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erofs: get rid of erofs_fs_context

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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: Jingbo Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20240419123611.947084-2-libaokun1@huawei.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
This commit is contained in:
Baokun Li 2024-04-19 20:36:10 +08:00 committed by Gao Xiang
parent 17597b1e18
commit 07abe43a28
2 changed files with 53 additions and 70 deletions
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7
fs/erofs/internal.h
View file

@ -84,13 +84,6 @@ 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 */

116
fs/erofs/super.c
View file

@ -370,18 +370,18 @@ 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
}
@ -426,16 +426,16 @@ 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:
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);
@ -450,7 +450,7 @@ 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;
@ -463,9 +463,9 @@ 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
@ -473,16 +473,16 @@ 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
@ -504,27 +504,27 @@ 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
@ -581,8 +581,7 @@ 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;
@ -590,19 +589,6 @@ 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;
@ -706,9 +692,9 @@ 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);
@ -718,19 +704,19 @@ 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;
@ -761,12 +747,15 @@ 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 = {
@ -778,21 +767,22 @@ 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;
}