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author | David Howells <dhowells@redhat.com> | 2008-02-07 08:15:49 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 16:42:29 (GMT) |
commit | b88a27edcd3e96f826c291f8e34fdbb0a90bc9ca (patch) | |
tree | eaf898c54946e958f95a757fb43b1dcd124b2358 /fs | |
parent | b55c460da6df4e8dfc6f68c00fafe7337b54e2f8 (diff) | |
download | linux-b88a27edcd3e96f826c291f8e34fdbb0a90bc9ca.tar.xz |
iget: stop OPENPROMFS from using iget() and read_inode()
Stop the OPENPROMFS filesystem from using iget() and read_inode(). Replace
openpromfs_read_inode() with openpromfs_iget(), and call that instead of
iget(). openpromfs_iget() then uses iget_locked() directly and returns a
proper error code instead of an inode in the event of an error.
openpromfs_fill_super() returns any error incurred when getting the root inode
instead of ENOMEM (not that it currently incurs any other error).
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/openpromfs/inode.c | 45 |
1 files changed, 30 insertions, 15 deletions
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c index 6b7ff16..d17b4fd 100644 --- a/fs/openpromfs/inode.c +++ b/fs/openpromfs/inode.c @@ -38,6 +38,8 @@ struct op_inode_info { union op_inode_data u; }; +static struct inode *openprom_iget(struct super_block *sb, ino_t ino); + static inline struct op_inode_info *OP_I(struct inode *inode) { return container_of(inode, struct op_inode_info, vfs_inode); @@ -226,10 +228,10 @@ static struct dentry *openpromfs_lookup(struct inode *dir, struct dentry *dentry return ERR_PTR(-ENOENT); found: - inode = iget(dir->i_sb, ino); + inode = openprom_iget(dir->i_sb, ino); mutex_unlock(&op_mutex); - if (!inode) - return ERR_PTR(-EINVAL); + if (IS_ERR(inode)) + return ERR_CAST(inode); ent_oi = OP_I(inode); ent_oi->type = ent_type; ent_oi->u = ent_data; @@ -348,14 +350,23 @@ static void openprom_destroy_inode(struct inode *inode) kmem_cache_free(op_inode_cachep, OP_I(inode)); } -static void openprom_read_inode(struct inode * inode) +static struct inode *openprom_iget(struct super_block *sb, ino_t ino) { - inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; - if (inode->i_ino == OPENPROM_ROOT_INO) { - inode->i_op = &openprom_inode_operations; - inode->i_fop = &openprom_operations; - inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; + struct inode *inode; + + inode = iget_locked(sb, ino); + if (!inode) + return ERR_PTR(-ENOMEM); + if (inode->i_state & I_NEW) { + inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; + if (inode->i_ino == OPENPROM_ROOT_INO) { + inode->i_op = &openprom_inode_operations; + inode->i_fop = &openprom_operations; + inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; + } + unlock_new_inode(inode); } + return inode; } static int openprom_remount(struct super_block *sb, int *flags, char *data) @@ -367,7 +378,6 @@ static int openprom_remount(struct super_block *sb, int *flags, char *data) static const struct super_operations openprom_sops = { .alloc_inode = openprom_alloc_inode, .destroy_inode = openprom_destroy_inode, - .read_inode = openprom_read_inode, .statfs = simple_statfs, .remount_fs = openprom_remount, }; @@ -376,6 +386,7 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent) { struct inode *root_inode; struct op_inode_info *oi; + int ret; s->s_flags |= MS_NOATIME; s->s_blocksize = 1024; @@ -383,9 +394,11 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent) s->s_magic = OPENPROM_SUPER_MAGIC; s->s_op = &openprom_sops; s->s_time_gran = 1; - root_inode = iget(s, OPENPROM_ROOT_INO); - if (!root_inode) + root_inode = openprom_iget(s, OPENPROM_ROOT_INO); + if (IS_ERR(root_inode)) { + ret = PTR_ERR(root_inode); goto out_no_root; + } oi = OP_I(root_inode); oi->type = op_inode_node; @@ -393,13 +406,15 @@ static int openprom_fill_super(struct super_block *s, void *data, int silent) s->s_root = d_alloc_root(root_inode); if (!s->s_root) - goto out_no_root; + goto out_no_root_dentry; return 0; +out_no_root_dentry: + iput(root_inode); + ret = -ENOMEM; out_no_root: printk("openprom_fill_super: get root inode failed\n"); - iput(root_inode); - return -ENOMEM; + return ret; } static int openprom_get_sb(struct file_system_type *fs_type, |