lease(server, timestamp); return status; } static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, struct nfs_fattr *fattr, struct iattr *sattr, struct nfs4_state *state) { struct nfs_server *server = NFS_SERVER(inode); struct nfs4_exception exception = { }; int err; do { err = nfs4_handle_exception(server, _nfs4_do_setattr(inode, cred, fattr, sattr, state), &exception); } while (exception.retry); return err; } struct nfs4_closedata { struct path path; struct inode *inode; struct nfs4_state *state; struct nfs_closeargs arg; struct nfs_closeres res; struct nfs_fattr fattr; unsigned long timestamp; }; 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); path_put(&calldata->path); 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); if (RPC_ASSASSINATED(task)) return; /* hmm. we are done with the inode, and in the process of freeing * the state_owner. we keep this around to process errors */ switch (task->tk_status) { case 0: nfs_set_open_stateid(state, &calldata->res.stateid, 0); renew_lease(server, calldata->timestamp); break; case -NFS4ERR_STALE_STATEID: case -NFS4ERR_OLD_STATEID: case -NFS4ERR_BAD_STATEID: case -NFS4ERR_EXPIRED: if (calldata->arg.fmode == 0) break; default: if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { rpc_restart_call(task); return; } } nfs_refresh_inode(calldata->inode, calldata->res.fattr); } static void nfs4_close_prepare(struct rpc_task *task, void *data) { struct nfs4_closedata *calldata = data; struct nfs4_state *state = calldata->state; int clear_rd, clear_wr, clear_rdwr; if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) return; clear_rd = clear_wr = clear_rdwr = 0; spin_lock(&state->owner->so_lock); /* Calculate the change in open mode */ if (state->n_rdwr == 0) { if (state->n_rdonly == 0) { clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags); clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); } if (state->n_wronly == 0) { clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags); clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); } } spin_unlock(&state->owner->so_lock); if (!clear_rd && !clear_wr && !clear_rdwr) { /* Note: exit _without_ calling nfs4_close_done */ task->tk_action = NULL; return; } nfs_fattr_init(calldata->res.fattr); if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) { task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; calldata->arg.fmode = FMODE_READ; } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) { task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; calldata->arg.fmode = FMODE_WRITE; } calldata->timestamp = jiffies; rpc_call_start(task); } static const struct rpc_call_ops nfs4_close_ops = { .rpc_call_prepare = nfs4_close_prepare, .rpc_call_done = nfs4_close_done, .rpc_release = nfs4_free_closedata, }; /* * 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 path *path, struct nfs4_state *state, int wait) { struct nfs_server *server = NFS_SERVER(state->inode); struct nfs4_closedata *calldata; struct nfs4_state_owner *sp = state->owner; struct rpc_task *task; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], .rpc_cred = state->owner->so_cred, }; struct rpc_task_setup task_setup_data = { .rpc_client = server->client, .rpc_message = &msg, .callback_ops = &nfs4_close_ops, .workqueue = nfsiod_workqueue, .flags = RPC_TASK_ASYNC, }; int status = -ENOMEM; calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); if (calldata == NULL) goto out; calldata->inode = state->inode; calldata->state = state; calldata->arg.fh = NFS_FH(state->inode); calldata->arg.stateid = &state->open_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.fmode = 0; calldata->arg.bitmask = server->cache_consistency_bitmask; calldata->res.fattr = &calldata->fattr; calldata->res.seqid = calldata->arg.seqid; calldata->res.server = server; calldata->path.mnt = mntget(path->mnt); calldata->path.dentry = dget(path->dentry); msg.rpc_argp = &calldata->arg, msg.rpc_resp = &calldata->res, task_setup_data.callback_data = calldata; task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); status = 0; if (wait) status = rpc_wait_for_completion_task(task); rpc_put_task(task); return status; out_free_calldata: kfree(calldata); out: nfs4_put_open_state(state); nfs4_put_state_owner(sp); return status; } static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) { struct file *filp; int ret; /* If the open_intent is for execute, we have an extra check to make */ if (fmode & FMODE_EXEC) { ret = nfs_may_open(state->inode, state->owner->so_cred, nd->intent.open.flags); if (ret < 0) goto out_close; } filp = lookup_instantiate_filp(nd, path->dentry, NULL); if (!IS_ERR(filp)) { struct nfs_open_context *ctx; ctx = nfs_file_open_context(filp); ctx->state = state; return 0; } ret = PTR_ERR(filp); out_close: nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); return ret; } struct dentry * nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) { struct path path = { .mnt = nd->path.mnt, .dentry = dentry, }; struct dentry *parent; struct iattr attr; struct rpc_cred *cred; struct nfs4_state *state; struct dentry *res; fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); 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_umask(); } else { attr.ia_valid = 0; BUG_ON(nd->intent.open.flags & O_CREAT); } cred = rpc_lookup_cred(); if (IS_ERR(cred)) return (struct dentry *)cred; parent = dentry->d_parent; /* Protect against concurrent sillydeletes */ nfs_block_sillyrename(parent); state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); put_rpccred(cred); if (IS_ERR(state)) { if (PTR_ERR(state) == -ENOENT) { d_add(dentry, NULL); nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); } nfs_unblock_sillyrename(parent); return (struct dentry *)state; } res = d_add_unique(dentry, igrab(state->inode)); if (res != NULL) path.dentry = res; nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); nfs_unblock_sillyrename(parent); nfs4_intent_set_file(nd, &path, state, fmode); return res; } int nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) { struct path path = { .mnt = nd->path.mnt, .dentry = dentry, }; struct rpc_cred *cred; struct nfs4_state *state; fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); cred = rpc_lookup_cred(); if (IS_ERR(cred)) return PTR_ERR(cred); state = nfs4_do_open(dir, &path, fmode, 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; default: goto out_drop; } } if (state->inode == dentry->d_inode) { nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); nfs4_intent_set_file(nd, &path, state, fmode); return 1; } nfs4_close_sync(&path, state, fmode); out_drop: d_drop(dentry); return 0; } void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) { if (ctx->state == NULL) return; if (is_sync) nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); else nfs4_close_state(&ctx->path, ctx->state, ctx->mode); } 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; memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; server->acl_bitmask = res.acl_bitmask; } return status; } int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) { struct nfs4_exception exception = { }; int err; do { err = nfs4_handle_exception(server, _nfs4_server_capabilities(server, fhandle), &exception); } while (exception.retry); return err; } static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { 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; } /* * get the file handle for the "/" directory on the server */ static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { int status; status = nfs4_lookup_root(server, fhandle, info); if (status == 0) status = nfs4_server_capabilities(server, fhandle); if (status == 0) status = nfs4_do_fsinfo(server, fhandle, info); return nfs4_map_errors(status); } /* * Get locations and (maybe) other attributes of a referral. * Note that we'll actually follow the referral later when * we detect fsid mismatch in inode revalidation */ static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) { int status = -ENOMEM; struct page *page = NULL; struct nfs4_fs_locations *locations = NULL; page = alloc_page(GFP_KERNEL); if (page == NULL) goto out; locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); if (locations == NULL) goto out; status = nfs4_proc_fs_locations(dir, name, locations, page); if (status != 0) goto out; /* Make sure server returned a different fsid for the referral */ if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); status = -EIO; goto out; } memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; if (!fattr->mode) fattr->mode = S_IFDIR; memset(fhandle, 0, sizeof(struct nfs_fh)); out: if (page) __free_page(page); if (locations) kfree(locations); 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 inode *inode = dentry->d_inode; struct rpc_cred *cred = NULL; struct nfs4_state *state = NULL; int status; nfs_fattr_init(fattr); /* Search for an existing open(O_WRITE) file */ if (sattr->ia_valid & ATTR_FILE) { struct nfs_open_context *ctx; ctx = nfs_file_open_context(sattr->ia_file); if (ctx) { cred = ctx->cred; state = ctx->state; } } status = nfs4_do_setattr(inode, cred, fattr, sattr, state); if (status == 0) nfs_setattr_update_inode(inode, sattr); return status; } static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { int status; struct nfs4_lookup_arg args = { .bitmask = server->attr_bitmask, .dir_fh = dirfh, .