Implement the ability to enable or disable the ACLs feature through mount options. "-o acl" option means enable and "-o noacl" means disable and it is enable by default. Signed-off-by: Li Zetao <lizetao1@xxxxxxxxxx> --- v1 -> v2: * Remove redundant assignments to mount.acl. * Added the description of acl mount options in ubifs.rst. v1: https://lore.kernel.org/all/20240319161646.2153867-5-lizetao1@xxxxxxxxxx/ Documentation/filesystems/ubifs.rst | 4 +++ fs/ubifs/super.c | 41 +++++++++++++++++++++++++++++ fs/ubifs/ubifs.h | 2 ++ 3 files changed, 47 insertions(+) diff --git a/Documentation/filesystems/ubifs.rst b/Documentation/filesystems/ubifs.rst index ced2f7679ddb..f9615104d7a3 100644 --- a/Documentation/filesystems/ubifs.rst +++ b/Documentation/filesystems/ubifs.rst @@ -105,6 +105,10 @@ auth_key= specify the key used for authenticating the filesystem. auth_hash_name= The hash algorithm used for authentication. Used for both hashing and for creating HMACs. Typical values include "sha256" or "sha512" +noacl This option disables POSIX Access Control List support. If ACL support + is enabled in the kernel configuration (CONFIG_EXT4_FS_POSIX_ACL), ACL + is enabled by default on mount. See the acl(5) manual page for more + information about acl. ==================== ======================================================= diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 291583005dd1..53ea58ab83f5 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -457,6 +457,13 @@ static int ubifs_show_options(struct seq_file *s, struct dentry *root) seq_printf(s, ",assert=%s", ubifs_assert_action_name(c)); seq_printf(s, ",ubi=%d,vol=%d", c->vi.ubi_num, c->vi.vol_id); +#ifdef CONFIG_UBIFS_FS_POSIX_ACL + if (c->mount_opts.acl == 2) + seq_puts(s, ",acl"); + else if (c->mount_opts.acl == 1) + seq_puts(s, ",noacl"); +#endif + return 0; } @@ -967,6 +974,8 @@ static int check_volume_empty(struct ubifs_info *c) * Opt_assert: set ubifs_assert() action * Opt_auth_key: The key name used for authentication * Opt_auth_hash_name: The hash type used for authentication + * Opt_acl: enable posix acl + * Opt_noacl: disable posix acl * Opt_err: just end of array marker */ enum { @@ -981,6 +990,8 @@ enum { Opt_auth_key, Opt_auth_hash_name, Opt_ignore, + Opt_acl, + Opt_noacl, Opt_err, }; @@ -997,6 +1008,8 @@ static const match_table_t tokens = { {Opt_ignore, "ubi=%s"}, {Opt_ignore, "vol=%s"}, {Opt_assert, "assert=%s"}, + {Opt_acl, "acl"}, + {Opt_noacl, "noacl"}, {Opt_err, NULL}, }; @@ -1137,6 +1150,21 @@ static int ubifs_parse_options(struct ubifs_info *c, char *options, break; case Opt_ignore: break; +#ifdef CONFIG_UBIFS_FS_POSIX_ACL + case Opt_acl: + c->mount_opts.acl = 2; + break; + case Opt_noacl: + c->mount_opts.acl = 1; + break; +#else + case Opt_acl: + ubifs_err(c, "acl options not supported"); + return -EINVAL; + case Opt_noacl: + ubifs_err(c, "noacl options not supported"); + return -EINVAL; +#endif default: { unsigned long flag; @@ -2017,6 +2045,12 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data) return err; } +#ifdef CONFIG_UBIFS_FS_POSIX_ACL + if (c->mount_opts.acl == 1) + c->vfs_sb->s_flags &= ~SB_POSIXACL; + else + c->vfs_sb->s_flags |= SB_POSIXACL; +#endif if (c->ro_mount && !(*flags & SB_RDONLY)) { if (c->ro_error) { ubifs_msg(c, "cannot re-mount R/W due to prior errors"); @@ -2199,6 +2233,13 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent) if (err) goto out_close; +#ifdef CONFIG_UBIFS_FS_POSIX_ACL + if (c->mount_opts.acl == 1) + c->vfs_sb->s_flags &= ~SB_POSIXACL; + else + c->vfs_sb->s_flags |= SB_POSIXACL; +#endif + /* * UBIFS provides 'backing_dev_info' in order to disable read-ahead. For * UBIFS, I/O is not deferred, it is done immediately in read_folio, diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index b96c2462237a..731f433ded68 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -956,6 +956,7 @@ struct ubifs_orphan { * specified in @compr_type) * @compr_type: compressor type to override the superblock compressor with * (%UBIFS_COMPR_NONE, etc) + * @acl: enable/disable posix acl (%0 default, %1 disable, %2 enable) */ struct ubifs_mount_opts { unsigned int unmount_mode:2; @@ -963,6 +964,7 @@ struct ubifs_mount_opts { unsigned int chk_data_crc:2; unsigned int override_compr:1; unsigned int compr_type:2; + unsigned int acl:2; }; /** -- 2.34.1
