/*
- * linux/fs/ext3/acl.c
+ * linux/fs/ext4/acl.c
*
* Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
*/
#include <linux/slab.h>
#include <linux/capability.h>
#include <linux/fs.h>
-#include <linux/ext3_jbd.h>
-#include <linux/ext3_fs.h>
+#include "ext4_jbd2.h"
+#include "ext4.h"
#include "xattr.h"
#include "acl.h"
* Convert from filesystem to in-memory representation.
*/
static struct posix_acl *
-ext3_acl_from_disk(const void *value, size_t size)
+ext4_acl_from_disk(const void *value, size_t size)
{
const char *end = (char *)value + size;
int n, count;
if (!value)
return NULL;
- if (size < sizeof(ext3_acl_header))
+ if (size < sizeof(ext4_acl_header))
return ERR_PTR(-EINVAL);
- if (((ext3_acl_header *)value)->a_version !=
- cpu_to_le32(EXT3_ACL_VERSION))
+ if (((ext4_acl_header *)value)->a_version !=
+ cpu_to_le32(EXT4_ACL_VERSION))
return ERR_PTR(-EINVAL);
- value = (char *)value + sizeof(ext3_acl_header);
- count = ext3_acl_count(size);
+ value = (char *)value + sizeof(ext4_acl_header);
+ count = ext4_acl_count(size);
if (count < 0)
return ERR_PTR(-EINVAL);
if (count == 0)
return NULL;
- acl = posix_acl_alloc(count, GFP_KERNEL);
+ acl = posix_acl_alloc(count, GFP_NOFS);
if (!acl)
return ERR_PTR(-ENOMEM);
- for (n=0; n < count; n++) {
- ext3_acl_entry *entry =
- (ext3_acl_entry *)value;
- if ((char *)value + sizeof(ext3_acl_entry_short) > end)
+ for (n = 0; n < count; n++) {
+ ext4_acl_entry *entry =
+ (ext4_acl_entry *)value;
+ if ((char *)value + sizeof(ext4_acl_entry_short) > end)
goto fail;
acl->a_entries[n].e_tag = le16_to_cpu(entry->e_tag);
acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
- switch(acl->a_entries[n].e_tag) {
- case ACL_USER_OBJ:
- case ACL_GROUP_OBJ:
- case ACL_MASK:
- case ACL_OTHER:
- value = (char *)value +
- sizeof(ext3_acl_entry_short);
- acl->a_entries[n].e_id = ACL_UNDEFINED_ID;
- break;
-
- case ACL_USER:
- case ACL_GROUP:
- value = (char *)value + sizeof(ext3_acl_entry);
- if ((char *)value > end)
- goto fail;
- acl->a_entries[n].e_id =
- le32_to_cpu(entry->e_id);
- break;
-
- default:
+
+ switch (acl->a_entries[n].e_tag) {
+ case ACL_USER_OBJ:
+ case ACL_GROUP_OBJ:
+ case ACL_MASK:
+ case ACL_OTHER:
+ value = (char *)value +
+ sizeof(ext4_acl_entry_short);
+ acl->a_entries[n].e_id = ACL_UNDEFINED_ID;
+ break;
+
+ case ACL_USER:
+ case ACL_GROUP:
+ value = (char *)value + sizeof(ext4_acl_entry);
+ if ((char *)value > end)
goto fail;
+ acl->a_entries[n].e_id =
+ le32_to_cpu(entry->e_id);
+ break;
+
+ default:
+ goto fail;
}
}
if (value != end)
* Convert from in-memory to filesystem representation.
