Re: [PATCH 08/18] ext2/3/4: use generic posix ACL infrastructure

Jan Kara
2013-12-02T22:13:45Z

On Sun 01-12-13 03:59:11, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Looks good. You can add:
Reviewed-by: Jan Kara <jack@suse.cz>

Honza

> ---
> fs/ext2/acl.c | 176 ++++-----------------------------------------
> fs/ext2/acl.h | 8 +--
> fs/ext2/file.c | 1 +
> fs/ext2/inode.c | 2 +-
> fs/ext2/namei.c | 2 +
> fs/ext2/xattr.c | 8 +--
> fs/ext2/xattr.h | 2 -
> fs/ext3/acl.c | 213 ++++++++-----------------------------------------------
> fs/ext3/acl.h | 9 +--
> fs/ext3/file.c | 1 +
> fs/ext3/inode.c | 2 +-
> fs/ext3/namei.c | 2 +
> fs/ext3/xattr.c | 8 +--
> fs/ext3/xattr.h | 2 -
> fs/ext4/acl.c | 213 ++++++++-----------------------------------------------
> fs/ext4/acl.h | 9 +--
> fs/ext4/file.c | 1 +
> fs/ext4/inode.c | 2 +-
> fs/ext4/namei.c | 2 +
> fs/ext4/xattr.c | 8 +--
> fs/ext4/xattr.h | 2 -
> 21 files changed, 100 insertions(+), 573 deletions(-)
>
> diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
> index 6e842a7..f04a295 100644
> --- a/fs/ext2/acl.c
> +++ b/fs/ext2/acl.c
> @@ -189,8 +189,8 @@ ext2_get_acl(struct inode *inode, int type)
> /*
> * inode->i_mutex: down
> */
> -static int
> -ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
> +int
> +ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
> {
> int name_index;
> void *value = NULL;
> @@ -250,169 +250,21 @@ ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
> int
> ext2_init_acl(struct inode *inode, struct inode *dir)
> {
> - struct posix_acl *acl = NULL;
> - int error = 0;
> -
> - if (!S_ISLNK(inode->i_mode)) {
> - if (test_opt(dir->i_sb, POSIX_ACL)) {
> - acl = ext2_get_acl(dir, ACL_TYPE_DEFAULT);
> - if (IS_ERR(acl))
> - return PTR_ERR(acl);
> - }
> - if (!acl)
> - inode->i_mode &= ~current_umask();
> - }
> - if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
> - if (S_ISDIR(inode->i_mode)) {
> - error = ext2_set_acl(inode, ACL_TYPE_DEFAULT, acl);
> - if (error)
> - goto cleanup;
> - }
> - error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
> - if (error < 0)
> - return error;
> - if (error > 0) {
> - /* This is an extended ACL */
> - error = ext2_set_acl(inode, ACL_TYPE_ACCESS, acl);
> - }
> - }
> -cleanup:
> - posix_acl_release(acl);
> - return error;
> -}
> -
> -/*
> - * Does chmod for an inode that may have an Access Control List. The
> - * inode->i_mode field must be updated to the desired value by the caller
> - * before calling this function.
> - * Returns 0 on success, or a negative error number.
> - *
> - * We change the ACL rather than storing some ACL entries in the file
> - * mode permission bits (which would be more efficient), because that
> - * would break once additional permissions (like ACL_APPEND, ACL_DELETE
> - * for directories) are added. There are no more bits available in the
> - * file mode.
