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authorAl Viro <viro@zeniv.linux.org.uk>2009-06-09 12:11:54 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2009-06-24 08:17:07 -0400
commit073aaa1b142461d91f83da66db1184d7c1b1edea (patch)
tree2b54d185d78f1229418fca521a93e6b55c57248b
parent06b16e9f68edaa1e71aee943d3c030bcf7380af1 (diff)
helpers for acl caching + switch to those
helpers: get_cached_acl(inode, type), set_cached_acl(inode, type, acl), forget_cached_acl(inode, type). ubifs/xattr.c needed includes reordered, the rest is a plain switchover. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/btrfs/acl.c44
-rw-r--r--fs/ext2/acl.c79
-rw-r--r--fs/ext3/acl.c83
-rw-r--r--fs/ext4/acl.c65
-rw-r--r--fs/jffs2/acl.c60
-rw-r--r--fs/jfs/acl.c32
-rw-r--r--fs/jfs/xattr.c10
-rw-r--r--fs/reiserfs/xattr_acl.c49
-rw-r--r--fs/ubifs/xattr.c2
-rw-r--r--include/linux/posix_acl.h64
10 files changed, 155 insertions, 333 deletions
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 6db8a42a3e5e..f128427b995b 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -29,51 +29,28 @@
#ifdef CONFIG_FS_POSIX_ACL
-static void btrfs_update_cached_acl(struct inode *inode,
- struct posix_acl **p_acl,
- struct posix_acl *acl)
-{
- spin_lock(&inode->i_lock);
- if (*p_acl && *p_acl != ACL_NOT_CACHED)
- posix_acl_release(*p_acl);
- *p_acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
-}
-
static struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
{
int size;
const char *name;
char *value = NULL;
- struct posix_acl *acl = NULL, **p_acl;
+ struct posix_acl *acl;
+
+ acl = get_cached_acl(inode, type);
+ if (acl != ACL_NOT_CACHED)
+ return acl;
switch (type) {
case ACL_TYPE_ACCESS:
name = POSIX_ACL_XATTR_ACCESS;
- p_acl = &inode->i_acl;
break;
case ACL_TYPE_DEFAULT:
name = POSIX_ACL_XATTR_DEFAULT;
- p_acl = &inode->i_default_acl;
break;
default:
- return ERR_PTR(-EINVAL);
+ BUG();
}
- /* Handle the cached NULL acl case without locking */
- acl = ACCESS_ONCE(*p_acl);
- if (!acl)
- return acl;
-
- spin_lock(&inode->i_lock);
- acl = *p_acl;
- if (acl != ACL_NOT_CACHED)
- acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
-
- if (acl != ACL_NOT_CACHED)
- return acl;
-
size = __btrfs_getxattr(inode, name, "", 0);
if (size > 0) {
value = kzalloc(size, GFP_NOFS);
@@ -82,13 +59,13 @@ static struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
size = __btrfs_getxattr(inode, name, value, size);
if (size > 0) {
acl = posix_acl_from_xattr(value, size);
- btrfs_update_cached_acl(inode, p_acl, acl);
+ set_cached_acl(inode, type, acl);
}
kfree(value);
} else if (size == -ENOENT || size == -ENODATA || size == 0) {
/* FIXME, who returns -ENOENT? I think nobody */
acl = NULL;
- btrfs_update_cached_acl(inode, p_acl, acl);
+ set_cached_acl(inode, type, acl);
} else {
acl = ERR_PTR(-EIO);
}
@@ -121,7 +98,6 @@ static int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
int ret, size = 0;
const char *name;
- struct posix_acl **p_acl;
char *value = NULL;
mode_t mode;
@@ -141,13 +117,11 @@ static int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
ret = 0;
inode->i_mode = mode;
name = POSIX_ACL_XATTR_ACCESS;
- p_acl = &inode->i_acl;
break;
case ACL_TYPE_DEFAULT:
if (!S_ISDIR(inode->i_mode))
return acl ? -EINVAL : 0;
name = POSIX_ACL_XATTR_DEFAULT;
- p_acl = &inode->i_default_acl;
break;
default:
return -EINVAL;
@@ -172,7 +146,7 @@ out:
kfree(value);
if (!ret)
