Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / fs / ext2 / super.c

diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 2299325..6bd5bfd 100644 (file)
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -16,7 +16,6 @@
  *        David S. Miller (davem@caip.rutgers.edu), 1995
  */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/string.h>
 #include <linux/fs.h>
@@ -39,7 +38,7 @@
 static void ext2_sync_super(struct super_block *sb,
                            struct ext2_super_block *es);
 static int ext2_remount (struct super_block * sb, int * flags, char * data);
-static int ext2_statfs (struct super_block * sb, struct kstatfs * buf);
+static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf);
 
 void ext2_error (struct super_block * sb, const char * function,
                 const char * fmt, ...)
@@ -260,7 +259,7 @@ static struct dentry *ext2_get_dentry(struct super_block *sb, void *vobjp)
        struct inode *inode;
        struct dentry *result;
 
-       if (ino != EXT2_ROOT_INO && ino < EXT2_FIRST_INO(sb))
+       if (ino < EXT2_FIRST_INO(sb) && ino != EXT2_ROOT_INO)
                return ERR_PTR(-ESTALE);
        if (ino > le32_to_cpu(EXT2_SB(sb)->s_es->s_inodes_count))
                return ERR_PTR(-ESTALE);
@@ -273,9 +272,8 @@ static struct dentry *ext2_get_dentry(struct super_block *sb, void *vobjp)
        inode = iget(sb, ino);
        if (inode == NULL)
                return ERR_PTR(-ENOMEM);
-       if (is_bad_inode(inode)
-           || (generation && inode->i_generation != generation)
-               ) {
+       if (is_bad_inode(inode) ||
+           (generation && inode->i_generation != generation)) {
                /* we didn't find the right inode.. */
                iput(inode);
                return ERR_PTR(-ESTALE);
@@ -291,7 +289,6 @@ static struct dentry *ext2_get_dentry(struct super_block *sb, void *vobjp)
        return result;
 }
 
-
 /* Yes, most of these are left as NULL!!
  * A NULL value implies the default, which works with ext2-like file
  * systems, but can be improved upon.
@@ -825,7 +822,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
        if (EXT2_INODE_SIZE(sb) == 0)
                goto cantfind_ext2;
        sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb);
-       if (sbi->s_inodes_per_block == 0)
+       if (sbi->s_inodes_per_block == 0 || sbi->s_inodes_per_group == 0)
                goto cantfind_ext2;
        sbi->s_itb_per_group = sbi->s_inodes_per_group /
                                        sbi->s_inodes_per_block;
@@ -883,9 +880,6 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
                printk ("EXT2-fs: not enough memory\n");
                goto failed_mount;
        }
-       percpu_counter_init(&sbi->s_freeblocks_counter);
-       percpu_counter_init(&sbi->s_freeinodes_counter);
-       percpu_counter_init(&sbi->s_dirs_counter);
        bgl_lock_init(&sbi->s_blockgroup_lock);
        sbi->s_debts = kmalloc(sbi->s_groups_count * sizeof(*sbi->s_debts),
                               GFP_KERNEL);
@@ -906,12 +900,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
        }
        if (!ext2_check_descriptors (sb)) {
                printk ("EXT2-fs: group descriptors corrupted!\n");
-               db_count = i;
                goto failed_mount2;
        }
        sbi->s_gdb_count = db_count;
        get_random_bytes(&sbi->s_next_generation, sizeof(u32));
        spin_lock_init(&sbi->s_next_gen_lock);
+
+       percpu_counter_init(&sbi->s_freeblocks_counter,
+                               ext2_count_free_blocks(sb));
+       percpu_counter_init(&sbi->s_freeinodes_counter,
+                               ext2_count_free_inodes(sb));
+       percpu_counter_init(&sbi->s_dirs_counter,
+                               ext2_count_dirs(sb));
        /*
         * set up enough so that it can read an inode
         */
@@ -923,24 +923,18 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
        if (!sb->s_root) {
                iput(root);
                printk(KERN_ERR "EXT2-fs: get root inode failed\n");
-               goto failed_mount2;
+               goto failed_mount3;
        }
        if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
                dput(sb->s_root);
                sb->s_root = NULL;
                printk(KERN_ERR "EXT2-fs: corrupt root inode, run e2fsck\n");
-               goto failed_mount2;
+               goto failed_mount3;
        }
        if (EXT2_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL))
                ext2_warning(sb, __FUNCTION__,
                        "mounting ext3 filesystem as ext2");
        ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY);
-       percpu_counter_mod(&sbi->s_freeblocks_counter,
-                               ext2_count_free_blocks(sb));
-       percpu_counter_mod(&sbi->s_freeinodes_counter,
-                               ext2_count_free_inodes(sb));
-       percpu_counter_mod(&sbi->s_dirs_counter,
-                               ext2_count_dirs(sb));
        return 0;
 
 cantfind_ext2:
@@ -948,7 +942,10 @@ cantfind_ext2:
                printk("VFS: Can't find an ext2 filesystem on dev %s.\n",
                       sb->s_id);
        goto failed_mount;
-
+failed_mount3:
+       percpu_counter_destroy(&sbi->s_freeblocks_counter);
+       percpu_counter_destroy(&sbi->s_freeinodes_counter);
+       percpu_counter_destroy(&sbi->s_dirs_counter);
 failed_mount2:
        for (i = 0; i < db_count; i++)
                brelse(sbi->s_group_desc[i]);
@@ -1094,8 +1091,9 @@ restore_opts:
        return err;
 }
 
-static int ext2_statfs (struct super_block * sb, struct kstatfs * buf)
+static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
 {
+       struct super_block *sb = dentry->d_sb;
        struct ext2_sb_info *sbi = EXT2_SB(sb);
        unsigned long overhead;
        int i;
@@ -1143,10 +1141,10 @@ static int ext2_statfs (struct super_block * sb, struct kstatfs * buf)
        return 0;
 }
 
-static struct super_block *ext2_get_sb(struct file_system_type *fs_type,
-       int flags, const char *dev_name, void *data)
+static int ext2_get_sb(struct file_system_type *fs_type,
+       int flags, const char *dev_name, void *data, struct vfsmount *mnt)
 {
-       return get_sb_bdev(fs_type, flags, dev_name, data, ext2_fill_super);
+       return get_sb_bdev(fs_type, flags, dev_name, data, ext2_fill_super, mnt);
 }
 
 #ifdef CONFIG_QUOTA
@@ -1211,7 +1209,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
        struct buffer_head tmp_bh;
        struct buffer_head *bh;
 
-       mutex_lock(&inode->i_mutex);
+       mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
        while (towrite > 0) {
                tocopy = sb->s_blocksize - offset < towrite ?
                                sb->s_blocksize - offset : towrite;