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

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

romfs_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>
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 00:15:46 -08:00 committed by Linus Torvalds
parent 2b7e5bcbd9
commit 78cc912000
1 changed files with 32 additions and 14 deletions
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46
fs/romfs/inode.c
View File

@ -84,6 +84,8 @@ struct romfs_inode_info {
struct inode vfs_inode;
};
static struct inode *romfs_iget(struct super_block *, unsigned long);
/* instead of private superblock data */
static inline unsigned long romfs_maxsize(struct super_block *sb)
{
@ -117,7 +119,7 @@ static int romfs_fill_super(struct super_block *s, void *data, int silent)
struct buffer_head *bh;
struct romfs_super_block *rsb;
struct inode *root;
int sz;
int sz, ret = -EINVAL;
/* I would parse the options here, but there are none.. :) */
@ -157,10 +159,13 @@ static int romfs_fill_super(struct super_block *s, void *data, int silent)
& ROMFH_MASK;
s->s_op = &romfs_ops;
root = iget(s, sz);
if (!root)
root = romfs_iget(s, sz);
if (IS_ERR(root)) {
ret = PTR_ERR(root);
goto out;
}
ret = -ENOMEM;
s->s_root = d_alloc_root(root);
if (!s->s_root)
goto outiput;
@ -173,7 +178,7 @@ static int romfs_fill_super(struct super_block *s, void *data, int silent)
out:
brelse(bh);
outnobh:
return -EINVAL;
return ret;
}
/* That's simple too. */
@ -389,8 +394,11 @@ romfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
if ((be32_to_cpu(ri.next) & ROMFH_TYPE) == ROMFH_HRD)
offset = be32_to_cpu(ri.spec) & ROMFH_MASK;
if ((inode = iget(dir->i_sb, offset)))
goto outi;
inode = romfs_iget(dir->i_sb, offset);
if (IS_ERR(inode)) {
res = PTR_ERR(inode);
goto out;
}
/*
* it's a bit funky, _lookup needs to return an error code
@ -402,7 +410,7 @@ romfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
*/
out0: inode = NULL;
outi: res = 0;
res = 0;
d_add (dentry, inode);
out: unlock_kernel();
@ -478,20 +486,29 @@ static mode_t romfs_modemap[] =
S_IFBLK+0600, S_IFCHR+0600, S_IFSOCK+0644, S_IFIFO+0644
};
static void
romfs_read_inode(struct inode *i)
static struct inode *
romfs_iget(struct super_block *sb, unsigned long ino)
{
int nextfh, ino;
int nextfh;
struct romfs_inode ri;
struct inode *i;
ino &= ROMFH_MASK;
i = iget_locked(sb, ino);
if (!i)
return ERR_PTR(-ENOMEM);
if (!(i->i_state & I_NEW))
return i;
ino = i->i_ino & ROMFH_MASK;
i->i_mode = 0;
/* Loop for finding the real hard link */
for(;;) {
if (romfs_copyfrom(i, &ri, ino, ROMFH_SIZE) <= 0) {
printk("romfs: read error for inode 0x%x\n", ino);
return;
printk(KERN_ERR "romfs: read error for inode 0x%lx\n",
ino);
iget_failed(i);
return ERR_PTR(-EIO);
}
/* XXX: do romfs_checksum here too (with name) */
@ -548,6 +565,8 @@ romfs_read_inode(struct inode *i)
init_special_inode(i, ino,
MKDEV(nextfh>>16,nextfh&0xffff));
}
unlock_new_inode(i);
return i;
}
static struct kmem_cache * romfs_inode_cachep;
@ -599,7 +618,6 @@ static int romfs_remount(struct super_block *sb, int *flags, char *data)
static const struct super_operations romfs_ops = {
.alloc_inode = romfs_alloc_inode,
.destroy_inode = romfs_destroy_inode,
.read_inode = romfs_read_inode,
.statfs = romfs_statfs,
.remount_fs = romfs_remount,
};