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Diffstat (limited to 'fs/btrfs/acl.c')
-rw-r--r--fs/btrfs/acl.c227
1 files changed, 30 insertions, 197 deletions
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 9c949348510..9a0124a9585 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -28,22 +28,13 @@
#include "btrfs_inode.h"
#include "xattr.h"
-#ifdef CONFIG_BTRFS_FS_POSIX_ACL
-
-static struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
+struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
{
int size;
const char *name;
char *value = NULL;
struct posix_acl *acl;
- if (!IS_POSIXACL(inode))
- return NULL;
-
- acl = get_cached_acl(inode, type);
- if (acl != ACL_NOT_CACHED)
- return acl;
-
switch (type) {
case ACL_TYPE_ACCESS:
name = POSIX_ACL_XATTR_ACCESS;
@@ -61,74 +52,42 @@ static struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
if (!value)
return ERR_PTR(-ENOMEM);
size = __btrfs_getxattr(inode, name, value, size);
- if (size > 0) {
- acl = posix_acl_from_xattr(value, size);
- if (IS_ERR(acl)) {
- kfree(value);
- return acl;
- }
- set_cached_acl(inode, type, acl);
- }
- kfree(value);
+ }
+ if (size > 0) {
+ acl = posix_acl_from_xattr(&init_user_ns, value, size);
} else if (size == -ENOENT || size == -ENODATA || size == 0) {
/* FIXME, who returns -ENOENT? I think nobody */
acl = NULL;
- set_cached_acl(inode, type, acl);
} else {
acl = ERR_PTR(-EIO);
}
+ kfree(value);
- return acl;
-}
-
-static int btrfs_xattr_acl_get(struct dentry *dentry, const char *name,
- void *value, size_t size, int type)
-{
- struct posix_acl *acl;
- int ret = 0;
-
- if (!IS_POSIXACL(dentry->d_inode))
- return -EOPNOTSUPP;
-
- acl = btrfs_get_acl(dentry->d_inode, type);
-
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- if (acl == NULL)
- return -ENODATA;
- ret = posix_acl_to_xattr(acl, value, size);
- posix_acl_release(acl);
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
- return ret;
+ return acl;
}
/*
* Needs to be called with fs_mutex held
*/
-static int btrfs_set_acl(struct btrfs_trans_handle *trans,
+static int __btrfs_set_acl(struct btrfs_trans_handle *trans,
struct inode *inode, struct posix_acl *acl, int type)
{
int ret, size = 0;
const char *name;
char *value = NULL;
- mode_t mode;
-
- if (acl) {
- ret = posix_acl_valid(acl);
- if (ret < 0)
- return ret;
- ret = 0;
- }
switch (type) {
case ACL_TYPE_ACCESS:
- mode = inode->i_mode;
name = POSIX_ACL_XATTR_ACCESS;
if (acl) {
- ret = posix_acl_equiv_mode(acl, &mode);
+ ret = posix_acl_equiv_mode(acl, &inode->i_mode);
if (ret < 0)
return ret;
- inode->i_mode = mode;
+ if (ret == 0)
+ acl = NULL;
}
ret = 0;
break;
@@ -149,7 +108,7 @@ static int btrfs_set_acl(struct btrfs_trans_handle *trans,
goto out;
}
- ret = posix_acl_to_xattr(acl, value, size);
+ ret = posix_acl_to_xattr(&init_user_ns, acl, value, size);
if (ret < 0)
goto out;
}
@@ -164,55 +123,9 @@ out:
return ret;
}
-static int btrfs_xattr_acl_set(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags, int type)
+int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
- int ret;
- struct posix_acl *acl = NULL;
-
- if (!is_owner_or_cap(dentry->d_inode))
- return -EPERM;
-
- if (!IS_POSIXACL(dentry->d_inode))
- return -EOPNOTSUPP;
-
- if (value) {
- acl = posix_acl_from_xattr(value, size);
- if (acl == NULL) {
- value = NULL;
- size = 0;
- } else if (IS_ERR(acl)) {
- return PTR_ERR(acl);
- }
- }
-