*/
static void *
-ext3_acl_to_disk(const struct posix_acl *acl, size_t *size)
+ext4_acl_to_disk(const struct posix_acl *acl, size_t *size)
{
- ext3_acl_header *ext_acl;
+ ext4_acl_header *ext_acl;
char *e;
size_t n;
- *size = ext3_acl_size(acl->a_count);
- ext_acl = kmalloc(sizeof(ext3_acl_header) + acl->a_count *
- sizeof(ext3_acl_entry), GFP_KERNEL);
+ *size = ext4_acl_size(acl->a_count);
+ ext_acl = kmalloc(sizeof(ext4_acl_header) + acl->a_count *
+ sizeof(ext4_acl_entry), GFP_NOFS);
if (!ext_acl)
return ERR_PTR(-ENOMEM);
- ext_acl->a_version = cpu_to_le32(EXT3_ACL_VERSION);
- e = (char *)ext_acl + sizeof(ext3_acl_header);
- for (n=0; n < acl->a_count; n++) {
- ext3_acl_entry *entry = (ext3_acl_entry *)e;
+ ext_acl->a_version = cpu_to_le32(EXT4_ACL_VERSION);
+ e = (char *)ext_acl + sizeof(ext4_acl_header);
+ for (n = 0; n < acl->a_count; n++) {
+ ext4_acl_entry *entry = (ext4_acl_entry *)e;
entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
- switch(acl->a_entries[n].e_tag) {
- case ACL_USER:
- case ACL_GROUP:
- entry->e_id =
- cpu_to_le32(acl->a_entries[n].e_id);
- e += sizeof(ext3_acl_entry);
- break;
-
- case ACL_USER_OBJ:
- case ACL_GROUP_OBJ:
- case ACL_MASK:
- case ACL_OTHER:
- e += sizeof(ext3_acl_entry_short);
- break;
-
- default:
- goto fail;
+ switch (acl->a_entries[n].e_tag) {
+ case ACL_USER:
+ case ACL_GROUP:
+ entry->e_id = cpu_to_le32(acl->a_entries[n].e_id);
+ e += sizeof(ext4_acl_entry);
+ break;
+
+ case ACL_USER_OBJ:
+ case ACL_GROUP_OBJ:
+ case ACL_MASK:
+ case ACL_OTHER:
+ e += sizeof(ext4_acl_entry_short);
+ break;
+
+ default:
+ goto fail;
}
}
return (char *)ext_acl;
return ERR_PTR(-EINVAL);
}
-static inline struct posix_acl *
-ext3_iget_acl(struct inode *inode, struct posix_acl **i_acl)
-{
- struct posix_acl *acl = EXT3_ACL_NOT_CACHED;
-
- spin_lock(&inode->i_lock);
- if (*i_acl != EXT3_ACL_NOT_CACHED)
- acl = posix_acl_dup(*i_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 != EXT3_ACL_NOT_CACHED)
- posix_acl_release(*i_acl);
- *i_acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
-}
-
/*
* Inode operation get_posix_acl().
*
* inode->i_mutex: don't care
*/
static struct posix_acl *
-ext3_get_acl(struct inode *inode, int type)
+ext4_get_acl(struct inode *inode, int type)
{
- struct ext3_inode_info *ei = EXT3_I(inode);
int name_index;
char *value = NULL;
struct posix_acl *acl;
if (!test_opt(inode->i_sb, POSIX_ACL))
return NULL;
- switch(type) {
- case ACL_TYPE_ACCESS:
- acl = ext3_iget_acl(inode, &ei->i_acl);
- if (acl != EXT3_ACL_NOT_CACHED)
- return acl;
- name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
- break;
-
- case ACL_TYPE_DEFAULT:
- acl = ext3_iget_acl(inode, &ei->i_default_acl);
- if (acl != EXT3_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 = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
+ break;
+ case ACL_TYPE_DEFAULT:
+ name_index = EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT;
+ break;
+ default:
+ BUG();
}
- retval = ext3_xattr_get(inode, name_index, "", NULL, 0);
+ retval = ext4_xattr_get(inode, name_index, "", NULL, 0);
if (retval > 0) {
- value = kmalloc(retval, GFP_KERNEL);
+ value = kmalloc(retval, GFP_NOFS);
if (!value)
return ERR_PTR(-ENOMEM);
- retval = ext3_xattr_get(inode, name_index, "", value, retval);
+ retval = ext4_xattr_get(inode, name_index, "", value, retval);
}
if (retval > 0)
- acl = ext3_acl_from_disk(value, retval);
+ acl = ext4_acl_from_disk(value, retval);
else if (retval == -ENODATA || retval == -ENOSYS)
acl = NULL;
else
acl = ERR_PTR(retval);
kfree(value);
- if (!IS_ERR(acl)) {
- switch(type) {
- case ACL_TYPE_ACCESS:
- ext3_iset_acl(inode, &ei->i_acl, acl);
- break;
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
- case ACL_TYPE_DEFAULT:
- ext3_iset_acl(inode, &ei->i_default_acl, acl);
- break;
- }
- }
return acl;
}
/*
* Set the access or default ACL of an inode.