- btrfs_update_cached_acl(inode, p_acl, acl);
+ set_cached_acl(inode, type, acl);
return ret;
}
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index d2ffddc12117..d636e1297cad 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -125,30 +125,6 @@ fail:
return ERR_PTR(-EINVAL);
}
-static inline struct posix_acl *
-ext2_iget_acl(struct inode *inode, struct posix_acl **i_acl)
-{
- struct posix_acl *acl = ACL_NOT_CACHED;
-
- spin_lock(&inode->i_lock);
- if (*i_acl != ACL_NOT_CACHED)
- acl = posix_acl_dup(*i_acl);
- spin_unlock(&inode->i_lock);
-
- return acl;
-}
-
-static inline void
-ext2_iset_acl(struct inode *inode, struct posix_acl **i_acl,
- struct posix_acl *acl)
-{
- spin_lock(&inode->i_lock);
- if (*i_acl != ACL_NOT_CACHED)
- posix_acl_release(*i_acl);
- *i_acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
-}
-
/*
* inode->i_mutex: don't care
*/
@@ -163,23 +139,19 @@ ext2_get_acl(struct inode *inode, int type)
if (!test_opt(inode->i_sb, POSIX_ACL))
return NULL;
- switch(type) {
- case ACL_TYPE_ACCESS:
- acl = ext2_iget_acl(inode, &inode->i_acl);
- if (acl != ACL_NOT_CACHED)
- return acl;
- name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS;
- break;
-
- case ACL_TYPE_DEFAULT:
- acl = ext2_iget_acl(inode, &inode->i_default_acl);
- if (acl != ACL_NOT_CACHED)
- return acl;
- name_index = EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT;
- break;
-
- default:
- return ERR_PTR(-EINVAL);
+ acl = get_cached_acl(inode, type);
+ if (acl != ACL_NOT_CACHED)
+ return acl;
+
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS;
+ break;
+ case ACL_TYPE_DEFAULT:
+ name_index = EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT;
+ break;
+ default:
+ BUG();
}
retval = ext2_xattr_get(inode, name_index, "", NULL, 0);
if (retval > 0) {
@@ -196,17 +168,9 @@ ext2_get_acl(struct inode *inode, int type)
acl = ERR_PTR(retval);
kfree(value);
- if (!IS_ERR(acl)) {
- switch(type) {
- case ACL_TYPE_ACCESS:
- ext2_iset_acl(inode, &inode->i_acl, acl);
- break;
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
- case ACL_TYPE_DEFAULT:
- ext2_iset_acl(inode, &inode->i_default_acl, acl);
- break;
- }
- }
return acl;
}
@@ -261,17 +225,8 @@ ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
error = ext2_xattr_set(inode, name_index, "", value, size, 0);
kfree(value);
- if (!error) {
- switch(type) {
- case ACL_TYPE_ACCESS:
- ext2_iset_acl(inode, &inode->i_acl, acl);
- break;
-
- case ACL_TYPE_DEFAULT:
- ext2_iset_acl(inode, &inode->i_default_acl, acl);
- break;
- }
- }
+ if (!error)
+ set_cached_acl(inode, type, acl);
return error;
}
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index a9707689d9e1..e167bae37ef0 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -126,33 +126,6 @@ fail:
return ERR_PTR(-EINVAL);
}
-static inline struct posix_acl *
-ext3_iget_acl(struct inode *inode, struct posix_acl **i_acl)
-{
- struct posix_acl *acl = ACCESS_ONCE(*i_acl);
-
- if (acl) {
- spin_lock(&inode->i_lock);
- acl = *i_acl;
- if (acl != ACL_NOT_CACHED)
- acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
- }
-
- return acl;
-}
-
-static inline void
-ext3_iset_acl(struct inode *inode, struct posix_acl **i_acl,
- struct posix_acl *acl)
-{
- spin_lock(&inode->i_lock);
- if (*i_acl != ACL_NOT_CACHED)
- posix_acl_release(*i_acl);
- *i_acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
-}
-
/*
* Inode operation get_posix_acl().
