From: Christoph Hellwig Date: Fri, 20 Dec 2013 13:16:49 +0000 (-0800) Subject: reiserfs: use generic posix ACL infrastructure X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=47f70d08facf288a9faad6e6c36ac2e670be8195;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git reiserfs: use generic posix ACL infrastructure Also don't bother to set up a .get_acl method for symlinks as we do not support access control (ACLs or even mode bits) for symlinks in Linux. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Signed-off-by: Al Viro --- diff --git a/fs/reiserfs/acl.h b/fs/reiserfs/acl.h index f096b80e73d8..4a211f5b34b8 100644 --- a/fs/reiserfs/acl.h +++ b/fs/reiserfs/acl.h @@ -48,18 +48,18 @@ static inline int reiserfs_acl_count(size_t size) #ifdef CONFIG_REISERFS_FS_POSIX_ACL struct posix_acl *reiserfs_get_acl(struct inode *inode, int type); +int reiserfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); int reiserfs_acl_chmod(struct inode *inode); int reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th, struct inode *dir, struct dentry *dentry, struct inode *inode); int reiserfs_cache_default_acl(struct inode *dir); -extern const struct xattr_handler reiserfs_posix_acl_default_handler; -extern const struct xattr_handler reiserfs_posix_acl_access_handler; #else #define reiserfs_cache_default_acl(inode) 0 #define reiserfs_get_acl NULL +#define reiserfs_set_acl NULL static inline int reiserfs_acl_chmod(struct inode *inode) { diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c index dcaafcfc23b0..ed58d843d578 100644 --- a/fs/reiserfs/file.c +++ b/fs/reiserfs/file.c @@ -260,4 +260,5 @@ const struct inode_operations reiserfs_file_inode_operations = { .removexattr = reiserfs_removexattr, .permission = reiserfs_permission, .get_acl = reiserfs_get_acl, + .set_acl = reiserfs_set_acl, }; diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c index dc5236f6de1b..e825f8b63e6b 100644 --- a/fs/reiserfs/namei.c +++ b/fs/reiserfs/namei.c @@ -1522,6 +1522,7 @@ const struct inode_operations reiserfs_dir_inode_operations = { .removexattr = reiserfs_removexattr, .permission = reiserfs_permission, .get_acl = reiserfs_get_acl, + .set_acl = reiserfs_set_acl, }; /* @@ -1538,8 +1539,6 @@ const struct inode_operations reiserfs_symlink_inode_operations = { .listxattr = reiserfs_listxattr, .removexattr = reiserfs_removexattr, .permission = reiserfs_permission, - .get_acl = reiserfs_get_acl, - }; /* @@ -1553,4 +1552,5 @@ const struct inode_operations reiserfs_special_inode_operations = { .removexattr = reiserfs_removexattr, .permission = reiserfs_permission, .get_acl = reiserfs_get_acl, + .set_acl = reiserfs_set_acl, }; diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c index 8a9e2dcfe004..5cdfbd638b5c 100644 --- a/fs/reiserfs/xattr.c +++ b/fs/reiserfs/xattr.c @@ -50,6 +50,7 @@ #include #include #include +#include #define PRIVROOT_NAME ".reiserfs_priv" #define XAROOT_NAME "xattrs" @@ -904,8 +905,8 @@ static const struct xattr_handler *reiserfs_xattr_handlers[] = { &reiserfs_xattr_security_handler, #endif #ifdef CONFIG_REISERFS_FS_POSIX_ACL - &reiserfs_posix_acl_access_handler, - &reiserfs_posix_acl_default_handler, + &posix_acl_access_xattr_handler, + &posix_acl_default_xattr_handler, #endif NULL }; diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c index d95c9592327b..a6ce532402dc 100644 --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -11,35 +11,19 @@ #include "acl.h" #include -static int reiserfs_set_acl(struct reiserfs_transaction_handle *th, +static int __reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode, int type, struct posix_acl *acl); -static int -reiserfs_posix_acl_set(struct dentry *dentry, const char *name, const void *value, - size_t size, int flags, int type) + +int +reiserfs_set_acl(struct inode *inode, struct posix_acl *acl, int type) { - struct inode *inode = dentry->d_inode; - struct posix_acl *acl; int error, error2; struct reiserfs_transaction_handle th; size_t jcreate_blocks; - if (!reiserfs_posixacl(inode->i_sb)) - 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; + int size = acl ? posix_acl_xattr_size(acl->a_count) : 0; + /* Pessimism: We can't assume that anything from the xattr root up * has been created. */ @@ -51,7 +35,7 @@ reiserfs_posix_acl_set(struct dentry *dentry, const char *name, const void *valu error = journal_begin(&th, inode->i_sb, jcreate_blocks); reiserfs_write_unlock(inode->i_sb); if (error == 0) { - error = reiserfs_set_acl(&th, inode, type, acl); + error = __reiserfs_set_acl(&th, inode, type, acl); reiserfs_write_lock(inode->i_sb); error2 = journal_end(&th, inode->i_sb, jcreate_blocks); reiserfs_write_unlock(inode->i_sb); @@ -59,29 +43,6 @@ reiserfs_posix_acl_set(struct dentry *dentry, const char *name, const void *valu error = error2; } - release_and_out: - posix_acl_release(acl); - return error; -} - -static int -reiserfs_posix_acl_get(struct dentry *dentry, const char *name, void *buffer, - size_t size, int type) -{ - struct posix_acl *acl; - int error; - - if (!reiserfs_posixacl(dentry->d_sb)) - return -EOPNOTSUPP; - - acl = reiserfs_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; } @@ -221,10 +182,6 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type) int size; int retval; - acl = get_cached_acl(inode, type); - if (acl != ACL_NOT_CACHED) - return acl; - switch (type) { case ACL_TYPE_ACCESS: name = POSIX_ACL_XATTR_ACCESS; @@ -273,7 +230,7 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type) * BKL held [before 2.5.x] */ static int -reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode, +__reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode, int type, struct posix_acl *acl) { char *name; @@ -281,9 +238,6 @@ reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode, size_t size = 0; int error; - if (S_ISLNK(inode->i_mode)) - return -EOPNOTSUPP; - switch (type) { case ACL_TYPE_ACCESS: name = POSIX_ACL_XATTR_ACCESS; @@ -343,7 +297,7 @@ reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th, struct inode *dir, struct dentry *dentry, struct inode *inode) { - struct posix_acl *acl; + struct posix_acl *default_acl, *acl; int err = 0; /* ACLs only get applied to files and directories */ @@ -363,37 +317,28 @@ reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th, goto apply_umask; } - acl = reiserfs_get_acl(dir, ACL_TYPE_DEFAULT); - if (IS_ERR(acl)) - return PTR_ERR(acl); + err = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl); + if (err) + return err; + if (default_acl) { + err = __reiserfs_set_acl(th, inode, ACL_TYPE_DEFAULT, + default_acl); + posix_acl_release(default_acl); + } if (acl) { - /* Copy the default ACL to the default ACL of a new directory */ - if (S_ISDIR(inode->i_mode)) { - err = reiserfs_set_acl(th, inode, ACL_TYPE_DEFAULT, - acl); - if (err) - goto cleanup; - } - - /* Now we reconcile the new ACL and the mode, - potentially modifying both */ - err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode); - if (err < 0) - return err; - - /* If we need an ACL.. */ - if (err > 0) - err = reiserfs_set_acl(th, inode, ACL_TYPE_ACCESS, acl); - cleanup: + if (!err) + err = __reiserfs_set_acl(th, inode, ACL_TYPE_ACCESS, + acl); posix_acl_release(acl); - } else { - apply_umask: - /* no ACL, apply umask */ - inode->i_mode &= ~current_umask(); } return err; + + apply_umask: + /* no ACL, apply umask */ + inode->i_mode &= ~current_umask(); + return err; } /* This is used to cache the default acl before a new object is created. @@ -442,84 +387,11 @@ int reiserfs_cache_default_acl(struct inode *inode) */ int reiserfs_acl_chmod(struct inode *inode) { - struct reiserfs_transaction_handle th; - struct posix_acl *acl; - size_t size; - int error; - if (IS_PRIVATE(inode)) return 0; - - if (S_ISLNK(inode->i_mode)) - return -EOPNOTSUPP; - if (get_inode_sd_version(inode) == STAT_DATA_V1 || - !reiserfs_posixacl(inode->i_sb)) { + !reiserfs_posixacl(inode->i_sb)) return 0; - } - acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS); - if (!acl) - return 0; - if (IS_ERR(acl)) - return PTR_ERR(acl); - error = __posix_acl_chmod(&acl, GFP_NOFS, inode->i_mode); - if (error) - return error; - - size = reiserfs_xattr_nblocks(inode, reiserfs_acl_size(acl->a_count)); - reiserfs_write_lock(inode->i_sb); - error = journal_begin(&th, inode->i_sb, size * 2); - reiserfs_write_unlock(inode->i_sb); - if (!error) { - int error2; - error = reiserfs_set_acl(&th, inode, ACL_TYPE_ACCESS, acl); - reiserfs_write_lock(inode->i_sb); - error2 = journal_end(&th, inode->i_sb, size * 2); - reiserfs_write_unlock(inode->i_sb); - if (error2) - error = error2; - } - posix_acl_release(acl); - return error; -} - -static size_t posix_acl_access_list(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 (!reiserfs_posixacl(dentry->d_sb)) - return 0; - if (list && size <= list_size) - memcpy(list, POSIX_ACL_XATTR_ACCESS, size); - return size; + return posix_acl_chmod(inode, inode->i_mode); } - -const struct xattr_handler reiserfs_posix_acl_access_handler = { - .prefix = POSIX_ACL_XATTR_ACCESS, - .flags = ACL_TYPE_ACCESS, - .get = reiserfs_posix_acl_get, - .set = reiserfs_posix_acl_set, - .list = posix_acl_access_list, -}; - -static size_t posix_acl_default_list(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 (!reiserfs_posixacl(dentry->d_sb)) - return 0; - if (list && size <= list_size) - memcpy(list, POSIX_ACL_XATTR_DEFAULT, size); - return size; -} - -const struct xattr_handler reiserfs_posix_acl_default_handler = { - .prefix = POSIX_ACL_XATTR_DEFAULT, - .flags = ACL_TYPE_DEFAULT, - .get = reiserfs_posix_acl_get, - .set = reiserfs_posix_acl_set, - .list = posix_acl_default_list, -};