[PATCH 28/32] IGET: Stop UFS from using iget() and read_inode() [try #2]

David Howells
2007-10-04T16:08:40Z

Stop the UFS filesystem from using iget() and read_inode(). Replace
ufs_read_inode() with ufs_iget(), and call that instead of iget().
ufs_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.

ufs_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.

Signed-off-by: David Howells <dhowells@redhat.com>
---

fs/ufs/inode.c | 34 ++++++++++++++++++++--------------
fs/ufs/namei.c | 6 +++---
fs/ufs/super.c | 14 +++++++++-----
include/linux/ufs_fs.h | 2 +-
4 files changed, 33 insertions(+), 23 deletions(-)

diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index f18b791..d7c2d3c 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -698,26 +698,30 @@ static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
return 0;
}

-void ufs_read_inode(struct inode * inode)
+struct inode *ufs_iget (struct super_block *sb, unsigned long ino)
{
- struct ufs_inode_info *ufsi = UFS_I(inode);
- struct super_block * sb;
- struct ufs_sb_private_info * uspi;
+ struct ufs_inode_info *ufsi;
+ struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
struct buffer_head * bh;
+ struct inode *inode;
int err;

- UFSD("ENTER, ino %lu\n", inode->i_ino);
-
- sb = inode->i_sb;
- uspi = UFS_SB(sb)->s_uspi;
+ UFSD("ENTER, ino %lu\n", ino);

- if (inode->i_ino < UFS_ROOTINO ||
- inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
+ if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
- inode->i_ino);
- goto bad_inode;
+ ino);
+ return ERR_PTR(-EIO);
}

+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
+
+ ufsi = UFS_I(inode);
+
bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
if (!bh) {
ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
@@ -749,10 +753,12 @@ void ufs_read_inode(struct inode * inode)
brelse(bh);

UFSD("EXIT\n");
- return;
+ unlock_new_inode(inode);
+ return inode;

bad_inode:
- make_bad_inode(inode);
+ iget_failed(inode);
+ return ERR_PTR(-EIO);
}

static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
index a059ccd..a00cec1 100644
--- a/fs/ufs/namei.c
+++ b/fs/ufs/namei.c
@@ -57,10 +57,10 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, stru
lock_kernel();
ino = ufs_inode_by_name(dir, dentry);
if (ino) {
- inode = iget(dir->i_sb, ino);
- if (!inode) {
+ inode = ufs_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/ufs/super.c b/fs/ufs/super.c
index 38eb0b7..8e157ab 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -613,6 +613,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
unsigned block_size, super_block_size;
unsigned flags;
unsigned super_block_offset;
+ int ret = -EINVAL;

uspi = NULL;
ubh = NULL;
@@ -1026,12 +1027,16 @@ magic_found:
uspi->s_maxsymlinklen =
fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);

- inode = iget(sb, UFS_ROOTINO);
- if (!inode || is_bad_inode(inode))
+ inode = ufs_iget(sb, UFS_ROOTINO);
+ if (IS_ERR(inode)) {
+ ret = PTR_ERR(inode);
goto failed;
+ }
sb->s_root = d_alloc_root(inode);
- if (!sb->s_root)
+ if (!sb->s_root) {
+ ret = -ENOMEM;
goto dalloc_failed;
+ }

ufs_setup_cstotal(sb);
/*
@@ -1053,7 +1058,7 @@ failed:
kfree(sbi);
sb->s_fs_info = NULL;
UFSD("EXIT (FAILED)\n");
- return -EINVAL;
+ return ret;

failed_nomem:
UFSD("EXIT (NOMEM)\n");
@@ -1264,7 +1269,6 @@ static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t,
static const struct super_operations ufs_super_ops = {
.alloc_inode = ufs_alloc_inode,
.destroy_inode = ufs_destroy_inode,
- .read_inode = ufs_read_inode,
.write_inode = ufs_write_inode,
.delete_inode = ufs_delete_inode,
.put_super = ufs_put_super,
diff --git a/include/linux/ufs_fs.h b/include/linux/ufs_fs.h
index daeba22..2a61fa3 100644
--- a/include/linux/ufs_fs.h
+++ b/include/linux/ufs_fs.h
@@ -979,7 +979,7 @@ extern void ufs_free_inode (struct inode *inode);
extern struct inode * ufs_new_inode (struct inode *, int);

/* inode.c */
-extern void ufs_read_inode (struct inode *);
+extern struct inode *ufs_iget (struct super_block *, unsigned long);
extern void ufs_put_inode (struct inode *);
extern int ufs_write_inode (struct inode *, int);
extern int ufs_sync_inode (struct inode *);