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locks: move flock locks to file_lock_context

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Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Acked-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Jeff Layton
2015-01-16 15:05:55 -05:00
committed by Jeff Layton
parent c362781cad
commit 5263e31e45
6 changed files with 152 additions and 35 deletions
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19
fs/nfs/delegation.c
View File

@@ -85,15 +85,16 @@ static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_
{
struct inode *inode = state->inode;
struct file_lock *fl;
struct file_lock_context *flctx;
int status = 0;
if (inode->i_flock == NULL)
if (inode->i_flock == NULL && inode->i_flctx == NULL)
goto out;
/* Protect inode->i_flock using the i_lock */
spin_lock(&inode->i_lock);
for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
if (!(fl->fl_flags & (FL_POSIX)))
continue;
if (nfs_file_open_context(fl->fl_file) != ctx)
continue;
@@ -103,6 +104,20 @@ static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_
goto out;
spin_lock(&inode->i_lock);
}
flctx = inode->i_flctx;
if (flctx) {
list_for_each_entry(fl, &flctx->flc_flock, fl_list) {
if (nfs_file_open_context(fl->fl_file) != ctx)
continue;
spin_unlock(&inode->i_lock);
status = nfs4_lock_delegation_recall(fl, state,
stateid);
if (status < 0)
goto out;
spin_lock(&inode->i_lock);
}
}
spin_unlock(&inode->i_lock);
out:
return status;

42
fs/nfs/nfs4state.c
View File

@@ -1366,8 +1366,9 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_
struct nfs_inode *nfsi = NFS_I(inode);
struct file_lock *fl;
int status = 0;
struct file_lock_context *flctx = inode->i_flctx;
if (inode->i_flock == NULL)
if (inode->i_flock == NULL && flctx == NULL)
return 0;
/* Guard against delegation returns and new lock/unlock calls */
@@ -1375,7 +1376,7 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_
/* Protect inode->i_flock using the BKL */
spin_lock(&inode->i_lock);
for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
if (!(fl->fl_flags & FL_POSIX))
continue;
if (nfs_file_open_context(fl->fl_file)->state != state)
continue;
@@ -1408,6 +1409,43 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_
}
spin_lock(&inode->i_lock);
}
if (!flctx)
goto out_unlock;
list_for_each_entry(fl, &flctx->flc_flock, fl_list) {
if (nfs_file_open_context(fl->fl_file)->state != state)
continue;
spin_unlock(&inode->i_lock);
status = ops->recover_lock(state, fl);
switch (status) {
case 0:
break;
case -ESTALE:
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_EXPIRED:
case -NFS4ERR_NO_GRACE:
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_BADSESSION:
case -NFS4ERR_BADSLOT:
case -NFS4ERR_BAD_HIGH_SLOT:
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
goto out;
default:
pr_err("NFS: %s: unhandled error %d\n",
__func__, status);
case -ENOMEM:
case -NFS4ERR_DENIED:
case -NFS4ERR_RECLAIM_BAD:
case -NFS4ERR_RECLAIM_CONFLICT:
/* kill_proc(fl->fl_pid, SIGLOST, 1); */
status = 0;
}
spin_lock(&inode->i_lock);
}
out_unlock:
spin_unlock(&inode->i_lock);
out:
up_write(&nfsi->rwsem);

6
fs/nfs/pagelist.c
View File

@@ -826,6 +826,7 @@ static bool nfs_can_coalesce_requests(struct nfs_page *prev,
struct nfs_pageio_descriptor *pgio)
{
size_t size;
struct file_lock_context *flctx;
if (prev) {
if (!nfs_match_open_context(req->wb_context, prev->wb_context))
@@ -834,6 +835,11 @@ static bool nfs_can_coalesce_requests(struct nfs_page *prev,
!nfs_match_lock_context(req->wb_lock_context,
prev->wb_lock_context))
return false;
flctx = req->wb_context->dentry->d_inode->i_flctx;
if (flctx != NULL && !list_empty_careful(&flctx->flc_flock) &&
!nfs_match_lock_context(req->wb_lock_context,
prev->wb_lock_context))
return false;
if (req_offset(req) != req_offset(prev) + prev->wb_bytes)
return false;
if (req->wb_page == prev->wb_page) {

43
fs/nfs/write.c
View File

@@ -1113,6 +1113,11 @@ int nfs_flush_incompatible(struct file *file, struct page *page)
do_flush |= l_ctx->lockowner.l_owner != current->files
|| l_ctx->lockowner.l_pid != current->tgid;
}
if (l_ctx && ctx->dentry->d_inode->i_flctx &&
!list_empty_careful(&ctx->dentry->d_inode->i_flctx->flc_flock)) {
do_flush |= l_ctx->lockowner.l_owner != current->files
|| l_ctx->lockowner.l_pid != current->tgid;
}
nfs_release_request(req);
if (!do_flush)
return 0;
@@ -1170,6 +1175,13 @@ out:
return PageUptodate(page) != 0;
}
static bool
is_whole_file_wrlock(struct file_lock *fl)
{
return fl->fl_start == 0 && fl->fl_end == OFFSET_MAX &&
fl->fl_type == F_WRLCK;
}
/* If we know the page is up to date, and we're not using byte range locks (or
* if we have the whole file locked for writing), it may be more efficient to
* extend the write to cover the entire page in order to avoid fragmentation
@@ -1180,17 +1192,38 @@ out:
*/
static int nfs_can_extend_write(struct file *file, struct page *page, struct inode *inode)
{
int ret;
struct file_lock_context *flctx = inode->i_flctx;
struct file_lock *fl;
if (file->f_flags & O_DSYNC)
return 0;
if (!nfs_write_pageuptodate(page, inode))
return 0;
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE))
return 1;
if (inode->i_flock == NULL || (inode->i_flock->fl_start == 0 &&
inode->i_flock->fl_end == OFFSET_MAX &&
inode->i_flock->fl_type != F_RDLCK))
return 1;
return 0;
if (!inode->i_flock && !flctx)
return 0;
/* Check to see if there are whole file write locks */
spin_lock(&inode->i_lock);
ret = 0;
fl = inode->i_flock;
if (fl && is_whole_file_wrlock(fl)) {
ret = 1;
goto out;
}
if (!list_empty(&flctx->flc_flock)) {
fl = list_first_entry(&flctx->flc_flock, struct file_lock,
fl_list);
if (fl->fl_type == F_WRLCK)
ret = 1;
}
out:
spin_unlock(&inode->i_lock);
return ret;
}
/*