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-rw-r--r--fs/erofs/internal.h27
-rw-r--r--fs/erofs/super.c253
-rw-r--r--fs/erofs/xattr.c4
-rw-r--r--fs/erofs/zdata.c4
4 files changed, 132 insertions, 156 deletions
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index 5eead7fdc7a6..1c077b7bb43d 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -46,6 +46,17 @@ typedef u64 erofs_off_t;
/* data type for filesystem-wide blocks number */
typedef u32 erofs_blk_t;
+struct erofs_fs_context {
+#ifdef CONFIG_EROFS_FS_ZIP
+ /* current strategy of how to use managed cache */
+ unsigned char cache_strategy;
+
+ /* threshold for decompression synchronously */
+ unsigned int max_sync_decompress_pages;
+#endif
+ unsigned int mount_opt;
+};
+
struct erofs_sb_info {
#ifdef CONFIG_EROFS_FS_ZIP
/* list for all registered superblocks, mainly for shrinker */
@@ -55,14 +66,8 @@ struct erofs_sb_info {
/* managed XArray arranged in physical block number */
struct xarray managed_pslots;
- /* threshold for decompression synchronously */
- unsigned int max_sync_decompress_pages;
-
unsigned int shrinker_run_no;
- /* current strategy of how to use managed cache */
- unsigned char cache_strategy;
-
/* pseudo inode to manage cached pages */
struct inode *managed_cache;
#endif /* CONFIG_EROFS_FS_ZIP */
@@ -88,7 +93,7 @@ struct erofs_sb_info {
u32 feature_compat;
u32 feature_incompat;
- unsigned int mount_opt;
+ struct erofs_fs_context ctx; /* options */
};
#define EROFS_SB(sb) ((struct erofs_sb_info *)(sb)->s_fs_info)
@@ -98,17 +103,17 @@ struct erofs_sb_info {
#define EROFS_MOUNT_XATTR_USER 0x00000010
#define EROFS_MOUNT_POSIX_ACL 0x00000020
-#define clear_opt(sbi, option) ((sbi)->mount_opt &= ~EROFS_MOUNT_##option)
-#define set_opt(sbi, option) ((sbi)->mount_opt |= EROFS_MOUNT_##option)
-#define test_opt(sbi, option) ((sbi)->mount_opt & EROFS_MOUNT_##option)
+#define clear_opt(ctx, option) ((ctx)->mount_opt &= ~EROFS_MOUNT_##option)
+#define set_opt(ctx, option) ((ctx)->mount_opt |= EROFS_MOUNT_##option)
+#define test_opt(ctx, option) ((ctx)->mount_opt & EROFS_MOUNT_##option)
-#ifdef CONFIG_EROFS_FS_ZIP
enum {
EROFS_ZIP_CACHE_DISABLED,
EROFS_ZIP_CACHE_READAHEAD,
EROFS_ZIP_CACHE_READAROUND
};
+#ifdef CONFIG_EROFS_FS_ZIP
#define EROFS_LOCKED_MAGIC (INT_MIN | 0xE0F510CCL)
/* basic unit of the workstation of a super_block */
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 8e46d204a0c2..7a13ffb07c23 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -10,6 +10,8 @@
#include <linux/parser.h>
#include <linux/seq_file.h>
#include <linux/crc32c.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
#include "xattr.h"
#define CREATE_TRACE_POINTS
@@ -192,53 +194,18 @@ out:
return ret;
}
-#ifdef CONFIG_EROFS_FS_ZIP
-static int erofs_build_cache_strategy(struct super_block *sb,
- substring_t *args)
-{
- struct erofs_sb_info *sbi = EROFS_SB(sb);
- const char *cs = match_strdup(args);
- int err = 0;
-
- if (!cs) {
- erofs_err(sb, "Not enough memory to store cache strategy");
- return -ENOMEM;
- }
-
- if (!strcmp(cs, "disabled")) {
- sbi->cache_strategy = EROFS_ZIP_CACHE_DISABLED;
- } else if (!strcmp(cs, "readahead")) {
- sbi->cache_strategy = EROFS_ZIP_CACHE_READAHEAD;
- } else if (!strcmp(cs, "readaround")) {
