From db71922217a214e5c9268448e537b54fc1f301ea Mon Sep 17 00:00:00 2001 From: Jan Blunck Date: Sun, 15 Aug 2010 22:51:10 +0200 Subject: [PATCH] BKL: Explicitly add BKL around get_sb/fill_super This patch is a preparation necessary to remove the BKL from do_new_mount(). It explicitly adds calls to lock_kernel()/unlock_kernel() around get_sb/fill_super operations for filesystems that still uses the BKL. I've read through all the code formerly covered by the BKL inside do_kern_mount() and have satisfied myself that it doesn't need the BKL any more. do_kern_mount() is already called without the BKL when mounting the rootfs and in nfsctl. do_kern_mount() calls vfs_kern_mount(), which is called from various places without BKL: simple_pin_fs(), nfs_do_clone_mount() through nfs_follow_mountpoint(), afs_mntpt_do_automount() through afs_mntpt_follow_link(). Both later functions are actually the filesystems follow_link inode operation. vfs_kern_mount() is calling the specified get_sb function and lets the filesystem do its job by calling the given fill_super function. Therefore I think it is safe to push down the BKL from the VFS to the low-level filesystems get_sb/fill_super operation. [arnd: do not add the BKL to those file systems that already don't use it elsewhere] Signed-off-by: Jan Blunck Signed-off-by: Arnd Bergmann Cc: Matthew Wilcox Cc: Christoph Hellwig --- fs/adfs/super.c | 8 +++++++- fs/affs/super.c | 9 ++++++++- fs/afs/super.c | 5 +++++ fs/bfs/inode.c | 8 +++++++- fs/cifs/cifsfs.c | 12 ++++++++++-- fs/coda/inode.c | 8 +++++++- fs/ecryptfs/main.c | 4 ++++ fs/ext2/super.c | 10 ++++++++-- fs/ext3/super.c | 9 ++++++++- fs/ext4/super.c | 8 ++++++-- fs/fat/namei_msdos.c | 7 ++++++- fs/fat/namei_vfat.c | 7 ++++++- fs/freevxfs/vxfs_super.c | 7 ++++++- fs/hfs/super.c | 8 +++++++- fs/hpfs/super.c | 8 +++++++- fs/isofs/inode.c | 8 +++++++- fs/jffs2/super.c | 11 +++++++++-- fs/jfs/super.c | 12 ++++++++++-- fs/nilfs2/super.c | 8 +++++++- fs/ntfs/super.c | 5 +++++ fs/ocfs2/dlmfs/dlmfs.c | 9 ++++++++- fs/ocfs2/super.c | 5 +++++ fs/qnx4/inode.c | 8 +++++++- fs/smbfs/inode.c | 5 +++++ fs/squashfs/super.c | 6 ++++++ fs/udf/super.c | 8 +++++++- fs/ufs/super.c | 5 +++++ kernel/cgroup.c | 4 ++++ 28 files changed, 187 insertions(+), 25 deletions(-) diff --git a/fs/adfs/super.c b/fs/adfs/super.c index 4a3af7075c1d..d9803f73236f 100644 --- a/fs/adfs/super.c +++ b/fs/adfs/super.c @@ -352,11 +352,15 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent) struct adfs_sb_info *asb; struct inode *root; + lock_kernel(); + sb->s_flags |= MS_NODIRATIME; asb = kzalloc(sizeof(*asb), GFP_KERNEL); - if (!asb) + if (!asb) { + unlock_kernel(); return -ENOMEM; + } sb->s_fs_info = asb; /* set default options */ @@ -474,6 +478,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent) goto error; } else sb->s_root->d_op = &adfs_dentry_operations; + unlock_kernel(); return 0; error_free_bh: @@ -481,6 +486,7 @@ error_free_bh: error: sb->s_fs_info = NULL; kfree(asb); + unlock_kernel(); return -EINVAL; } diff --git a/fs/affs/super.c b/fs/affs/super.c index 33c4e7eef470..3a6d1dee4a51 100644 --- a/fs/affs/super.c +++ b/fs/affs/super.c @@ -291,6 +291,8 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent) u8 sig[4]; int ret = -EINVAL; + lock_kernel(); + save_mount_options(sb, data); pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options"); @@ -300,8 +302,10 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent) sb->s_flags |= MS_NODIRATIME; sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL); - if (!sbi) + if (!sbi) { + unlock_kernel(); return -ENOMEM; + } sb->s_fs_info = sbi; mutex_init(&sbi->s_bmlock); spin_lock_init(&sbi->symlink_lock); @@ -312,6 +316,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent) printk(KERN_ERR "AFFS: Error parsing options\n"); kfree(sbi->s_prefix); kfree(sbi); + unlock_kernel(); return -EINVAL; } /* N.B. after this point s_prefix must be released */ @@ -482,6 +487,7 @@ got_root: sb->s_root->d_op = &affs_dentry_operations; pr_debug("AFFS: s_flags=%lX\n",sb->s_flags); + unlock_kernel(); return 0; /* @@ -496,6 +502,7 @@ out_error_noinode: kfree(sbi->s_prefix); kfree(sbi); sb->s_fs_info = NULL; + unlock_kernel(); return ret; } diff --git a/fs/afs/super.c b/fs/afs/super.c index 77e1e5a61154..6c2fef44d385 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -302,12 +302,15 @@ static int afs_fill_super(struct super_block *sb, void *data) struct inode *inode = NULL; int ret; + lock_kernel(); + _enter(""); /* allocate a superblock info record */ as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL); if (!as) { _leave(" = -ENOMEM"); + unlock_kernel(); return -ENOMEM; } @@ -341,6 +344,7 @@ static int afs_fill_super(struct super_block *sb, void *data) sb->s_root = root; _leave(" = 0"); + unlock_kernel(); return 0; error_inode: @@ -354,6 +358,7 @@ error: sb->s_fs_info = NULL; _leave(" = %d", ret); + unlock_kernel(); return ret; } diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c index c4daf0f5fc02..d2e09363dd93 100644 --- a/fs/bfs/inode.c +++ b/fs/bfs/inode.c @@ -322,9 +322,13 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent) int ret = -EINVAL; unsigned long i_sblock, i_eblock, i_eoff, s_size; + lock_kernel(); + info = kzalloc(sizeof(*info), GFP_KERNEL); - if (!info) + if (!info) { + unlock_kernel(); return -ENOMEM; + } mutex_init(&info->bfs_lock); s->s_fs_info = info; @@ -439,6 +443,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent) brelse(bh); brelse(sbh); dump_imap("read_super", s); + unlock_kernel(); return 0; out3: @@ -452,6 +457,7 @@ out: mutex_destroy(&info->bfs_lock); kfree(info); s->s_fs_info = NULL; + unlock_kernel(); return ret; } diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index b7431afdd76d..070bf1aecd2d 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -514,22 +514,30 @@ cifs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data, struct vfsmount *mnt) { int rc; - struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); + struct super_block *sb; + + lock_kernel(); + + sb = sget(fs_type, NULL, set_anon_super, NULL); cFYI(1, "Devname: %s flags: %d ", dev_name, flags); - if (IS_ERR(sb)) + if (IS_ERR(sb)) { + unlock_kernel(); return PTR_ERR(sb); + } sb->s_flags = flags; rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); if (rc) { deactivate_locked_super(sb); + unlock_kernel(); return rc; } sb->s_flags |= MS_ACTIVE; simple_set_mnt(mnt, sb); + unlock_kernel(); return 0; } diff --git a/fs/coda/inode.c b/fs/coda/inode.c index 6526e6f21ecf..bfe8179b1295 100644 --- a/fs/coda/inode.c +++ b/fs/coda/inode.c @@ -148,6 +148,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent) int error; int idx; + lock_kernel(); + idx = get_device_index((struct coda_mount_data *) data); /* Ignore errors in data, for backward compatibility */ @@ -159,11 +161,13 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent) vc = &coda_comms[idx]; if (!vc->vc_inuse) { printk("coda_read_super: No pseudo device\n"); + unlock_kernel(); return -EINVAL; } if ( vc->vc_sb ) { printk("coda_read_super: Device already mounted\n"); + unlock_kernel(); return -EBUSY; } @@ -202,7 +206,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent) sb->s_root = d_alloc_root(root); if (!sb->s_root) goto error; - return 