Subject: + ufs-sb-mutex-merge-mutex_destroy.patch added to -mm tree
To: fabf@xxxxxxxxx,dushistov@xxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 06 Jan 2014 15:00:53 -0800
The patch titled
Subject: ufs: sb mutex merge + mutex_destroy
has been added to the -mm tree. Its filename is
ufs-sb-mutex-merge-mutex_destroy.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ufs-sb-mutex-merge-mutex_destroy.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ufs-sb-mutex-merge-mutex_destroy.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Fabian Frederick <fabf@xxxxxxxxx>
Subject: ufs: sb mutex merge + mutex_destroy
788257d6101d9 ("ufs: remove the BKL") replaced BKL with mutex protection
using functions lock_ufs, unlock_ufs and struct mutex 'mutex' in sb_info.
b6963327e052 ("ufs: drop lock/unlock super") removed lock/unlock super and
added struct mutex 's_lock' in sb_info.
Those 2 mutexes are generally locked/unlocked at the same time except in
allocation (balloc, ialloc).
This patch merges the 2 mutexes and propagates first commit solution. It
also adds mutex destruction before kfree during ufs_fill_super failure and
ufs_put_super.
Signed-off-by: Fabian Frederick <fabf@xxxxxxxxx>
Cc: Evgeniy Dushistov <dushistov@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ufs/balloc.c | 30 +++++++++++++++---------------
fs/ufs/ialloc.c | 17 ++++++++---------
fs/ufs/super.c | 13 ++-----------
fs/ufs/ufs.h | 1 -
4 files changed, 25 insertions(+), 36 deletions(-)
diff -puN fs/ufs/balloc.c~ufs-sb-mutex-merge-mutex_destroy fs/ufs/balloc.c
--- a/fs/ufs/balloc.c~ufs-sb-mutex-merge-mutex_destroy
+++ a/fs/ufs/balloc.c
@@ -54,7 +54,7 @@ void ufs_free_fragments(struct inode *in
if (ufs_fragnum(fragment) + count > uspi->s_fpg)
ufs_error (sb, "ufs_free_fragments", "internal error");
- mutex_lock(&UFS_SB(sb)->s_lock);
+ lock_ufs(sb);
cgno = ufs_dtog(uspi, fragment);
bit = ufs_dtogd(uspi, fragment);
@@ -118,12 +118,12 @@ void ufs_free_fragments(struct inode *in
ubh_sync_block(UCPI_UBH(ucpi));
ufs_mark_sb_dirty(sb);
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
UFSD("EXIT\n");
return;
failed:
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
UFSD("EXIT (FAILED)\n");
return;
}
@@ -155,7 +155,7 @@ void ufs_free_blocks(struct inode *inode
goto failed;
}
- mutex_lock(&UFS_SB(sb)->s_lock);
+ lock_ufs(sb);
do_more:
overflow = 0;
@@ -215,12 +215,12 @@ do_more:
}
ufs_mark_sb_dirty(sb);
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
UFSD("EXIT\n");
return;
failed_unlock:
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
failed:
UFSD("EXIT (FAILED)\n");
return;
@@ -361,7 +361,7 @@ u64 ufs_new_fragments(struct inode *inod
usb1 = ubh_get_usb_first(uspi);
*err = -ENOSPC;
- mutex_lock(&UFS_SB(sb)->s_lock);
+ lock_ufs(sb);
tmp = ufs_data_ptr_to_cpu(sb, p);
if (count + ufs_fragnum(fragment) > uspi->s_fpb) {
@@ -382,19 +382,19 @@ u64 ufs_new_fragments(struct inode *inod
"fragment %llu, tmp %llu\n",
(unsigned long long)fragment,
(unsigned long long)tmp);
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
return INVBLOCK;
}
if (fragment < UFS_I(inode)->i_lastfrag) {
UFSD("EXIT (ALREADY ALLOCATED)\n");
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
return 0;
