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| author | Martin Brandenburg <martin@omnibond.com> | 2018-05-31 19:36:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-06-26 03:06:33 +0300 |
| commit | f7e4328c37007c43e005af1b3ed268149f8abb32 (patch) | |
| tree | 1d1601d71f8378377b10a65611ba42238a6001d9 | |
| parent | b8511dbff2639db94baad73ab912bd6f22afea14 (diff) | |
| download | linux-f7e4328c37007c43e005af1b3ed268149f8abb32.tar.xz | |
orangefs: set i_size on new symlink
commit f6a4b4c9d07dda90c7c29dae96d6119ac6425dca upstream.
As long as a symlink inode remains in-core, the destination (and
therefore size) will not be re-fetched from the server, as it cannot
change. The original implementation of the attribute cache assumed that
setting the expiry time in the past was sufficient to cause a re-fetch
of all attributes on the next getattr. That does not work in this case.
The bug manifested itself as follows. When the command sequence
touch foo; ln -s foo bar; ls -l bar
is run, the output was
lrwxrwxrwx. 1 fedora fedora 4906 Apr 24 19:10 bar -> foo
However, after a re-mount, ls -l bar produces
lrwxrwxrwx. 1 fedora fedora 3 Apr 24 19:10 bar -> foo
After this commit, even before a re-mount, the output is
lrwxrwxrwx. 1 fedora fedora 3 Apr 24 19:10 bar -> foo
Reported-by: Becky Ligon <ligon@clemson.edu>
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Fixes: 71680c18c8f2 ("orangefs: Cache getattr results.")
Cc: stable@vger.kernel.org
Cc: hubcap@omnibond.com
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/orangefs/namei.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/orangefs/namei.c b/fs/orangefs/namei.c index f8f3c73d2664..05b3abbdbc4b 100644 --- a/fs/orangefs/namei.c +++ b/fs/orangefs/namei.c @@ -314,6 +314,13 @@ static int orangefs_symlink(struct inode *dir, ret = PTR_ERR(inode); goto out; } + /* + * This is necessary because orangefs_inode_getattr will not + * re-read symlink size as it is impossible for it to change. + * Invalidating the cache does not help. orangefs_new_inode + * does not set the correct size (it does not know symname). + */ + inode->i_size = strlen(symname); gossip_debug(GOSSIP_NAME_DEBUG, "Assigned symlink inode new number of %pU\n", |