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nilfs2: use iget5_locked to get inode 

This uses iget5_locked instead of iget_locked so that gc cache can
look up inodes with an inode number and an optional checkpoint number.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Ryusuke Konishi 2010-08-20 21:20:29 +09:00
parent 6c43f41000
commit 0e14a3595b
2 changed files with 35 additions and 3 deletions
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37
fs/nilfs2/inode.c
View File

@ -34,6 +34,11 @@
#include "cpfile.h"
#include "ifile.h"
struct nilfs_iget_args {
u64 ino;
__u64 cno;
int for_gc;
};
/**
* nilfs_get_block() - get a file block on the filesystem (callback function)
@ -320,7 +325,6 @@ struct inode *nilfs_new_inode(struct inode *dir, int mode)
/* ii->i_file_acl = 0; */
/* ii->i_dir_acl = 0; */
ii->i_dir_start_lookup = 0;
ii->i_cno = 0;
nilfs_set_inode_flags(inode);
spin_lock(&sbi->s_next_gen_lock);
inode->i_generation = sbi->s_next_generation++;
@ -410,7 +414,6 @@ int nilfs_read_inode_common(struct inode *inode,
0 : le32_to_cpu(raw_inode->i_dir_acl);
#endif
ii->i_dir_start_lookup = 0;
ii->i_cno = 0;
inode->i_generation = le32_to_cpu(raw_inode->i_generation);
if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
@ -476,12 +479,40 @@ static int __nilfs_read_inode(struct super_block *sb, unsigned long ino,
return err;
}
static int nilfs_iget_test(struct inode *inode, void *opaque)
{
struct nilfs_iget_args *args = opaque;
struct nilfs_inode_info *ii;
if (args->ino != inode->i_ino)
return 0;
ii = NILFS_I(inode);
if (!test_bit(NILFS_I_GCINODE, &ii->i_state))
return !args->for_gc;
return args->for_gc && args->cno == ii->i_cno;
}
static int nilfs_iget_set(struct inode *inode, void *opaque)
{
struct nilfs_iget_args *args = opaque;
inode->i_ino = args->ino;
if (args->for_gc) {
NILFS_I(inode)->i_state = 1 << NILFS_I_GCINODE;
NILFS_I(inode)->i_cno = args->cno;
}
return 0;
}
struct inode *nilfs_iget(struct super_block *sb, unsigned long ino)
{
struct nilfs_iget_args args = { .ino = ino, .cno = 0, .for_gc = 0 };
struct inode *inode;
int err;
inode = iget_locked(sb, ino);
inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args);
if (unlikely(!inode))
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))

1
fs/nilfs2/super.c
View File

@ -155,6 +155,7 @@ struct inode *nilfs_alloc_inode_common(struct the_nilfs *nilfs)
return NULL;
ii->i_bh = NULL;
ii->i_state = 0;
ii->i_cno = 0;
ii->vfs_inode.i_version = 1;
nilfs_btnode_cache_init(&ii->i_btnode_cache, nilfs->ns_bdi);
return &ii->vfs_inode;