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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-13 17:45:40 -0600
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-13 17:45:40 -0600
commitcec997093bbff881c3da49084dfba4f76361e96a (patch)
tree7c84f8c30ceef7209a18d7cd216a3c16536008c5 /fs/reiserfs/do_balan.c
parent8d2d441ac4af223eae466c3c31ff737cc31a1411 (diff)
parent01777836c87081e4f68c4a43c9abe6114805f91e (diff)
downloadop-kernel-dev-cec997093bbff881c3da49084dfba4f76361e96a.zip
op-kernel-dev-cec997093bbff881c3da49084dfba4f76361e96a.tar.gz
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull quota, reiserfs, UDF updates from Jan Kara: "Scalability improvements for quota, a few reiserfs fixes, and couple of misc cleanups (udf, ext2)" * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: reiserfs: Fix use after free in journal teardown reiserfs: fix corruption introduced by balance_leaf refactor udf: avoid redundant memcpy when writing data in ICB fs/udf: re-use hex_asc_upper_{hi,lo} macros fs/quota: kernel-doc warning fixes udf: use linux/uaccess.h fs/ext2/super.c: Drop memory allocation cast quota: remove dqptr_sem quota: simplify remove_inode_dquot_ref() quota: avoid unnecessary dqget()/dqput() calls quota: protect Q_GETFMT by dqonoff_mutex
Diffstat (limited to 'fs/reiserfs/do_balan.c')
-rw-r--r--fs/reiserfs/do_balan.c111
1 files changed, 63 insertions, 48 deletions
diff --git a/fs/reiserfs/do_balan.c b/fs/reiserfs/do_balan.c
index 5739cb9..9c02d96 100644
--- a/fs/reiserfs/do_balan.c
+++ b/fs/reiserfs/do_balan.c
@@ -286,12 +286,14 @@ static int balance_leaf_when_delete(struct tree_balance *tb, int flag)
return 0;
}
-static void balance_leaf_insert_left(struct tree_balance *tb,
- struct item_head *ih, const char *body)
+static unsigned int balance_leaf_insert_left(struct tree_balance *tb,
+ struct item_head *const ih,
+ const char * const body)
{
int ret;
struct buffer_info bi;
int n = B_NR_ITEMS(tb->L[0]);
+ unsigned body_shift_bytes = 0;
if (tb->item_pos == tb->lnum[0] - 1 && tb->lbytes != -1) {
/* part of new item falls into L[0] */
@@ -329,7 +331,7 @@ static void balance_leaf_insert_left(struct tree_balance *tb,
put_ih_item_len(ih, new_item_len);
if (tb->lbytes > tb->zeroes_num) {
- body += (tb->lbytes - tb->zeroes_num);
+ body_shift_bytes = tb->lbytes - tb->zeroes_num;
tb->zeroes_num = 0;
} else
tb->zeroes_num -= tb->lbytes;
@@ -349,11 +351,12 @@ static void balance_leaf_insert_left(struct tree_balance *tb,
tb->insert_size[0] = 0;
tb->zeroes_num = 0;
}
+ return body_shift_bytes;
}
static void balance_leaf_paste_left_shift_dirent(struct tree_balance *tb,
- struct item_head *ih,
- const char *body)
+ struct item_head * const ih,
+ const char * const body)
{
int n = B_NR_ITEMS(tb->L[0]);
struct buffer_info bi;
@@ -413,17 +416,18 @@ static void balance_leaf_paste_left_shift_dirent(struct tree_balance *tb,
tb->pos_in_item -= tb->lbytes;
}
-static void balance_leaf_paste_left_shift(struct tree_balance *tb,
- struct item_head *ih,
- const char *body)
+static unsigned int balance_leaf_paste_left_shift(struct tree_balance *tb,
+ struct item_head * const ih,
+ const char * const body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
int n = B_NR_ITEMS(tb->L[0]);
struct buffer_info bi;
+ int body_shift_bytes = 0;
if (is_direntry_le_ih(item_head(tbS0, tb->item_pos))) {
balance_leaf_paste_left_shift_dirent(tb, ih, body);
- return;
+ return 0;
}
RFALSE(tb->lbytes <= 0,
@@ -497,7 +501,7 @@ static void balance_leaf_paste_left_shift(struct tree_balance *tb,
* insert_size[0]
*/
if (l_n > tb->zeroes_num) {
- body += (l_n - tb->zeroes_num);
+ body_shift_bytes = l_n - tb->zeroes_num;
tb->zeroes_num = 0;
} else
tb->zeroes_num -= l_n;
@@ -526,13 +530,14 @@ static void balance_leaf_paste_left_shift(struct tree_balance *tb,
*/
leaf_shift_left(tb, tb->lnum[0], tb->lbytes);
}
