ufs: sb mutex merge + mutex_destroy
Commit788257d610("ufs: remove the BKL") replaced BKL with mutex protection using functions lock_ufs, unlock_ufs and struct mutex 'mutex' in sb_info. Commitb6963327e0("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. [akpm@linux-foundation.org: avoid ifdefs, return -EROFS not -EINVAL] Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Evgeniy Dushistov <dushistov@mail.ru> Cc: "Chen, Jet" <jet.chen@intel.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Fabian Frederick
Linus Torvalds
Родитель
0d2b7ea928
Коммит
0244756edc
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@ -52,7 +52,7 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
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if (ufs_fragnum(fragment) + count > uspi->s_fpg)
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ufs_error (sb, "ufs_free_fragments", "internal error");
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mutex_lock(&UFS_SB(sb)->s_lock);
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lock_ufs(sb);
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cgno = ufs_dtog(uspi, fragment);
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bit = ufs_dtogd(uspi, fragment);
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@ -116,12 +116,12 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
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ubh_sync_block(UCPI_UBH(ucpi));
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ufs_mark_sb_dirty(sb);
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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UFSD("EXIT\n");
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return;
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failed:
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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UFSD("EXIT (FAILED)\n");
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return;
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}
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@ -151,7 +151,7 @@ void ufs_free_blocks(struct inode *inode, u64 fragment, unsigned count)
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goto failed;
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}
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mutex_lock(&UFS_SB(sb)->s_lock);
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lock_ufs(sb);
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do_more:
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overflow = 0;
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@ -211,12 +211,12 @@ do_more:
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}
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ufs_mark_sb_dirty(sb);
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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UFSD("EXIT\n");
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return;
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failed_unlock:
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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failed:
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UFSD("EXIT (FAILED)\n");
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return;
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@ -357,7 +357,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
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usb1 = ubh_get_usb_first(uspi);
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*err = -ENOSPC;
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mutex_lock(&UFS_SB(sb)->s_lock);
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lock_ufs(sb);
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tmp = ufs_data_ptr_to_cpu(sb, p);
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if (count + ufs_fragnum(fragment) > uspi->s_fpb) {
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@ -378,19 +378,19 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
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"fragment %llu, tmp %llu\n",
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(unsigned long long)fragment,
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(unsigned long long)tmp);
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return INVBLOCK;
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}
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if (fragment < UFS_I(inode)->i_lastfrag) {
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UFSD("EXIT (ALREADY ALLOCATED)\n");
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return 0;
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}
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}
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else {
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if (tmp) {
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UFSD("EXIT (ALREADY ALLOCATED)\n");
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return 0;
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}
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}
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@ -399,7 +399,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
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* There is not enough space for user on the device
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*/
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if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(uspi, UFS_MINFREE) <= 0) {
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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UFSD("EXIT (FAILED)\n");
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return 0;
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}
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@ -424,7 +424,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
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ufs_clear_frags(inode, result + oldcount,
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newcount - oldcount, locked_page != NULL);
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}
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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UFSD("EXIT, result %llu\n", (unsigned long long)result);
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return result;
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}
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@ -439,7 +439,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
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fragment + count);
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ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
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locked_page != NULL);
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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UFSD("EXIT, result %llu\n", (unsigned long long)result);
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return result;
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}
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@ -477,7 +477,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
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*err = 0;
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UFS_I(inode)->i_lastfrag = max(UFS_I(inode)->i_lastfrag,
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fragment + count);
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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if (newcount < request)
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ufs_free_fragments (inode, result + newcount, request - newcount);
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ufs_free_fragments (inode, tmp, oldcount);
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@ -485,7 +485,7 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
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return result;
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}
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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UFSD("EXIT (FAILED)\n");
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return 0;
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}
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@ -69,11 +69,11 @@ void ufs_free_inode (struct inode * inode)
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ino = inode->i_ino;
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mutex_lock(&UFS_SB(sb)->s_lock);
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lock_ufs(sb);
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if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) {
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ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino);
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return;
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}
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@ -81,7 +81,7 @@ void ufs_free_inode (struct inode * inode)
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bit = ufs_inotocgoff (ino);
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ucpi = ufs_load_cylinder (sb, cg);
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if (!ucpi) {
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return;
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}
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ucg = ubh_get_ucg(UCPI_UBH(ucpi));
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@ -115,7 +115,7 @@ void ufs_free_inode (struct inode * inode)
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ubh_sync_block(UCPI_UBH(ucpi));
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ufs_mark_sb_dirty(sb);
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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UFSD("EXIT\n");
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}
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@ -193,7 +193,7 @@ struct inode *ufs_new_inode(struct inode *dir, umode_t mode)
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sbi = UFS_SB(sb);
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uspi = sbi->s_uspi;
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mutex_lock(&sbi->s_lock);
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lock_ufs(sb);