*
@@ -169,24 +142,21 @@ ext3_get_acl(struct inode *inode, int type)
if (!test_opt(inode->i_sb, POSIX_ACL))
return NULL;
- switch(type) {
- case ACL_TYPE_ACCESS:
- acl = ext3_iget_acl(inode, &inode->i_acl);
- if (acl != ACL_NOT_CACHED)
- return acl;
- name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
- break;
-
- case ACL_TYPE_DEFAULT:
- acl = ext3_iget_acl(inode, &inode->i_default_acl);
- if (acl != ACL_NOT_CACHED)
- return acl;
- name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
- break;
-
- default:
- return ERR_PTR(-EINVAL);
+ acl = get_cached_acl(inode, type);
+ if (acl != ACL_NOT_CACHED)
+ return acl;
+
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
+ break;
+ case ACL_TYPE_DEFAULT:
+ name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
+ break;
+ default:
+ BUG();
}
+
retval = ext3_xattr_get(inode, name_index, "", NULL, 0);
if (retval > 0) {
value = kmalloc(retval, GFP_NOFS);
@@ -202,17 +172,9 @@ ext3_get_acl(struct inode *inode, int type)
acl = ERR_PTR(retval);
kfree(value);
- if (!IS_ERR(acl)) {
- switch(type) {
- case ACL_TYPE_ACCESS:
- ext3_iset_acl(inode, &inode->i_acl, acl);
- break;
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
- case ACL_TYPE_DEFAULT:
- ext3_iset_acl(inode, &inode->i_default_acl, acl);
- break;
- }
- }
return acl;
}
@@ -269,17 +231,10 @@ ext3_set_acl(handle_t *handle, struct inode *inode, int type,
value, size, 0);
kfree(value);
- if (!error) {
- switch(type) {
- case ACL_TYPE_ACCESS:
- ext3_iset_acl(inode, &inode->i_acl, acl);
- break;
- case ACL_TYPE_DEFAULT:
- ext3_iset_acl(inode, &inode->i_default_acl, acl);
- break;
- }
- }
+ if (!error)
+ set_cached_acl(inode, type, acl);
+
return error;
}
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 0084e3a19d86..f6d8967149ca 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -126,33 +126,6 @@ fail:
return ERR_PTR(-EINVAL);
}
-static inline struct posix_acl *
-ext4_iget_acl(struct inode *inode, struct posix_acl **i_acl)
-{
- struct posix_acl *acl = ACCESS_ONCE(*i_acl);
-
- if (acl) {
- spin_lock(&inode->i_lock);
- acl = *i_acl;
- if (acl != ACL_NOT_CACHED)
- acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
- }
-
- return acl;
-}
-
-static inline void
-ext4_iset_acl(struct inode *inode, struct posix_acl **i_acl,
- struct posix_acl *acl)
-{
- spin_lock(&inode->i_lock);
- if (*i_acl != ACL_NOT_CACHED)
- posix_acl_release(*i_acl);
- *i_acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
-}
-
/*
* Inode operation get_posix_acl().
*
@@ -169,23 +142,19 @@ ext4_get_acl(struct inode *inode, int type)
if (!test_opt(inode->i_sb, POSIX_ACL))
return NULL;
+ acl = get_cached_acl(inode, type);
+ if (acl != ACL_NOT_CACHED)
+ return acl;
+
switch (type) {
case ACL_TYPE_ACCESS:
- acl = ext4_iget_acl(inode, &inode->i_acl);
- if (acl != ACL_NOT_CACHED)
- return acl;
name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
break;
-
case ACL_TYPE_DEFAULT:
- acl = ext4_iget_acl(inode, &inode->i_default_acl);
- if (acl != ACL_NOT_CACHED)
- return acl;
name_index = EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT;
break;
-
default:
- return ERR_PTR(-EINVAL);
+ BUG();
}
retval = ext4_xattr_get(inode, name_index, "", NULL, 0);
if (retval > 0) {
@@ -202,17 +171,9 @@ ext4_get_acl(struct inode *inode, int type)
acl = ERR_PTR(retval);
kfree(value);
- if (!IS_ERR(acl)) {
- switch (type) {
- case ACL_TYPE_ACCESS:
- ext4_iset_acl(inode, &inode->i_acl, acl);
- break;
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
- case ACL_TYPE_DEFAULT:
- ext4_iset_acl(inode, &inode->i_default_acl, acl);
- break;
- }
- }
return acl;
}
@@ -269,17 +230,9 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type,
value, size, 0);
kfree(value);
- if (!error) {
- switch (type) {
- case ACL_TYPE_ACCESS:
- ext4_iset_acl(inode, &inode->i_acl, acl);
- break;
+ if (!error)
+ set_cached_acl(inode, type, acl);
- case ACL_TYPE_DEFAULT:
- ext4_iset_acl(inode, &inode->i_default_acl, acl);
- break;
- }
- }
return error;
}
diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
index ac16589ebbd1..edd2ad6416d8 100644
--- a/fs/jffs2/acl.c
+++ b/fs/jffs2/acl.c
@@ -156,47 +156,25 @@ static void *jffs2_acl_to_medium(const struct posix_acl *acl, size_t *size)
return ERR_PTR(-EINVAL);
}
-static struct posix_acl *jffs2_iget_acl(struct inode *inode, struct posix_acl **i_acl)
-{
- struct posix_acl *acl = ACL_NOT_CACHED;
-
- spin_lock(&inode->i_lock);
- if (*i_acl != ACL_NOT_CACHED)
- acl = posix_acl_dup(*i_acl);
- spin_unlock(&inode->i_lock);
- return acl;
-}
-
-static void jffs2_iset_acl(struct inode *inode, struct posix_acl **i_acl, struct posix_acl *acl)
-{
- spin_lock(&inode->i_lock);
- if (*i_acl != ACL_NOT_CACHED)
- posix_acl_release(*i_acl);
- *i_acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
-}
-
static struct posix_acl *jffs2_get_acl(struct inode *inode, int type)
{
struct posix_acl *acl;
char *value = NULL;
int rc, xprefix;
+ acl = get_cached_acl(inode, type);
+ if (acl != ACL_NOT_CACHED)
+ return acl;
+
switch (type) {
case ACL_TYPE_ACCESS:
- acl = jffs2_iget_acl(inode, &inode->i_acl);
- if (acl != ACL_NOT_CACHED)
- return acl;
xprefix = JFFS2_XPREFIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
- acl = jffs2_iget_acl(inode, &inode->i_default_acl);
- if (acl != ACL_NOT_CACHED)
- return acl;
xprefix = JFFS2_XPREFIX_ACL_DEFAULT;
break;
default:
- return ERR_PTR(-EINVAL);
+ BUG();
}
rc = do_jffs2_getxattr(inode, xprefix, "", NULL, 0);
if (rc > 0) {
@@ -214,16 +192,8 @@ static struct posix_acl *jffs2_get_acl(struct inode *inode, int type)
}
if (value)
kfree(value);
- if (!IS_ERR(acl)) {
- switch (type) {
- case ACL_TYPE_ACCESS:
- jffs2_iset_acl(inode, &inode->i_acl, acl);
- break;
- case ACL_TYPE_DEFAULT:
- jffs2_iset_acl(inode, &inode->i_default_acl, acl);
- break;
- }
- }
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
return acl;
}
@@ -283,16 +253,8 @@ static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
return -EINVAL;
}
rc = __jffs2_set_acl(inode, xprefix, acl);
- if (!rc) {
- switch(type) {
- case ACL_TYPE_ACCESS:
- jffs2_iset_acl(inode, &inode->i_acl, acl);
- break;
- case ACL_TYPE_DEFAULT:
- jffs2_iset_acl(inode, &inode->i_default_acl, acl);
- break;
- }
- }
+ if (!rc)
+ set_cached_acl(inode, type, acl);
return rc;
}
@@ -336,7 +298,7 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, int *i_mode)
*i_mode &= ~current_umask();
} else {
if (S_ISDIR(*i_mode))
- jffs2_iset_acl(inode, &inode->i_default_acl, acl);
+ set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
clone = posix_acl_clone(acl, GFP_KERNEL);
if (!clone)
@@ -347,7 +309,7 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, int *i_mode)
return rc;
}
if (rc > 0)
- jffs2_iset_acl(inode, &inode->i_acl, clone);
+ set_cached_acl(inode, ACL_TYPE_ACCESS, clone);
posix_acl_release(clone);
}
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index 5fcfc9857c11..f272bf032e1e 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -31,26 +31,24 @@ static struct posix_acl *jfs_get_acl(struct inode *inode, int type)
