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coda: deal correctly with allocation failure from coda_cnode_makectl()

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lookup should fail with ENOMEM, not silently make dentry negative.
Switched to saner calling conventions, while we are at it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-01-10 10:46:03 -05:00
parent 3e25eb9c4b
commit 0b2c4e39c0
3 changed files with 12 additions and 15 deletions
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21
fs/coda/cnode.c
View File

@ -156,19 +156,16 @@ struct inode *coda_fid_to_inode(struct CodaFid *fid, struct super_block *sb)
}
/* the CONTROL inode is made without asking attributes from Venus */
int coda_cnode_makectl(struct inode **inode, struct super_block *sb)
struct inode *coda_cnode_makectl(struct super_block *sb)
{
int error = -ENOMEM;
*inode = new_inode(sb);
if (*inode) {
(*inode)->i_ino = CTL_INO;
(*inode)->i_op = &coda_ioctl_inode_operations;
(*inode)->i_fop = &coda_ioctl_operations;
(*inode)->i_mode = 0444;
error = 0;
struct inode *inode = new_inode(sb);
if (inode) {
inode->i_ino = CTL_INO;
inode->i_op = &coda_ioctl_inode_operations;
inode->i_fop = &coda_ioctl_operations;
inode->i_mode = 0444;
return inode;
}
return error;
return ERR_PTR(-ENOMEM);
}

2
fs/coda/coda_fs_i.h
View File

@ -51,7 +51,7 @@ struct coda_file_info {
int coda_cnode_make(struct inode **, struct CodaFid *, struct super_block *);
struct inode *coda_iget(struct super_block *sb, struct CodaFid *fid, struct coda_vattr *attr);
int coda_cnode_makectl(struct inode **inode, struct super_block *sb);
struct inode *coda_cnode_makectl(struct super_block *sb);
struct inode *coda_fid_to_inode(struct CodaFid *fid, struct super_block *sb);
void coda_replace_fid(struct inode *, struct CodaFid *, struct CodaFid *);

4
fs/coda/dir.c
View File

@ -111,7 +111,7 @@ static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struc
/* control object, create inode on the fly */
if (coda_isroot(dir) && coda_iscontrol(name, length)) {
error = coda_cnode_makectl(&inode, dir->i_sb);
inode = coda_cnode_makectl(dir->i_sb);
type = CODA_NOCACHE;
goto exit;
}
@ -125,7 +125,7 @@ static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struc
return ERR_PTR(error);
exit:
if (inode && (type & CODA_NOCACHE))
if (inode && !IS_ERR(inode) && (type & CODA_NOCACHE))
coda_flag_inode(inode, C_VATTR | C_PURGE);
return d_splice_alias(inode, entry);