md: support bitmaps on RAID10 arrays larger then 2 terabytes

[safe/jmp/linux-2.6] / fs / fat / inode.c

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 37a8af1..296785a 100644 (file)
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -202,9 +202,9 @@ static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
        sector_t blocknr;
 
        /* fat_get_cluster() assumes the requested blocknr isn't truncated. */
-       mutex_lock(&mapping->host->i_mutex);
+       down_read(&mapping->host->i_alloc_sem);
        blocknr = generic_block_bmap(mapping, block, fat_get_block);
-       mutex_unlock(&mapping->host->i_mutex);
+       up_read(&mapping->host->i_alloc_sem);
 
        return blocknr;
 }
@@ -523,7 +523,9 @@ static int fat_remount(struct super_block *sb, int *flags, char *data)
 
 static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-       struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
+       struct super_block *sb = dentry->d_sb;
+       struct msdos_sb_info *sbi = MSDOS_SB(sb);
+       u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
 
        /* If the count of free cluster is still unknown, counts it here. */
        if (sbi->free_clusters == -1 || !sbi->free_clus_valid) {
@@ -537,6 +539,8 @@ static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
        buf->f_blocks = sbi->max_cluster - FAT_START_ENT;
        buf->f_bfree = sbi->free_clusters;
        buf->f_bavail = sbi->free_clusters;
+       buf->f_fsid.val[0] = (u32)id;
+       buf->f_fsid.val[1] = (u32)(id >> 32);
        buf->f_namelen = sbi->options.isvfat ? 260 : 12;
 
        return 0;
@@ -928,9 +932,9 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
 
        opts->isvfat = is_vfat;
 
-       opts->fs_uid = current->uid;
-       opts->fs_gid = current->gid;
-       opts->fs_fmask = opts->fs_dmask = current->fs->umask;
+       opts->fs_uid = current_uid();
+       opts->fs_gid = current_gid();
+       opts->fs_fmask = current_umask();
        opts->allow_utime = -1;
        opts->codepage = fat_default_codepage;
        opts->iocharset = fat_default_iocharset;