{
struct posix_acl *acl;
char *ea_name;
- struct posix_acl **p_acl;
int size;
char *value = NULL;
+ acl = get_cached_acl(inode, type);
+ if (acl != ACL_NOT_CACHED)
+ return acl;
+
switch(type) {
case ACL_TYPE_ACCESS:
ea_name = POSIX_ACL_XATTR_ACCESS;
- p_acl = &inode->i_acl;
break;
case ACL_TYPE_DEFAULT:
ea_name = POSIX_ACL_XATTR_DEFAULT;
- p_acl = &inode->i_default_acl;
break;
default:
return ERR_PTR(-EINVAL);
}
- if (*p_acl != ACL_NOT_CACHED)
- return posix_acl_dup(*p_acl);
-
size = __jfs_getxattr(inode, ea_name, NULL, 0);
if (size > 0) {
@@ -61,17 +59,18 @@ static struct posix_acl *jfs_get_acl(struct inode *inode, int type)
}
if (size < 0) {
- if (size == -ENODATA) {
- *p_acl = NULL;
+ if (size == -ENODATA)
acl = NULL;
- } else
+ else
acl = ERR_PTR(size);
} else {
acl = posix_acl_from_xattr(value, size);
- if (!IS_ERR(acl))
- *p_acl = posix_acl_dup(acl);
}
kfree(value);
+ if (!IS_ERR(acl)) {
+ set_cached_acl(inode, type, acl);
+ posix_acl_release(acl);
+ }
return acl;
}
@@ -79,7 +78,6 @@ static int jfs_set_acl(tid_t tid, struct inode *inode, int type,
struct posix_acl *acl)
{
char *ea_name;
- struct posix_acl **p_acl;
int rc;
int size = 0;
char *value = NULL;
@@ -90,11 +88,9 @@ static int jfs_set_acl(tid_t tid, struct inode *inode, int type,
switch(type) {
case ACL_TYPE_ACCESS:
ea_name = POSIX_ACL_XATTR_ACCESS;
- p_acl = &inode->i_acl;
break;
case ACL_TYPE_DEFAULT:
ea_name = POSIX_ACL_XATTR_DEFAULT;
- p_acl = &inode->i_default_acl;
if (!S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
break;
@@ -114,11 +110,9 @@ static int jfs_set_acl(tid_t tid, struct inode *inode, int type,
out:
kfree(value);
- if (!rc) {
- if (*p_acl && (*p_acl != ACL_NOT_CACHED))
- posix_acl_release(*p_acl);
- *p_acl = posix_acl_dup(acl);
- }
+ if (!rc)
+ set_cached_acl(inode, type, acl);
+
return rc;
}
diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c
index f6e90e343593..fad364548bc9 100644
--- a/fs/jfs/xattr.c
+++ b/fs/jfs/xattr.c
@@ -727,10 +727,7 @@ static int can_set_system_xattr(struct inode *inode, const char *name,
/*
* We're changing the ACL. Get rid of the cached one
*/
- acl =inode->i_acl;
- if (acl != ACL_NOT_CACHED)
- posix_acl_release(acl);
- inode->i_acl = ACL_NOT_CACHED;
+ forget_cached_acl(inode, ACL_TYPE_ACCESS);
return 0;
} else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0) {
@@ -746,10 +743,7 @@ static int can_set_system_xattr(struct inode *inode, const char *name,
/*
* We're changing the default ACL. Get rid of the cached one
*/
- acl = inode->i_default_acl;
- if (acl && (acl != ACL_NOT_CACHED))
- posix_acl_release(acl);
- inode->i_default_acl = ACL_NOT_CACHED;
+ forget_cached_acl(inode, ACL_TYPE_DEFAULT);
return 0;
}
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index b6e473faa8b8..35d6e672a279 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -188,29 +188,6 @@ static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
return ERR_PTR(-EINVAL);
}
-static inline void iset_acl(struct inode *inode, struct posix_acl **i_acl,
- struct posix_acl *acl)
-{
- spin_lock(&inode->i_lock);
- if (*i_acl != ACL_NOT_CACHED)
- posix_acl_release(*i_acl);
- *i_acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
-}
-
-static inline struct posix_acl *iget_acl(struct inode *inode,
- struct posix_acl **i_acl)
-{
- struct posix_acl *acl = ACL_NOT_CACHED;
-
- spin_lock(&inode->i_lock);
- if (*i_acl != ACL_NOT_CACHED)
- acl = posix_acl_dup(*i_acl);
- spin_unlock(&inode->i_lock);
-
- return acl;
-}
-
/*
* Inode operation get_posix_acl().