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/*
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* Try to place the inode in its parent directory
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@ -328,21 +328,20 @@ cg_found:
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sync_dirty_buffer(bh);
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brelse(bh);
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}
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mutex_unlock(&sbi->s_lock);
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unlock_ufs(sb);
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UFSD("allocating inode %lu\n", inode->i_ino);
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UFSD("EXIT\n");
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return inode;
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fail_remove_inode:
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mutex_unlock(&sbi->s_lock);
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unlock_ufs(sb);
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clear_nlink(inode);
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iput(inode);
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UFSD("EXIT (FAILED): err %d\n", err);
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return ERR_PTR(err);
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failed:
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mutex_unlock(&sbi->s_lock);
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unlock_ufs(sb);
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make_bad_inode(inode);
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iput (inode);
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UFSD("EXIT (FAILED): err %d\n", err);
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@ -697,7 +697,6 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
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unsigned flags;
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lock_ufs(sb);
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mutex_lock(&UFS_SB(sb)->s_lock);
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UFSD("ENTER\n");
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@ -715,7 +714,6 @@ static int ufs_sync_fs(struct super_block *sb, int wait)
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ufs_put_cstotal(sb);
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UFSD("EXIT\n");
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return 0;
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@ -760,6 +758,7 @@ static void ufs_put_super(struct super_block *sb)
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ubh_brelse_uspi (sbi->s_uspi);
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kfree (sbi->s_uspi);
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mutex_destroy(&sbi->mutex);
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kfree (sbi);
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sb->s_fs_info = NULL;
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UFSD("EXIT\n");
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@ -786,6 +785,14 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
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flags = 0;
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UFSD("ENTER\n");
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#ifndef CONFIG_UFS_FS_WRITE
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if (!(sb->s_flags & MS_RDONLY)) {
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printk("ufs was compiled with read-only support, "
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"can't be mounted as read-write\n");
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return -EROFS;
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}
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#endif
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sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
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if (!sbi)
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@ -795,15 +802,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
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UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
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#ifndef CONFIG_UFS_FS_WRITE
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if (!(sb->s_flags & MS_RDONLY)) {
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printk("ufs was compiled with read-only support, "
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"can't be mounted as read-write\n");
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goto failed;
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}
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#endif
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mutex_init(&sbi->mutex);
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mutex_init(&sbi->s_lock);
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spin_lock_init(&sbi->work_lock);
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INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
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/*
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@ -1257,6 +1256,7 @@ magic_found:
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return 0;
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failed:
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mutex_destroy(&sbi->mutex);
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if (ubh)
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ubh_brelse_uspi (uspi);
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kfree (uspi);
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@ -1280,7 +1280,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
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sync_filesystem(sb);
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lock_ufs(sb);
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mutex_lock(&UFS_SB(sb)->s_lock);
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uspi = UFS_SB(sb)->s_uspi;
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flags = UFS_SB(sb)->s_flags;
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usb1 = ubh_get_usb_first(uspi);
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@ -1294,7 +1293,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
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new_mount_opt = 0;
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ufs_set_opt (new_mount_opt, ONERROR_LOCK);
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if (!ufs_parse_options (data, &new_mount_opt)) {
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return -EINVAL;
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}
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@ -1302,14 +1300,12 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
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new_mount_opt |= ufstype;
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} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
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printk("ufstype can't be changed during remount\n");
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return -EINVAL;
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}
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if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
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UFS_SB(sb)->s_mount_opt = new_mount_opt;
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return 0;
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}
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@ -1334,7 +1330,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
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#ifndef CONFIG_UFS_FS_WRITE
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printk("ufs was compiled with read-only support, "
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"can't be mounted as read-write\n");
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return -EINVAL;
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#else
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@ -1344,13 +1339,11 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
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ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
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ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
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printk("this ufstype is read-only supported\n");
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return -EINVAL;
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}
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if (!ufs_read_cylinder_structures(sb)) {
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printk("failed during remounting\n");
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return -EPERM;
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}
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@ -1358,7 +1351,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
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#endif
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}
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UFS_SB(sb)->s_mount_opt = new_mount_opt;
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mutex_unlock(&UFS_SB(sb)->s_lock);
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unlock_ufs(sb);
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return 0;
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}
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@ -24,7 +24,6 @@ struct ufs_sb_info {
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int work_queued; /* non-zero if the delayed work is queued */
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struct delayed_work sync_work; /* FS sync delayed work */
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spinlock_t work_lock; /* protects sync_work and work_queued */
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struct mutex s_lock;
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};
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struct ufs_inode_info {
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