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

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
...@@ -1242,8 +1242,6 @@ struct f2fs_sb_info { ...@@ -1242,8 +1242,6 @@ struct f2fs_sb_info {
unsigned int nquota_files; /* # of quota sysfile */ unsigned int nquota_files; /* # of quota sysfile */
u32 s_next_generation; /* for NFS support */
/* # of pages, see count_type */ /* # of pages, see count_type */
atomic_t nr_pages[NR_COUNT_TYPE]; atomic_t nr_pages[NR_COUNT_TYPE];
/* # of allocated blocks */ /* # of allocated blocks */
......
...@@ -10,6 +10,7 @@ ...@@ -10,6 +10,7 @@
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/sched.h> #include <linux/sched.h>
#include <linux/ctype.h> #include <linux/ctype.h>
#include <linux/random.h>
#include <linux/dcache.h> #include <linux/dcache.h>
#include <linux/namei.h> #include <linux/namei.h>
#include <linux/quotaops.h> #include <linux/quotaops.h>
...@@ -50,7 +51,7 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) ...@@ -50,7 +51,7 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
inode->i_blocks = 0; inode->i_blocks = 0;
inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
F2FS_I(inode)->i_crtime = inode->i_mtime; 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)) if (S_ISDIR(inode->i_mode))
F2FS_I(inode)->i_current_depth = 1; F2FS_I(inode)->i_current_depth = 1;
......
...@@ -3129,7 +3129,6 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent) ...@@ -3129,7 +3129,6 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = sbi->max_file_blocks << sb->s_maxbytes = sbi->max_file_blocks <<
le32_to_cpu(raw_super->log_blocksize); le32_to_cpu(raw_super->log_blocksize);
sb->s_max_links = F2FS_LINK_MAX; sb->s_max_links = F2FS_LINK_MAX;
get_random_bytes(&sbi->s_next_generation, sizeof(u32));
#ifdef CONFIG_QUOTA #ifdef CONFIG_QUOTA
sb->dq_op = &f2fs_quota_operations; sb->dq_op = &f2fs_quota_operations;
......
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