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Commit 428e3bcf authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: give random value to i_generation 



This follows to give random number to i_generation along with commit
23253068 ("ext4: improve smp scalability for inode generation")

This can be used for DUN for UFS HW encryption.

Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 613f3dcd

fs/f2fs/f2fs.h

+0 −2
Original line number Diff line number Diff line
@@ -1242,8 +1242,6 @@ struct f2fs_sb_info { 


	unsigned int nquota_files;		/* # of quota sysfile */



	u32 s_next_generation;			/* for NFS support */



	/* # of pages, see count_type */

	atomic_t nr_pages[NR_COUNT_TYPE];

	/* # of allocated blocks */

fs/f2fs/namei.c

+2 −1
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
#include <linux/pagemap.h>

#include <linux/sched.h>

#include <linux/ctype.h>

#include <linux/random.h>

#include <linux/dcache.h>

#include <linux/namei.h>

#include <linux/quotaops.h>
@@ -50,7 +51,7 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) 
	inode->i_blocks = 0;

	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);

	F2FS_I(inode)->i_crtime = inode->i_mtime;

	inode->i_generation = sbi->s_next_generation++;

	inode->i_generation = prandom_u32();



	if (S_ISDIR(inode->i_mode))

		F2FS_I(inode)->i_current_depth = 1;

fs/f2fs/super.c

+0 −1
Original line number Diff line number Diff line
@@ -3129,7 +3129,6 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent) 
	sb->s_maxbytes = sbi->max_file_blocks <<

				le32_to_cpu(raw_super->log_blocksize);

	sb->s_max_links = F2FS_LINK_MAX;

	get_random_bytes(&sbi->s_next_generation, sizeof(u32));



#ifdef CONFIG_QUOTA

	sb->dq_op = &f2fs_quota_operations;