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authorChao Yu <yuchao0@huawei.com>2018-02-26 17:04:13 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2018-03-13 02:05:48 +0300
commit846ae671ad368e344a2b141c0f19e1014b27a0dd (patch)
treeb220f05ab079e37343b841d368a58916388149ab /fs/f2fs/namei.c
parent17cd07ae95073c298af92c1ba14ac58ce84de33b (diff)
downloadlinux-846ae671ad368e344a2b141c0f19e1014b27a0dd.tar.xz
f2fs: expose extension_list sysfs entry
This patch adds a sysfs entry 'extension_list' to support query/add/del item in extension list. Query: cat /sys/fs/f2fs/<device>/extension_list Add: echo 'extension' > /sys/fs/f2fs/<device>/extension_list Del: echo '!extension' > /sys/fs/f2fs/<device>/extension_list Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/namei.c')
-rw-r--r--fs/f2fs/namei.c42
1 files changed, 39 insertions, 3 deletions
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 2ebf3d045dd2..2bd6e9f5746a 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -171,16 +171,52 @@ static int is_multimedia_file(const unsigned char *s, const char *sub)
static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
const unsigned char *name)
{
- int i;
- __u8 (*extlist)[8] = sbi->raw_super->extension_list;
+ __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
+ int i, count;
+
+ down_read(&sbi->sb_lock);
+
+ count = le32_to_cpu(sbi->raw_super->extension_count);
- int count = le32_to_cpu(sbi->raw_super->extension_count);
for (i = 0; i < count; i++) {
if (is_multimedia_file(name, extlist[i])) {
file_set_cold(inode);
break;
}
}
+
+ up_read(&sbi->sb_lock);
+}
+
+int update_extension_list(struct f2fs_sb_info *sbi, const char *name, bool set)
+{
+ __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
+ int count = le32_to_cpu(sbi->raw_super->extension_count);
+ int i;
+
+ for (i = 0; i < count; i++) {
+ if (strcmp(name, extlist[i]))
+ continue;
+
+ if (set)
+ return -EINVAL;
+
+ memcpy(extlist[i], extlist[i + 1],
+ F2FS_EXTENSION_LEN * (count - i - 1));
+ memset(extlist[count - 1], 0, F2FS_EXTENSION_LEN);
+ sbi->raw_super->extension_count = cpu_to_le32(count - 1);
+ return 0;
+ }
+
+ if (!set)
+ return -EINVAL;
+
+ if (count == F2FS_MAX_EXTENSION)
+ return -EINVAL;
+
+ strncpy(extlist[count], name, strlen(name));
+ sbi->raw_super->extension_count = cpu_to_le32(count + 1);
+ return 0;
}
static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,