}
}
else {
if (tmp) {
UFSD("EXIT (ALREADY ALLOCATED)\n");
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
return 0;
}
}
@@ -403,7 +403,7 @@ u64 ufs_new_fragments(struct inode *inod
* There is not enough space for user on the device
*/
if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(uspi, UFS_MINFREE) <= 0) {
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
UFSD("EXIT (FAILED)\n");
return 0;
}
@@ -428,7 +428,7 @@ u64 ufs_new_fragments(struct inode *inod
ufs_clear_frags(inode, result + oldcount,
newcount - oldcount, locked_page != NULL);
}
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
@@ -443,7 +443,7 @@ u64 ufs_new_fragments(struct inode *inod
fragment + count);
ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
locked_page != NULL);
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
@@ -481,7 +481,7 @@ u64 ufs_new_fragments(struct inode *inod
*err = 0;
UFS_I(inode)->i_lastfrag = max(UFS_I(inode)->i_lastfrag,
fragment + count);
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
if (newcount < request)
ufs_free_fragments (inode, result + newcount, request - newcount);
ufs_free_fragments (inode, tmp, oldcount);
@@ -489,7 +489,7 @@ u64 ufs_new_fragments(struct inode *inod
return result;
}
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
UFSD("EXIT (FAILED)\n");
return 0;
}
diff -puN fs/ufs/ialloc.c~ufs-sb-mutex-merge-mutex_destroy fs/ufs/ialloc.c
--- a/fs/ufs/ialloc.c~ufs-sb-mutex-merge-mutex_destroy
+++ a/fs/ufs/ialloc.c
@@ -71,11 +71,11 @@ void ufs_free_inode (struct inode * inod
ino = inode->i_ino;
- mutex_lock(&UFS_SB(sb)->s_lock);
+ lock_ufs(sb);
if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) {
ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino);
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
return;
}
@@ -83,7 +83,7 @@ void ufs_free_inode (struct inode * inod
bit = ufs_inotocgoff (ino);
ucpi = ufs_load_cylinder (sb, cg);
if (!ucpi) {
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
return;
}
ucg = ubh_get_ucg(UCPI_UBH(ucpi));
@@ -117,7 +117,7 @@ void ufs_free_inode (struct inode * inod
ubh_sync_block(UCPI_UBH(ucpi));
ufs_mark_sb_dirty(sb);
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ unlock_ufs(sb);
UFSD("EXIT\n");
}
@@ -197,7 +197,7 @@ struct inode *ufs_new_inode(struct inode
uspi = sbi->s_uspi;
usb1 = ubh_get_usb_first(uspi);
- mutex_lock(&sbi->s_lock);
+ lock_ufs(sb);
/*
* Try to place the inode in its parent directory
@@ -332,21 +332,20 @@ cg_found:
sync_dirty_buffer(bh);
brelse(bh);
}
-
- mutex_unlock(&sbi->s_lock);
+ unlock_ufs(sb);
UFSD("allocating inode %lu\n", inode->i_ino);
UFSD("EXIT\n");
return inode;
fail_remove_inode:
- mutex_unlock(&sbi->s_lock);
+ unlock_ufs(sb);
clear_nlink(inode);
iput(inode);
UFSD("EXIT (FAILED): err %d\n", err);
return ERR_PTR(err);
failed:
- mutex_unlock(&sbi->s_lock);
+ unlock_ufs(sb);
make_bad_inode(inode);
iput (inode);
UFSD("EXIT (FAILED): err %d\n", err);
diff -puN fs/ufs/super.c~ufs-sb-mutex-merge-mutex_destroy fs/ufs/super.c
--- a/fs/ufs/super.c~ufs-sb-mutex-merge-mutex_destroy
+++ a/fs/ufs/super.c
@@ -699,7 +699,6 @@ static int ufs_sync_fs(struct super_bloc
unsigned flags;
lock_ufs(sb);
- mutex_lock(&UFS_SB(sb)->s_lock);
