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locks: convert posix 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 5263e31e45
commit bd61e0a9c8
11 changed files with 158 additions and 201 deletions
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30
fs/nfs/write.c
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@@ -1091,6 +1091,7 @@ int nfs_flush_incompatible(struct file *file, struct page *page)
{
struct nfs_open_context *ctx = nfs_file_open_context(file);
struct nfs_lock_context *l_ctx;
struct file_lock_context *flctx = file_inode(file)->i_flctx;
struct nfs_page *req;
int do_flush, status;
/*
@@ -1109,12 +1110,9 @@ int nfs_flush_incompatible(struct file *file, struct page *page)
do_flush = req->wb_page != page || req->wb_context != ctx;
/* for now, flush if more than 1 request in page_group */
do_flush |= req->wb_this_page != req;
if (l_ctx && ctx->dentry->d_inode->i_flock != NULL) {
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)) {
if (l_ctx && flctx &&
!(list_empty_careful(&flctx->flc_posix) &&
list_empty_careful(&flctx->flc_flock))) {
do_flush |= l_ctx->lockowner.l_owner != current->files
|| l_ctx->lockowner.l_pid != current->tgid;
}
@@ -1202,26 +1200,24 @@ static int nfs_can_extend_write(struct file *file, struct page *page, struct ino
return 0;
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE))
return 1;
if (!inode->i_flock && !flctx)
if (!flctx || (list_empty_careful(&flctx->flc_flock) &&
list_empty_careful(&flctx->flc_posix)))
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)) {
spin_lock(&inode->i_lock);
if (!list_empty(&flctx->flc_posix)) {
fl = list_first_entry(&flctx->flc_posix, struct file_lock,
fl_list);
if (is_whole_file_wrlock(fl))
ret = 1;
} else 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;
}