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cramfs: get_cramfs_inode() returns ERR_PTR() on failure

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... and we want to report these failures in ->lookup() anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-07-17 19:04:14 -04:00
parent 642c937b4e
commit 0577d1ba41
1 changed files with 12 additions and 10 deletions
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22
fs/cramfs/inode.c
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@ -37,7 +37,7 @@ static DEFINE_MUTEX(read_mutex);
/* These macros may change in future, to provide better st_ino semantics. */
#define OFFSET(x) ((x)->i_ino)
static unsigned long cramino(struct cramfs_inode *cino, unsigned int offset)
static unsigned long cramino(const struct cramfs_inode *cino, unsigned int offset)
{
if (!cino->offset)
return offset + 1;
@ -61,7 +61,7 @@ static unsigned long cramino(struct cramfs_inode *cino, unsigned int offset)
}
static struct inode *get_cramfs_inode(struct super_block *sb,
struct cramfs_inode *cramfs_inode, unsigned int offset)
const struct cramfs_inode *cramfs_inode, unsigned int offset)
{
struct inode *inode;
static struct timespec zerotime;
@ -317,7 +317,7 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
/* Set it all up.. */
sb->s_op = &cramfs_ops;
root = get_cramfs_inode(sb, &super.root, 0);
if (!root)
if (IS_ERR(root))
goto out;
sb->s_root = d_alloc_root(root);
if (!sb->s_root) {
@ -423,6 +423,7 @@ static int cramfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
unsigned int offset = 0;
struct inode *inode = NULL;
int sorted;
mutex_lock(&read_mutex);
@ -449,8 +450,8 @@ static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, s
for (;;) {
if (!namelen) {
mutex_unlock(&read_mutex);
return ERR_PTR(-EIO);
inode = ERR_PTR(-EIO);
goto out;
}
if (name[namelen-1])
break;
@ -462,17 +463,18 @@ static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, s
if (retval > 0)
continue;
if (!retval) {
struct cramfs_inode entry = *de;
mutex_unlock(&read_mutex);
d_add(dentry, get_cramfs_inode(dir->i_sb, &entry, dir_off));
return NULL;
inode = get_cramfs_inode(dir->i_sb, de, dir_off);
break;
}
/* else (retval < 0) */
if (sorted)
break;
}
out:
mutex_unlock(&read_mutex);
d_add(dentry, NULL);
if (IS_ERR(inode))
return ERR_CAST(inode);
d_add(dentry, inode);
return NULL;
}