- sbi->cache_strategy = EROFS_ZIP_CACHE_READAROUND;
- } else {
- erofs_err(sb, "Unrecognized cache strategy \"%s\"", cs);
- err = -EINVAL;
- }
- kfree(cs);
- return err;
-}
-#else
-static int erofs_build_cache_strategy(struct super_block *sb,
- substring_t *args)
-{
- erofs_info(sb, "EROFS compression is disabled, so cache strategy is ignored");
- return 0;
-}
-#endif
-
/* set up default EROFS parameters */
-static void erofs_default_options(struct erofs_sb_info *sbi)
+static void erofs_default_options(struct erofs_fs_context *ctx)
{
#ifdef CONFIG_EROFS_FS_ZIP
- sbi->cache_strategy = EROFS_ZIP_CACHE_READAROUND;
- sbi->max_sync_decompress_pages = 3;
+ ctx->cache_strategy = EROFS_ZIP_CACHE_READAROUND;
+ ctx->max_sync_decompress_pages = 3;
#endif
#ifdef CONFIG_EROFS_FS_XATTR
- set_opt(sbi, XATTR_USER);
+ set_opt(ctx, XATTR_USER);
#endif
#ifdef CONFIG_EROFS_FS_POSIX_ACL
- set_opt(sbi, POSIX_ACL);
+ set_opt(ctx, POSIX_ACL);
#endif
}
@@ -251,73 +218,62 @@ enum {
Opt_err
};
-static match_table_t erofs_tokens = {
- {Opt_user_xattr, "user_xattr"},
- {Opt_nouser_xattr, "nouser_xattr"},
- {Opt_acl, "acl"},
- {Opt_noacl, "noacl"},
- {Opt_cache_strategy, "cache_strategy=%s"},
- {Opt_err, NULL}
+static const struct constant_table erofs_param_cache_strategy[] = {
+ {"disabled", EROFS_ZIP_CACHE_DISABLED},
+ {"readahead", EROFS_ZIP_CACHE_READAHEAD},
+ {"readaround", EROFS_ZIP_CACHE_READAROUND},
+ {}
};
-static int erofs_parse_options(struct super_block *sb, char *options)
-{
- substring_t args[MAX_OPT_ARGS];
- char *p;
- int err;
-
- if (!options)
- return 0;
-
- while ((p = strsep(&options, ","))) {
- int token;
+static const struct fs_parameter_spec erofs_fs_parameters[] = {
+ fsparam_flag_no("user_xattr", Opt_user_xattr),
+ fsparam_flag_no("acl", Opt_acl),
+ fsparam_enum("cache_strategy", Opt_cache_strategy,
+ erofs_param_cache_strategy),
+ {}
+};
- if (!*p)
- continue;
+static int erofs_fc_parse_param(struct fs_context *fc,
+ struct fs_parameter *param)
+{
+ struct erofs_fs_context *ctx __maybe_unused = fc->fs_private;
+ struct fs_parse_result result;
+ int opt;
- args[0].to = args[0].from = NULL;
- token = match_token(p, erofs_tokens, args);
+ opt = fs_parse(fc, erofs_fs_parameters, param, &result);
+ if (opt < 0)
+ return opt;
- switch (token) {
+ switch (opt) {
+ case Opt_user_xattr:
#ifdef CONFIG_EROFS_FS_XATTR
- case Opt_user_xattr:
- set_opt(EROFS_SB(sb), XATTR_USER);
- break;
- case Opt_nouser_xattr:
- clear_opt(EROFS_SB(sb), XATTR_USER);
- break;
+ if (result.boolean)
+ set_opt(ctx, XATTR_USER);
+ else
+ clear_opt(ctx, XATTR_USER);
#else
- case Opt_user_xattr:
- erofs_info(sb, "user_xattr options not supported");
- break;
- case Opt_nouser_xattr:
- erofs_info(sb, "nouser_xattr options not supported");
- break;
+ errorfc(fc, "{,no}user_xattr options not supported");
#endif
+ break;
+ case Opt_acl:
#ifdef CONFIG_EROFS_FS_POSIX_ACL
- case Opt_acl:
- set_opt(EROFS_SB(sb), POSIX_ACL);
- break;
- case Opt_noacl:
- clear_opt(EROFS_SB(sb), POSIX_ACL);
- break;
+ if (result.boolean)
+ set_opt(ctx, POSIX_ACL);
+ else
+ clear_opt(ctx, POSIX_ACL);
#else
- case Opt_acl:
- erofs_info(sb, "acl options not supported");
- break;
- case Opt_noacl:
- erofs_info(sb, "noacl options not supported");
- break;
+ errorfc(fc, "{,no}acl options not supported");
#endif
- case Opt_cache_strategy:
- err = erofs_build_cache_strategy(sb, args);
- if (err)
- return err;
- break;
- default:
- erofs_err(sb, "Unrecognized mount option \"%s\" or missing value", p);
- return -EINVAL;
- }
+ break;
+ case Opt_cache_strategy:
+#ifdef CONFIG_EROFS_FS_ZIP
+ ctx->cache_strategy = result.uint_32;
+#else
+ errorfc(fc, "compression not supported, cache_strategy ignored");
+#endif
+ break;
+ default:
+ return -ENOPARAM;
}
return 0;
}
@@ -381,10 +337,11 @@ static int erofs_init_managed_cache(struct super_block *sb)
static int erofs_init_managed_cache(struct super_block *sb) { return 0; }
#endif
-static int erofs_fill_super(struct super_block *sb, void *data, int silent)
+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;
int err;
sb->s_magic = EROFS_SUPER_MAGIC;
@@ -410,18 +367,13 @@ static int erofs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_op = &erofs_sops;
sb->s_xattr = erofs_xattr_handlers;
- /* set erofs default mount options */
- erofs_default_options(sbi);
-
- err = erofs_parse_options(sb, data);
- if (err)
- return err;
-
- if (test_opt(sbi, POSIX_ACL))
+ if (test_opt(ctx, POSIX_ACL))
sb->s_flags |= SB_POSIXACL;
else
sb->s_flags &= ~SB_POSIXACL;
+ sbi->ctx = *ctx;
+
#ifdef CONFIG_EROFS_FS_ZIP
xa_init(&sbi->managed_pslots);
#endif
@@ -448,15 +400,58 @@ static int erofs_fill_super(struct super_block *sb, void *data, int silent)
if (err)
return err;
- erofs_info(sb, "mounted with opts: %s, root inode @ nid %llu.",
- (char *)data, ROOT_NID(sbi));
+ erofs_info(sb, "mounted with root inode @ nid %llu.", ROOT_NID(sbi));
+ return 0;
+}
+
+static int erofs_fc_get_tree(struct fs_context *fc)
+{
+ return get_tree_bdev(fc, erofs_fc_fill_super);
+}
+
+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;
+
+ DBG_BUGON(!sb_rdonly(sb));
+
+ if (test_opt(ctx, POSIX_ACL))
+ fc->sb_flags |= SB_POSIXACL;
+ else
+ fc->sb_flags &= ~SB_POSIXACL;
+
+ sbi->ctx = *ctx;
+
+ fc->sb_flags |= SB_RDONLY;
return 0;
}
-static struct dentry *erofs_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+static void erofs_fc_free(struct fs_context *fc)
+{
+ kfree(fc->fs_private);
+}
+
+static const struct fs_context_operations erofs_context_ops = {
+ .parse_param = erofs_fc_parse_param,
+ .get_tree = erofs_fc_get_tree,
+ .reconfigure = erofs_fc_reconfigure,
+ .free = erofs_fc_free,
+};
+
+static int erofs_init_fs_context(struct fs_context *fc)
{
- return mount_bdev(fs_type, flags, dev_name, data, erofs_fill_super);
+ fc->fs_private = kzalloc(sizeof(struct erofs_fs_context), GFP_KERNEL);
+ if (!fc->fs_private)
+ return -ENOMEM;
+
+ /* set default mount options */
+ erofs_default_options(fc->fs_private);
+
+ fc->ops = &erofs_context_ops;
+
+ return 0;
}
/*
@@ -495,7 +490,7 @@ static void erofs_put_super(struct super_block *sb)
static struct file_system_type erofs_fs_type = {
.owner = THIS_MODULE,
.name = "erofs",
- .mount = erofs_mount,
+ .init_fs_context = erofs_init_fs_context,
.kill_sb = erofs_kill_sb,
.fs_flags = FS_REQUIRES_DEV,
};
@@ -576,61 +571,37 @@ static int erofs_statfs(struct dentry *dentry, struct kstatfs *buf)
static int erofs_show_options(struct seq_file *seq, struct dentry *root)
{
struct erofs_sb_info *sbi __maybe_unused = EROFS_SB(root->d_sb);
+ struct erofs_fs_context *ctx __maybe_unused = &sbi->ctx;
