summaryrefslogtreecommitdiffstats
path: root/fs/notify
diff options
context:
space:
mode:
authorAmir Goldstein <amir73il@gmail.com>2020-07-16 11:42:11 +0300
committerJan Kara <jack@suse.cz>2020-07-27 21:23:36 +0200
commit6ad1aadd970460d81d5e803ac38c0f63f85c0a00 (patch)
treedb16832321f2745bfd9e0c90c9e723a33e407ae2 /fs/notify
parent103ff6a554923e0da54e0a28a686c91facf5bffd (diff)
downloadlinux-6ad1aadd970460d81d5e803ac38c0f63f85c0a00.tar.bz2
fanotify: distinguish between fid encode error and null fid
In fanotify_encode_fh(), both cases of NULL inode and failure to encode ended up with fh type FILEID_INVALID. Distiguish the case of NULL inode, by setting fh type to FILEID_ROOT. This is just a semantic difference at this point. Remove stale comment and unneeded check from fid event compare helpers. Link: https://lore.kernel.org/r/20200716084230.30611-4-amir73il@gmail.com Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify')
-rw-r--r--fs/notify/fanotify/fanotify.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index 84c86a45874c..3dc71a8e795a 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -34,10 +34,6 @@ static bool fanotify_fh_equal(struct fanotify_fh *fh1,
if (fh1->type != fh2->type || fh1->len != fh2->len)
return false;
- /* Do not merge events if we failed to encode fh */
- if (fh1->type == FILEID_INVALID)
- return false;
-
return !fh1->len ||
!memcmp(fanotify_fh_buf(fh1), fanotify_fh_buf(fh2), fh1->len);
}
@@ -56,10 +52,7 @@ static bool fanotify_fid_event_equal(struct fanotify_fid_event *ffe1,
static bool fanotify_name_event_equal(struct fanotify_name_event *fne1,
struct fanotify_name_event *fne2)
{
- /*
- * Do not merge name events without dir fh.
- * FAN_DIR_MODIFY does not encode object fh, so it may be empty.
- */
+ /* Do not merge name events without dir fh */
if (!fne1->dir_fh.len)
return false;
@@ -290,8 +283,10 @@ static void fanotify_encode_fh(struct fanotify_fh *fh, struct inode *inode,
void *buf = fh->buf;
int err;
+ fh->type = FILEID_ROOT;
+ fh->len = 0;
if (!inode)
- goto out;
+ return;
dwords = 0;
err = -ENOENT;
@@ -326,7 +321,6 @@ out_err:
type, bytes, err);
kfree(ext_buf);
*fanotify_fh_ext_buf_ptr(fh) = NULL;
-out:
/* Report the event without a file identifier on encode error */
fh->type = FILEID_INVALID;
fh->len = 0;