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authorTrond Myklebust <trond.myklebust@primarydata.com>2016-02-23 01:46:34 +0300
committerTrond Myklebust <trond.myklebust@primarydata.com>2016-02-23 01:46:34 +0300
commit9fd4b9fc7695a4da1363a0b439853f88fb6a034f (patch)
tree6b6fb3dc2560522f952c1e35fd0c727973cc593a /fs
parent2454dfea0aef8a883d4302c38124edb373d47a25 (diff)
downloadlinux-9fd4b9fc7695a4da1363a0b439853f88fb6a034f.tar.xz
NFSv4.x/pnfs: Fix a race between layoutget and bulk recalls
Replace another case where the layout 'plh_block_lgets' can trigger infinite loops in send_layoutget(). Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/pnfs.c17
1 files changed, 6 insertions, 11 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 8a41538f1155..2fa483e6dbe2 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -259,7 +259,7 @@ pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo)
* is required.
* Note that caller must hold inode->i_lock.
*/
-static void
+static int
pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
struct list_head *lseg_list)
{
@@ -270,7 +270,7 @@ pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
};
set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
- pnfs_mark_matching_lsegs_invalid(lo, lseg_list, &range);
+ return pnfs_mark_matching_lsegs_invalid(lo, lseg_list, &range);
}
static int
@@ -637,11 +637,6 @@ pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list,
{
struct pnfs_layout_hdr *lo;
struct inode *inode;
- struct pnfs_layout_range range = {
- .iomode = IOMODE_ANY,
- .offset = 0,
- .length = NFS4_MAX_UINT64,
- };
LIST_HEAD(lseg_list);
int ret = 0;
@@ -656,11 +651,11 @@ pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list,
spin_lock(&inode->i_lock);
list_del_init(&lo->plh_bulk_destroy);
- lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */
- if (is_bulk_recall)
- set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
- if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range))
+ if (pnfs_mark_layout_stateid_invalid(lo, &lseg_list)) {
+ if (is_bulk_recall)
+ set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
ret = -EAGAIN;
+ }
spin_unlock(&inode->i_lock);
pnfs_free_lseg_list(&lseg_list);
/* Free all lsegs that are attached to commit buckets */