From: Marco Stornelli Subject: [PATCH 8/8] ufs: remove lock/unlock super Date: Thu, 16 Aug 2012 12:06:21 +0200 Message-ID: <502CC61D.40800@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit To: bharrosh@panasas.com, bhalevy@tonian.com, jack@suse.cz, Andrew Morton , adilger.kernel@dilger.ca, tytso@mit.edu, hirofumi@mail.parknet.co.jp, mikulas@artax.karlin.mff.cuni.cz, Al Viro , hch@infradead.org, dushistov@mail.ru, osd-dev@open-osd.org, Linux Kernel , linux-ext4@vger.kernel.org, Linux FS Devel Return-path: Received: from mail-we0-f174.google.com ([74.125.82.174]:38318 "EHLO mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752756Ab2HPKMt (ORCPT ); Thu, 16 Aug 2012 06:12:49 -0400 Sender: linux-ext4-owner@vger.kernel.org List-ID: From: Marco Stornelli Replaced lock and unlock super with a new fs mutex s_lock. Signed-off-by: Marco Stornelli --- diff -Nurp linux-3.6-rc1-orig/fs/ufs/balloc.c linux-3.6-rc1/fs/ufs/balloc.c --- linux-3.6-rc1-orig/fs/ufs/balloc.c 2012-08-16 09:37:36.000000000 +0200 +++ linux-3.6-rc1/fs/ufs/balloc.c 2012-08-16 10:25:31.000000000 +0200 @@ -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"); - lock_super(sb); + mutex_lock(&UFS_SB(sb)->s_lock); 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); - unlock_super (sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT\n"); return; failed: - unlock_super (sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT (FAILED)\n"); return; } @@ -155,7 +155,7 @@ void ufs_free_blocks(struct inode *inode goto failed; } - lock_super(sb); + mutex_lock(&UFS_SB(sb)->s_lock); do_more: overflow = 0; @@ -215,12 +215,12 @@ do_more: } ufs_mark_sb_dirty(sb); - unlock_super (sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT\n"); return; failed_unlock: - unlock_super (sb); + mutex_unlock(&UFS_SB(sb)->s_lock); 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; - lock_super (sb); + mutex_lock(&UFS_SB(sb)->s_lock); 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); - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); return INVBLOCK; } if (fragment < UFS_I(inode)->i_lastfrag) { UFSD("EXIT (ALREADY ALLOCATED)\n"); - unlock_super (sb); + mutex_unlock(&UFS_SB(sb)->s_lock); return 0; } } else { if (tmp) { UFSD("EXIT (ALREADY ALLOCATED)\n"); - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); 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) { - unlock_super (sb); + mutex_unlock(&UFS_SB(sb)->s_lock); 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); } - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); 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); - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); 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); - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); 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; } - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT (FAILED)\n"); return 0; } diff -Nurp linux-3.6-rc1-orig/fs/ufs/ialloc.c linux-3.6-rc1/fs/ufs/ialloc.c --- linux-3.6-rc1-orig/fs/ufs/ialloc.c 2012-08-16 09:37:36.000000000 +0200 +++ linux-3.6-rc1/fs/ufs/ialloc.c 2012-08-16 10:27:38.000000000 +0200 @@ -71,11 +71,11 @@ void ufs_free_inode (struct inode * inod ino = inode->i_ino; - lock_super (sb); + mutex_lock(&UFS_SB(sb)->s_lock); if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) { ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino); - unlock_super (sb); + mutex_unlock(&UFS_SB(sb)->s_lock); return; } @@ -83,7 +83,7 @@ void ufs_free_inode (struct inode * inod bit = ufs_inotocgoff (ino); ucpi = ufs_load_cylinder (sb, cg); if (!ucpi) { - unlock_super (sb); + mutex_unlock(&UFS_SB(sb)->s_lock); 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); - unlock_super (sb); + mutex_unlock(&UFS_SB(sb)->s_lock); UFSD("EXIT\n"); } @@ -197,7 +197,7 @@ struct inode *ufs_new_inode(struct inode uspi = sbi->s_uspi; usb1 = ubh_get_usb_first(uspi); - lock_super (sb); + mutex_lock(&sbi->s_lock); /* * Try to place the inode in its parent directory @@ -333,20 +333,20 @@ cg_found: brelse(bh); } - unlock_super (sb); + mutex_unlock(&sbi->s_lock); UFSD("allocating inode %lu\n", inode->i_ino); UFSD("EXIT\n"); return inode; fail_remove_inode: - unlock_super(sb); + mutex_unlock(&sbi->s_lock); clear_nlink(inode); iput(inode); UFSD("EXIT (FAILED): err %d\n", err); return ERR_PTR(err); failed: - unlock_super (sb); + mutex_unlock(&sbi->s_lock); make_bad_inode(inode); iput (inode); UFSD("EXIT (FAILED): err %d\n", err); diff -Nurp linux-3.6-rc1-orig/fs/ufs/super.c linux-3.6-rc1/fs/ufs/super.c --- linux-3.6-rc1-orig/fs/ufs/super.c 2012-08-16 09:37:36.000000000 +0200 +++ linux-3.6-rc1/fs/ufs/super.c 2012-08-16 11:18:38.000000000 +0200 @@ -699,7 +699,7 @@ static int ufs_sync_fs(struct super_bloc unsigned flags; lock_ufs(sb); - lock_super(sb); + mutex_lock(&UFS_SB(sb)->s_lock); UFSD("ENTER\n"); @@ -717,7 +717,7 @@ static int ufs_sync_fs(struct super_bloc ufs_put_cstotal(sb); UFSD("EXIT\n"); - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return 0; @@ -805,6 +805,7 @@ 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); /* @@ -1280,7 +1281,7 @@ static int ufs_remount (struct super_blo unsigned flags; lock_ufs(sb); - lock_super(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); @@ -1294,7 +1295,7 @@ 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)) { - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return -EINVAL; } @@ -1302,14 +1303,14 @@ 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"); - unlock_super(sb); + 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; - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return 0; } @@ -1334,7 +1335,7 @@ 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"); - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return -EINVAL; #else @@ -1344,13 +1345,13 @@ 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"); - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return -EINVAL; } if (!ufs_read_cylinder_structures(sb)) { printk("failed during remounting\n"); - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return -EPERM; } @@ -1358,7 +1359,7 @@ static int ufs_remount (struct super_blo #endif } UFS_SB(sb)->s_mount_opt = new_mount_opt; - unlock_super(sb); + mutex_unlock(&UFS_SB(sb)->s_lock); unlock_ufs(sb); return 0; } diff -Nurp linux-3.6-rc1-orig/fs/ufs/ufs.h linux-3.6-rc1/fs/ufs/ufs.h --- linux-3.6-rc1-orig/fs/ufs/ufs.h 2012-08-16 09:37:36.000000000 +0200 +++ linux-3.6-rc1/fs/ufs/ufs.h 2012-08-16 10:24:05.000000000 +0200 @@ -24,6 +24,7 @@ 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 {