*
- * inode->i_mutex: down unless called from ext3_new_inode
+ * inode->i_mutex: down unless called from ext4_new_inode
*/
static int
-ext3_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)
{
- struct ext3_inode_info *ei = EXT3_I(inode);
int name_index;
void *value = NULL;
size_t size = 0;
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
- switch(type) {
- case ACL_TYPE_ACCESS:
- name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
- if (acl) {
- mode_t mode = inode->i_mode;
- error = posix_acl_equiv_mode(acl, &mode);
- if (error < 0)
- return error;
- else {
- inode->i_mode = mode;
- ext3_mark_inode_dirty(handle, inode);
- if (error == 0)
- acl = NULL;
- }
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
+ if (acl) {
+ mode_t mode = inode->i_mode;
+ error = posix_acl_equiv_mode(acl, &mode);
+ if (error < 0)
+ return error;
+ else {
+ inode->i_mode = mode;
+ ext4_mark_inode_dirty(handle, inode);
+ if (error == 0)
+ acl = NULL;
}
- break;
+ }
+ break;
- case ACL_TYPE_DEFAULT:
- name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
- if (!S_ISDIR(inode->i_mode))
- return acl ? -EACCES : 0;
- break;
+ case ACL_TYPE_DEFAULT:
+ name_index = EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT;
+ if (!S_ISDIR(inode->i_mode))
+ return acl ? -EACCES : 0;
+ break;
- default:
- return -EINVAL;
+ default:
+ return -EINVAL;
}
if (acl) {
- value = ext3_acl_to_disk(acl, &size);
+ value = ext4_acl_to_disk(acl, &size);
if (IS_ERR(value))
return (int)PTR_ERR(value);
}
- error = ext3_xattr_set_handle(handle, inode, name_index, "",
+ error = ext4_xattr_set_handle(handle, inode, name_index, "",
value, size, 0);
kfree(value);
- if (!error) {
- switch(type) {
- case ACL_TYPE_ACCESS:
- ext3_iset_acl(inode, &ei->i_acl, acl);
- break;
-
- case ACL_TYPE_DEFAULT:
- ext3_iset_acl(inode, &ei->i_default_acl, acl);
- break;
- }
- }
+ if (!error)
+ set_cached_acl(inode, type, acl);
+
return error;
}
-static int
-ext3_check_acl(struct inode *inode, int mask)
+int
+ext4_check_acl(struct inode *inode, int mask)
{
- struct posix_acl *acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);
+ struct posix_acl *acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
return -EAGAIN;
}
-int
-ext3_permission(struct inode *inode, int mask, struct nameidata *nd)
-{
- return generic_permission(inode, mask, ext3_check_acl);
-}
-
/*
- * Initialize the ACLs of a new inode. Called from ext3_new_inode.
+ * 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
-ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
+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 = ext3_get_acl(dir, ACL_TYPE_DEFAULT);
+ acl = ext4_get_acl(dir, ACL_TYPE_DEFAULT);
if (IS_ERR(acl))
return PTR_ERR(acl);
}
if (!acl)
- inode->i_mode &= ~current->fs->umask;
+ inode->i_mode &= ~current_umask();
}
if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
struct posix_acl *clone;
mode_t mode;
if (S_ISDIR(inode->i_mode)) {
- error = ext3_set_acl(handle, inode,
+ error = ext4_set_acl(handle, inode,
ACL_TYPE_DEFAULT, acl);
if (error)
goto cleanup;
}
- clone = posix_acl_clone(acl, GFP_KERNEL);
+ clone = posix_acl_clone(acl, GFP_NOFS);
error = -ENOMEM;
if (!clone)
goto cleanup;
inode->i_mode = mode;
if (error > 0) {
/* This is an extended ACL */
- error = ext3_set_acl(handle, inode,
+ error = ext4_set_acl(handle, inode,
ACL_TYPE_ACCESS, clone);
}
}
* inode->i_mutex: down
*/
int
-ext3_acl_chmod(struct inode *inode)
+ext4_acl_chmod(struct inode *inode)
{
struct posix_acl *acl, *clone;
- int error;
+ int error;
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);
+ acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
clone = posix_acl_clone(acl, GFP_KERNEL);
int retries = 0;
retry:
- handle = ext3_journal_start(inode,
- EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
+ handle = ext4_journal_start(inode,
+ EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
- ext3_std_error(inode->i_sb, error);
