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Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff
[linux-2.6.git]
/
fs
/
ufs
/
truncate.c
diff --git
a/fs/ufs/truncate.c
b/fs/ufs/truncate.c
index
e312bf8
..
02e8629
100644
(file)
--- a/
fs/ufs/truncate.c
+++ b/
fs/ufs/truncate.c
@@
-29,6
+29,11
@@
* Idea from Pierre del Perugia <delperug@gla.ecoledoc.ibp.fr>
*/
* Idea from Pierre del Perugia <delperug@gla.ecoledoc.ibp.fr>
*/
+/*
+ * Modified to avoid infinite loop on 2006 by
+ * Evgeniy Dushistov <dushistov@mail.ru>
+ */
+
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ufs_fs.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ufs_fs.h>
@@
-65,19
+70,16
@@
#define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
#define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
-#define DATA_BUFFER_USED(bh) \
- (atomic_read(&bh->b_count)>1 || buffer_locked(bh))
static int ufs_trunc_direct (struct inode * inode)
{
struct ufs_inode_info *ufsi = UFS_I(inode);
struct super_block * sb;
struct ufs_sb_private_info * uspi;
static int ufs_trunc_direct (struct inode * inode)
{
struct ufs_inode_info *ufsi = UFS_I(inode);
struct super_block * sb;
struct ufs_sb_private_info * uspi;
- struct buffer_head * bh;
__fs32 * p;
unsigned frag1, frag2, frag3, frag4, block1, block2;
unsigned frag_to_free, free_count;
__fs32 * p;
unsigned frag1, frag2, frag3, frag4, block1, block2;
unsigned frag_to_free, free_count;
- unsigned i,
j,
tmp;
+ unsigned i, tmp;
int retry;
UFSD(("ENTER\n"))
int retry;
UFSD(("ENTER\n"))
@@
-117,15
+119,7
@@
static int ufs_trunc_direct (struct inode * inode)
ufs_panic (sb, "ufs_trunc_direct", "internal error");
frag1 = ufs_fragnum (frag1);
frag2 = ufs_fragnum (frag2);
ufs_panic (sb, "ufs_trunc_direct", "internal error");
frag1 = ufs_fragnum (frag1);
frag2 = ufs_fragnum (frag2);
- for (j = frag1; j < frag2; j++) {
- bh = sb_find_get_block (sb, tmp + j);
- if ((bh && DATA_BUFFER_USED(bh)) || tmp != fs32_to_cpu(sb, *p)) {
- retry = 1;
- brelse (bh);
- goto next1;
- }
- bforget (bh);
- }
+
inode->i_blocks -= (frag2-frag1) << uspi->s_nspfshift;
mark_inode_dirty(inode);
ufs_free_fragments (inode, tmp + frag1, frag2 - frag1);
inode->i_blocks -= (frag2-frag1) << uspi->s_nspfshift;
mark_inode_dirty(inode);
ufs_free_fragments (inode, tmp + frag1, frag2 - frag1);
@@
-140,15
+134,7
@@
next1:
tmp = fs32_to_cpu(sb, *p);
if (!tmp)
continue;
tmp = fs32_to_cpu(sb, *p);
if (!tmp)
continue;
- for (j = 0; j < uspi->s_fpb; j++) {
- bh = sb_find_get_block(sb, tmp + j);
- if ((bh && DATA_BUFFER_USED(bh)) || tmp != fs32_to_cpu(sb, *p)) {
- retry = 1;
- brelse (bh);
- goto next2;
- }
- bforget (bh);
- }
+
*p = 0;
inode->i_blocks -= uspi->s_nspb;
mark_inode_dirty(inode);
*p = 0;
inode->i_blocks -= uspi->s_nspb;
mark_inode_dirty(inode);
@@
-162,7
+148,6
@@
next1:
frag_to_free = tmp;
free_count = uspi->s_fpb;
}
frag_to_free = tmp;
free_count = uspi->s_fpb;
}
-next2:;
}
if (free_count > 0)
}
if (free_count > 0)
@@
-179,15
+164,7
@@
next2:;
if (!tmp )
ufs_panic(sb, "ufs_truncate_direct", "internal error");
frag4 = ufs_fragnum (frag4);
if (!tmp )
ufs_panic(sb, "ufs_truncate_direct", "internal error");
frag4 = ufs_fragnum (frag4);
- for (j = 0; j < frag4; j++) {
- bh = sb_find_get_block (sb, tmp + j);
- if ((bh && DATA_BUFFER_USED(bh)) || tmp != fs32_to_cpu(sb, *p)) {
- retry = 1;
- brelse (bh);
- goto next1;
- }
- bforget (bh);
- }
+
*p = 0;
inode->i_blocks -= frag4 << uspi->s_nspfshift;
mark_inode_dirty(inode);
*p = 0;
inode->i_blocks -= frag4 << uspi->s_nspfshift;
mark_inode_dirty(inode);
@@
-204,9
+181,8
@@
static int ufs_trunc_indirect (struct inode * inode, unsigned offset, __fs32 *p)
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_buffer_head * ind_ubh;
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_buffer_head * ind_ubh;
