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simplify get_cramfs_inode()

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simply don't hash the inodes that don't have real inumber instead of
skipping them during iget5_locked(); as the result, simple iget_locked()
would do and we can get rid of cramfs ->drop_inode() as well.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2010-06-04 21:19:01 -04:00
parent b69257f250
commit 77b8a75f5b
1 changed files with 38 additions and 50 deletions
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48
fs/cramfs/inode.c
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@ -39,29 +39,9 @@ static DEFINE_MUTEX(read_mutex);
#define CRAMINO(x) (((x)->offset && (x)->size)?(x)->offset<<2:1) #define CRAMINO(x) (((x)->offset && (x)->size)?(x)->offset<<2:1)
#define OFFSET(x) ((x)->i_ino) #define OFFSET(x) ((x)->i_ino)
static void setup_inode(struct inode *inode, struct cramfs_inode * cramfs_inode)
static int cramfs_iget5_test(struct inode *inode, void *opaque)
{ {
struct cramfs_inode *cramfs_inode = opaque;
return inode->i_ino == CRAMINO(cramfs_inode) && inode->i_ino != 1;
}
static int cramfs_iget5_set(struct inode *inode, void *opaque)
{
struct cramfs_inode *cramfs_inode = opaque;
inode->i_ino = CRAMINO(cramfs_inode);
return 0;
}
static struct inode *get_cramfs_inode(struct super_block *sb,
struct cramfs_inode * cramfs_inode)
{
struct inode *inode = iget5_locked(sb, CRAMINO(cramfs_inode),
cramfs_iget5_test, cramfs_iget5_set,
cramfs_inode);
static struct timespec zerotime; static struct timespec zerotime;
if (inode && (inode->i_state & I_NEW)) {
inode->i_mode = cramfs_inode->mode; inode->i_mode = cramfs_inode->mode;
inode->i_uid = cramfs_inode->uid; inode->i_uid = cramfs_inode->uid;
inode->i_size = cramfs_inode->size; inode->i_size = cramfs_inode->size;
@ -86,17 +66,26 @@ static struct inode *get_cramfs_inode(struct super_block *sb,
init_special_inode(inode, inode->i_mode, init_special_inode(inode, inode->i_mode,
old_decode_dev(cramfs_inode->size)); old_decode_dev(cramfs_inode->size));
} }
unlock_new_inode(inode);
}
return inode;
} }
static void cramfs_drop_inode(struct inode *inode) static struct inode *get_cramfs_inode(struct super_block *sb,
struct cramfs_inode * cramfs_inode)
{ {
if (inode->i_ino == 1) struct inode *inode;
generic_delete_inode(inode); if (CRAMINO(cramfs_inode) == 1) {
else inode = new_inode(sb);
generic_drop_inode(inode); if (inode) {
inode->i_ino = 1;
setup_inode(inode, cramfs_inode);
}
} else {
inode = iget_locked(sb, CRAMINO(cramfs_inode));
if (inode) {
setup_inode(inode, cramfs_inode);
unlock_new_inode(inode);
}
}
return inode;
} }
/* /*
@ -542,7 +531,6 @@ static const struct super_operations cramfs_ops = {
.put_super = cramfs_put_super, .put_super = cramfs_put_super,
.remount_fs = cramfs_remount, .remount_fs = cramfs_remount,
.statfs = cramfs_statfs, .statfs = cramfs_statfs,
.drop_inode = cramfs_drop_inode,
}; };
static int cramfs_get_sb(struct file_system_type *fs_type, static int cramfs_get_sb(struct file_system_type *fs_type,