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 lookupfh %s\n", name->name); status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply lookupfh: %d\n", status); return status; } static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { struct nfs4_exception exception = { }; int err; do { err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); /* FIXME: !!!! */ if (err == -NFS4ERR_MOVED) { err = -EREMOTE; break; } err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); return err; } static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { int status; dprintk("NFS call lookup %s\n", name->name); status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); if (status == -NFS4ERR_MOVED) status = nfs4_get_referral(dir, name, fattr, fhandle); 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 nfs_server *server = NFS_SERVER(inode); struct nfs_fattr fattr; struct nfs4_accessargs args = { .fh = NFS_FH(inode), .bitmask = server->attr_bitmask, }; struct nfs4_accessres res = { .server = server, .fattr = &fattr, }; 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; } nfs_fattr_init(&fattr); 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; nfs_refresh_inode(inode, &fattr); } return status; } static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) { struct nfs4_exception exception = { }; int err; do { err = nfs4_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; } /* * 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 path path = { .mnt = nd->path.mnt, .dentry = dentry, }; struct nfs4_state *state; struct rpc_cred *cred; fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); int status = 0; cred = rpc_lookup_cred(); if (IS_ERR(cred)) { status = PTR_ERR(cred); goto out; } state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); d_drop(dentry); if (IS_ERR(state)) { status = PTR_ERR(state); goto out_putcred; } d_add(dentry, igrab(state->inode)); nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); if (flags & O_EXCL) { struct nfs_fattr fattr; status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); if (status == 0) nfs_setattr_update_inode(state->inode, sattr); nfs_post_op_update_inode(state->inode, &fattr); } if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) status = nfs4_intent_set_file(nd, &path, state, fmode); else nfs4_close_sync(&path, state, fmode); out_putcred: put_rpccred(cred); out: return status; } static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) { struct nfs_server *server = NFS_SERVER(dir); struct nfs_removeargs args = { .fh = NFS_FH(dir), .name.len = name->len, .name.name = name->name, .bitmask = server->attr_bitmask, }; struct nfs_removeres res = { .server = server, }; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], .rpc_argp = &args, .rpc_resp = &res, }; int status; 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; } static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) { struct nfs_server *server = NFS_SERVER(dir); struct nfs_removeargs *args = msg->rpc_argp; struct nfs_removeres *res = msg->rpc_resp; args->bitmask = server->cache_consistency_bitmask; res->server = server; msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; } static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) { struct nfs_removeres *res = task->tk_msg.rpc_resp; if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) return 0; update_changeattr(dir, &res->cinfo); nfs_post_op_update_inode(dir, &res->dir_attr); return 1; } 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_post_op_update_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; } struct nfs4_createdata { struct rpc_message msg; struct nfs4_create_arg arg; struct nfs4_create_res res; struct nfs_fh fh; struct nfs_fattr fattr; struct nfs_fattr dir_fattr; }; static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, struct qstr *name, struct iattr *sattr, u32 ftype) { struct nfs4_createdata *data; data = kzalloc(sizeof(*data), GFP_KERNEL); if (data != NULL) { struct nfs_server *server = NFS_SERVER(dir); data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; data->msg.rpc_argp = &data->arg; data->msg.rpc_resp = &data->res; data->arg.dir_fh = NFS_FH(dir); data->arg.server = server; data->arg.name = name; data->arg.attrs = sattr; data->arg.ftype = ftype; data->arg.bitmask = server->attr_bitmask; data->res.server = server; data->res.fh = &data->fh; data->res.fattr = &data->fattr; data->res.dir_fattr = &data->dir_fattr; nfs_fattr_init(data->res.fattr); nfs_fattr_init(data->res.dir_fattr); } return data; } static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) { int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0); if (status == 0) { update_changeattr(dir, &data->res.dir_cinfo); nfs_post_op_update_inode(dir, data->res.dir_fattr); status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); } return status; } static void nfs4_free_createdata(struct nfs4_createdata *data) { kfree(data);


context:
space:
mode: