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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-25 15:41:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-25 15:41:56 -0700
commit17763641ff8a189bc6fb1fcd5c2a9844ee0dd89c (patch)
tree097b1d8d1d28abf547a7b7182b20e059f89a3f76 /fs/gfs2
parentcf0346161ccd3642defedeb4850a6c33406e56d6 (diff)
parent10201655b085df8e000822e496e5d4016a167a36 (diff)
Merge tag 'gfs2-for-linus-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull gfs2 fix from Bob Peterson: "GFS2: Fix an old regression in GFS2's debugfs interface This fixes a regression introduced by commit 88ffbf3e037e ("GFS2: Use resizable hash table for glocks"). The regression caused the glock dump in debugfs to not report all the glocks, which makes debugging extremely difficult" * tag 'gfs2-for-linus-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: gfs2: Fix debugfs glocks dump
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/glock.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 98e845b7841b..11066d8647d2 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1945,13 +1945,9 @@ static void *gfs2_glock_seq_start(struct seq_file *seq, loff_t *pos)
{
struct gfs2_glock_iter *gi = seq->private;
loff_t n = *pos;
- int ret;
-
- if (gi->last_pos <= *pos)
- n = (*pos - gi->last_pos);
- ret = rhashtable_walk_start(&gi->hti);
- if (ret)
+ rhashtable_walk_enter(&gl_hash_table, &gi->hti);
+ if (rhashtable_walk_start(&gi->hti) != 0)
return NULL;
do {
@@ -1959,6 +1955,7 @@ static void *gfs2_glock_seq_start(struct seq_file *seq, loff_t *pos)
} while (gi->gl && n--);
gi->last_pos = *pos;
+
return gi->gl;
}
@@ -1970,6 +1967,7 @@ static void *gfs2_glock_seq_next(struct seq_file *seq, void *iter_ptr,
(*pos)++;
gi->last_pos = *pos;
gfs2_glock_iter_next(gi);
+
return gi->gl;
}
@@ -1980,6 +1978,7 @@ static void gfs2_glock_seq_stop(struct seq_file *seq, void *iter_ptr)
gi->gl = NULL;
rhashtable_walk_stop(&gi->hti);
+ rhashtable_walk_exit(&gi->hti);
}
static int gfs2_glock_seq_show(struct seq_file *seq, void *iter_ptr)
@@ -2042,12 +2041,10 @@ static int __gfs2_glocks_open(struct inode *inode, struct file *file,
struct gfs2_glock_iter *gi = seq->private;
gi->sdp = inode->i_private;
- gi->last_pos = 0;
seq->buf = kmalloc(GFS2_SEQ_GOODSIZE, GFP_KERNEL | __GFP_NOWARN);
if (seq->buf)
seq->size = GFS2_SEQ_GOODSIZE;
gi->gl = NULL;
- rhashtable_walk_enter(&gl_hash_table, &gi->hti);
}
return ret;
}
@@ -2063,7 +2060,6 @@ static int gfs2_glocks_release(struct inode *inode, struct file *file)
struct gfs2_glock_iter *gi = seq->private;
gi->gl = NULL;
- rhashtable_walk_exit(&gi->hti);
return seq_release_private(inode, file);
}