UFSD("ENTER\n");
@@ -717,7 +716,6 @@ static int ufs_sync_fs(struct super_bloc
ufs_put_cstotal(sb);
UFSD("EXIT\n");
- mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return 0;
@@ -762,6 +760,7 @@ static void ufs_put_super(struct super_b
ubh_brelse_uspi (sbi->s_uspi);
kfree (sbi->s_uspi);
+ mutex_destroy(&sbi->mutex);
kfree (sbi);
sb->s_fs_info = NULL;
UFSD("EXIT\n");
@@ -805,7 +804,6 @@ static int ufs_fill_super(struct super_b
}
#endif
mutex_init(&sbi->mutex);
- mutex_init(&sbi->s_lock);
spin_lock_init(&sbi->work_lock);
INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
/*
@@ -1262,6 +1260,7 @@ failed:
if (ubh)
ubh_brelse_uspi (uspi);
kfree (uspi);
+ mutex_destroy(&sbi->mutex);
kfree(sbi);
sb->s_fs_info = NULL;
UFSD("EXIT (FAILED)\n");
@@ -1281,7 +1280,6 @@ static int ufs_remount (struct super_blo
unsigned flags;
lock_ufs(sb);
- mutex_lock(&UFS_SB(sb)->s_lock);
uspi = UFS_SB(sb)->s_uspi;
flags = UFS_SB(sb)->s_flags;
usb1 = ubh_get_usb_first(uspi);
@@ -1295,7 +1293,6 @@ static int ufs_remount (struct super_blo
new_mount_opt = 0;
ufs_set_opt (new_mount_opt, ONERROR_LOCK);
if (!ufs_parse_options (data, &new_mount_opt)) {
- mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return -EINVAL;
}
@@ -1303,14 +1300,12 @@ static int ufs_remount (struct super_blo
new_mount_opt |= ufstype;
} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
printk("ufstype can't be changed during remount\n");
- mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return -EINVAL;
}
if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
UFS_SB(sb)->s_mount_opt = new_mount_opt;
- mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return 0;
}
@@ -1335,7 +1330,6 @@ static int ufs_remount (struct super_blo
#ifndef CONFIG_UFS_FS_WRITE
printk("ufs was compiled with read-only support, "
"can't be mounted as read-write\n");
- mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return -EINVAL;
#else
@@ -1345,13 +1339,11 @@ static int ufs_remount (struct super_blo
ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
printk("this ufstype is read-only supported\n");
- mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return -EINVAL;
}
if (!ufs_read_cylinder_structures(sb)) {
printk("failed during remounting\n");
- mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return -EPERM;
}
@@ -1359,7 +1351,6 @@ static int ufs_remount (struct super_blo
#endif
}
UFS_SB(sb)->s_mount_opt = new_mount_opt;
- mutex_unlock(&UFS_SB(sb)->s_lock);
unlock_ufs(sb);
return 0;
}
diff -puN fs/ufs/ufs.h~ufs-sb-mutex-merge-mutex_destroy fs/ufs/ufs.h
--- a/fs/ufs/ufs.h~ufs-sb-mutex-merge-mutex_destroy
+++ a/fs/ufs/ufs.h
@@ -24,7 +24,6 @@ struct ufs_sb_info {
int work_queued; /* non-zero if the delayed work is queued */
struct delayed_work sync_work; /* FS sync delayed work */
spinlock_t work_lock; /* protects sync_work and work_queued */
- struct mutex s_lock;
};
struct ufs_inode_info {
_
Patches currently in -mm which might be from fabf@xxxxxxxxx are
drivers-block-kconfig-update-ram-block-device-module-name.patch
ufs-sb-mutex-merge-mutex_destroy.patch
documentation-blockdev-ramdisktxt-updates.patch
documentation-filesystems-00-index-updates.patch
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