+ return body_shift_bytes;
}
/* appended item will be in L[0] in whole */
static void balance_leaf_paste_left_whole(struct tree_balance *tb,
- struct item_head *ih,
- const char *body)
+ struct item_head * const ih,
+ const char * const body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
int n = B_NR_ITEMS(tb->L[0]);
@@ -584,39 +589,44 @@ static void balance_leaf_paste_left_whole(struct tree_balance *tb,
tb->zeroes_num = 0;
}
-static void balance_leaf_paste_left(struct tree_balance *tb,
- struct item_head *ih, const char *body)
+static unsigned int balance_leaf_paste_left(struct tree_balance *tb,
+ struct item_head * const ih,
+ const char * const body)
{
/* we must shift the part of the appended item */
if (tb->item_pos == tb->lnum[0] - 1 && tb->lbytes != -1)
- balance_leaf_paste_left_shift(tb, ih, body);
+ return balance_leaf_paste_left_shift(tb, ih, body);
else
balance_leaf_paste_left_whole(tb, ih, body);
+ return 0;
}
/* Shift lnum[0] items from S[0] to the left neighbor L[0] */
-static void balance_leaf_left(struct tree_balance *tb, struct item_head *ih,
- const char *body, int flag)
+static unsigned int balance_leaf_left(struct tree_balance *tb,
+ struct item_head * const ih,
+ const char * const body, int flag)
{
if (tb->lnum[0] <= 0)
- return;
+ return 0;
/* new item or it part falls to L[0], shift it too */
if (tb->item_pos < tb->lnum[0]) {
BUG_ON(flag != M_INSERT && flag != M_PASTE);
if (flag == M_INSERT)
- balance_leaf_insert_left(tb, ih, body);
+ return balance_leaf_insert_left(tb, ih, body);
else /* M_PASTE */
- balance_leaf_paste_left(tb, ih, body);
+ return balance_leaf_paste_left(tb, ih, body);
} else
/* new item doesn't fall into L[0] */
leaf_shift_left(tb, tb->lnum[0], tb->lbytes);
+ return 0;
}
static void balance_leaf_insert_right(struct tree_balance *tb,
- struct item_head *ih, const char *body)
+ struct item_head * const ih,
+ const char * const body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
@@ -704,7 +714,8 @@ static void balance_leaf_insert_right(struct tree_balance *tb,
static void balance_leaf_paste_right_shift_dirent(struct tree_balance *tb,
- struct item_head *ih, const char *body)
+ struct item_head * const ih,
+ const char * const body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
struct buffer_info bi;
@@ -754,7 +765,8 @@ static void balance_leaf_paste_right_shift_dirent(struct tree_balance *tb,
}
static void balance_leaf_paste_right_shift(struct tree_balance *tb,
- struct item_head *ih, const char *body)
+ struct item_head * const ih,
+ const char * const body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
int n_shift, n_rem, r_zeroes_number, version;
@@ -831,7 +843,8 @@ static void balance_leaf_paste_right_shift(struct tree_balance *tb,
}
static void balance_leaf_paste_right_whole(struct tree_balance *tb,
- struct item_head *ih, const char *body)
+ struct item_head * const ih,
+ const char * const body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
int n = B_NR_ITEMS(tbS0);
@@ -874,7 +887,8 @@ static void balance_leaf_paste_right_whole(struct tree_balance *tb,
}
static void balance_leaf_paste_right(struct tree_balance *tb,
- struct item_head *ih, const char *body)
+ struct item_head * const ih,
+ const char * const body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
int n = B_NR_ITEMS(tbS0);
@@ -896,8 +910,9 @@ static void balance_leaf_paste_right(struct tree_balance *tb,
}
/* shift rnum[0] items from S[0] to the right neighbor R[0] */
-static void balance_leaf_right(struct tree_balance *tb, struct item_head *ih,
- const char *body, int flag)
+static void balance_leaf_right(struct tree_balance *tb,
+ struct item_head * const ih,
+ const char * const body, int flag)
{
if (tb->rnum[0] <= 0)
return;
@@ -911,8 +926,8 @@ static void balance_leaf_right(struct tree_balance *tb, struct item_head *ih,
}