> - *
> - * inode->i_mutex: down
> - */
> -int
> -ext2_acl_chmod(struct inode *inode)
> -{
> - struct posix_acl *acl;
> - int error;
> + struct posix_acl *default_acl, *acl;
> + int error;
>
> - if (!test_opt(inode->i_sb, POSIX_ACL))
> - return 0;
> - if (S_ISLNK(inode->i_mode))
> - return -EOPNOTSUPP;
> - acl = ext2_get_acl(inode, ACL_TYPE_ACCESS);
> - if (IS_ERR(acl) || !acl)
> - return PTR_ERR(acl);
> - error = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
> + error = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
> if (error)
> return error;
> - error = ext2_set_acl(inode, ACL_TYPE_ACCESS, acl);
> - posix_acl_release(acl);
> - return error;
> -}
> -
> -/*
> - * Extended attribut handlers
> - */
> -static size_t
> -ext2_xattr_list_acl_access(struct dentry *dentry, char *list, size_t list_size,
> - const char *name, size_t name_len, int type)
> -{
> - const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
> -
> - if (!test_opt(dentry->d_sb, POSIX_ACL))
> - return 0;
> - if (list && size <= list_size)
> - memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
> - return size;
> -}
>
> -static size_t
> -ext2_xattr_list_acl_default(struct dentry *dentry, char *list, size_t list_size,
> - const char *name, size_t name_len, int type)
> -{
> - const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
> -
> - if (!test_opt(dentry->d_sb, POSIX_ACL))
> - return 0;
> - if (list && size <= list_size)
> - memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
> - return size;
> -}
> -
> -static int
> -ext2_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer,
> - size_t size, int type)
> -{
> - struct posix_acl *acl;
> - int error;
> -
> - if (strcmp(name, "") != 0)
> - return -EINVAL;
> - if (!test_opt(dentry->d_sb, POSIX_ACL))
> - return -EOPNOTSUPP;
> -
> - acl = ext2_get_acl(dentry->d_inode, type);
> - if (IS_ERR(acl))
> - return PTR_ERR(acl);
> - if (acl == NULL)
> - return -ENODATA;
> - error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
> - posix_acl_release(acl);
> -
> - return error;
> -}
> -
> -static int
> -ext2_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
> - size_t size, int flags, int type)
> -{
> - struct posix_acl *acl;
> - int error;
> -
> - if (strcmp(name, "") != 0)
> - return -EINVAL;
> - if (!test_opt(dentry->d_sb, POSIX_ACL))
> - return -EOPNOTSUPP;
> - if (!inode_owner_or_capable(dentry->d_inode))
> - return -EPERM;
> -
> - if (value) {
> - acl = posix_acl_from_xattr(&init_user_ns, value, size);
> - if (IS_ERR(acl))
> - return PTR_ERR(acl);
> - else if (acl) {
> - error = posix_acl_valid(acl);
> - if (error)
> - goto release_and_out;
> - }
> - } else
> - acl = NULL;
> -
> - error = ext2_set_acl(dentry->d_inode, type, acl);
> -
> -release_and_out:
> - posix_acl_release(acl);
> + if (default_acl) {
> + error = ext2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
> + posix_acl_release(default_acl);
> + }
> + if (acl) {
> + if (!error)
> + error = ext2_set_acl(inode, acl, ACL_TYPE_ACCESS);
> + posix_acl_release(acl);
> + }
> return error;
> }
> -
> -const struct xattr_handler ext2_xattr_acl_access_handler = {
> - .prefix = POSIX_ACL_XATTR_ACCESS,
> - .flags = ACL_TYPE_ACCESS,
> - .list = ext2_xattr_list_acl_access,
> - .get = ext2_xattr_get_acl,
> - .set = ext2_xattr_set_acl,
> -};
> -
> -const struct xattr_handler ext2_xattr_acl_default_handler = {
> - .prefix = POSIX_ACL_XATTR_DEFAULT,
> - .flags = ACL_TYPE_DEFAULT,
> - .list = ext2_xattr_list_acl_default,
> - .get = ext2_xattr_get_acl,
> - .set = ext2_xattr_set_acl,
> -};
> diff --git a/fs/ext2/acl.h b/fs/ext2/acl.h
> index 503bfb0..44937f9 100644
> --- a/fs/ext2/acl.h
> +++ b/fs/ext2/acl.h
> @@ -55,7 +55,7 @@ static inline int ext2_acl_count(size_t size)
>
> /* acl.c */
> extern struct posix_acl *ext2_get_acl(struct inode *inode, int type);
> -extern int ext2_acl_chmod (struct inode *);
> +extern int ext2_set_acl(struct inode *inode, struct posix_acl *acl, int type);
> extern int ext2_init_acl (struct inode *, struct inode *);
>
> #else
> @@ -63,12 +63,6 @@ extern int ext2_init_acl (struct inode *, struct inode *);
> #define ext2_get_acl NULL
> #define ext2_set_acl NULL
>
> -static inline int
> -ext2_acl_chmod (struct inode *inode)
> -{
> - return 0;
> -}
> -
> static inline int ext2_init_acl (struct inode *inode, struct inode *dir)
> {
> return 0;
> diff --git a/fs/ext2/file.c b/fs/ext2/file.c
> index a5b3a5d..44c36e5 100644
> --- a/fs/ext2/file.c
> +++ b/fs/ext2/file.c
> @@ -103,5 +103,6 @@ const struct inode_operations ext2_file_inode_operations = {
> #endif
