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authorChristoph Hellwig <hch@tuxera.com>2010-10-01 05:43:41 +0200
committerChristoph Hellwig <hch@lst.de>2010-10-01 05:43:41 +0200
commitfc4fff82104fa096eada73943fe5249500acd5fa (patch)
tree5fefc3512525a08d9a77723706cde96d001c167f /fs/hfsplus
parent6af502de224c3742936d54eee7e3690c09822934 (diff)
hfsplus: clean up hfsplus_iget
Add a new hfsplus_system_read_inode for reading the special system inodes and streamline the fastpath iget code. Signed-off-by: Christoph Hellwig <hch@tuxera.com>
Diffstat (limited to 'fs/hfsplus')
-rw-r--r--fs/hfsplus/super.c77
1 files changed, 40 insertions, 37 deletions
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index a7bf89e85b3..bd09ea23435 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -20,12 +20,42 @@ static void hfsplus_destroy_inode(struct inode *inode);
#include "hfsplus_fs.h"
+static int hfsplus_system_read_inode(struct inode *inode)
+{
+ struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr;
+
+ switch (inode->i_ino) {
+ case HFSPLUS_EXT_CNID:
+ hfsplus_inode_read_fork(inode, &vhdr->ext_file);
+ inode->i_mapping->a_ops = &hfsplus_btree_aops;
+ break;
+ case HFSPLUS_CAT_CNID:
+ hfsplus_inode_read_fork(inode, &vhdr->cat_file);
+ inode->i_mapping->a_ops = &hfsplus_btree_aops;
+ break;
+ case HFSPLUS_ALLOC_CNID:
+ hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
+ inode->i_mapping->a_ops = &hfsplus_aops;
+ break;
+ case HFSPLUS_START_CNID:
+ hfsplus_inode_read_fork(inode, &vhdr->start_file);
+ break;
+ case HFSPLUS_ATTR_CNID:
+ hfsplus_inode_read_fork(inode, &vhdr->attr_file);
+ inode->i_mapping->a_ops = &hfsplus_btree_aops;
+ break;
+ default:
+ return -EIO;
+ }
+
+ return 0;
+}
+
struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
{
struct hfs_find_data fd;
- struct hfsplus_vh *vhdr;
struct inode *inode;
- long err = -EIO;
+ int err;
inode = iget_locked(sb, ino);
if (!inode)
@@ -39,51 +69,24 @@ struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
HFSPLUS_I(inode)->rsrc_inode = NULL;
atomic_set(&HFSPLUS_I(inode)->opencnt, 0);
- if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) {
- read_inode:
+ if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
+ inode->i_ino == HFSPLUS_ROOT_CNID) {
hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
if (!err)
err = hfsplus_cat_read_inode(inode, &fd);
hfs_find_exit(&fd);
- if (err)
- goto bad_inode;
- goto done;
+ } else {
+ err = hfsplus_system_read_inode(inode);
}
- vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr;
- switch(inode->i_ino) {
- case HFSPLUS_ROOT_CNID:
- goto read_inode;
- case HFSPLUS_EXT_CNID:
- hfsplus_inode_read_fork(inode, &vhdr->ext_file);
- inode->i_mapping->a_ops = &hfsplus_btree_aops;
- break;
- case HFSPLUS_CAT_CNID:
- hfsplus_inode_read_fork(inode, &vhdr->cat_file);
- inode->i_mapping->a_ops = &hfsplus_btree_aops;
- break;
- case HFSPLUS_ALLOC_CNID:
- hfsplus_inode_read_fork(inode, &vhdr->alloc_file);
- inode->i_mapping->a_ops = &hfsplus_aops;
- break;
- case HFSPLUS_START_CNID:
- hfsplus_inode_read_fork(inode, &vhdr->start_file);
- break;
- case HFSPLUS_ATTR_CNID:
- hfsplus_inode_read_fork(inode, &vhdr->attr_file);
- inode->i_mapping->a_ops = &hfsplus_btree_aops;
- break;
- default:
- goto bad_inode;
+
+ if (err) {
+ iget_failed(inode);
+ return ERR_PTR(err);
}
-done:
unlock_new_inode(inode);
return inode;
-
-bad_inode:
- iget_failed(inode);
- return ERR_PTR(err);
}
static int hfsplus_write_inode(struct inode *inode,