| Message ID | 20240319161646.2153867-5-lizetao1@huawei.com |
|---|---|
| State | New |
| Headers | show |
| Series | ubifs: Support POSIX Access Control Lists (ACLs) | expand |
在 2024/3/20 0:16, Li Zetao 写道: > 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@huawei.com> > --- > fs/ubifs/super.c | 40 ++++++++++++++++++++++++++++++++++++++++ > fs/ubifs/ubifs.h | 2 ++ > 2 files changed, 42 insertions(+) > > diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c > index 7f4031a15f4d..ed03bf11e51d 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 This config is introduced in pacth 5, we cannot use it in patch 4. > + 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, It would be better to update Documentation/filesystems/ubifs.rst to describe new mount options > 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 +1150,23 @@ 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; > + c->vfs_sb->s_flags |= SB_POSIXACL; > + break; > + case Opt_noacl: > + c->mount_opts.acl = 1; > + c->vfs_sb->s_flags &= ~SB_POSIXACL; > + 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; > @@ -2011,12 +2041,17 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data) > sync_filesystem(sb); > dbg_gen("old flags %#lx, new flags %#x", sb->s_flags, *flags); > > + c->mount_opts.acl = 0; > err = ubifs_parse_options(c, data, 1); 1. mount -onoacl /dev/ubi0_0 /mnt # After that, mount will show 'noacl' option 2. mount -oremount,xxx /dev/ubi0_0 /mnt If 'xxx' has nothing to do with acl, c->mount_opts.acl is set as '0'. Then superblock flag is assigned with 'SB_POSIXACL' and mount will not display 'nocal'. Will it make user confused? > if (err) { > ubifs_err(c, "invalid or unknown remount parameter"); > return err; > } > > +#ifdef CONFIG_UBIFS_FS_POSIX_ACL > + if (!c->mount_opts.acl) > + 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"); > @@ -2197,6 +2232,11 @@ 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) > + 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 b0d3b076290d..4a6078cbb2f5 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; > }; > > /** >
Hi, On 2024/3/21 14:49, Zhihao Cheng wrote: > 在 2024/3/20 0:16, Li Zetao 写道: >> 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@huawei.com> >> --- >> fs/ubifs/super.c | 40 ++++++++++++++++++++++++++++++++++++++++ >> fs/ubifs/ubifs.h | 2 ++ >> 2 files changed, 42 insertions(+) >> >> diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c >> index 7f4031a15f4d..ed03bf11e51d 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 > > This config is introduced in pacth 5, we cannot use it in patch 4. >> + 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, > It would be better to update Documentation/filesystems/ubifs.rst to > describe new mount options Ok. >> 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 +1150,23 @@ 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; >> + c->vfs_sb->s_flags |= SB_POSIXACL; >> + break; >> + case Opt_noacl: >> + c->mount_opts.acl = 1; >> + c->vfs_sb->s_flags &= ~SB_POSIXACL; >> + 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; >> @@ -2011,12 +2041,17 @@ static int ubifs_remount_fs(struct super_block >> *sb, int *flags, char *data) >> sync_filesystem(sb); >> dbg_gen("old flags %#lx, new flags %#x", sb->s_flags, *flags); >> + c->mount_opts.acl = 0; >> err = ubifs_parse_options(c, data, 1); > > 1. mount -onoacl /dev/ubi0_0 /mnt # After that, mount will show 'noacl' > option > 2. mount -oremount,xxx /dev/ubi0_0 /mnt > If 'xxx' has nothing to do with acl, c->mount_opts.acl is set as '0'. > Then superblock flag is assigned with 'SB_POSIXACL' and mount will not > display 'nocal'. Will it make user confused? I have tested this use case and it works fine. This is because the mount options will be re-parsed during remount, just like the last mount. But this is indeed redundant. I adjusted it to make it more reasonable. >> if (err) { >> ubifs_err(c, "invalid or unknown remount parameter"); >> return err; >> } >> +#ifdef CONFIG_UBIFS_FS_POSIX_ACL >> + if (!c->mount_opts.acl) >> + 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"); >> @@ -2197,6 +2232,11 @@ 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) >> + 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 b0d3b076290d..4a6078cbb2f5 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; >> }; >> /** >> >
在 2024/3/22 20:05, Li Zetao 写道: > Hi, > > On 2024/3/21 14:49, Zhihao Cheng wrote: >> 在 2024/3/20 0:16, Li Zetao 写道: >>> 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@huawei.com> [...] >>> @@ -2011,12 +2041,17 @@ static int ubifs_remount_fs(struct >>> super_block *sb, int *flags, char *data) >>> sync_filesystem(sb); >>> dbg_gen("old flags %#lx, new flags %#x", sb->s_flags, *flags); >>> + c->mount_opts.acl = 0; >>> err = ubifs_parse_options(c, data, 1); >> >> 1. mount -onoacl /dev/ubi0_0 /mnt # After that, mount will show >> 'noacl' option >> 2. mount -oremount,xxx /dev/ubi0_0 /mnt >> If 'xxx' has nothing to do with acl, c->mount_opts.acl is set as '0'. >> Then superblock flag is assigned with 'SB_POSIXACL' and mount will not >> display 'nocal'. Will it make user confused? > I have tested this use case and it works fine. This is because the mount > options will be re-parsed during remount, just like the last mount. But > this is indeed redundant. I adjusted it to make it more reasonable. Yes, parameter 'data' carries old mount information. Removing the redundant assignment is fine.
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 7f4031a15f4d..ed03bf11e51d 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 +1150,23 @@ 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; + c->vfs_sb->s_flags |= SB_POSIXACL; + break; + case Opt_noacl: + c->mount_opts.acl = 1; + c->vfs_sb->s_flags &= ~SB_POSIXACL; + 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; @@ -2011,12 +2041,17 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data) sync_filesystem(sb); dbg_gen("old flags %#lx, new flags %#x", sb->s_flags, *flags); + c->mount_opts.acl = 0; err = ubifs_parse_options(c, data, 1); if (err) { ubifs_err(c, "invalid or unknown remount parameter"); return err; } +#ifdef CONFIG_UBIFS_FS_POSIX_ACL + if (!c->mount_opts.acl) + 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"); @@ -2197,6 +2232,11 @@ 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) + 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 b0d3b076290d..4a6078cbb2f5 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; }; /**
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@huawei.com> --- fs/ubifs/super.c | 40 ++++++++++++++++++++++++++++++++++++++++ fs/ubifs/ubifs.h | 2 ++ 2 files changed, 42 insertions(+)