> .setattr = ext2_setattr,
> .get_acl = ext2_get_acl,
> + .set_acl = ext2_set_acl,
> .fiemap = ext2_fiemap,
> };
> diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
> index 8a33764..1be8866 100644
> --- a/fs/ext2/inode.c
> +++ b/fs/ext2/inode.c
> @@ -1566,7 +1566,7 @@ int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
> }
> setattr_copy(inode, iattr);
> if (iattr->ia_valid & ATTR_MODE)
> - error = ext2_acl_chmod(inode);
> + error = posix_acl_chmod(inode);
> mark_inode_dirty(inode);
>
> return error;
> diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
> index 256dd5f..c268d0a 100644
> --- a/fs/ext2/namei.c
> +++ b/fs/ext2/namei.c
> @@ -421,6 +421,7 @@ const struct inode_operations ext2_dir_inode_operations = {
> #endif
> .setattr = ext2_setattr,
> .get_acl = ext2_get_acl,
> + .set_acl = ext2_set_acl,
> .tmpfile = ext2_tmpfile,
> };
>
> @@ -433,4 +434,5 @@ const struct inode_operations ext2_special_inode_operations = {
> #endif
> .setattr = ext2_setattr,
> .get_acl = ext2_get_acl,
> + .set_acl = ext2_set_acl,
> };
> diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
> index 2d7557d..9142614 100644
> --- a/fs/ext2/xattr.c
> +++ b/fs/ext2/xattr.c
> @@ -103,8 +103,8 @@ static struct mb_cache *ext2_xattr_cache;
> static const struct xattr_handler *ext2_xattr_handler_map[] = {
> [EXT2_XATTR_INDEX_USER] = &ext2_xattr_user_handler,
> #ifdef CONFIG_EXT2_FS_POSIX_ACL
> - [EXT2_XATTR_INDEX_POSIX_ACL_ACCESS] = &ext2_xattr_acl_access_handler,
> - [EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT] = &ext2_xattr_acl_default_handler,
> + [EXT2_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
> + [EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
> #endif
> [EXT2_XATTR_INDEX_TRUSTED] = &ext2_xattr_trusted_handler,
> #ifdef CONFIG_EXT2_FS_SECURITY
> @@ -116,8 +116,8 @@ const struct xattr_handler *ext2_xattr_handlers[] = {
> &ext2_xattr_user_handler,
> &ext2_xattr_trusted_handler,
> #ifdef CONFIG_EXT2_FS_POSIX_ACL
> - &ext2_xattr_acl_access_handler,
> - &ext2_xattr_acl_default_handler,
> + &posix_acl_access_xattr_handler,
> + &posix_acl_default_xattr_handler,
> #endif
> #ifdef CONFIG_EXT2_FS_SECURITY
> &ext2_xattr_security_handler,
> diff --git a/fs/ext2/xattr.h b/fs/ext2/xattr.h
> index 5e41ccc..60edf29 100644
> --- a/fs/ext2/xattr.h
> +++ b/fs/ext2/xattr.h
> @@ -57,8 +57,6 @@ struct ext2_xattr_entry {
>
> extern const struct xattr_handler ext2_xattr_user_handler;
> extern const struct xattr_handler ext2_xattr_trusted_handler;
> -extern const struct xattr_handler ext2_xattr_acl_access_handler;
> -extern const struct xattr_handler ext2_xattr_acl_default_handler;
> extern const struct xattr_handler ext2_xattr_security_handler;
>
> extern ssize_t ext2_listxattr(struct dentry *, char *, size_t);
> diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
> index 4f3d8fa..e9cb33f 100644
> --- a/fs/ext3/acl.c
> +++ b/fs/ext3/acl.c
> @@ -190,7 +190,7 @@ ext3_get_acl(struct inode *inode, int type)
> * inode->i_mutex: down unless called from ext3_new_inode
> */
> static int
> -ext3_set_acl(handle_t *handle, struct inode *inode, int type,
> +__ext3_set_acl(handle_t *handle, struct inode *inode, int type,
> struct posix_acl *acl)
> {
> int name_index;
> @@ -243,204 +243,49 @@ ext3_set_acl(handle_t *handle, struct inode *inode, int type,
> return error;
> }
>
> -/*
> - * Initialize the ACLs of a new inode. Called from ext3_new_inode.
> - *
> - * dir->i_mutex: down
> - * inode->i_mutex: up (access to inode is still exclusive)
> - */
> -int
> -ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
> -{
> - struct posix_acl *acl = NULL;
> - int error = 0;
> -
> - if (!S_ISLNK(inode->i_mode)) {
> - if (test_opt(dir->i_sb, POSIX_ACL)) {
> - acl = ext3_get_acl(dir, ACL_TYPE_DEFAULT);
> - if (IS_ERR(acl))
> - return PTR_ERR(acl);
> - }
> - if (!acl)
> - inode->i_mode &= ~current_umask();
> - }
> - if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
> - if (S_ISDIR(inode->i_mode)) {
> - error = ext3_set_acl(handle, inode,
> - ACL_TYPE_DEFAULT, acl);
> - if (error)
> - goto cleanup;
> - }
> - error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
> - if (error < 0)
> - return error;
> -
> - if (error > 0) {
> - /* This is an extended ACL */
> - error = ext3_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
> - }
> - }
> -cleanup:
> - posix_acl_release(acl);
> - return error;
> -}
> -
> -/*
> - * Does chmod for an inode that may have an Access Control List. The
> - * inode->i_mode field must be updated to the desired value by the caller
> - * before calling this function.
