From: Hongbo Li <lihongb...@huawei.com>
The new mount api will execute .parse_param, .init_fs_context, .get_tree
and will call .remount if remount happened. So we add the necessary
functions for the fs_context_operations. If .init_fs_context is added,
the old .mount should remove.
See Documentation/filesystems/mount_api.rst for more information.
Signed-off-by: Hongbo Li <lihongb...@huawei.com>
[sandeen: forward port]
Signed-off-by: Eric Sandeen <sand...@redhat.com>
---
fs/f2fs/super.c | 156 +++++++++++++++++++-----------------------------
1 file changed, 62 insertions(+), 94 deletions(-)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 37497fd80bb9..041bd6c482a0 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1141,47 +1141,6 @@ static int f2fs_parse_param(struct fs_context *fc,
struct fs_parameter *param)
return 0;
}
-static int parse_options(struct fs_context *fc, char *options)
-{
- struct fs_parameter param;
- char *key;
- int ret;
-
- if (!options)
- return 0;
-
- while ((key = strsep(&options, ",")) != NULL) {
- if (*key) {
- size_t v_len = 0;
- char *value = strchr(key, '=');
-
- param.type = fs_value_is_flag;
- param.string = NULL;
-
- if (value) {
- if (value == key)
- continue;
-
- *value++ = 0;
- v_len = strlen(value);
- param.string = kmemdup_nul(value, v_len,
GFP_KERNEL);
- if (!param.string)
- return -ENOMEM;
- param.type = fs_value_is_string;
- }
-
- param.key = key;
- param.size = v_len;
-
- ret = f2fs_parse_param(fc, ¶m);
- kfree(param.string);
- if (ret < 0)
- return ret;
- }
- }
- return 0;
-}
-
/*
* Check quota settings consistency.
*/
@@ -2583,13 +2542,12 @@ static void f2fs_enable_checkpoint(struct f2fs_sb_info
*sbi)
f2fs_flush_ckpt_thread(sbi);
}
-static int f2fs_remount(struct super_block *sb, int *flags, char *data)
+static int __f2fs_remount(struct fs_context *fc, struct super_block *sb)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct f2fs_mount_info org_mount_opt;
- struct f2fs_fs_context ctx;
- struct fs_context fc;
unsigned long old_sb_flags;
+ unsigned int flags = fc->sb_flags;
int err;
bool need_restart_gc = false, need_stop_gc = false;
bool need_restart_flush = false, need_stop_flush = false;
@@ -2635,7 +2593,7 @@ static int f2fs_remount(struct super_block *sb, int
*flags, char *data)
#endif
/* recover superblocks we couldn't write due to previous RO mount */
- if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
+ if (!(flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
err = f2fs_commit_super(sbi, false);
f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
err);
@@ -2645,21 +2603,11 @@ static int f2fs_remount(struct super_block *sb, int
*flags, char *data)
default_options(sbi, true);
- memset(&fc, 0, sizeof(fc));
- memset(&ctx, 0, sizeof(ctx));
- fc.fs_private = &ctx;
- fc.purpose = FS_CONTEXT_FOR_RECONFIGURE;
-
- /* parse mount options */
- err = parse_options(&fc, data);
- if (err)
- goto restore_opts;
-
- err = f2fs_check_opt_consistency(&fc, sb);
+ err = f2fs_check_opt_consistency(fc, sb);
if (err < 0)
goto restore_opts;
- f2fs_apply_options(&fc, sb);
+ f2fs_apply_options(fc, sb);
#ifdef CONFIG_BLK_DEV_ZONED
if (f2fs_sb_has_blkzoned(sbi) &&
@@ -2678,20 +2626,20 @@ static int f2fs_remount(struct super_block *sb, int
*flags, char *data)
* Previous and new state of filesystem is RO,
* so skip checking GC and FLUSH_MERGE conditions.
*/
- if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
+ if (f2fs_readonly(sb) && (flags & SB_RDONLY))
goto skip;
- if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) {
+ if (f2fs_dev_is_readonly(sbi) && !(flags & SB_RDONLY)) {
err = -EROFS;
goto restore_opts;
}
#ifdef CONFIG_QUOTA
- if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
+ if (!f2fs_readonly(sb) && (flags & SB_RDONLY)) {
err = dquot_suspend(sb, -1);
if (err < 0)
goto restore_opts;
- } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
+ } else if (f2fs_readonly(sb) && !(flags & SB_RDONLY)) {
/* dquot_resume needs RW */
sb->s_flags &= ~SB_RDONLY;
if (sb_any_quota_suspended(sb)) {
@@ -2747,7 +2695,7 @@ static int f2fs_remount(struct super_block *sb, int
*flags, char *data)
goto restore_opts;
}
- if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
+ if ((flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
err = -EINVAL;
f2fs_warn(sbi, "disabling checkpoint not compatible with
read-only");
goto restore_opts;
@@ -2758,7 +2706,7 @@ static int f2fs_remount(struct super_block *sb, int
*flags, char *data)
* or if background_gc = off is passed in mount
* option. Also sync the filesystem.
*/
- if ((*flags & SB_RDONLY) ||
+ if ((flags & SB_RDONLY) ||
(F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
!test_opt(sbi, GC_MERGE))) {
if (sbi->gc_thread) {
@@ -2772,7 +2720,7 @@ static int f2fs_remount(struct super_block *sb, int
*flags, char *data)
need_stop_gc = true;
}
- if (*flags & SB_RDONLY) {
+ if (flags & SB_RDONLY) {
sync_inodes_sb(sb);
set_sbi_flag(sbi, SBI_IS_DIRTY);
@@ -2785,7 +2733,7 @@ static int f2fs_remount(struct super_block *sb, int
*flags, char *data)
* We stop issue flush thread if FS is mounted as RO
* or if flush_merge is not passed in mount option.
