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iget: stop QNX4 from using iget() and read_inode()

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Stop the QNX4 filesystem from using iget() and read_inode().  Replace
qnx4_read_inode() with qnx4_iget(), and call that instead of iget().
qnx4_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.

qnx4_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Anders Larsen <al@alarsen.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>
This commit is contained in:
David Howells 2008-02-07 00:15:45 -08:00 committed by Linus Torvalds
parent a1d4aebbfa
commit 2b7e5bcbd9
3 changed files with 38 additions and 18 deletions
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47
fs/qnx4/inode.c
View file

@ -125,7 +125,6 @@ static int qnx4_write_inode(struct inode *inode, int unused)
static void qnx4_put_super(struct super_block *sb);
static struct inode *qnx4_alloc_inode(struct super_block *sb);
static void qnx4_destroy_inode(struct inode *inode);
static void qnx4_read_inode(struct inode *);
static int qnx4_remount(struct super_block *sb, int *flags, char *data);
static int qnx4_statfs(struct dentry *, struct kstatfs *);
@ -133,7 +132,6 @@ static const struct super_operations qnx4_sops =
{
.alloc_inode = qnx4_alloc_inode,
.destroy_inode = qnx4_destroy_inode,
.read_inode = qnx4_read_inode,
.put_super = qnx4_put_super,
.statfs = qnx4_statfs,
.remount_fs = qnx4_remount,
@ -357,6 +355,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
struct inode *root;
const char *errmsg;
struct qnx4_sb_info *qs;
int ret = -EINVAL;
qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
if (!qs)
@ -396,12 +395,14 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
}
/* does root not have inode number QNX4_ROOT_INO ?? */
root = iget(s, QNX4_ROOT_INO * QNX4_INODES_PER_BLOCK);
if (!root) {
root = qnx4_iget(s, QNX4_ROOT_INO * QNX4_INODES_PER_BLOCK);
if (IS_ERR(root)) {
printk("qnx4: get inode failed\n");
ret = PTR_ERR(root);
goto out;
}
ret = -ENOMEM;
s->s_root = d_alloc_root(root);
if (s->s_root == NULL)
goto outi;
@ -417,7 +418,7 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
outnobh:
kfree(qs);
s->s_fs_info = NULL;
return -EINVAL;
return ret;
}
static void qnx4_put_super(struct super_block *sb)
@ -462,29 +463,38 @@ static const struct address_space_operations qnx4_aops = {
.bmap = qnx4_bmap
};
static void qnx4_read_inode(struct inode *inode)
struct inode *qnx4_iget(struct super_block *sb, unsigned long ino)
{
struct buffer_head *bh;
struct qnx4_inode_entry *raw_inode;
int block, ino;
struct super_block *sb = inode->i_sb;
struct qnx4_inode_entry *qnx4_inode = qnx4_raw_inode(inode);
int block;
struct qnx4_inode_entry *qnx4_inode;
struct inode *inode;
ino = inode->i_ino;
inode = iget_locked(sb, ino);
if (!inode)
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
return inode;
qnx4_inode = qnx4_raw_inode(inode);
inode->i_mode = 0;
QNX4DEBUG(("Reading inode : [%d]\n", ino));
if (!ino) {
printk("qnx4: bad inode number on dev %s: %d is out of range\n",
printk(KERN_ERR "qnx4: bad inode number on dev %s: %lu is "
"out of range\n",
sb->s_id, ino);
return;
iget_failed(inode);
return ERR_PTR(-EIO);
}
block = ino / QNX4_INODES_PER_BLOCK;
if (!(bh = sb_bread(sb, block))) {
printk("qnx4: major problem: unable to read inode from dev "
"%s\n", sb->s_id);
return;
iget_failed(inode);
return ERR_PTR(-EIO);
}
raw_inode = ((struct qnx4_inode_entry *) bh->b_data) +
(ino % QNX4_INODES_PER_BLOCK);
@ -515,9 +525,16 @@ static void qnx4_read_inode(struct inode *inode)
inode->i_op = &page_symlink_inode_operations;
inode->i_mapping->a_ops = &qnx4_aops;
qnx4_i(inode)->mmu_private = inode->i_size;
} else
printk("qnx4: bad inode %d on dev %s\n",ino,sb->s_id);
} else {
printk(KERN_ERR "qnx4: bad inode %lu on dev %s\n",
ino, sb->s_id);
iget_failed(inode);
brelse(bh);
return ERR_PTR(-EIO);
}
brelse(bh);
unlock_new_inode(inode);
return inode;
}
static struct kmem_cache *qnx4_inode_cachep;

8
fs/qnx4/namei.c
View file

@ -128,10 +128,12 @@ struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nam
}
brelse(bh);
if ((foundinode = iget(dir->i_sb, ino)) == NULL) {
foundinode = qnx4_iget(dir->i_sb, ino);
if (IS_ERR(foundinode)) {
unlock_kernel();
QNX4DEBUG(("qnx4: lookup->iget -> NULL\n"));
return ERR_PTR(-EACCES);
QNX4DEBUG(("qnx4: lookup->iget -> error %ld\n",
PTR_ERR(foundinode)));
return ERR_CAST(foundinode);
}
out:
unlock_kernel();

1
include/linux/qnx4_fs.h
View file

@ -110,6 +110,7 @@ struct qnx4_inode_info {
struct inode vfs_inode;
};
extern struct inode *qnx4_iget(struct super_block *, unsigned long);
extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
extern unsigned long qnx4_block_map(struct inode *inode, long iblock);