> - * Returns 0 on success, or a negative error number.
> - *
> - * We change the ACL rather than storing some ACL entries in the file
> - * mode permission bits (which would be more efficient), because that
> - * would break once additional permissions (like ACL_APPEND, ACL_DELETE
> - * for directories) are added. There are no more bits available in the
> - * file mode.
> - *
> - * inode->i_mutex: down
> - */
> int
> -ext3_acl_chmod(struct inode *inode)
> +ext3_set_acl(struct inode *inode, struct posix_acl *acl, int type)
> {
> - struct posix_acl *acl;
> handle_t *handle;
> - int retries = 0;
> - int error;
> + int error, retries = 0;
>
> - if (S_ISLNK(inode->i_mode))
> - return -EOPNOTSUPP;
> - if (!test_opt(inode->i_sb, POSIX_ACL))
> - return 0;
> - acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);
> - if (IS_ERR(acl) || !acl)
> - return PTR_ERR(acl);
> - error = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
> - if (error)
> - return error;
> retry:
> - handle = ext3_journal_start(inode,
> - EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
> - if (IS_ERR(handle)) {
> - error = PTR_ERR(handle);
> - ext3_std_error(inode->i_sb, error);
> - goto out;
> - }
> - error = ext3_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
> + handle = ext3_journal_start(inode, EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
> + if (IS_ERR(handle))
> + return PTR_ERR(handle);
> + error = __ext3_set_acl(handle, inode, type, acl);
> ext3_journal_stop(handle);
> - if (error == -ENOSPC &&
> - ext3_should_retry_alloc(inode->i_sb, &retries))
> + if (error == -ENOSPC && ext3_should_retry_alloc(inode->i_sb, &retries))
> goto retry;
> -out:
> - posix_acl_release(acl);
> return error;
> }
>
> /*
> - * Extended attribute handlers
> + * Initialize the ACLs of a new inode. Called from ext3_new_inode.
> + *
> + * dir->i_mutex: down
> + * inode->i_mutex: up (access to inode is still exclusive)
> */
> -static size_t
> -ext3_xattr_list_acl_access(struct dentry *dentry, char *list, size_t list_len,
> - const char *name, size_t name_len, int type)
> -{
> - const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
> -
> - if (!test_opt(dentry->d_sb, POSIX_ACL))
> - return 0;
> - if (list && size <= list_len)
> - memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
> - return size;
> -}
> -
> -static size_t
> -ext3_xattr_list_acl_default(struct dentry *dentry, char *list, size_t list_len,
> - const char *name, size_t name_len, int type)
> -{
> - const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
> -
> - if (!test_opt(dentry->d_sb, POSIX_ACL))
> - return 0;
> - if (list && size <= list_len)
> - memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
> - return size;
> -}
> -
> -static int
> -ext3_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer,
> - size_t size, int type)
> +int
> +ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
> {
> - struct posix_acl *acl;
> + struct posix_acl *default_acl, *acl;
> int error;
>
> - if (strcmp(name, "") != 0)
> - return -EINVAL;
> - if (!test_opt(dentry->d_sb, POSIX_ACL))
> - return -EOPNOTSUPP;
> -
> - acl = ext3_get_acl(dentry->d_inode, type);
> - if (IS_ERR(acl))
> - return PTR_ERR(acl);
> - if (acl == NULL)
> - return -ENODATA;
> - error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
> - posix_acl_release(acl);
> -
> - return error;
> -}
> -
> -static int
> -ext3_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
> - size_t size, int flags, int type)
> -{
> - struct inode *inode = dentry->d_inode;
> - handle_t *handle;
> - struct posix_acl *acl;
> - int error, retries = 0;
> -
> - if (strcmp(name, "") != 0)
> - return -EINVAL;
> - if (!test_opt(inode->i_sb, POSIX_ACL))
> - return -EOPNOTSUPP;
> - if (!inode_owner_or_capable(inode))
> - return -EPERM;
> -
> - if (value) {
> - acl = posix_acl_from_xattr(&init_user_ns, value, size);
> - if (IS_ERR(acl))
> - return PTR_ERR(acl);
> - else if (acl) {
> - error = posix_acl_valid(acl);
> - if (error)
> - goto release_and_out;
> - }
> - } else
> - acl = NULL;
> -
> -retry:
> - handle = ext3_journal_start(inode, EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
> - if (IS_ERR(handle))
> - return PTR_ERR(handle);
