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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-09-20 17:31:43 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-09-28 16:03:14 -0400
commit9c6263819f25254f2ed48f076b50096dd5893dfb (patch)
treed95527cbeba0d44973f286602a35ff2c21c811bd /fs/nfs/pnfs.c
parent6622c3ea059b2fed49924b74db41d1e0f065fbd3 (diff)
downloadop-kernel-dev-9c6263819f25254f2ed48f076b50096dd5893dfb.zip
op-kernel-dev-9c6263819f25254f2ed48f076b50096dd5893dfb.tar.gz
NFSv4.1: Clean up the removal of pnfs_layout_hdr from the server list
Move the code into pnfs_free_layout_hdr(), and add checks to get_layout_by_fh_locked to ensure that they don't reference a layout that is being freed. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/pnfs.c')
-rw-r--r--fs/nfs/pnfs.c29
1 files changed, 10 insertions, 19 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 0866314..11cc0ad 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -207,7 +207,16 @@ pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags)
static void
pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo)
{
- struct pnfs_layoutdriver_type *ld = NFS_SERVER(lo->plh_inode)->pnfs_curr_ld;
+ struct nfs_server *server = NFS_SERVER(lo->plh_inode);
+ struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld;
+
+ if (!list_empty(&lo->plh_layouts)) {
+ struct nfs_client *clp = server->nfs_client;
+
+ spin_lock(&clp->cl_lock);
+ list_del_init(&lo->plh_layouts);
+ spin_unlock(&clp->cl_lock);
+ }
put_rpccred(lo->plh_lc_cred);
return ld->alloc_layout_hdr ? ld->free_layout_hdr(lo) : kfree(lo);
}
@@ -217,7 +226,6 @@ pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo)
{
struct nfs_inode *nfsi = NFS_I(lo->plh_inode);
dprintk("%s: freeing layout cache %p\n", __func__, lo);
- BUG_ON(!list_empty(&lo->plh_layouts));
nfsi->layout = NULL;
/* Reset MDS Threshold I/O counters */
nfsi->write_io = 0;
@@ -480,22 +488,10 @@ void
pnfs_free_lseg_list(struct list_head *free_me)
{
struct pnfs_layout_segment *lseg, *tmp;
- struct pnfs_layout_hdr *lo;
if (list_empty(free_me))
return;
- lo = list_first_entry(free_me, struct pnfs_layout_segment,
- pls_list)->pls_layout;
-
- if (test_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags)) {
- struct nfs_client *clp;
-
- clp = NFS_SERVER(lo->plh_inode)->nfs_client;
- spin_lock(&clp->cl_lock);
- list_del_init(&lo->plh_layouts);
- spin_unlock(&clp->cl_lock);
- }
list_for_each_entry_safe(lseg, tmp, free_me, pls_list) {
list_del(&lseg->pls_list);
free_lseg(lseg);
@@ -1148,11 +1144,6 @@ pnfs_update_layout(struct inode *ino,
arg.length = PAGE_CACHE_ALIGN(arg.length);
lseg = send_layoutget(lo, ctx, &arg, gfp_flags);
- if (!lseg && first) {
- spin_lock(&clp->cl_lock);
- list_del_init(&lo->plh_layouts);
- spin_unlock(&clp->cl_lock);
- }
atomic_dec(&lo->plh_outstanding);
out_put_layout_hdr:
pnfs_put_layout_hdr(lo);
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