Commit c949e036 authored by Baokun Li's avatar Baokun Li Committed by ZhangPeng
Browse files

erofs: get rid of erofs_fs_context 

stable inclusion
from stable-v6.6.32
commit 3924179ba93353ed6f4462f111b5b5a8bee6cd75
bugzilla: https://gitee.com/openeuler/kernel/issues/IA4MGD

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3924179ba93353ed6f4462f111b5b5a8bee6cd75



--------------------------------

commit 07abe43a28b2c660f726d66f5470f7f114f9643a upstream.

Instead of allocating the erofs_sb_info in fill_super() allocate it during
erofs_init_fs_context() and ensure that erofs can always have the info
available during erofs_kill_sb(). After this erofs_fs_context is no longer
needed, replace ctx with sbi, no functional changes.

Suggested-by: default avatarJingbo Xu <jefflexu@linux.alibaba.com>
Signed-off-by: default avatarBaokun Li <libaokun1@huawei.com>
Reviewed-by: default avatarJingbo Xu <jefflexu@linux.alibaba.com>
Reviewed-by: default avatarGao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: default avatarChao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20240419123611.947084-2-libaokun1@huawei.com


[ Gao Xiang: trivial conflict due to a warning message. ]
Signed-off-by: default avatarGao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarZhangPeng <zhangpeng362@huawei.com>
parent 78210c00

fs/erofs/internal.h

+0 −7
Original line number Diff line number Diff line
@@ -82,13 +82,6 @@ struct erofs_dev_context { 
	bool flatdev;

};



struct erofs_fs_context {

	struct erofs_mount_opts opt;

	struct erofs_dev_context *devs;

	char *fsid;

	char *domain_id;

};



/* all filesystem-wide lz4 configurations */

struct erofs_sb_lz4_info {

	/* # of pages needed for EROFS lz4 rolling decompression */

fs/erofs/super.c

+53 −63
Original line number Diff line number Diff line
@@ -367,18 +367,18 @@ static int erofs_read_superblock(struct super_block *sb) 
	return ret;

}



static void erofs_default_options(struct erofs_fs_context *ctx)

static void erofs_default_options(struct erofs_sb_info *sbi)

{

#ifdef CONFIG_EROFS_FS_ZIP

	ctx->opt.cache_strategy = EROFS_ZIP_CACHE_READAROUND;

	ctx->opt.max_sync_decompress_pages = 3;

	ctx->opt.sync_decompress = EROFS_SYNC_DECOMPRESS_AUTO;

	sbi->opt.cache_strategy = EROFS_ZIP_CACHE_READAROUND;

	sbi->opt.max_sync_decompress_pages = 3;

	sbi->opt.sync_decompress = EROFS_SYNC_DECOMPRESS_AUTO;

#endif

#ifdef CONFIG_EROFS_FS_XATTR

	set_opt(&ctx->opt, XATTR_USER);

	set_opt(&sbi->opt, XATTR_USER);

#endif

#ifdef CONFIG_EROFS_FS_POSIX_ACL

	set_opt(&ctx->opt, POSIX_ACL);

	set_opt(&sbi->opt, POSIX_ACL);

#endif

}
@@ -423,17 +423,17 @@ static const struct fs_parameter_spec erofs_fs_parameters[] = { 
static bool erofs_fc_set_dax_mode(struct fs_context *fc, unsigned int mode)

{

#ifdef CONFIG_FS_DAX

	struct erofs_fs_context *ctx = fc->fs_private;

	struct erofs_sb_info *sbi = fc->s_fs_info;



	switch (mode) {

	case EROFS_MOUNT_DAX_ALWAYS:

		warnfc(fc, "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");

		set_opt(&ctx->opt, DAX_ALWAYS);

		clear_opt(&ctx->opt, DAX_NEVER);

		set_opt(&sbi->opt, DAX_ALWAYS);

		clear_opt(&sbi->opt, DAX_NEVER);

		return true;

	case EROFS_MOUNT_DAX_NEVER:

		set_opt(&ctx->opt, DAX_NEVER);

		clear_opt(&ctx->opt, DAX_ALWAYS);

		set_opt(&sbi->opt, DAX_NEVER);

		clear_opt(&sbi->opt, DAX_ALWAYS);

		return true;

	default:

		DBG_BUGON(1);
@@ -448,7 +448,7 @@ static bool erofs_fc_set_dax_mode(struct fs_context *fc, unsigned int mode) 
static int erofs_fc_parse_param(struct fs_context *fc,

				struct fs_parameter *param)

{

	struct erofs_fs_context *ctx = fc->fs_private;

	struct erofs_sb_info *sbi = fc->s_fs_info;

	struct fs_parse_result result;

	struct erofs_device_info *dif;

	int opt, ret;
@@ -461,9 +461,9 @@ static int erofs_fc_parse_param(struct fs_context *fc, 
	case Opt_user_xattr:

#ifdef CONFIG_EROFS_FS_XATTR

		if (result.boolean)

			set_opt(&ctx->opt, XATTR_USER);

			set_opt(&sbi->opt, XATTR_USER);

		else

			clear_opt(&ctx->opt, XATTR_USER);

			clear_opt(&sbi->opt, XATTR_USER);

#else

		errorfc(fc, "{,no}user_xattr options not supported");

#endif
@@ -471,16 +471,16 @@ static int erofs_fc_parse_param(struct fs_context *fc, 
	case Opt_acl:

#ifdef CONFIG_EROFS_FS_POSIX_ACL

		if (result.boolean)

			set_opt(&ctx->opt, POSIX_ACL);

			set_opt(&sbi->opt, POSIX_ACL);

		else

			clear_opt(&ctx->opt, POSIX_ACL);

			clear_opt(&sbi->opt, POSIX_ACL);

#else

		errorfc(fc, "{,no}acl options not supported");

#endif

		break;

	case Opt_cache_strategy:

#ifdef CONFIG_EROFS_FS_ZIP

		ctx->opt.cache_strategy = result.uint_32;

		sbi->opt.cache_strategy = result.uint_32;

#else

		errorfc(fc, "compression not supported, cache_strategy ignored");

#endif
@@ -502,27 +502,27 @@ static int erofs_fc_parse_param(struct fs_context *fc, 
			kfree(dif);

			return -ENOMEM;

		}

		down_write(&ctx->devs->rwsem);

		ret = idr_alloc(&ctx->devs->tree, dif, 0, 0, GFP_KERNEL);

		up_write(&ctx->devs->rwsem);

		down_write(&sbi->devs->rwsem);

		ret = idr_alloc(&sbi->devs->tree, dif, 0, 0, GFP_KERNEL);

		up_write(&sbi->devs->rwsem);

		if (ret < 0) {

			kfree(dif->path);

			kfree(dif);

			return ret;

		}

		++ctx->devs->extra_devices;

		++sbi->devs->extra_devices;

		break;

#ifdef CONFIG_EROFS_FS_ONDEMAND

	case Opt_fsid:

		kfree(ctx->fsid);

		ctx->fsid = kstrdup(param->string, GFP_KERNEL);

		if (!ctx->fsid)

		kfree(sbi->fsid);

		sbi->fsid = kstrdup(param->string, GFP_KERNEL);

		if (!sbi->fsid)

			return -ENOMEM;

		break;

	case Opt_domain_id:

		kfree(ctx->domain_id);

		ctx->domain_id = kstrdup(param->string, GFP_KERNEL);

		if (!ctx->domain_id)

		kfree(sbi->domain_id);

		sbi->domain_id = kstrdup(param->string, GFP_KERNEL);

		if (!sbi->domain_id)

			return -ENOMEM;

		break;

#else
@@ -578,8 +578,7 @@ static const struct export_operations erofs_export_ops = { 
static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc)

{

	struct inode *inode;

	struct erofs_sb_info *sbi;

	struct erofs_fs_context *ctx = fc->fs_private;

	struct erofs_sb_info *sbi = EROFS_SB(sb);

	int err;



	sb->s_magic = EROFS_SUPER_MAGIC;
@@ -587,19 +586,6 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) 
	sb->s_maxbytes = MAX_LFS_FILESIZE;

	sb->s_op = &erofs_sops;