0; + unlock_kernel(); + return 0; error: bdi_destroy(&vc->bdi); @@ -212,6 +217,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent) if (vc) vc->vc_sb = NULL; + unlock_kernel(); return -EINVAL; } diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index cbd4e18adb20..c4af92fa12c3 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -36,6 +36,7 @@ #include #include #include +#include /* For lock_kernel() */ #include "ecryptfs_kernel.h" /** @@ -550,6 +551,7 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags, const char *err = "Getting sb failed"; int rc; + lock_kernel(); sbi = kmem_cache_zalloc(ecryptfs_sb_info_cache, GFP_KERNEL); if (!sbi) { rc = -ENOMEM; @@ -608,6 +610,7 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags, goto out; } simple_set_mnt(mnt, s); + unlock_kernel(); return 0; out: @@ -616,6 +619,7 @@ out: kmem_cache_free(ecryptfs_sb_info_cache, sbi); } printk(KERN_ERR "%s; rc = [%d]\n", err, rc); + unlock_kernel(); return rc; } diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 1ec602673ea8..f98c390caf1d 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -747,15 +747,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) __le32 features; int err; + lock_kernel(); + + err = -ENOMEM; sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) - return -ENOMEM; + goto failed_unlock; sbi->s_blockgroup_lock = kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); if (!sbi->s_blockgroup_lock) { kfree(sbi); - return -ENOMEM; + goto failed_unlock; } sb->s_fs_info = sbi; sbi->s_sb_block = sb_block; @@ -1083,6 +1086,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) if (ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY)) sb->s_flags |= MS_RDONLY; ext2_write_super(sb); + unlock_kernel(); return 0; cantfind_ext2: @@ -1107,6 +1111,8 @@ failed_sbi: sb->s_fs_info = NULL; kfree(sbi->s_blockgroup_lock); kfree(sbi); +failed_unlock: + unlock_kernel(); return ret; } diff --git a/fs/ext3/super.c b/fs/ext3/super.c index 5dbf4dba03c4..41f9dcd73e97 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -1611,14 +1611,19 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent) __le32 features; int err; + lock_kernel(); + sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); - if (!sbi) + if (!sbi) { + unlock_kernel(); return -ENOMEM; + } sbi->s_blockgroup_lock = kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); if (!sbi->s_blockgroup_lock) { kfree(sbi); + unlock_kernel(); return -ENOMEM; } sb->s_fs_info = sbi; @@ -2026,6 +2031,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent) "writeback"); lock_kernel(); + unlock_kernel(); return 0; cantfind_ext3: @@ -2056,6 +2062,7 @@ out_fail: kfree(sbi->s_blockgroup_lock); kfree(sbi); lock_kernel(); + unlock_kernel(); return ret; } diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 26147746c272..0f0021f4990c 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2568,6 +2568,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) int err; unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; + lock_kernel(); + sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) goto out_free_orig; @@ -3166,7 +3168,6 @@ no_journal: if (es->s_error_count) mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ - lock_kernel(); kfree(orig_data); return 0; @@ -3213,8 +3214,11 @@ out_fail: sb->s_fs_info = NULL; kfree(sbi->s_blockgroup_lock); kfree(sbi); - lock_kernel(); + kfree(orig_data); + return ret; + out_free_orig: + unlock_kernel(); kfree(orig_data); return ret; } diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c index bbc94ae4fd77..e2b0b978340d 100644 --- a/fs/fat/namei_msdos.c +++ b/fs/fat/namei_msdos.c @@ -9,6 +9,7 @@ #include #include #include +#include /* For lock_kernel() */ #include "fat.h" /* Characters that are undesirable in an MS-DOS file name */ @@ -662,12 +663,16 @@ static int msdos_fill_super(struct super_block *sb, void *data, int silent) { int res; + lock_kernel(); res = fat_fill_super(sb, data, silent, &msdos_dir_inode_operations, 0); - if (res) + if (res) { + unlock_kernel(); return res; + } sb->s_flags |= MS_NOATIME; sb->s_root->d_op = &msdos_dentry_operations; + unlock_kernel(); return 0; } diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index 6fcc7e71fbaa..9006ad9c7b11 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -21,6 +21,7 @@ #include #include #include +#include /* For lock_kernel() */ #include "fat.h" /* @@ -1055,15 +1056,19 @@ static int vfat_fill_super(struct super_block *sb, void *data, int silent) { int res; + lock_kernel(); res = fat_fill_super(sb, data, silent, &vfat_dir_inode_operations, 1); - if (res) + if (res) { + unlock_kernel(); return res; + } if (MSDOS_SB(sb)->options.name_check != 's') sb->s_root->d_op = &vfat_ci_dentry_ops; else sb->s_root->d_op = &vfat_dentry_ops; + unlock_kernel(); return 0; } diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c index dc0c041e85cb..eb2b9e09c996 100644 --- a/fs/freevxfs/vxfs_super.c +++ b/fs/freevxfs/vxfs_super.c @@ -148,7 +148,7 @@ static int vxfs_remount(struct super_block *sb, int *flags, char *data) * The superblock on success, else %NULL. * * Locking: - * We are under the bkl and @sbp->s_lock. + * We are under @sbp->s_lock. */ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent) { @@ -159,11 +159,14 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent) struct inode *root; int ret = -EINVAL; + lock_kernel(); + sbp->s_flags |= MS_RDONLY; infp = kzalloc(sizeof(*infp), GFP_KERNEL); if (!infp) { printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n"); + unlock_kernel(); return -ENOMEM; } @@ -236,6 +239,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent) goto out_free_ilist; } + unlock_kernel(); return 0; out_free_ilist: @@ -245,6 +249,7 @@ out_free_ilist: out: brelse(bp); kfree(infp); + unlock_kernel(); return ret; } diff --git a/fs/hfs/super.c b/fs/hfs/super.c index 34235d4bf08b..3069416fa8ef 100644 --- a/fs/hfs/super.c +++ b/fs/hfs/super.c @@ -382,9 +382,13 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent) struct inode *root_inode; int res; + lock_kernel(); + sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL); - if (!sbi) + if (!sbi) { + unlock_kernel(); return -ENOMEM; + } sb->s_fs_info = sbi; INIT_HLIST_HEAD(&sbi->rsrc_inodes); @@ -435,6 +439,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_root->d_op = &hfs_dentry_operations; /* everything's okay */ + unlock_kernel(); return 0; bail_iput: @@ -443,6 +448,7 @@ bail_no_root: printk(KERN_ERR "hfs: get root inode failed.\n"); bail: hfs_mdb_put(sb); + unlock_kernel(); return res; } diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c index 2607010be2fe..c969a1aa163a 100644 --- a/fs/hpfs/super.c +++ b/fs/hpfs/super.c @@ -477,11 +477,15 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent) int o; + lock_kernel(); + save_mount_options(s, options); sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); - if (!sbi) + if (!sbi) { + unlock_kernel(); return -ENOMEM; + } s->s_fs_info = sbi; sbi->sb_bmp_dir = NULL; @@ -666,6 +670,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent) root->i_blocks = 5; hpfs_brelse4(&qbh); } + unlock_kernel(); return 0; bail4: brelse(bh2); @@ -677,6 +682,7 @@ bail0: kfree(sbi->sb_cp_table); s->s_fs_info = NULL; kfree(sbi); + unlock_kernel(); return -EINVAL; } diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c index 5a44811b5027..05baf7721e8c 100644 --- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -571,11 +571,15 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent) int table, error = -EINVAL; unsigned int vol_desc_start; + lock_kernel(); + save_mount_options(s, data); sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); - if (!sbi) + if (!sbi) { + unlock_kernel(); return -ENOMEM; + } s->s_fs_info = sbi; if (!parse_options((char *)data, &opt)) @@ -900,6 +904,7 @@ root_found: kfree(opt.iocharset); + unlock_kernel(); return 0; /* @@ -939,6 +944,7 @@ out_freesbi: kfree(opt.iocharset); kfree(sbi); s->s_fs_info = NULL; + unlock_kernel(); return error; } diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c index 662bba099501..58dd9cf06206 100644 --- a/fs/jffs2/super.c +++ b/fs/jffs2/super.c @@ -146,14 +146,19 @@ static const struct super_operations jffs2_super_operations = static int jffs2_fill_super(struct super_block *sb, void *data, int silent) { struct jffs2_sb_info *c; + int ret; + + lock_kernel(); D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():" " New superblock for device %d (\"%s\")\n", sb->s_mtd->index, sb->s_mtd->name)); c = kzalloc(sizeof(*c), GFP_KERNEL); - if (!c) + if (!c) { + unlock_kernel(); return -ENOMEM; + } c->mtd = sb->s_mtd; c->os_priv = sb; @@ -175,7 +180,9 @@ static int jffs2_fill_super(struct super_block *sb, void *data, int silent) #ifdef CONFIG_JFFS2_FS_POSIX_ACL sb->s_flags |= MS_POSIXACL; #endif - return jffs2_do_fill_super(sb, data, silent); + ret = jffs2_do_fill_super(sb, data, silent); + unlock_kernel(); + return ret; } static int jffs2_get_sb(struct file_system_type *fs_type, diff --git a/fs/jfs/super.c b/fs/jfs/super.c index ec8c3e4baca3..eb31f677347d 100644 --- a/fs/jfs/super.c +++ b/fs/jfs/super.c @@ -438,14 +438,20 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) s64 newLVSize = 0; int flag, ret = -EINVAL; + lock_kernel(); + jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); - if (!new_valid_dev(sb->s_bdev->bd_dev)) + if (!new_valid_dev(sb->s_bdev->bd_dev)) { + unlock_kernel(); return -EOVERFLOW; + } sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); - if (!sbi) + if (!sbi) { + unlock_kernel(); return -ENOMEM; + } sb->s_fs_info = sbi; sbi->sb = sb; sbi->uid = sbi->gid = sbi->umask = -1; @@ -542,6 +548,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes); #endif sb->s_time_gran = 1; + unlock_kernel(); return 0; out_no_root: @@ -564,6 +571,7 @@ out_unload: unload_nls(sbi->nls_tab); out_kfree: kfree(sbi); + unlock_kernel(); return ret; } diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 922263393c76..0d573c2a6860 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -1113,9 +1113,12 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, if (!(flags & MS_RDONLY)) mode |= FMODE_WRITE; + lock_kernel(); sd.bdev = open_bdev_exclusive(dev_name, mode, fs_type); - if (IS_ERR(sd.bdev)) + if (IS_ERR(sd.bdev)) { + unlock_kernel(); return PTR_ERR(sd.bdev); + } /* * To get mount instance using sget() vfs-routine, NILFS needs @@ -1198,6 +1201,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, if (need_to_close) close_bdev_exclusive(sd.bdev, mode); simple_set_mnt(mnt, s); + unlock_kernel(); return 0; failed_unlock: @@ -1206,6 +1210,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, failed: close_bdev_exclusive(sd.bdev, mode); + unlock_kernel(); return err; cancel_new: @@ -1218,6 +1223,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, * We must finish all post-cleaning before this call; * put_nilfs() needs the block device. */ + unlock_kernel(); return err; } diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c index 512806171bfa..1f31e77fc41f 100644 --- a/fs/ntfs/super.c +++ b/fs/ntfs/super.c @@ -2732,6 +2732,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent) struct inode *tmp_ino; int blocksize, result; + lock_kernel(); + /* * We do a pretty difficult piece of bootstrap by reading the * MFT (and other metadata) from disk into memory. We'll only @@ -2755,6 +2757,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent) ntfs_error(sb, "Allocation of NTFS volume structure " "failed. Aborting mount..."); lockdep_on(); + unlock_kernel(); return -ENOMEM; } /* Initialize ntfs_volume structure. */ @@ -2942,6 +2945,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent) sb->s_export_op = &ntfs_export_ops; lock_kernel(); lockdep_on(); + unlock_kernel(); return 0; } ntfs_error(sb, "Failed to allocate root directory."); @@ -3062,6 +3066,7 @@ err_out_now: kfree(vol); ntfs_debug("Failed, returning -EINVAL."); lockdep_on(); + unlock_kernel(); return -EINVAL; } diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index c2903b84bb7a..667d7ceba8c9 100644 --- a/fs/ocfs2/dlmfs/dlmfs.c +++ b/fs/ocfs2/dlmfs/dlmfs.c @@ -44,6 +44,7 @@ #include #include #include +#include #include @@ -588,21 +589,27 @@ static int dlmfs_fill_super(struct super_block * sb, struct inode * inode; struct dentry * root; + lock_kernel(); + sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; sb->s_magic = DLMFS_MAGIC; sb->s_op = &dlmfs_ops; inode = dlmfs_get_root_inode(sb); - if (!inode) + if (!inode) { + unlock_kernel(); return -ENOMEM; + } root = d_alloc_root(inode); if (!root) { iput(inode); + unlock_kernel(); return -ENOMEM; } sb->s_root = root; + unlock_kernel(); return 0; } diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index fa1be1b304d1..b7e4f2d19d40 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -1002,6 +1002,8 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) char nodestr[8]; struct ocfs2_blockcheck_stats stats; + lock_kernel(); + mlog_entry("%p, %p, %i", sb, data, silent); if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) { @@ -1179,6 +1181,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) atomic_set(&osb->vol_state, VOLUME_DISABLED); wake_up(&osb->osb_mount_event); mlog_exit(status); + unlock_kernel(); return status; } } @@ -1193,6 +1196,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) ocfs2_orphan_scan_start(osb); mlog_exit(status); + unlock_kernel(); return status; read_super_error: @@ -1208,6 +1212,7 @@ read_super_error: } mlog_exit(status); + unlock_kernel(); return status; } diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c index 16829722be93..86a7be1399a8 100644 --- a/fs/qnx4/inode.c +++ b/fs/qnx4/inode.c @@ -234,9 +234,13 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent) struct qnx4_sb_info *qs; int ret = -EINVAL; + lock_kernel(); + qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL); - if (!qs) + if (!qs) { + unlock_kernel(); return -ENOMEM; + } s->s_fs_info = qs; sb_set_blocksize(s, QNX4_BLOCK_SIZE); @@ -284,6 +288,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent) brelse(bh); + unlock_kernel(); return 0; outi: @@ -293,6 +298,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent) outnobh: kfree(qs); s->s_fs_info = NULL; + unlock_kernel(); return ret; } diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c index 450c91941988..8fc5e50e142f 100644 --- a/fs/smbfs/inode.c +++ b/fs/smbfs/inode.c @@ -501,6 +501,8 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent) void *mem; static int warn_count; + lock_kernel(); + if (warn_count < 5) { warn_count++; printk(KERN_EMERG "smbfs is deprecated and will be removed" @@ -621,6 +623,7 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent) smb_new_dentry(sb->s_root); + unlock_kernel(); return 0; out_no_root: @@ -643,9 +646,11 @@ out_wrong_data: out_no_data: printk(KERN_ERR "smb_fill_super: missing data argument\n"); out_fail: + unlock_kernel(); return -EINVAL; out_no_server: printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n"); + unlock_kernel(); return -ENOMEM; } diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c index 88b4f8606652..ab1a401a0e19 100644 --- a/fs/squashfs/super.c +++ b/fs/squashfs/super.c @@ -87,11 +87,14 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent) u64 lookup_table_start, xattr_id_table_start; int err; + lock_kernel(); + TRACE("Entered squashfs_fill_superblock\n"); sb->s_fs_info = kzalloc(sizeof(*msblk), GFP_KERNEL); if (sb->s_fs_info == NULL) { ERROR("Failed to allocate squashfs_sb_info\n"); + unlock_kernel(); return -ENOMEM; } msblk = sb->s_fs_info; @@ -301,6 +304,7 @@ allocate_root: TRACE("Leaving squashfs_fill_super\n"); kfree(sblk); + unlock_kernel(); return 0; failed_mount: @@ -315,11 +319,13 @@ failed_mount: kfree(sb->s_fs_info); sb->s_fs_info = NULL; kfree(sblk); + unlock_kernel(); return err; failure: kfree(sb->s_fs_info); sb->s_fs_info = NULL; + unlock_kernel(); return -ENOMEM; } diff --git a/fs/udf/super.c b/fs/udf/super.c index 65412d84a45d..76f3d6d97b40 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -1880,6 +1880,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) struct kernel_lb_addr rootdir, fileset; struct udf_sb_info *sbi; + lock_kernel(); + uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); uopt.uid = -1; uopt.gid = -1; @@ -1888,8 +1890,10 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) uopt.dmode = UDF_INVALID_MODE; sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); - if (!sbi) + if (!sbi) { + unlock_kernel(); return -ENOMEM; + } sb->s_fs_info = sbi; @@ -2035,6 +2039,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) goto error_out; } sb->s_maxbytes = MAX_LFS_FILESIZE; + unlock_kernel(); return 0; error_out: @@ -2055,6 +2060,7 @@ error_out: kfree(sbi); sb->s_fs_info = NULL; + unlock_kernel(); return -EINVAL; } diff --git a/fs/ufs/super.c b/fs/ufs/super.c index d510c1b91817..6b9be90dae7d 100644 --- a/fs/ufs/super.c +++ b/fs/ufs/super.c @@ -696,6 +696,8 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent) unsigned maxsymlen; int ret = -EINVAL; + lock_kernel(); + uspi = NULL; ubh = NULL; flags = 0; @@ -1163,6 +1165,7 @@ magic_found: goto failed; UFSD("EXIT\n"); + unlock_kernel(); return 0; dalloc_failed: @@ -1174,10 +1177,12 @@ failed: kfree(sbi); sb->s_fs_info = NULL; UFSD("EXIT (FAILED)\n"); + unlock_kernel(); return ret; failed_nomem: UFSD("EXIT (NOMEM)\n"); + unlock_kernel(); return -ENOMEM; } diff --git a/kernel/cgroup.c b/kernel/cgroup.c index c9483d8f6140..a7ba3bccadc5 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -1430,6 +1430,8 @@ static int cgroup_get_sb(struct file_system_type *fs_type, struct super_block *sb; struct cgroupfs_root *new_root; + lock_kernel(); + /* First find the desired set of subsystems */ mutex_lock(&cgroup_mutex); ret = parse_cgroupfs_options(data, &opts); @@ -1559,6 +1561,7 @@ static int cgroup_get_sb(struct file_system_type *fs_type, simple_set_mnt(mnt, sb); kfree(opts.release_agent); kfree(opts.name); + unlock_kernel(); return 0; drop_new_super: @@ -1568,6 +1571,7 @@ static int cgroup_get_sb(struct file_system_type *fs_type, out_err: kfree(opts.release_agent); kfree(opts.name); + unlock_kernel(); return ret; } -- 2.34.1