- ret = btrfs_set_acl(NULL, dentry->d_inode, acl, type);
-
- posix_acl_release(acl);
-
- return ret;
-}
-
-int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags)
-{
- int error = -EAGAIN;
-
- if (flags & IPERM_FLAG_RCU) {
- if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
- error = -ECHILD;
-
- } else {
- struct posix_acl *acl;
- acl = btrfs_get_acl(inode, ACL_TYPE_ACCESS);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- if (acl) {
- error = posix_acl_permission(inode, acl, mask);
- posix_acl_release(acl);
- }
- }
-
- return error;
+ return __btrfs_set_acl(NULL, inode, acl, type);
}
/*
@@ -223,111 +136,31 @@ int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags)
int btrfs_init_acl(struct btrfs_trans_handle *trans,
struct inode *inode, struct inode *dir)
{
- struct posix_acl *acl = NULL;
+ struct posix_acl *default_acl, *acl;
int ret = 0;
/* this happens with subvols */
if (!dir)
return 0;
- if (!S_ISLNK(inode->i_mode)) {
- if (IS_POSIXACL(dir)) {
- acl = btrfs_get_acl(dir, ACL_TYPE_DEFAULT);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- }
+ ret = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
+ if (ret)
+ return ret;
- if (!acl)
- inode->i_mode &= ~current_umask();
+ if (default_acl) {
+ ret = __btrfs_set_acl(trans, inode, default_acl,
+ ACL_TYPE_DEFAULT);
+ posix_acl_release(default_acl);
}
- if (IS_POSIXACL(dir) && acl) {
- struct posix_acl *clone;
- mode_t mode;
-
- if (S_ISDIR(inode->i_mode)) {
- ret = btrfs_set_acl(trans, inode, acl,
- ACL_TYPE_DEFAULT);
- if (ret)
- goto failed;
- }
- clone = posix_acl_clone(acl, GFP_NOFS);
- ret = -ENOMEM;
- if (!clone)
- goto failed;
-
- mode = inode->i_mode;
- ret = posix_acl_create_masq(clone, &mode);
- if (ret >= 0) {
- inode->i_mode = mode;
- if (ret > 0) {
- /* we need an acl */
- ret = btrfs_set_acl(trans, inode, clone,
- ACL_TYPE_ACCESS);
- }
- }
- posix_acl_release(clone);
+ if (acl) {
+ if (!ret)
+ ret = __btrfs_set_acl(trans, inode, acl,
+ ACL_TYPE_ACCESS);
+ posix_acl_release(acl);
}
-failed:
- posix_acl_release(acl);
-
- return ret;
-}
-
-int btrfs_acl_chmod(struct inode *inode)
-{
- struct posix_acl *acl, *clone;
- int ret = 0;
-
- if (S_ISLNK(inode->i_mode))
- return -EOPNOTSUPP;
-
- if (!IS_POSIXACL(inode))
- return 0;
-
- acl = btrfs_get_acl(inode, ACL_TYPE_ACCESS);
- if (IS_ERR(acl) || !acl)
- return PTR_ERR(acl);
-
- clone = posix_acl_clone(acl, GFP_KERNEL);
- posix_acl_release(acl);
- if (!clone)
- return -ENOMEM;
-
- ret = posix_acl_chmod_masq(clone, inode->i_mode);
- if (!ret)
- ret = btrfs_set_acl(NULL, inode, clone, ACL_TYPE_ACCESS);
-
- posix_acl_release(clone);
+ if (!default_acl && !acl)
+ cache_no_acl(inode);
return ret;
}
-
-const struct xattr_handler btrfs_xattr_acl_default_handler = {
- .prefix = POSIX_ACL_XATTR_DEFAULT,
- .flags = ACL_TYPE_DEFAULT,
- .get = btrfs_xattr_acl_get,
- .set = btrfs_xattr_acl_set,
-};
-
-const struct xattr_handler btrfs_xattr_acl_access_handler = {
- .prefix = POSIX_ACL_XATTR_ACCESS,
- .flags = ACL_TYPE_ACCESS,
- .get = btrfs_xattr_acl_get,
- .set = btrfs_xattr_acl_set,
-};
-
-#else /* CONFIG_BTRFS_FS_POSIX_ACL */
-
-int btrfs_acl_chmod(struct inode *inode)
-{
- return 0;
-}
-
-int btrfs_init_acl(struct btrfs_trans_handle *trans,
- struct inode *inode, struct inode *dir)
-{
- return 0;
-}
-
-#endif /* CONFIG_BTRFS_FS_POSIX_ACL */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 21:53:47 +0000