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nilfs2: move next generation counter into nilfs object 

Moves s_next_generation counter and a spinlock protecting it to nilfs
object from nilfs_sb_info structure.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Ryusuke Konishi 2011-03-09 11:05:08 +09:00
parent 693dd32122
commit 9b1fc4e497
5 changed files with 15 additions and 19 deletions
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8
fs/nilfs2/inode.c
View File

@ -295,7 +295,7 @@ const struct address_space_operations nilfs_aops = {
struct inode *nilfs_new_inode(struct inode *dir, int mode)
{
struct super_block *sb = dir->i_sb;
struct nilfs_sb_info *sbi = NILFS_SB(sb);
struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
struct inode *inode;
struct nilfs_inode_info *ii;
struct nilfs_root *root;
@ -340,9 +340,9 @@ struct inode *nilfs_new_inode(struct inode *dir, int mode)
/* ii->i_dir_acl = 0; */
ii->i_dir_start_lookup = 0;
nilfs_set_inode_flags(inode);
spin_lock(&sbi->s_next_gen_lock);
inode->i_generation = sbi->s_next_generation++;
spin_unlock(&sbi->s_next_gen_lock);
spin_lock(&nilfs->ns_next_gen_lock);
inode->i_generation = nilfs->ns_next_generation++;
spin_unlock(&nilfs->ns_next_gen_lock);
insert_inode_hash(inode);
err = nilfs_init_acl(inode, dir);

4
fs/nilfs2/sb.h
View File

@ -40,10 +40,6 @@ struct nilfs_sb_info {
/* Segment constructor */
struct nilfs_sc_info *s_sc_info; /* segment constructor info */
/* Inode allocator */
spinlock_t s_next_gen_lock;
u32 s_next_generation;
};
static inline struct nilfs_sb_info *NILFS_SB(struct super_block *sb)

11
fs/nilfs2/super.c
View File

@ -43,7 +43,6 @@
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/parser.h>
#include <linux/random.h>
#include <linux/crc32.h>
#include <linux/vfs.h>
#include <linux/writeback.h>
@ -943,16 +942,6 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent)
if (err)
goto failed_nilfs;
/*
* Following initialization is overlapped because
* nilfs_sb_info structure has been cleared at the beginning.
* But we reserve them to keep our interest and make ready
* for the future change.
*/
get_random_bytes(&sbi->s_next_generation,
sizeof(sbi->s_next_generation));
spin_lock_init(&sbi->s_next_gen_lock);
sb->s_op = &nilfs_sops;
sb->s_export_op = &nilfs_export_ops;
sb->s_root = NULL;

5
fs/nilfs2/the_nilfs.c
View File

@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/backing-dev.h>
#include <linux/random.h>
#include <linux/crc32.h>
#include "nilfs.h"
#include "segment.h"
@ -78,6 +79,7 @@ struct the_nilfs *alloc_nilfs(struct block_device *bdev)
INIT_LIST_HEAD(&nilfs->ns_dirty_files);
INIT_LIST_HEAD(&nilfs->ns_gc_inodes);
spin_lock_init(&nilfs->ns_inode_lock);
spin_lock_init(&nilfs->ns_next_gen_lock);
spin_lock_init(&nilfs->ns_last_segment_lock);
nilfs->ns_cptree = RB_ROOT;
spin_lock_init(&nilfs->ns_cptree_lock);
@ -593,6 +595,9 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data)
nilfs->ns_blocksize_bits = sb->s_blocksize_bits;
nilfs->ns_blocksize = blocksize;
get_random_bytes(&nilfs->ns_next_generation,
sizeof(nilfs->ns_next_generation));
err = nilfs_store_disk_layout(nilfs, sbp);
if (err)
goto failed_sbh;

6
fs/nilfs2/the_nilfs.h
View File

@ -74,6 +74,8 @@ enum {
* @ns_dirty_files: list of dirty files
* @ns_inode_lock: lock protecting @ns_dirty_files
* @ns_gc_inodes: dummy inodes to keep live blocks
* @ns_next_generation: next generation number for inodes
* @ns_next_gen_lock: lock protecting @ns_next_generation
* @ns_mount_opt: mount options
* @ns_resuid: uid for reserved blocks
* @ns_resgid: gid for reserved blocks
@ -159,6 +161,10 @@ struct the_nilfs {
/* GC inode list */
struct list_head ns_gc_inodes;
/* Inode allocator */
u32 ns_next_generation;
spinlock_t ns_next_gen_lock;
/* Mount options */
unsigned long ns_mount_opt;