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| author |   David Howells <dhowells@redhat.com> | 2020-04-11 08:50:45 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2020-04-13 15:09:01 +0100 |
| commit | 40fc81027f892284ce31f8b6de1e497f5b47e71f (patch) | |
| tree | 68d3a89099d8fda3866485281ab11163c8c05c7c /fs/afs/dir.c | |
| parent | afs: Fix race between post-modification dir edit and readdir/d_revalidate (diff) | |
| download | linux-dev-40fc81027f892284ce31f8b6de1e497f5b47e71f.tar.xz linux-dev-40fc81027f892284ce31f8b6de1e497f5b47e71f.zip | |
afs: Fix afs_d_validate() to set the right directory version
If a dentry's version is somewhere between invalid_before and the current
directory version, we should be setting it forward to the current version,
not backwards to the invalid_before version. Note that we're only doing
this at all because dentry::d_fsdata isn't large enough on a 32-bit system.
Fix this by using a separate variable for invalid_before so that we don't
accidentally clobber the current dir version.
Fixes: a4ff7401fbfa ("afs: Keep track of invalid-before version for dentry coherency")
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/afs/dir.c')
| -rw-r--r-- | fs/afs/dir.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/afs/dir.c b/fs/afs/dir.c index d6278616fb88..d1e1caa23c8b 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -1032,7 +1032,7 @@ static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) struct dentry *parent; struct inode *inode; struct key *key; - afs_dataversion_t dir_version; + afs_dataversion_t dir_version, invalid_before; long de_version; int ret; @@ -1084,8 +1084,8 @@ static int afs_d_revalidate(struct dentry *dentry, unsigned int flags) if (de_version == (long)dir_version) goto out_valid_noupdate; - dir_version = dir->invalid_before; - if (de_version - (long)dir_version >= 0) + invalid_before = dir->invalid_before; + if (de_version - (long)invalid_before >= 0) goto out_valid; _debug("dir modified"); |