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Diffstat (limited to 'fs/nfs/nfs4proc.c')
-rw-r--r--fs/nfs/nfs4proc.c120
1 files changed, 76 insertions, 44 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 933e13b383f..21482b2518f 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -214,16 +214,15 @@ static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid,
struct inode *inode = state->inode;
open_flags &= (FMODE_READ|FMODE_WRITE);
- /* Protect against nfs4_find_state() */
+ /* Protect against nfs4_find_state_byowner() */
spin_lock(&state->owner->so_lock);
spin_lock(&inode->i_lock);
- state->state |= open_flags;
- /* NB! List reordering - see the reclaim code for why. */
- if ((open_flags & FMODE_WRITE) && 0 == state->nwriters++)
- list_move(&state->open_states, &state->owner->so_states);
+ memcpy(&state->stateid, stateid, sizeof(state->stateid));
+ if ((open_flags & FMODE_WRITE))
+ state->nwriters++;
if (open_flags & FMODE_READ)
state->nreaders++;
- memcpy(&state->stateid, stateid, sizeof(state->stateid));
+ nfs4_state_set_mode_locked(state, state->state | open_flags);
spin_unlock(&inode->i_lock);
spin_unlock(&state->owner->so_lock);
}
@@ -896,7 +895,6 @@ static void nfs4_close_done(struct rpc_task *task)
break;
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
- state->state = calldata->arg.open_flags;
nfs4_schedule_state_recovery(server->nfs4_state);
break;
default:
@@ -906,7 +904,6 @@ static void nfs4_close_done(struct rpc_task *task)
}
}
nfs_refresh_inode(calldata->inode, calldata->res.fattr);
- state->state = calldata->arg.open_flags;
nfs4_free_closedata(calldata);
}
@@ -920,24 +917,26 @@ static void nfs4_close_begin(struct rpc_task *task)
.rpc_resp = &calldata->res,
.rpc_cred = state->owner->so_cred,
};
- int mode = 0;
+ int mode = 0, old_mode;
int status;
status = nfs_wait_on_sequence(calldata->arg.seqid, task);
if (status != 0)
return;
- /* Don't reorder reads */
- smp_rmb();
/* Recalculate the new open mode in case someone reopened the file
* while we were waiting in line to be scheduled.
*/
- if (state->nreaders != 0)
- mode |= FMODE_READ;
- if (state->nwriters != 0)
- mode |= FMODE_WRITE;
- if (test_bit(NFS_DELEGATED_STATE, &state->flags))
- state->state = mode;
- if (mode == state->state) {
+ spin_lock(&state->owner->so_lock);
+ spin_lock(&calldata->inode->i_lock);
+ mode = old_mode = state->state;
+ if (state->nreaders == 0)
+ mode &= ~FMODE_READ;
+ if (state->nwriters == 0)
+ mode &= ~FMODE_WRITE;
+ nfs4_state_set_mode_locked(state, mode);
+ spin_unlock(&calldata->inode->i_lock);
+ spin_unlock(&state->owner->so_lock);
+ if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
nfs4_free_closedata(calldata);
task->tk_exit = NULL;
rpc_exit(task, 0);
@@ -961,7 +960,7 @@ static void nfs4_close_begin(struct rpc_task *task)
*
* NOTE: Caller must be holding the sp->so_owner semaphore!
