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| author | Eric Van Hensbergen <ericvh@gmail.com> | 2009-11-02 08:39:28 -0600 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2009-11-02 08:43:45 -0600 |
| commit | 3e2796a90cf349527e50b3bc4d0b2f4019b1ce7a (patch) | |
| tree | 80bddc0f5d36a589db5a77b9b60e4c94c75994ed /net/9p | |
| parent | 2511cd0b3b9e9b1c3e9360cc565c3745ac3f3f3f (diff) | |
| download | linux-stable-3e2796a90cf349527e50b3bc4d0b2f4019b1ce7a.tar.gz linux-stable-3e2796a90cf349527e50b3bc4d0b2f4019b1ce7a.tar.bz2 linux-stable-3e2796a90cf349527e50b3bc4d0b2f4019b1ce7a.zip | |
9p: fix readdir corner cases
The patch below also addresses a couple of other corner cases in readdir
seen with a large (e.g. 64k) msize. I'm not sure what people think of
my co-opting of fid->aux here. I'd be happy to rework if there's a better
way.
When the size of the user supplied buffer passed to readdir is smaller
than the data returned in one go by the 9P read request, v9fs_dir_readdir()
currently discards extra data so that, on the next call, a 9P read
request will be issued with offset < previous offset + bytes returned,
which voilates the constraint described in paragraph 3 of read(5) description.
This patch preseves the leftover data in fid->aux for use in the next call.
Signed-off-by: Jim Garlick <garlick@llnl.gov>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'net/9p')
| -rw-r--r-- | net/9p/client.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/net/9p/client.c b/net/9p/client.c index 5bf5f227dbe0..8af95b2dddd6 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -582,11 +582,9 @@ static struct p9_fid *p9_fid_create(struct p9_client *clnt) memset(&fid->qid, 0, sizeof(struct p9_qid)); fid->mode = -1; - fid->rdir_fpos = 0; fid->uid = current_fsuid(); fid->clnt = clnt; - fid->aux = NULL; - + fid->rdir = NULL; spin_lock_irqsave(&clnt->lock, flags); list_add(&fid->flist, &clnt->fidlist); spin_unlock_irqrestore(&clnt->lock, flags); @@ -609,6 +607,7 @@ static void p9_fid_destroy(struct p9_fid *fid) spin_lock_irqsave(&clnt->lock, flags); list_del(&fid->flist); spin_unlock_irqrestore(&clnt->lock, flags); + kfree(fid->rdir); kfree(fid); } |