nfsd4: make recall callback an asynchronous rpc

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

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 0da04e6..296785a 100644 (file)
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -64,7 +64,7 @@ static inline int __fat_get_block(struct inode *inode, sector_t iblock,
        sector_t phys;
        int err, offset;
 
-       err = fat_bmap(inode, iblock, &phys, &mapped_blocks);
+       err = fat_bmap(inode, iblock, &phys, &mapped_blocks, create);
        if (err)
                return err;
        if (phys) {
@@ -94,7 +94,7 @@ static inline int __fat_get_block(struct inode *inode, sector_t iblock,
        *max_blocks = min(mapped_blocks, *max_blocks);
        MSDOS_I(inode)->mmu_private += *max_blocks << sb->s_blocksize_bits;
 
-       err = fat_bmap(inode, iblock, &phys, &mapped_blocks);
+       err = fat_bmap(inode, iblock, &phys, &mapped_blocks, create);
        if (err)
                return err;
 
@@ -199,7 +199,14 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
 
 static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
 {
-       return generic_block_bmap(mapping, block, fat_get_block);
+       sector_t blocknr;
+
+       /* fat_get_cluster() assumes the requested blocknr isn't truncated. */
+       down_read(&mapping->host->i_alloc_sem);
+       blocknr = generic_block_bmap(mapping, block, fat_get_block);
+       up_read(&mapping->host->i_alloc_sem);
+
+       return blocknr;
 }
 
 static const struct address_space_operations fat_aops = {
@@ -516,7 +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) {
@@ -530,11 +539,27 @@ 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;
 }
 
+static inline loff_t fat_i_pos_read(struct msdos_sb_info *sbi,
+                                   struct inode *inode)
+{
+       loff_t i_pos;
+#if BITS_PER_LONG == 32
+       spin_lock(&sbi->inode_hash_lock);
+#endif
+       i_pos = MSDOS_I(inode)->i_pos;
+#if BITS_PER_LONG == 32
+       spin_unlock(&sbi->inode_hash_lock);
+#endif
+       return i_pos;
+}
+
 static int fat_write_inode(struct inode *inode, int wait)
 {
        struct super_block *sb = inode->i_sb;
@@ -544,9 +569,12 @@ static int fat_write_inode(struct inode *inode, int wait)
        loff_t i_pos;
        int err;
 
+       if (inode->i_ino == MSDOS_ROOT_INO)
+               return 0;
+
 retry:
-       i_pos = MSDOS_I(inode)->i_pos;
-       if (inode->i_ino == MSDOS_ROOT_INO || !i_pos)
+       i_pos = fat_i_pos_read(sbi, inode);
+       if (!i_pos)
                return 0;
 
        bh = sb_bread(sb, i_pos >> sbi->dir_per_block_bits);
@@ -725,6 +753,8 @@ static struct dentry *fat_get_parent(struct dentry *child)
        brelse(bh);
 
        parent = d_obtain_alias(inode);
+       if (!IS_ERR(parent))
+               parent->d_op = sb->s_root->d_op;
 out:
        unlock_super(sb);
 
@@ -902,9 +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;