> - error = ext3_set_acl(handle, inode, type, acl);
> - ext3_journal_stop(handle);
> - if (error == -ENOSPC && ext3_should_retry_alloc(inode->i_sb, &retries))
> - goto retry;
> + error = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
> + if (error)
> + return error;
>
> -release_and_out:
> - posix_acl_release(acl);
> + if (default_acl) {
> + error = __ext3_set_acl(handle, inode, ACL_TYPE_DEFAULT,
> + default_acl);
> + posix_acl_release(default_acl);
> + }
> + if (acl) {
> + if (!error)
> + error = __ext3_set_acl(handle, inode, ACL_TYPE_ACCESS,
> + acl);
> + posix_acl_release(acl);
> + }
> return error;
> }
> -
> -const struct xattr_handler ext3_xattr_acl_access_handler = {
> - .prefix = POSIX_ACL_XATTR_ACCESS,
> - .flags = ACL_TYPE_ACCESS,
> - .list = ext3_xattr_list_acl_access,
> - .get = ext3_xattr_get_acl,
> - .set = ext3_xattr_set_acl,
> -};
> -
> -const struct xattr_handler ext3_xattr_acl_default_handler = {
> - .prefix = POSIX_ACL_XATTR_DEFAULT,
> - .flags = ACL_TYPE_DEFAULT,
> - .list = ext3_xattr_list_acl_default,
> - .get = ext3_xattr_get_acl,
> - .set = ext3_xattr_set_acl,
> -};
> diff --git a/fs/ext3/acl.h b/fs/ext3/acl.h
> index dbc921e..ea1c69e 100644
> --- a/fs/ext3/acl.h
> +++ b/fs/ext3/acl.h
> @@ -55,18 +55,13 @@ static inline int ext3_acl_count(size_t size)
>
> /* acl.c */
> extern struct posix_acl *ext3_get_acl(struct inode *inode, int type);
> -extern int ext3_acl_chmod (struct inode *);
> +extern int ext3_set_acl(struct inode *inode, struct posix_acl *acl, int type);
> extern int ext3_init_acl (handle_t *, struct inode *, struct inode *);
>
> #else /* CONFIG_EXT3_FS_POSIX_ACL */
> #include <linux/sched.h>
> #define ext3_get_acl NULL
> -
> -static inline int
> -ext3_acl_chmod(struct inode *inode)
> -{
> - return 0;
> -}
> +#define ext3_set_acl NULL
>
> static inline int
> ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
> diff --git a/fs/ext3/file.c b/fs/ext3/file.c
> index 25cb413..aad0531 100644
> --- a/fs/ext3/file.c
> +++ b/fs/ext3/file.c
> @@ -75,6 +75,7 @@ const struct inode_operations ext3_file_inode_operations = {
> .removexattr = generic_removexattr,
> #endif
> .get_acl = ext3_get_acl,
> + .set_acl = ext3_set_acl,
> .fiemap = ext3_fiemap,
> };
>
> diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
> index 2bd8548..150b6c1 100644
> --- a/fs/ext3/inode.c
> +++ b/fs/ext3/inode.c
> @@ -3365,7 +3365,7 @@ int ext3_setattr(struct dentry *dentry, struct iattr *attr)
> mark_inode_dirty(inode);
>
> if (ia_valid & ATTR_MODE)
> - rc = ext3_acl_chmod(inode);
> + rc = posix_acl_chmod(inode);
>
> err_out:
> ext3_std_error(inode->i_sb, error);
> diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
> index f8cde46..f197736 100644
> --- a/fs/ext3/namei.c
> +++ b/fs/ext3/namei.c
> @@ -2569,6 +2569,7 @@ const struct inode_operations ext3_dir_inode_operations = {
> .removexattr = generic_removexattr,
> #endif
> .get_acl = ext3_get_acl,
> + .set_acl = ext3_set_acl,
> };
>
> const struct inode_operations ext3_special_inode_operations = {
> @@ -2580,4 +2581,5 @@ const struct inode_operations ext3_special_inode_operations = {
> .removexattr = generic_removexattr,
> #endif
> .get_acl = ext3_get_acl,
> + .set_acl = ext3_set_acl,
> };
> diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c
> index b1fc963..c6874be 100644
> --- a/fs/ext3/xattr.c
> +++ b/fs/ext3/xattr.c
> @@ -102,8 +102,8 @@ static struct mb_cache *ext3_xattr_cache;
> static const struct xattr_handler *ext3_xattr_handler_map[] = {
> [EXT3_XATTR_INDEX_USER] = &ext3_xattr_user_handler,
> #ifdef CONFIG_EXT3_FS_POSIX_ACL
> - [EXT3_XATTR_INDEX_POSIX_ACL_ACCESS] = &ext3_xattr_acl_access_handler,
> - [EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT] = &ext3_xattr_acl_default_handler,
> + [EXT3_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
> + [EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
> #endif
> [EXT3_XATTR_INDEX_TRUSTED] = &ext3_xattr_trusted_handler,
> #ifdef CONFIG_EXT3_FS_SECURITY
> @@ -115,8 +115,8 @@ const struct xattr_handler *ext3_xattr_handlers[] = {
> &ext3_xattr_user_handler,
> &ext3_xattr_trusted_handler,
> #ifdef CONFIG_EXT3_FS_POSIX_ACL
> - &ext3_xattr_acl_access_handler,
> - &ext3_xattr_acl_default_handler,