#ifdef CONFIG_EROFS_FS_XATTR
- if (test_opt(sbi, XATTR_USER))
+ if (test_opt(ctx, XATTR_USER))
seq_puts(seq, ",user_xattr");
else
seq_puts(seq, ",nouser_xattr");
#endif
#ifdef CONFIG_EROFS_FS_POSIX_ACL
- if (test_opt(sbi, POSIX_ACL))
+ if (test_opt(ctx, POSIX_ACL))
seq_puts(seq, ",acl");
else
seq_puts(seq, ",noacl");
#endif
#ifdef CONFIG_EROFS_FS_ZIP
- if (sbi->cache_strategy == EROFS_ZIP_CACHE_DISABLED) {
+ if (ctx->cache_strategy == EROFS_ZIP_CACHE_DISABLED)
seq_puts(seq, ",cache_strategy=disabled");
- } else if (sbi->cache_strategy == EROFS_ZIP_CACHE_READAHEAD) {
+ else if (ctx->cache_strategy == EROFS_ZIP_CACHE_READAHEAD)
seq_puts(seq, ",cache_strategy=readahead");
- } else if (sbi->cache_strategy == EROFS_ZIP_CACHE_READAROUND) {
+ else if (ctx->cache_strategy == EROFS_ZIP_CACHE_READAROUND)
seq_puts(seq, ",cache_strategy=readaround");
- }
#endif
return 0;
}
-static int erofs_remount(struct super_block *sb, int *flags, char *data)
-{
- struct erofs_sb_info *sbi = EROFS_SB(sb);
- unsigned int org_mnt_opt = sbi->mount_opt;
- int err;
-
- DBG_BUGON(!sb_rdonly(sb));
- err = erofs_parse_options(sb, data);
- if (err)
- goto out;
-
- if (test_opt(sbi, POSIX_ACL))
- sb->s_flags |= SB_POSIXACL;
- else
- sb->s_flags &= ~SB_POSIXACL;
-
- *flags |= SB_RDONLY;
- return 0;
-out:
- sbi->mount_opt = org_mnt_opt;
- return err;
-}
-
const struct super_operations erofs_sops = {
.put_super = erofs_put_super,
.alloc_inode = erofs_alloc_inode,
.free_inode = erofs_free_inode,
.statfs = erofs_statfs,
.show_options = erofs_show_options,
- .remount_fs = erofs_remount,
};
module_init(erofs_module_init);
diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c
index b766c3ee5fa8..87e437e7b34f 100644
--- a/fs/erofs/xattr.c
+++ b/fs/erofs/xattr.c
@@ -422,7 +422,7 @@ static int shared_getxattr(struct inode *inode, struct getxattr_iter *it)
static bool erofs_xattr_user_list(struct dentry *dentry)
{
- return test_opt(EROFS_SB(dentry->d_sb), XATTR_USER);
+ return test_opt(&EROFS_SB(dentry->d_sb)->ctx, XATTR_USER);
}
static bool erofs_xattr_trusted_list(struct dentry *dentry)
@@ -469,7 +469,7 @@ static int erofs_xattr_generic_get(const struct xattr_handler *handler,
switch (handler->flags) {
case EROFS_XATTR_INDEX_USER:
- if (!test_opt(sbi, XATTR_USER))
+ if (!test_opt(&sbi->ctx, XATTR_USER))
return -EOPNOTSUPP;
break;
case EROFS_XATTR_INDEX_TRUSTED:
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index c4b6c9aa87ec..5086b1218aac 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -615,7 +615,7 @@ restart_now:
goto err_out;
/* preload all compressed pages (maybe downgrade role if necessary) */
- if (should_alloc_managed_pages(fe, sbi->cache_strategy, map->m_la))
+ if (should_alloc_managed_pages(fe, sbi->ctx.cache_strategy, map->m_la))
cache_strategy = DELAYEDALLOC;
else
cache_strategy = DONTALLOC;
@@ -1302,7 +1302,7 @@ static int z_erofs_readpage(struct file *file, struct page *page)
static bool should_decompress_synchronously(struct erofs_sb_info *sbi,
unsigned int nr)
{
- return nr <= sbi->max_sync_decompress_pages;
+ return nr <= sbi->ctx.max_sync_decompress_pages;
}
static int z_erofs_readpages(struct file *filp, struct address_space *mapping,
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 05:19:44 +0000