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authorDavid Howells <dhowells@redhat.com>2008-02-07 00:15:32 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 08:42:27 -0800
commite33ab086ae227a34e34b17e86dbb9d2dbaebb489 (patch)
tree02d5d6d90b0aad2032085bbdba07e69edbe9378f /fs/bfs
parent96eb5419412fbc7f39fa45d987034c5d0e6e1202 (diff)
downloadlinux-e33ab086ae227a34e34b17e86dbb9d2dbaebb489.tar.gz
iget: stop BFS from using iget() and read_inode()
Stop the BFS filesystem from using iget() and read_inode(). Replace bfs_read_inode() with bfs_iget(), and call that instead of iget(). bfs_iget() then uses iget_locked() directly and returns a proper error code instead of an inode in the event of an error. bfs_fill_super() returns any error incurred when getting the root inode instead of EINVAL. [kamalesh@linux.vnet.ibm.com: build fix] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/bfs')
-rw-r--r--fs/bfs/bfs.h2
-rw-r--r--fs/bfs/dir.c6
-rw-r--r--fs/bfs/inode.c32
3 files changed, 27 insertions, 13 deletions
diff --git a/fs/bfs/bfs.h b/fs/bfs/bfs.h
index ac7a8b1d6c3..71faf4d2390 100644
--- a/fs/bfs/bfs.h
+++ b/fs/bfs/bfs.h
@@ -44,6 +44,8 @@ static inline struct bfs_inode_info *BFS_I(struct inode *inode)
#define printf(format, args...) \
printk(KERN_ERR "BFS-fs: %s(): " format, __FUNCTION__, ## args)
+/* inode.c */
+extern struct inode *bfs_iget(struct super_block *sb, unsigned long ino);
/* file.c */
extern const struct inode_operations bfs_file_inops;
diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c
index 1fd056d0fc3..034950cb3cb 100644
--- a/fs/bfs/dir.c
+++ b/fs/bfs/dir.c
@@ -148,10 +148,10 @@ static struct dentry *bfs_lookup(struct inode *dir, struct dentry *dentry,
if (bh) {
unsigned long ino = (unsigned long)le16_to_cpu(de->ino);
brelse(bh);
- inode = iget(dir->i_sb, ino);
- if (!inode) {
+ inode = bfs_iget(dir->i_sb, ino);
+ if (IS_ERR(inode)) {
unlock_kernel();
- return ERR_PTR(-EACCES);
+ return ERR_CAST(inode);
}
}
unlock_kernel();
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index a64a71d444f..8db623838b5 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -32,17 +32,22 @@ MODULE_LICENSE("GPL");
void dump_imap(const char *prefix, struct super_block *s);
-static void bfs_read_inode(struct inode *inode)
+struct inode *bfs_iget(struct super_block *sb, unsigned long ino)
{
- unsigned long ino = inode->i_ino;
struct bfs_inode *di;
+ struct inode *inode;
struct buffer_head *bh;
int block, off;
+ inode = iget_locked(sb, ino);
+ if (IS_ERR(inode))
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
+
if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(inode->i_sb)->si_lasti)) {
printf("Bad inode number %s:%08lx\n", inode->i_sb->s_id, ino);
- make_bad_inode(inode);
- return;
+ goto error;
}
block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1;
@@ -50,8 +55,7 @@ static void bfs_read_inode(struct inode *inode)
if (!bh) {
printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id,
ino);
- make_bad_inode(inode);
- return;
+ goto error;
}
off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK;
@@ -85,6 +89,12 @@ static void bfs_read_inode(struct inode *inode)
inode->i_ctime.tv_nsec = 0;
brelse(bh);
+ unlock_new_inode(inode);
+ return inode;
+
+error:
+ iget_failed(inode);
+ return ERR_PTR(-EIO);
}
static int bfs_write_inode(struct inode *inode, int unused)
@@ -276,7 +286,6 @@ static void destroy_inodecache(void)
static const struct super_operations bfs_sops = {
.alloc_inode = bfs_alloc_inode,
.destroy_inode = bfs_destroy_inode,
- .read_inode = bfs_read_inode,
.write_inode = bfs_write_inode,
.delete_inode = bfs_delete_inode,
.put_super = bfs_put_super,
@@ -312,6 +321,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
struct inode *inode;
unsigned i, imap_len;
struct bfs_sb_info *info;
+ long ret = -EINVAL;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
@@ -346,14 +356,16 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
set_bit(i, info->si_imap);
s->s_op = &bfs_sops;
- inode = iget(s, BFS_ROOT_INO);
- if (!inode) {
+ inode = bfs_iget(s, BFS_ROOT_INO);
+ if (IS_ERR(inode)) {
+ ret = PTR_ERR(inode);
kfree(info->si_imap);
goto out;
}
s->s_root = d_alloc_root(inode);
if (!s->s_root) {
iput(inode);
+ ret = -ENOMEM;
kfree(info->si_imap);
goto out;
}
@@ -404,7 +416,7 @@ out:
brelse(bh);
kfree(info);
s->s_fs_info = NULL;
- return -EINVAL;
+ return ret;
}
static int bfs_get_sb(struct file_system_type *fs_type,