*
@@ -220,31 +197,29 @@ static inline struct posix_acl *iget_acl(struct inode *inode,
struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
{
char *name, *value;
- struct posix_acl *acl, **p_acl;
+ struct posix_acl *acl;
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;
- p_acl = &inode->i_acl;
break;
case ACL_TYPE_DEFAULT:
name = POSIX_ACL_XATTR_DEFAULT;
- p_acl = &inode->i_default_acl;
break;
default:
- return ERR_PTR(-EINVAL);
+ BUG();
}
- acl = iget_acl(inode, p_acl);
- if (acl != ACL_NOT_CACHED)
- return acl;
-
size = reiserfs_xattr_get(inode, name, NULL, 0);
if (size < 0) {
if (size == -ENODATA || size == -ENOSYS) {
- *p_acl = NULL;
+ set_cached_acl(inode, type, NULL);
return NULL;
}
return ERR_PTR(size);
@@ -259,14 +234,13 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
/* This shouldn't actually happen as it should have
been caught above.. but just in case */
acl = NULL;
- *p_acl = acl;
} else if (retval < 0) {
acl = ERR_PTR(retval);
} else {
acl = posix_acl_from_disk(value, retval);
- if (!IS_ERR(acl))
- iset_acl(inode, p_acl, acl);
}
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
kfree(value);
return acl;
@@ -284,7 +258,6 @@ reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode,
{
char *name;
void *value = NULL;
- struct posix_acl **p_acl;
size_t size = 0;
int error;
@@ -294,7 +267,6 @@ reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode,
switch (type) {
case ACL_TYPE_ACCESS:
name = POSIX_ACL_XATTR_ACCESS;
- p_acl = &inode->i_acl;
if (acl) {
mode_t mode = inode->i_mode;
error = posix_acl_equiv_mode(acl, &mode);
@@ -309,7 +281,6 @@ reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode,
break;
case ACL_TYPE_DEFAULT:
name = POSIX_ACL_XATTR_DEFAULT;
- p_acl = &inode->i_default_acl;
if (!S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
break;
@@ -342,7 +313,7 @@ reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode,
kfree(value);
if (!error)
- iset_acl(inode, p_acl, acl);
+ set_cached_acl(inode, type, acl);
return error;
}
diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index cfd31e229c89..adafcf556531 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -55,9 +55,9 @@
* ACL support is not implemented.
*/
+#include "ubifs.h"
#include <linux/xattr.h>
#include <linux/posix_acl_xattr.h>
-#include "ubifs.h"
/*
* Limit the number of extended attributes per inode so that the total size
diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
index 4bc241290c24..0cdba01b7756 100644
--- a/include/linux/posix_acl.h
+++ b/include/linux/posix_acl.h
@@ -83,4 +83,68 @@ extern int posix_acl_chmod_masq(struct posix_acl *, mode_t);
extern struct posix_acl *get_posix_acl(struct inode *, int);
extern int set_posix_acl(struct inode *, int, struct posix_acl *);
+static inline struct posix_acl *get_cached_acl(struct inode *inode, int type)
+{
+ struct posix_acl **p, *acl;
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ p = &inode->i_acl;
+ break;
+ case ACL_TYPE_DEFAULT:
+ p = &inode->i_default_acl;
+ break;
+ default:
+ return ERR_PTR(-EINVAL);
+ }
+ acl = ACCESS_ONCE(*p);
+ if (acl) {
+ spin_lock(&inode->i_lock);
+ acl = *p;
+ if (acl != ACL_NOT_CACHED)
+ acl = posix_acl_dup(acl);
+ spin_unlock(&inode->i_lock);
+ }
+ return acl;
+}
+
+static inline void set_cached_acl(struct inode *inode,
+ int type,
+ struct posix_acl *acl)
+{
+ struct posix_acl *old = NULL;
+ spin_lock(&inode->i_lock);
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ old = inode->i_acl;
+ inode->i_acl = posix_acl_dup(acl);
+ break;
+ case ACL_TYPE_DEFAULT:
+ old = inode->i_default_acl;
+ inode->i_default_acl = posix_acl_dup(acl);
+ break;
+ }
+ spin_unlock(&inode->i_lock);
+ if (old != ACL_NOT_CACHED)
+ posix_acl_release(old);
+}
+
+static inline void forget_cached_acl(struct inode *inode, int type)
+{
+ struct posix_acl *old = NULL;
+ spin_lock(&inode->i_lock);
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ old = inode->i_acl;
+ inode->i_acl = ACL_NOT_CACHED;
+ break;
+ case ACL_TYPE_DEFAULT:
+ old = inode->i_default_acl;
+ inode->i_default_acl = ACL_NOT_CACHED;
+ break;
+ }
+ spin_unlock(&inode->i_lock);
+ if (old != ACL_NOT_CACHED)
+ posix_acl_release(old);
+}
+
#endif /* __LINUX_POSIX_ACL_H */

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