- struct buffer_head * bh;
__fs32 * ind;
__fs32 * ind;
- unsigned indirect_block, i,
j,
tmp;
+ unsigned indirect_block, i, tmp;
unsigned frag_to_free, free_count;
int retry;
unsigned frag_to_free, free_count;
int retry;
@@
-238,15
+214,7
@@
static int ufs_trunc_indirect (struct inode * inode, unsigned offset, __fs32 *p)
tmp = fs32_to_cpu(sb, *ind);
if (!tmp)
continue;
tmp = fs32_to_cpu(sb, *ind);
if (!tmp)
continue;
- for (j = 0; j < uspi->s_fpb; j++) {
- bh = sb_find_get_block(sb, tmp + j);
- if ((bh && DATA_BUFFER_USED(bh)) || tmp != fs32_to_cpu(sb, *ind)) {
- retry = 1;
- brelse (bh);
- goto next;
- }
- bforget (bh);
- }
+
*ind = 0;
ubh_mark_buffer_dirty(ind_ubh);
if (free_count == 0) {
*ind = 0;
ubh_mark_buffer_dirty(ind_ubh);
if (free_count == 0) {
@@
-261,7
+229,6
@@
static int ufs_trunc_indirect (struct inode * inode, unsigned offset, __fs32 *p)
}
inode->i_blocks -= uspi->s_nspb;
mark_inode_dirty(inode);
}
inode->i_blocks -= uspi->s_nspb;
mark_inode_dirty(inode);
-next:;
}
if (free_count > 0) {
}
if (free_count > 0) {
@@
-285,8
+252,7
@@
next:;
}
}
if (IS_SYNC(inode) && ind_ubh && ubh_buffer_dirty(ind_ubh)) {
}
}
if (IS_SYNC(inode) && ind_ubh && ubh_buffer_dirty(ind_ubh)) {
- ubh_wait_on_buffer (ind_ubh);
- ubh_ll_rw_block (WRITE, 1, &ind_ubh);
+ ubh_ll_rw_block (SWRITE, 1, &ind_ubh);
ubh_wait_on_buffer (ind_ubh);
}
ubh_brelse (ind_ubh);
ubh_wait_on_buffer (ind_ubh);
}
ubh_brelse (ind_ubh);
@@
-353,8
+319,7
@@
static int ufs_trunc_dindirect (struct inode *inode, unsigned offset, __fs32 *p)
}
}
if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh)) {
}
}
if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh)) {
- ubh_wait_on_buffer (dind_bh);
- ubh_ll_rw_block (WRITE, 1, &dind_bh);
+ ubh_ll_rw_block (SWRITE, 1, &dind_bh);
ubh_wait_on_buffer (dind_bh);
}
ubh_brelse (dind_bh);
ubh_wait_on_buffer (dind_bh);
}
ubh_brelse (dind_bh);
@@
-418,8
+383,7
@@
static int ufs_trunc_tindirect (struct inode * inode)
}
}
if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh)) {
}
}
if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh)) {
- ubh_wait_on_buffer (tind_bh);
- ubh_ll_rw_block (WRITE, 1, &tind_bh);
+ ubh_ll_rw_block (SWRITE, 1, &tind_bh);
ubh_wait_on_buffer (tind_bh);
}
ubh_brelse (tind_bh);
ubh_wait_on_buffer (tind_bh);
}
ubh_brelse (tind_bh);
@@
-433,9
+397,7
@@
void ufs_truncate (struct inode * inode)
struct ufs_inode_info *ufsi = UFS_I(inode);
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_inode_info *ufsi = UFS_I(inode);
struct super_block * sb;
struct ufs_sb_private_info * uspi;
- struct buffer_head * bh;
- unsigned offset;
- int err, retry;
+ int retry;
UFSD(("ENTER\n"))
sb = inode->i_sb;
UFSD(("ENTER\n"))
sb = inode->i_sb;
@@
-445,6
+407,9
@@
void ufs_truncate (struct inode * inode)
return;
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
return;
return;
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
return;
+
+ block_truncate_page(inode->i_mapping, inode->i_size, ufs_getfrag_block);
+
lock_kernel();
while (1) {
retry = ufs_trunc_direct(inode);
lock_kernel();
while (1) {
retry = ufs_trunc_direct(inode);
@@
-460,15
+425,7
@@
void ufs_truncate (struct inode * inode)
blk_run_address_space(inode->i_mapping);
yield();
}
blk_run_address_space(inode->i_mapping);
yield();
}
- offset = inode->i_size & uspi->s_fshift;
- if (offset) {
- bh = ufs_bread (inode, inode->i_size >> uspi->s_fshift, 0, &err);
- if (bh) {
- memset (bh->b_data + offset, 0, uspi->s_fsize - offset);
- mark_buffer_dirty (bh);
- brelse (bh);
- }
- }
+
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
ufsi->i_lastfrag = DIRECT_FRAGMENT;
unlock_kernel();
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
ufsi->i_lastfrag = DIRECT_FRAGMENT;
unlock_kernel();