The patch titled
address hfs on-disk corruption robustness review comments
has been removed from the -mm tree. Its filename was
address-hfs-on-disk-corruption-robustness-review-comments.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: address hfs on-disk corruption robustness review comments
From: Eric Sandeen <sandeen@xxxxxxxxxx>
Address Roman's review comments for the previously sent on-disk
corruption hfs robustness patch.
- use 0 as a failure value, rather than making a new macro HFS_BAD_KEYLEN,
and use a switch statement instead of if's.
- Add new fail: target to __hfs_brec_find to skip assignments using bad
values when exiting with a failure.
[akpm@xxxxxxxxxxxxxxxxxxxx: coding-style fixes]
Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
Cc: Roman Zippel <zippel@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/hfs/bfind.c | 11 ++++++-----
fs/hfs/brec.c | 4 ++--
fs/hfs/btree.c | 26 +++++++++++++++++---------
fs/hfs/hfs.h | 2 --
4 files changed, 25 insertions(+), 18 deletions(-)
diff -puN fs/hfs/bfind.c~address-hfs-on-disk-corruption-robustness-review-comments fs/hfs/bfind.c
--- a/fs/hfs/bfind.c~address-hfs-on-disk-corruption-robustness-review-comments
+++ a/fs/hfs/bfind.c
@@ -52,9 +52,9 @@ int __hfs_brec_find(struct hfs_bnode *bn
rec = (e + b) / 2;
len = hfs_brec_lenoff(bnode, rec, &off);
keylen = hfs_brec_keylen(bnode, rec);
- if (keylen == HFS_BAD_KEYLEN) {
+ if (keylen == 0) {
res = -EINVAL;
- goto done;
+ goto fail;
}
hfs_bnode_read(bnode, fd->key, off, keylen);
cmpval = bnode->tree->keycmp(fd->key, fd->search_key);
@@ -71,9 +71,9 @@ int __hfs_brec_find(struct hfs_bnode *bn
if (rec != e && e >= 0) {
len = hfs_brec_lenoff(bnode, e, &off);
keylen = hfs_brec_keylen(bnode, e);
- if (keylen == HFS_BAD_KEYLEN) {
+ if (keylen == 0) {
res = -EINVAL;
- goto done;
+ goto fail;
}
hfs_bnode_read(bnode, fd->key, off, keylen);
}
@@ -83,6 +83,7 @@ done:
fd->keylength = keylen;
fd->entryoffset = off + keylen;
fd->entrylength = len - keylen;
+fail:
return res;
}
@@ -206,7 +207,7 @@ int hfs_brec_goto(struct hfs_find_data *
len = hfs_brec_lenoff(bnode, fd->record, &off);
keylen = hfs_brec_keylen(bnode, fd->record);
- if (keylen == HFS_BAD_KEYLEN) {
+ if (keylen == 0) {
res = -EINVAL;
goto out;
}
diff -puN fs/hfs/brec.c~address-hfs-on-disk-corruption-robustness-review-comments fs/hfs/brec.c
--- a/fs/hfs/brec.c~address-hfs-on-disk-corruption-robustness-review-comments
+++ a/fs/hfs/brec.c
@@ -49,14 +49,14 @@ u16 hfs_brec_keylen(struct hfs_bnode *no
if (retval > node->tree->max_key_len + 2) {
printk(KERN_ERR "hfs: keylen %d too large\n",
retval);
- retval = HFS_BAD_KEYLEN;
+ retval = 0;
}
} else {
retval = (hfs_bnode_read_u8(node, recoff) | 1) + 1;
if (retval > node->tree->max_key_len + 1) {
printk(KERN_ERR "hfs: keylen %d too large\n",
retval);
- retval = HFS_BAD_KEYLEN;
+ retval = 0;
}
}
}
diff -puN fs/hfs/btree.c~address-hfs-on-disk-corruption-robustness-review-comments fs/hfs/btree.c
--- a/fs/hfs/btree.c~address-hfs-on-disk-corruption-robustness-review-comments
+++ a/fs/hfs/btree.c
@@ -81,15 +81,23 @@ struct hfs_btree *hfs_btree_open(struct
goto fail_page;
if (!tree->node_count)
goto fail_page;
- if ((id == HFS_EXT_CNID) && (tree->max_key_len != HFS_MAX_EXT_KEYLEN)) {
- printk(KERN_ERR "hfs: invalid extent max_key_len %d\n",
- tree->max_key_len);
- goto fail_page;
- }
- if ((id == HFS_CAT_CNID) && (tree->max_key_len != HFS_MAX_CAT_KEYLEN)) {
- printk(KERN_ERR "hfs: invalid catalog max_key_len %d\n",
- tree->max_key_len);
- goto fail_page;
+ switch (id) {
+ case HFS_EXT_CNID:
+ if (tree->max_key_len != HFS_MAX_EXT_KEYLEN) {
+ printk(KERN_ERR "hfs: invalid extent max_key_len %d\n",
+ tree->max_key_len);
+ goto fail_page;
+ }
+ break;
+ case HFS_CAT_CNID:
+ if (tree->max_key_len != HFS_MAX_CAT_KEYLEN) {
+ printk(KERN_ERR "hfs: invalid catalog max_key_len %d\n",
+ tree->max_key_len);
+ goto fail_page;
+ }
+ break;
+ default:
+ BUG();
}
tree->node_size_shift = ffs(size) - 1;
diff -puN fs/hfs/hfs.h~address-hfs-on-disk-corruption-robustness-review-comments fs/hfs/hfs.h
--- a/fs/hfs/hfs.h~address-hfs-on-disk-corruption-robustness-review-comments
+++ a/fs/hfs/hfs.h
@@ -28,8 +28,6 @@
#define HFS_MAX_NAMELEN 128
#define HFS_MAX_VALENCE 32767U
-#define HFS_BAD_KEYLEN 0xFF
-
/* Meanings of the drAtrb field of the MDB,
* Reference: _Inside Macintosh: Files_ p. 2-61
*/
_
Patches currently in -mm which might be from sandeen@xxxxxxxxxx are
origin.patch
reduce-large-do_mount-stack-usage-with-noinlines.patch
-
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