	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);

	if (!sbi)

		return -ENOMEM;



	sb->s_fs_info = sbi;

	sbi->opt = ctx->opt;

	sbi->devs = ctx->devs;

	ctx->devs = NULL;

	sbi->fsid = ctx->fsid;

	ctx->fsid = NULL;

	sbi->domain_id = ctx->domain_id;

	ctx->domain_id = NULL;



	sbi->blkszbits = PAGE_SHIFT;

	if (erofs_is_fscache_mode(sb)) {

		sb->s_blocksize = PAGE_SIZE;
@@ -703,9 +689,9 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) 


static int erofs_fc_get_tree(struct fs_context *fc)

{

	struct erofs_fs_context *ctx = fc->fs_private;

	struct erofs_sb_info *sbi = fc->s_fs_info;



	if (IS_ENABLED(CONFIG_EROFS_FS_ONDEMAND) && ctx->fsid)

	if (IS_ENABLED(CONFIG_EROFS_FS_ONDEMAND) && sbi->fsid)

		return get_tree_nodev(fc, erofs_fc_fill_super);



	return get_tree_bdev(fc, erofs_fc_fill_super);
@@ -715,19 +701,19 @@ static int erofs_fc_reconfigure(struct fs_context *fc) 
{

	struct super_block *sb = fc->root->d_sb;

	struct erofs_sb_info *sbi = EROFS_SB(sb);

	struct erofs_fs_context *ctx = fc->fs_private;

	struct erofs_sb_info *new_sbi = fc->s_fs_info;



	DBG_BUGON(!sb_rdonly(sb));



	if (ctx->fsid || ctx->domain_id)

	if (new_sbi->fsid || new_sbi->domain_id)

		erofs_info(sb, "ignoring reconfiguration for fsid|domain_id.");



	if (test_opt(&ctx->opt, POSIX_ACL))

	if (test_opt(&new_sbi->opt, POSIX_ACL))

		fc->sb_flags |= SB_POSIXACL;

	else

		fc->sb_flags &= ~SB_POSIXACL;



	sbi->opt = ctx->opt;

	sbi->opt = new_sbi->opt;



	fc->sb_flags |= SB_RDONLY;

	return 0;
@@ -758,12 +744,15 @@ static void erofs_free_dev_context(struct erofs_dev_context *devs) 


static void erofs_fc_free(struct fs_context *fc)

{

	struct erofs_fs_context *ctx = fc->fs_private;

	struct erofs_sb_info *sbi = fc->s_fs_info;



	erofs_free_dev_context(ctx->devs);

	kfree(ctx->fsid);

	kfree(ctx->domain_id);

	kfree(ctx);

	if (!sbi)

		return;



	erofs_free_dev_context(sbi->devs);

	kfree(sbi->fsid);

	kfree(sbi->domain_id);

	kfree(sbi);

}



static const struct fs_context_operations erofs_context_ops = {
@@ -775,21 +764,22 @@ static const struct fs_context_operations erofs_context_ops = { 


static int erofs_init_fs_context(struct fs_context *fc)

{

	struct erofs_fs_context *ctx;

	struct erofs_sb_info *sbi;



	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);

	if (!ctx)

	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);

	if (!sbi)

		return -ENOMEM;

	ctx->devs = kzalloc(sizeof(struct erofs_dev_context), GFP_KERNEL);

	if (!ctx->devs) {

		kfree(ctx);



	sbi->devs = kzalloc(sizeof(struct erofs_dev_context), GFP_KERNEL);

	if (!sbi->devs) {

		kfree(sbi);

		return -ENOMEM;

	}

	fc->fs_private = ctx;

	fc->s_fs_info = sbi;



	idr_init(&ctx->devs->tree);

	init_rwsem(&ctx->devs->rwsem);

	erofs_default_options(ctx);

	idr_init(&sbi->devs->tree);

	init_rwsem(&sbi->devs->rwsem);

	erofs_default_options(sbi);

	fc->ops = &erofs_context_ops;

	return 0;

}