> + &posix_acl_access_xattr_handler,
> + &posix_acl_default_xattr_handler,
> #endif
> #ifdef CONFIG_EXT3_FS_SECURITY
> &ext3_xattr_security_handler,
> diff --git a/fs/ext3/xattr.h b/fs/ext3/xattr.h
> index 2be4f69..32e93eb 100644
> --- a/fs/ext3/xattr.h
> +++ b/fs/ext3/xattr.h
> @@ -60,8 +60,6 @@ struct ext3_xattr_entry {
>
> extern const struct xattr_handler ext3_xattr_user_handler;
> extern const struct xattr_handler ext3_xattr_trusted_handler;
> -extern const struct xattr_handler ext3_xattr_acl_access_handler;
> -extern const struct xattr_handler ext3_xattr_acl_default_handler;
> extern const struct xattr_handler ext3_xattr_security_handler;
>
> extern ssize_t ext3_listxattr(struct dentry *, char *, size_t);
> diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
> index f827f3b..acaba0f 100644
> --- a/fs/ext4/acl.c
> +++ b/fs/ext4/acl.c
> @@ -196,7 +196,7 @@ ext4_get_acl(struct inode *inode, int type)
> * inode->i_mutex: down unless called from ext4_new_inode
> */
> static int
> -ext4_set_acl(handle_t *handle, struct inode *inode, int type,
> +__ext4_set_acl(handle_t *handle, struct inode *inode, int type,
> struct posix_acl *acl)
> {
> int name_index;
> @@ -248,208 +248,51 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type,
> return error;
> }
>
> -/*
> - * Initialize the ACLs of a new inode. Called from ext4_new_inode.
> - *
> - * dir->i_mutex: down
> - * inode->i_mutex: up (access to inode is still exclusive)
> - */
> -int
> -ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
> -{
> - struct posix_acl *acl = NULL;
> - int error = 0;
> -
> - if (!S_ISLNK(inode->i_mode)) {
> - if (test_opt(dir->i_sb, POSIX_ACL)) {
> - acl = ext4_get_acl(dir, ACL_TYPE_DEFAULT);
> - if (IS_ERR(acl))
> - return PTR_ERR(acl);
> - }
> - if (!acl)
> - inode->i_mode &= ~current_umask();
> - }
> - if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
> - if (S_ISDIR(inode->i_mode)) {
> - error = ext4_set_acl(handle, inode,
> - ACL_TYPE_DEFAULT, acl);
> - if (error)
> - goto cleanup;
> - }
> - error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
> - if (error < 0)
> - return error;
> -
> - if (error > 0) {
> - /* This is an extended ACL */
> - error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
> - }
> - }
> -cleanup:
> - posix_acl_release(acl);
> - return error;
> -}
> -
> -/*
> - * Does chmod for an inode that may have an Access Control List. The
> - * inode->i_mode field must be updated to the desired value by the caller
> - * before calling this function.
> - * Returns 0 on success, or a negative error number.
> - *
> - * We change the ACL rather than storing some ACL entries in the file
> - * mode permission bits (which would be more efficient), because that
> - * would break once additional permissions (like ACL_APPEND, ACL_DELETE
> - * for directories) are added. There are no more bits available in the
> - * file mode.
> - *
> - * inode->i_mutex: down
> - */
> int
> -ext4_acl_chmod(struct inode *inode)
> +ext4_set_acl(struct inode *inode, struct posix_acl *acl, int type)
> {
> - struct posix_acl *acl;
> handle_t *handle;
> - int retries = 0;
> - int error;
> -
> + int error, retries = 0;
>
> - if (S_ISLNK(inode->i_mode))
> - return -EOPNOTSUPP;
> - if (!test_opt(inode->i_sb, POSIX_ACL))
> - return 0;
> - acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);
> - if (IS_ERR(acl) || !acl)
> - return PTR_ERR(acl);
> - error = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
> - if (error)
> - return error;
> retry:
> handle = ext4_journal_start(inode, EXT4_HT_XATTR,
> ext4_jbd2_credits_xattr(inode));
> - if (IS_ERR(handle)) {
> - error = PTR_ERR(handle);
> - ext4_std_error(inode->i_sb, error);
> - goto out;
> - }
> - error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
> + if (IS_ERR(handle))
> + return PTR_ERR(handle);
> +
> + error = __ext4_set_acl(handle, inode, type, acl);
> ext4_journal_stop(handle);
> - if (error == -ENOSPC &&
> - ext4_should_retry_alloc(inode->i_sb, &retries))
> + if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
> goto retry;
> -out:
> - posix_acl_release(acl);
> return error;
> }
>
> /*
> - * Extended attribute handlers
> + * Initialize the ACLs of a new inode. Called from ext4_new_inode.
