diff options
| author | Robert Peterson <rpeterso@redhat.com> | 2007-04-18 11:41:11 -0500 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2007-05-01 09:11:33 +0100 |
| commit | 5f8820960cf4fb621483d4a37c24939ad831bfe7 (patch) | |
| tree | 8efc44452a7d353c41cefaf1b053a37868fb72c1 /fs/gfs2 | |
| parent | bdd19a22f85a7039e01accd8717eaec4addd9dfd (diff) | |
| download | linux-5f8820960cf4fb621483d4a37c24939ad831bfe7.tar.bz2 | |
[GFS2] lockdump improvements
The patch below consists of the following changes (in code order):
1. I fixed a minor compiler warning regarding the printing of
a kernel symbol address.
2. I implemented a suggestion from Dave Teigland that moves
the debugfs information for gfs2 into a subdirectory so
we can easily expand our use of debugfs in the future.
The current code keeps the glock information in:
/debug/gfs2/<fs>
With the patch, the new code keeps the glock information in:
/debug/gfs2/<fs>/glock
That will allow us to create more debugfs files in the future.
3. This fixes a bug whereby a failed mount attempt causes the
debugfs file to not be deleted. Failed mount attempts should
always clean up after themselves, including deleting the
debugfs file and/or directory.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
| -rw-r--r-- | fs/gfs2/glock.c | 26 | ||||
| -rw-r--r-- | fs/gfs2/incore.h | 3 | ||||
| -rw-r--r-- | fs/gfs2/ops_fstype.c | 1 |
3 files changed, 21 insertions, 9 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index b075f9359c60..7988715b7a07 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -1774,7 +1774,7 @@ static void gfs2_print_symbol(struct glock_iter *gi, const char *fmt, if (gi) { memset(buffer, 0, sizeof(buffer)); - sprintf(buffer, "%p", address); + sprintf(buffer, "0x%08lx", address); print_dbg(gi, fmt, buffer); } else @@ -2146,11 +2146,14 @@ static const struct file_operations gfs2_debug_fops = { int gfs2_create_debugfs_file(struct gfs2_sbd *sdp) { - sdp->debugfs_dentry = debugfs_create_file(sdp->sd_table_name, - S_IFREG | S_IRUGO, - gfs2_root, sdp, - &gfs2_debug_fops); - if (!sdp->debugfs_dentry) + sdp->debugfs_dir = debugfs_create_dir(sdp->sd_table_name, gfs2_root); + if (!sdp->debugfs_dir) + return -ENOMEM; + sdp->debugfs_dentry_glocks = debugfs_create_file("glocks", + S_IFREG | S_IRUGO, + sdp->debugfs_dir, sdp, + &gfs2_debug_fops); + if (!sdp->debugfs_dentry_glocks) return -ENOMEM; return 0; @@ -2158,8 +2161,14 @@ int gfs2_create_debugfs_file(struct gfs2_sbd *sdp) void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp) { - if (sdp && sdp->debugfs_dentry) - debugfs_remove(sdp->debugfs_dentry); + if (sdp && sdp->debugfs_dir) { + if (sdp->debugfs_dentry_glocks) { + debugfs_remove(sdp->debugfs_dentry_glocks); + sdp->debugfs_dentry_glocks = NULL; + } + debugfs_remove(sdp->debugfs_dir); + sdp->debugfs_dir = NULL; + } } int gfs2_register_debugfs(void) @@ -2171,4 +2180,5 @@ int gfs2_register_debugfs(void) void gfs2_unregister_debugfs(void) { debugfs_remove(gfs2_root); + gfs2_root = NULL; } diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h index fdf04705906f..d995441373ab 100644 --- a/fs/gfs2/incore.h +++ b/fs/gfs2/incore.h @@ -609,7 +609,8 @@ struct gfs2_sbd { unsigned long sd_last_warning; struct vfsmount *sd_gfs2mnt; - struct dentry *debugfs_dentry; /* for debugfs */ + struct dentry *debugfs_dir; /* debugfs directory */ + struct dentry *debugfs_dentry_glocks; /* for debugfs */ }; #endif /* __INCORE_DOT_H__ */ diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index ecb8b18de0ee..2c5f8e7def0d 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -756,6 +756,7 @@ fail_lm: fail_sys: gfs2_sys_fs_del(sdp); fail: + gfs2_delete_debugfs_file(sdp); kfree(sdp); sb->s_fs_info = NULL; return error; |