*/
- if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
+ if ((flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
clear_opt(sbi, FLUSH_MERGE);
f2fs_destroy_flush_cmd_control(sbi, false);
need_restart_flush = true;
@@ -2827,7 +2775,7 @@ static int f2fs_remount(struct super_block *sb, int
*flags, char *data)
* triggered while remount and we need to take care of it before
* returning from remount.
*/
- if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
+ if ((flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
!test_opt(sbi, MERGE_CHECKPOINT)) {
f2fs_stop_ckpt_thread(sbi);
} else {
@@ -2854,7 +2802,7 @@ static int f2fs_remount(struct super_block *sb, int
*flags, char *data)
(test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
limit_reserve_root(sbi);
- *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
+ fc->sb_flags = (flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
sbi->umount_lock_holder = NULL;
return 0;
@@ -3523,7 +3471,6 @@ static const struct super_operations f2fs_sops = {
.freeze_fs = f2fs_freeze,
.unfreeze_fs = f2fs_unfreeze,
.statfs = f2fs_statfs,
- .remount_fs = f2fs_remount,
.shutdown = f2fs_shutdown,
};
@@ -4745,16 +4692,13 @@ static void f2fs_tuning_parameters(struct f2fs_sb_info
*sbi)
sbi->readdir_ra = true;
}
-static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
+static int f2fs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct f2fs_sb_info *sbi;
struct f2fs_super_block *raw_super;
- struct f2fs_fs_context ctx;
- struct fs_context fc;
struct inode *root;
int err;
bool skip_recovery = false, need_fsck = false;
- char *options = NULL;
int recovery, i, valid_super_block;
struct curseg_info *seg_i;
int retry_cnt = 1;
@@ -4767,9 +4711,6 @@ static int f2fs_fill_super(struct super_block *sb, void
*data, int silent)
raw_super = NULL;
valid_super_block = -1;
recovery = 0;
- memset(&fc, 0, sizeof(fc));
- memset(&ctx, 0, sizeof(ctx));
- fc.fs_private = &ctx;
/* allocate memory for f2fs-specific super block info */
sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
@@ -4820,22 +4761,12 @@ static int f2fs_fill_super(struct super_block *sb, void
*data, int silent)
sizeof(raw_super->uuid));
default_options(sbi, false);
- /* parse mount options */
- options = kstrdup((const char *)data, GFP_KERNEL);
- if (data && !options) {
- err = -ENOMEM;
- goto free_sb_buf;
- }
-
- err = parse_options(&fc, options);
- if (err)
- goto free_options;
- err = f2fs_check_opt_consistency(&fc, sb);
+ err = f2fs_check_opt_consistency(fc, sb);
if (err < 0)
- goto free_options;
+ goto free_sb_buf;
- f2fs_apply_options(&fc, sb);
+ f2fs_apply_options(fc, sb);
sb->s_maxbytes = max_file_blocks(NULL) <<
le32_to_cpu(raw_super->log_blocksize);
@@ -5160,7 +5091,6 @@ static int f2fs_fill_super(struct super_block *sb, void
*data, int silent)
if (err)
goto sync_free_meta;
}
- kvfree(options);
/* recover broken superblock */
if (recovery) {
@@ -5255,7 +5185,6 @@ static int f2fs_fill_super(struct super_block *sb, void
*data, int silent)
kfree(F2FS_OPTION(sbi).s_qf_names[i]);
#endif
fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
- kvfree(options);
free_sb_buf:
kfree(raw_super);
free_sbi:
@@ -5271,14 +5200,39 @@ static int f2fs_fill_super(struct super_block *sb, void
*data, int silent)
return err;
}
-static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+static int f2fs_get_tree(struct fs_context *fc)
{
- return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
+ return get_tree_bdev(fc, f2fs_fill_super);
+}
+
+static int f2fs_reconfigure(struct fs_context *fc)
+{
+ struct super_block *sb = fc->root->d_sb;
+
+ return __f2fs_remount(fc, sb);
+}
+
+static void f2fs_fc_free(struct fs_context *fc)
+{
+ struct f2fs_fs_context *ctx = fc->fs_private;
+ int i;
+
+ if (!ctx)
+ return;
+
+#ifdef CONFIG_QUOTA
+ for (i = 0; i < MAXQUOTAS; i++)
+ kfree(F2FS_CTX_INFO(ctx).s_qf_names[i]);
+#endif
+ fscrypt_free_dummy_policy(&F2FS_CTX_INFO(ctx).dummy_enc_policy);
+ kfree(ctx);
}
static const struct fs_context_operations f2fs_context_ops = {
.parse_param = f2fs_parse_param,
+ .get_tree = f2fs_get_tree,
+ .reconfigure = f2fs_reconfigure,
+ .free = f2fs_fc_free,
};
static void kill_f2fs_super(struct super_block *sb)
@@ -5322,10 +5276,24 @@ static void kill_f2fs_super(struct super_block *sb)
}
}
+static int f2fs_init_fs_context(struct fs_context *fc)
+{
+ struct f2fs_fs_context *ctx;
+
+ ctx = kzalloc(sizeof(struct f2fs_fs_context), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ fc->fs_private = ctx;
+ fc->ops = &f2fs_context_ops;
+
+ return 0;
+}
+
static struct file_system_type f2fs_fs_type = {
.owner = THIS_MODULE,
.name = "f2fs",
- .mount = f2fs_mount,
+ .init_fs_context = f2fs_init_fs_context,
.kill_sb = kill_f2fs_super,
.fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
};
--
2.49.0
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