> + *
> + * dir->i_mutex: down
> + * inode->i_mutex: up (access to inode is still exclusive)
> */
> -static size_t
> -ext4_xattr_list_acl_access(struct dentry *dentry, char *list, size_t list_len,
> - const char *name, size_t name_len, int type)
> -{
> - const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);
> -
> - if (!test_opt(dentry->d_sb, POSIX_ACL))
> - return 0;
> - if (list && size <= list_len)
> - memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
> - return size;
> -}
> -
> -static size_t
> -ext4_xattr_list_acl_default(struct dentry *dentry, char *list, size_t list_len,
> - const char *name, size_t name_len, int type)
> -{
> - const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);
> -
> - if (!test_opt(dentry->d_sb, POSIX_ACL))
> - return 0;
> - if (list && size <= list_len)
> - memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
> - return size;
> -}
> -
> -static int
> -ext4_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer,
> - size_t size, int type)
> +int
> +ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
> {
> - struct posix_acl *acl;
> + struct posix_acl *default_acl, *acl;
> int error;
>
> - if (strcmp(name, "") != 0)
> - return -EINVAL;
> - if (!test_opt(dentry->d_sb, POSIX_ACL))
> - return -EOPNOTSUPP;
> -
> - acl = ext4_get_acl(dentry->d_inode, type);
> - if (IS_ERR(acl))
> - return PTR_ERR(acl);
> - if (acl == NULL)
> - return -ENODATA;
> - error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
> - posix_acl_release(acl);
> -
> - return error;
> -}
> -
> -static int
> -ext4_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
> - size_t size, int flags, int type)
> -{
> - struct inode *inode = dentry->d_inode;
> - handle_t *handle;
> - struct posix_acl *acl;
> - int error, retries = 0;
> -
> - if (strcmp(name, "") != 0)
> - return -EINVAL;
> - if (!test_opt(inode->i_sb, POSIX_ACL))
> - return -EOPNOTSUPP;
> - if (!inode_owner_or_capable(inode))
> - return -EPERM;
> -
> - if (value) {
> - acl = posix_acl_from_xattr(&init_user_ns, value, size);
> - if (IS_ERR(acl))
> - return PTR_ERR(acl);
> - else if (acl) {
> - error = posix_acl_valid(acl);
> - if (error)
> - goto release_and_out;
> - }
> - } else
> - acl = NULL;
> + error = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
> + if (error)
> + return error;
>
> -retry:
> - handle = ext4_journal_start(inode, EXT4_HT_XATTR,
> - ext4_jbd2_credits_xattr(inode));
> - if (IS_ERR(handle)) {
> - error = PTR_ERR(handle);
> - goto release_and_out;
> + if (default_acl) {
> + error = __ext4_set_acl(handle, inode, ACL_TYPE_DEFAULT,
> + default_acl);
> + posix_acl_release(default_acl);
> + }
> + if (acl) {
> + if (!error)
> + error = __ext4_set_acl(handle, inode, ACL_TYPE_ACCESS,
> + acl);
> + posix_acl_release(acl);
> }
> - error = ext4_set_acl(handle, inode, type, acl);
> - ext4_journal_stop(handle);
> - if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
> - goto retry;
> -
> -release_and_out:
> - posix_acl_release(acl);
> return error;
> }
> -
> -const struct xattr_handler ext4_xattr_acl_access_handler = {
> - .prefix = POSIX_ACL_XATTR_ACCESS,
> - .flags = ACL_TYPE_ACCESS,
> - .list = ext4_xattr_list_acl_access,
> - .get = ext4_xattr_get_acl,
> - .set = ext4_xattr_set_acl,
> -};
> -
> -const struct xattr_handler ext4_xattr_acl_default_handler = {
> - .prefix = POSIX_ACL_XATTR_DEFAULT,
> - .flags = ACL_TYPE_DEFAULT,
> - .list = ext4_xattr_list_acl_default,
> - .get = ext4_xattr_get_acl,
> - .set = ext4_xattr_set_acl,
> -};
> diff --git a/fs/ext4/acl.h b/fs/ext4/acl.h
> index 18cb39e..da2c795 100644
> --- a/fs/ext4/acl.h
> +++ b/fs/ext4/acl.h
> @@ -55,18 +55,13 @@ static inline int ext4_acl_count(size_t size)
>
> /* acl.c */
