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authorAl Viro <viro@zeniv.linux.org.uk>2018-04-30 20:08:17 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2018-05-22 14:27:55 -0400
commit8130c15176ae0a526c98342c2dd9b70d3427999d (patch)
tree5c9631b8ea837076954de6cf51b81393589288ec /fs/romfs
parentc1481700f421d66c9fa93e5aa4680d4ce4d9b52f (diff)
downloadlinux-8130c15176ae0a526c98342c2dd9b70d3427999d.tar.gz
romfs_lookup: switch to d_splice_alias()
... and hash negative lookups Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/romfs')
-rw-r--r--fs/romfs/super.c36
1 files changed, 9 insertions, 27 deletions
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index 8f06fd1f3d69..6ccb51993a76 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -213,7 +213,7 @@ static struct dentry *romfs_lookup(struct inode *dir, struct dentry *dentry,
unsigned int flags)
{
unsigned long offset, maxoff;
- struct inode *inode;
+ struct inode *inode = NULL;
struct romfs_inode ri;
const char *name; /* got from dentry */
int len, ret;
@@ -233,7 +233,7 @@ static struct dentry *romfs_lookup(struct inode *dir, struct dentry *dentry,
for (;;) {
if (!offset || offset >= maxoff)
- goto out0;
+ break;
ret = romfs_dev_read(dir->i_sb, offset, &ri, sizeof(ri));
if (ret < 0)
@@ -244,37 +244,19 @@ static struct dentry *romfs_lookup(struct inode *dir, struct dentry *dentry,
len);
if (ret < 0)
goto error;
- if (ret == 1)
+ if (ret == 1) {
+ /* Hard link handling */
+ if ((be32_to_cpu(ri.next) & ROMFH_TYPE) == ROMFH_HRD)
+ offset = be32_to_cpu(ri.spec) & ROMFH_MASK;
+ inode = romfs_iget(dir->i_sb, offset);
break;
+ }
/* next entry */
offset = be32_to_cpu(ri.next) & ROMFH_MASK;
}
- /* Hard link handling */
- if ((be32_to_cpu(ri.next) & ROMFH_TYPE) == ROMFH_HRD)
- offset = be32_to_cpu(ri.spec) & ROMFH_MASK;
-
- inode = romfs_iget(dir->i_sb, offset);
- if (IS_ERR(inode)) {
- ret = PTR_ERR(inode);
- goto error;
- }
- goto outi;
-
- /*
- * it's a bit funky, _lookup needs to return an error code
- * (negative) or a NULL, both as a dentry. ENOENT should not
- * be returned, instead we need to create a negative dentry by
- * d_add(dentry, NULL); and return 0 as no error.
- * (Although as I see, it only matters on writable file
- * systems).
- */
-out0:
- inode = NULL;
-outi:
- d_add(dentry, inode);
- ret = 0;
+ return d_splice_alias(inode, dentry);
error:
return ERR_PTR(ret);
}