*/
-int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode)
+int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
{
struct nfs_server *server = NFS_SERVER(inode);
struct nfs4_closedata *calldata;
@@ -1275,7 +1274,8 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
{
struct rpc_cred *cred;
struct inode *inode = dentry->d_inode;
- struct nfs4_state *state;
+ struct nfs_open_context *ctx;
+ struct nfs4_state *state = NULL;
int status;
nfs_fattr_init(fattr);
@@ -1283,22 +1283,18 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
if (IS_ERR(cred))
return PTR_ERR(cred);
- /* Search for an existing WRITE delegation first */
- state = nfs4_open_delegated(inode, FMODE_WRITE, cred);
- if (!IS_ERR(state)) {
- /* NB: nfs4_open_delegated() bumps the inode->i_count */
- iput(inode);
- } else {
- /* Search for an existing open(O_WRITE) stateid */
- state = nfs4_find_state(inode, cred, FMODE_WRITE);
- }
+
+ /* Search for an existing open(O_WRITE) file */
+ ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
+ if (ctx != NULL)
+ state = ctx->state;
status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
NFS_FH(inode), sattr, state);
if (status == 0)
nfs_setattr_update_inode(inode, sattr);
- if (state != NULL)
- nfs4_close_state(state, FMODE_WRITE);
+ if (ctx != NULL)
+ put_nfs_open_context(ctx);
put_rpccred(cred);
return status;
}
@@ -2599,12 +2595,10 @@ int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct
case -NFS4ERR_GRACE:
case -NFS4ERR_DELAY:
ret = nfs4_delay(server->client, &exception->timeout);
- if (ret == 0)
- exception->retry = 1;
- break;
+ if (ret != 0)
+ break;
case -NFS4ERR_OLD_STATEID:
- if (ret == 0)
- exception->retry = 1;
+ exception->retry = 1;
}
/* We failed to handle the error */
return nfs4_map_errors(ret);
@@ -2924,6 +2918,10 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *
struct nfs4_lock_state *lsp;
int status;
+ /* Is this a delegated lock? */
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags))
+ return do_vfs_lock(request->fl_file, request);
+
status = nfs4_set_lock_state(state, request);
if (status != 0)
return status;
@@ -3038,6 +3036,9 @@ static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request
struct nfs4_exception exception = { };
int err;
+ /* Cache the lock if possible... */
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags))
+ return 0;
do {
err = _nfs4_do_setlk(state, F_SETLK, request, 1);
if (err != -NFS4ERR_DELAY)
@@ -3053,6 +3054,9 @@ static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request
struct nfs4_exception exception = { };
int err;
+ err = nfs4_set_lock_state(state, request);
+ if (err != 0)
+ return err;
do {
err = _nfs4_do_setlk(state, F_SETLK, request, 0);
if (err != -NFS4ERR_DELAY)
@@ -3068,15 +3072,25 @@ static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock
int status;
down_read(&clp->cl_sem);
- status = nfs4_set_lock_state(state, request);
- if (status == 0)
- status = _nfs4_do_setlk(state, cmd, request, 0);
- if (status == 0) {
- /* Note: we always want to sleep here! */
- request->fl_flags |= FL_SLEEP;
- if (do_vfs_lock(request->fl_file, request) < 0)
- printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
+ /* Is this a delegated open? */
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
+ /* Yes: cache locks! */
+ status = do_vfs_lock(request->fl_file, request);
+ /* ...but avoid races with delegation recall... */
+ if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
+ goto out;
}
+ status = nfs4_set_lock_state(state, request);
+ if (status != 0)
+ goto out;
+ status = _nfs4_do_setlk(state, cmd, request, 0);
+ if (status != 0)
+ goto out;
+ /* Note: we always want to sleep here! */
+ request->fl_flags |= FL_SLEEP;
+ if (do_vfs_lock(request->fl_file, request) < 0)
+ printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
+out:
up_read(&clp->cl_sem);
return status;
}
@@ -3130,6 +3144,24 @@ nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
return status;
}
+int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
+{
+ struct nfs_server *server = NFS_SERVER(state->inode);
+ struct nfs4_exception exception = { };
+ int err;
+
+ err = nfs4_set_lock_state(state, fl);
+ if (err != 0)
+ goto out;
+ do {
+ err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
+ if (err != -NFS4ERR_DELAY)
+ break;
+ err = nfs4_handle_exception(server, err, &exception);
+ } while (exception.retry);
+out:
+ return err;
+}
#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-08 01:37:02 +0000