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| author | Steven Whitehouse <swhiteho@redhat.com> | 2011-08-23 13:19:25 +0400 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2011-10-21 15:39:29 +0400 |
| commit | 9453615a1a7ef3fa910c6464a619595556cfcd63 (patch) | |
| tree | 40242c84367376197420ce12e50ae29e720dc5e3 /fs/gfs2/file.c | |
| parent | 9a63edd12ba3c18351f00d6b77a6b2f49f2b8eb6 (diff) | |
| download | linux-9453615a1a7ef3fa910c6464a619595556cfcd63.tar.xz | |
GFS2: Fix lseek after SEEK_DATA, SEEK_HOLE have been added
We need to take the inode's glock whenever the inode's size
is referenced, otherwise it might not be uptodate. Even
though generic_file_llseek_unlocked() doesn't implement
SEEK_DATA, SEEK_HOLE directly, it does reference the inode's
size in those cases, so we need to add them to the list
of origins which need the glock.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'fs/gfs2/file.c')
| -rw-r--r-- | fs/gfs2/file.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 4416a1cfa1fe..d717b72500a4 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -59,15 +59,24 @@ static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin) struct gfs2_holder i_gh; loff_t error; - if (origin == 2) { + switch (origin) { + case SEEK_END: /* These reference inode->i_size */ + case SEEK_DATA: + case SEEK_HOLE: error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); if (!error) { error = generic_file_llseek_unlocked(file, offset, origin); gfs2_glock_dq_uninit(&i_gh); } - } else + break; + case SEEK_CUR: + case SEEK_SET: error = generic_file_llseek_unlocked(file, offset, origin); + break; + default: + error = -EINVAL; + } return error; } |