[PATCH 13/18] reiserfs: use generic posix ACL infrastructure

Christoph Hellwig
2013-12-01T12:07:14Z

[-- Attachment #1: 0013-reiserfs-use-generic-posix-ACL-infrastructure.patch --]
[-- Type: text/plain, Size: 10203 bytes --]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/reiserfs/acl.h | 4 +-
fs/reiserfs/file.c | 1 +
fs/reiserfs/namei.c | 3 +
fs/reiserfs/xattr.c | 5 +-
fs/reiserfs/xattr_acl.c | 175 ++++++++---------------------------------------
5 files changed, 36 insertions(+), 152 deletions(-)

diff --git a/fs/reiserfs/acl.h b/fs/reiserfs/acl.h
index f096b80..4a211f5 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 dcaafcf..ed58d84 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 dc5236f..8ba707e 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,
};

/*
@@ -1539,6 +1540,7 @@ const struct inode_operations reiserfs_symlink_inode_operations = {
.removexattr = reiserfs_removexattr,
.permission = reiserfs_permission,
.get_acl = reiserfs_get_acl,
+ .set_acl = reiserfs_set_acl,

};

@@ -1553,4 +1555,5 @@ 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 8a9e2dc..5cdfbd6 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -50,6 +50,7 @@
#include <linux/stat.h>
#include <linux/quotaops.h>
#include <linux/security.h>
+#include <linux/posix_acl_xattr.h>

#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 d95c959..ff04988 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -11,35 +11,19 @@
#include "acl.h"
#include <asm/uaccess.h>

-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;
}

@@ -273,7 +234,7 @@ 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;
@@ -343,7 +304,7 @@ 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 +324,28 @@ 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 +394,11 @@ 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);
}
-
-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,
-};
--
1.7.10.4