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authorJaegeuk Kim <jaegeuk@kernel.org>2019-02-25 09:46:45 -0800
committerJaegeuk Kim <jaegeuk@kernel.org>2019-03-12 18:59:18 -0700
commit428e3bcf07696ff252b7ff3ff7711c2b9bbdb908 (patch)
treeac45ae40c6165175976cc197c5b4e201ca9df644 /fs
parent613f3dcdf0d8ffdb3e5d820f6d69076905efddc3 (diff)
downloadlinux-428e3bcf07696ff252b7ff3ff7711c2b9bbdb908.tar.bz2
f2fs: give random value to i_generation
This follows to give random number to i_generation along with commit 232530680290b ("ext4: improve smp scalability for inode generation") This can be used for DUN for UFS HW encryption. Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/f2fs/f2fs.h2
-rw-r--r--fs/f2fs/namei.c3
-rw-r--r--fs/f2fs/super.c1
3 files changed, 2 insertions, 4 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 19cbf17550c7..3007759dd2dd 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -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 */
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 62d9829f3a6a..f218d9424d8b 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -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;
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 45121190a2ba..42eb5c86330a 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -3129,7 +3129,6 @@ try_onemore:
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;