diff options
| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2011-05-19 15:13:16 +0400 |
|---|---|---|
| committer | Artem Bityutskiy <dedekind1@gmail.com> | 2011-07-04 11:54:26 +0400 |
| commit | ae380ce04731579f45f27b3a84d7d8d8ee1f9b1b (patch) | |
| tree | f887f69b40899eb6bc5a61554da9485100ed2f89 /fs/ubifs/debug.c | |
| parent | 549c999a768a7a144c60a0faa58f34c48f39112b (diff) | |
| download | linux-ae380ce04731579f45f27b3a84d7d8d8ee1f9b1b.tar.xz | |
UBIFS: lessen the size of debugging info data structure
This patch lessens the 'struct ubifs_debug_info' size by 90 bytes by
allocating less bytes for the debugfs root directory name. It introduces macros
for the name patter an length instead of hard-coding 100 bytes. It also makes
UBIFS use 'snprintf()' and teaches it to gracefully catch situations when the
name array is too short.
Additionally, this patch makes 2 unrelated changes - I just thought they do not
deserve separate commits: simplifies 'ubifs_assert()' for non-debugging case
and makes 'dbg_debugfs_init()' properly verify debugfs return code which may be
an error code or NULL, so we should you 'IS_ERR_OR_NULL()' instead of
'IS_ERR()'.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs/debug.c')
| -rw-r--r-- | fs/ubifs/debug.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c index 0bb2bcef0de9..c9609a63512e 100644 --- a/fs/ubifs/debug.c +++ b/fs/ubifs/debug.c @@ -2815,8 +2815,8 @@ static struct dentry *dfs_rootdir; int dbg_debugfs_init(void) { dfs_rootdir = debugfs_create_dir("ubifs", NULL); - if (IS_ERR(dfs_rootdir)) { - int err = PTR_ERR(dfs_rootdir); + if (IS_ERR_OR_NULL(dfs_rootdir)) { + int err = dfs_rootdir ? PTR_ERR(dfs_rootdir) : -ENODEV; ubifs_err("cannot create \"ubifs\" debugfs directory, " "error %d\n", err); return err; @@ -2880,12 +2880,20 @@ static const struct file_operations dfs_fops = { */ int dbg_debugfs_init_fs(struct ubifs_info *c) { - int err; + int err, n; const char *fname; struct dentry *dent; struct ubifs_debug_info *d = c->dbg; - sprintf(d->dfs_dir_name, "ubi%d_%d", c->vi.ubi_num, c->vi.vol_id); + n = snprintf(d->dfs_dir_name, UBIFS_DFS_DIR_LEN + 1, UBIFS_DFS_DIR_NAME, + c->vi.ubi_num, c->vi.vol_id); + if (n == UBIFS_DFS_DIR_LEN) { + /* The array size is too small */ + fname = UBIFS_DFS_DIR_NAME; + dent = ERR_PTR(-EINVAL); + goto out; + } + fname = d->dfs_dir_name; dent = debugfs_create_dir(fname, dfs_rootdir); if (IS_ERR_OR_NULL(dent)) @@ -2916,7 +2924,7 @@ out_remove: debugfs_remove_recursive(d->dfs_dir); out: err = dent ? PTR_ERR(dent) : -ENODEV; - ubifs_err("cannot create \"%s\" debugfs directory, error %d\n", + ubifs_err("cannot create \"%s\" debugfs filr or directory, error %d\n", fname, err); return err; } |