> struct posix_acl *ext4_get_acl(struct inode *inode, int type);
> -extern int ext4_acl_chmod(struct inode *);
> +int ext4_set_acl(struct inode *inode, struct posix_acl *acl, int type);
> extern int ext4_init_acl(handle_t *, struct inode *, struct inode *);
>
> #else /* CONFIG_EXT4_FS_POSIX_ACL */
> #include <linux/sched.h>
> #define ext4_get_acl NULL
> -
> -static inline int
> -ext4_acl_chmod(struct inode *inode)
> -{
> - return 0;
> -}
> +#define ext4_set_acl NULL
>
> static inline int
> ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
> diff --git a/fs/ext4/file.c b/fs/ext4/file.c
> index 3da2194..43e64f6 100644
> --- a/fs/ext4/file.c
> +++ b/fs/ext4/file.c
> @@ -617,6 +617,7 @@ const struct inode_operations ext4_file_inode_operations = {
> .listxattr = ext4_listxattr,
> .removexattr = generic_removexattr,
> .get_acl = ext4_get_acl,
> + .set_acl = ext4_set_acl,
> .fiemap = ext4_fiemap,
> };
>
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index 0757634..6f69f96 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -4675,7 +4675,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
> ext4_orphan_del(NULL, inode);
>
> if (!rc && (ia_valid & ATTR_MODE))
> - rc = ext4_acl_chmod(inode);
> + rc = posix_acl_chmod(inode);
>
> err_out:
> ext4_std_error(inode->i_sb, error);
> diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
> index 5a0408d..e77c1ba 100644
> --- a/fs/ext4/namei.c
> +++ b/fs/ext4/namei.c
> @@ -3225,6 +3225,7 @@ const struct inode_operations ext4_dir_inode_operations = {
> .listxattr = ext4_listxattr,
> .removexattr = generic_removexattr,
> .get_acl = ext4_get_acl,
> + .set_acl = ext4_set_acl,
> .fiemap = ext4_fiemap,
> };
>
> @@ -3235,4 +3236,5 @@ const struct inode_operations ext4_special_inode_operations = {
> .listxattr = ext4_listxattr,
> .removexattr = generic_removexattr,
> .get_acl = ext4_get_acl,
> + .set_acl = ext4_set_acl,
> };
> diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
> index 1423c48..e175e94 100644
> --- a/fs/ext4/xattr.c
> +++ b/fs/ext4/xattr.c
> @@ -95,8 +95,8 @@ static struct mb_cache *ext4_xattr_cache;
> static const struct xattr_handler *ext4_xattr_handler_map[] = {
> [EXT4_XATTR_INDEX_USER] = &ext4_xattr_user_handler,
> #ifdef CONFIG_EXT4_FS_POSIX_ACL
> - [EXT4_XATTR_INDEX_POSIX_ACL_ACCESS] = &ext4_xattr_acl_access_handler,
> - [EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT] = &ext4_xattr_acl_default_handler,
> + [EXT4_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
> + [EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
> #endif
> [EXT4_XATTR_INDEX_TRUSTED] = &ext4_xattr_trusted_handler,
> #ifdef CONFIG_EXT4_FS_SECURITY
> @@ -108,8 +108,8 @@ const struct xattr_handler *ext4_xattr_handlers[] = {
> &ext4_xattr_user_handler,
> &ext4_xattr_trusted_handler,
> #ifdef CONFIG_EXT4_FS_POSIX_ACL
> - &ext4_xattr_acl_access_handler,
> - &ext4_xattr_acl_default_handler,
> + &posix_acl_access_xattr_handler,
> + &posix_acl_default_xattr_handler,
> #endif
> #ifdef CONFIG_EXT4_FS_SECURITY
> &ext4_xattr_security_handler,
> diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
> index c767dbd..819d639 100644
> --- a/fs/ext4/xattr.h
> +++ b/fs/ext4/xattr.h
> @@ -96,8 +96,6 @@ struct ext4_xattr_ibody_find {
>
> extern const struct xattr_handler ext4_xattr_user_handler;
> extern const struct xattr_handler ext4_xattr_trusted_handler;
> -extern const struct xattr_handler ext4_xattr_acl_access_handler;
> -extern const struct xattr_handler ext4_xattr_acl_default_handler;
> extern const struct xattr_handler ext4_xattr_security_handler;
>
> extern ssize_t ext4_listxattr(struct dentry *, char *, size_t);
> --
> 1.7.10.4
>
>
> --
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--
Jan Kara <jack@suse.cz>
SUSE Labs, CR