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authorDavid Howells <dhowells@redhat.com>2020-04-16 14:20:32 +0100
committerDavid Howells <dhowells@redhat.com>2020-05-31 15:19:51 +0100
commit13fcc6356a94558a0a4857dc00cd26b3834a1b3e (patch)
treeb268e5b08ed0aa1171f461bbe8c036bc26f54798 /fs/afs
parent32f71aa497cfb23d37149c2ef16ad71fce2e45e2 (diff)
downloadlinux-13fcc6356a94558a0a4857dc00cd26b3834a1b3e.tar.bz2
afs: Always include dir in bulk status fetch from afs_do_lookup()
When a lookup is done in an AFS directory, the filesystem will speculate and fetch up to 49 other statuses for files in the same directory and fetch those as well, turning them into inodes or updating inodes that already exist. However, occasionally, a callback break might go missing due to NAT timing out, but the afs filesystem doesn't then realise that the directory is not up to date. Alleviate this by using one of the status slots to check the directory in which the lookup is being done. Reported-by: Dave Botsch <botsch@cnf.cornell.edu> Suggested-by: Jeffrey Altman <jaltman@auristor.com> Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/afs')
-rw-r--r--fs/afs/dir.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index d1e1caa23c8b..3c486340b220 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -658,7 +658,8 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry,
cookie->ctx.actor = afs_lookup_filldir;
cookie->name = dentry->d_name;
- cookie->nr_fids = 1; /* slot 0 is saved for the fid we actually want */
+ cookie->nr_fids = 2; /* slot 0 is saved for the fid we actually want
+ * and slot 1 for the directory */
read_seqlock_excl(&dvnode->cb_lock);
dcbi = rcu_dereference_protected(dvnode->cb_interest,
@@ -709,7 +710,11 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry,
if (!cookie->inodes)
goto out_s;
- for (i = 1; i < cookie->nr_fids; i++) {
+ cookie->fids[1] = dvnode->fid;
+ cookie->statuses[1].cb_break = afs_calc_vnode_cb_break(dvnode);
+ cookie->inodes[1] = igrab(&dvnode->vfs_inode);
+
+ for (i = 2; i < cookie->nr_fids; i++) {
scb = &cookie->statuses[i];
/* Find any inodes that already exist and get their