static void balance_leaf_new_nodes_insert(struct tree_balance *tb,
- struct item_head *ih,
- const char *body,
+ struct item_head * const ih,
+ const char * const body,
struct item_head *insert_key,
struct buffer_head **insert_ptr,
int i)
@@ -1003,8 +1018,8 @@ static void balance_leaf_new_nodes_insert(struct tree_balance *tb,
/* we append to directory item */
static void balance_leaf_new_nodes_paste_dirent(struct tree_balance *tb,
- struct item_head *ih,
- const char *body,
+ struct item_head * const ih,
+ const char * const body,
struct item_head *insert_key,
struct buffer_head **insert_ptr,
int i)
@@ -1058,8 +1073,8 @@ static void balance_leaf_new_nodes_paste_dirent(struct tree_balance *tb,
}
static void balance_leaf_new_nodes_paste_shift(struct tree_balance *tb,
- struct item_head *ih,
- const char *body,
+ struct item_head * const ih,
+ const char * const body,
struct item_head *insert_key,
struct buffer_head **insert_ptr,
int i)
@@ -1131,8 +1146,8 @@ static void balance_leaf_new_nodes_paste_shift(struct tree_balance *tb,
}
static void balance_leaf_new_nodes_paste_whole(struct tree_balance *tb,
- struct item_head *ih,
- const char *body,
+ struct item_head * const ih,
+ const char * const body,
struct item_head *insert_key,
struct buffer_head **insert_ptr,
int i)
@@ -1184,8 +1199,8 @@ static void balance_leaf_new_nodes_paste_whole(struct tree_balance *tb,
}
static void balance_leaf_new_nodes_paste(struct tree_balance *tb,
- struct item_head *ih,
- const char *body,
+ struct item_head * const ih,
+ const char * const body,
struct item_head *insert_key,
struct buffer_head **insert_ptr,
int i)
@@ -1214,8 +1229,8 @@ static void balance_leaf_new_nodes_paste(struct tree_balance *tb,
/* Fill new nodes that appear in place of S[0] */
static void balance_leaf_new_nodes(struct tree_balance *tb,
- struct item_head *ih,
- const char *body,
+ struct item_head * const ih,
+ const char * const body,
struct item_head *insert_key,
struct buffer_head **insert_ptr,
int flag)
@@ -1254,8 +1269,8 @@ static void balance_leaf_new_nodes(struct tree_balance *tb,
}
static void balance_leaf_finish_node_insert(struct tree_balance *tb,
- struct item_head *ih,
- const char *body)
+ struct item_head * const ih,
+ const char * const body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
struct buffer_info bi;
@@ -1271,8 +1286,8 @@ static void balance_leaf_finish_node_insert(struct tree_balance *tb,
}
static void balance_leaf_finish_node_paste_dirent(struct tree_balance *tb,
- struct item_head *ih,
- const char *body)
+ struct item_head * const ih,
+ const char * const body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
struct item_head *pasted = item_head(tbS0, tb->item_pos);
@@ -1305,8 +1320,8 @@ static void balance_leaf_finish_node_paste_dirent(struct tree_balance *tb,
}
static void balance_leaf_finish_node_paste(struct tree_balance *tb,
- struct item_head *ih,
- const char *body)
+ struct item_head * const ih,
+ const char * const body)
{
struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
struct buffer_info bi;
@@ -1349,8 +1364,8 @@ static void balance_leaf_finish_node_paste(struct tree_balance *tb,
* of the affected item which remains in S
*/
static void balance_leaf_finish_node(struct tree_balance *tb,
- struct item_head *ih,
- const char *body, int flag)
+ struct item_head * const ih,
+ const char * const body, int flag)
{
/* if we must insert or append into buffer S[0] */
if (0 <= tb->item_pos && tb->item_pos < tb->s0num) {
@@ -1402,7 +1417,7 @@ static int balance_leaf(struct tree_balance *tb, struct item_head *ih,
&& is_indirect_le_ih(item_head(tbS0, tb->item_pos)))
tb->pos_in_item *= UNFM_P_SIZE;
- balance_leaf_left(tb, ih, body, flag);
+ body += balance_leaf_left(tb, ih, body, flag);
/* tb->lnum[0] > 0 */
/* Calculate new item position */
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