+ ext4_std_error(inode->i_sb, error);
goto out;
}
- error = ext3_set_acl(handle, inode, ACL_TYPE_ACCESS, clone);
- ext3_journal_stop(handle);
+ error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, clone);
+ ext4_journal_stop(handle);
if (error == -ENOSPC &&
- ext3_should_retry_alloc(inode->i_sb, &retries))
+ ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry;
}
out:
* Extended attribute handlers
*/
static size_t
-ext3_xattr_list_acl_access(struct inode *inode, char *list, size_t list_len,
- const char *name, size_t name_len)
+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(inode->i_sb, POSIX_ACL))
+ if (!test_opt(dentry->d_sb, POSIX_ACL))
return 0;
if (list && size <= list_len)
memcpy(list, POSIX_ACL_XATTR_ACCESS, size);
}
static size_t
-ext3_xattr_list_acl_default(struct inode *inode, char *list, size_t list_len,
- const char *name, size_t name_len)
+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(inode->i_sb, POSIX_ACL))
+ if (!test_opt(dentry->d_sb, POSIX_ACL))
return 0;
if (list && size <= list_len)
memcpy(list, POSIX_ACL_XATTR_DEFAULT, size);
}
static int
-ext3_xattr_get_acl(struct inode *inode, int type, void *buffer, size_t size)
+ext4_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer,
+ size_t size, int type)
{
struct posix_acl *acl;
int error;
- if (!test_opt(inode->i_sb, POSIX_ACL))
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
+ if (!test_opt(dentry->d_sb, POSIX_ACL))
return -EOPNOTSUPP;
- acl = ext3_get_acl(inode, type);
+ acl = ext4_get_acl(dentry->d_inode, type);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl == NULL)
}
static int
-ext3_xattr_get_acl_access(struct inode *inode, const char *name,
- void *buffer, size_t size)
-{
- if (strcmp(name, "") != 0)
- return -EINVAL;
- return ext3_xattr_get_acl(inode, ACL_TYPE_ACCESS, buffer, size);
-}
-
-static int
-ext3_xattr_get_acl_default(struct inode *inode, const char *name,
- void *buffer, size_t size)
-{
- if (strcmp(name, "") != 0)
- return -EINVAL;
- return ext3_xattr_get_acl(inode, ACL_TYPE_DEFAULT, buffer, size);
-}
-
-static int
-ext3_xattr_set_acl(struct inode *inode, int type, const void *value,
- size_t size)
+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 ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+ if (!is_owner_or_cap(inode))
return -EPERM;
if (value) {
acl = NULL;
retry:
- handle = ext3_journal_start(inode, EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
+ handle = ext4_journal_start(inode, EXT4_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))
+ 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:
return error;
}
-static int
-ext3_xattr_set_acl_access(struct inode *inode, const char *name,
- const void *value, size_t size, int flags)
-{
- if (strcmp(name, "") != 0)
- return -EINVAL;
- return ext3_xattr_set_acl(inode, ACL_TYPE_ACCESS, value, size);
-}
-
-static int
-ext3_xattr_set_acl_default(struct inode *inode, const char *name,
- const void *value, size_t size, int flags)
-{
- if (strcmp(name, "") != 0)
- return -EINVAL;
- return ext3_xattr_set_acl(inode, ACL_TYPE_DEFAULT, value, size);
-}
-
-struct xattr_handler ext3_xattr_acl_access_handler = {
+struct xattr_handler ext4_xattr_acl_access_handler = {
.prefix = POSIX_ACL_XATTR_ACCESS,
- .list = ext3_xattr_list_acl_access,
- .get = ext3_xattr_get_acl_access,
- .set = ext3_xattr_set_acl_access,
+ .flags = ACL_TYPE_ACCESS,
+ .list = ext4_xattr_list_acl_access,
+ .get = ext4_xattr_get_acl,
+ .set = ext4_xattr_set_acl,
};
-struct xattr_handler ext3_xattr_acl_default_handler = {
+struct xattr_handler ext4_xattr_acl_default_handler = {
.prefix = POSIX_ACL_XATTR_DEFAULT,
- .list = ext3_xattr_list_acl_default,
- .get = ext3_xattr_get_acl_default,
- .set = ext3_xattr_set_acl_default,
+ .flags = ACL_TYPE_DEFAULT,
+ .list = ext4_xattr_list_acl_default,
+ .get = ext4_xattr_get_acl,
+ .set = ext4_xattr_set_acl,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff