#include <linux/slab.h>
#include <linux/capability.h>
#include <linux/fs.h>
-#include <linux/ext4_jbd.h>
-#include <linux/ext4_fs.h>
+#include "ext4_jbd2.h"
+#include "ext4.h"
#include "xattr.h"
#include "acl.h"
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++) {
+ 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(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:
+
+ 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)
*size = ext4_acl_size(acl->a_count);
ext_acl = kmalloc(sizeof(ext4_acl_header) + acl->a_count *
- sizeof(ext4_acl_entry), GFP_KERNEL);
+ sizeof(ext4_acl_entry), GFP_NOFS);
if (!ext_acl)
return ERR_PTR(-ENOMEM);
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++) {
+ 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(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;
+ 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 *
-ext4_iget_acl(struct inode *inode, struct posix_acl **i_acl)
-{
- struct posix_acl *acl = EXT4_ACL_NOT_CACHED;
-
- spin_lock(&inode->i_lock);
- if (*i_acl != EXT4_ACL_NOT_CACHED)
- acl = posix_acl_dup(*i_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 != EXT4_ACL_NOT_CACHED)
- posix_acl_release(*i_acl);
- *i_acl = posix_acl_dup(acl);
- spin_unlock(&inode->i_lock);
-}
-
/*
* Inode operation get_posix_acl().
*
static struct posix_acl *
ext4_get_acl(struct inode *inode, int type)
{
- struct ext4_inode_info *ei = EXT4_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 = ext4_iget_acl(inode, &ei->i_acl);
- if (acl != EXT4_ACL_NOT_CACHED)
- return acl;
- name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
- break;
-
- case ACL_TYPE_DEFAULT:
- acl = ext4_iget_acl(inode, &ei->i_default_acl);
- if (acl != EXT4_ACL_NOT_CACHED)
- return acl;
- name_index = EXT4_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 = 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 = ext4_xattr_get(inode, name_index, "", value, retval);
acl = ERR_PTR(retval);
kfree(value);
- if (!IS_ERR(acl)) {
- switch(type) {
- case ACL_TYPE_ACCESS:
- ext4_iset_acl(inode, &ei->i_acl, acl);
- break;
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
- case ACL_TYPE_DEFAULT:
- ext4_iset_acl(inode, &ei->i_default_acl, acl);
- break;
- }
- }
return acl;
}
ext4_set_acl(handle_t *handle, struct inode *inode, int type,
struct posix_acl *acl)
{
- struct ext4_inode_info *ei = EXT4_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 = 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;
- }
+ 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 = EXT4_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 = ext4_acl_to_disk(acl, &size);
value, size, 0);
kfree(value);
- if (!error) {
- switch(type) {
- case ACL_TYPE_ACCESS:
- ext4_iset_acl(inode, &ei->i_acl, acl);
- break;
-
- case ACL_TYPE_DEFAULT:
- ext4_iset_acl(inode, &ei->i_default_acl, acl);
- break;
- }
- }
+ if (!error)
+ set_cached_acl(inode, type, acl);
+
return error;
}
-static int
+int
ext4_check_acl(struct inode *inode, int mask)
{
struct posix_acl *acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);
return -EAGAIN;
}
-int
-ext4_permission(struct inode *inode, int mask, struct nameidata *nd)
-{
- return generic_permission(inode, mask, ext4_check_acl);
-}
-
/*
* Initialize the ACLs of a new inode. Called from ext4_new_inode.
*
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;
if (error)
goto cleanup;
}
- clone = posix_acl_clone(acl, GFP_KERNEL);
+ clone = posix_acl_clone(acl, GFP_NOFS);
error = -ENOMEM;
if (!clone)
goto cleanup;
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 -EOPNOTSUPP;
- if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+ if (!is_owner_or_cap(inode))
return -EPERM;
if (value) {
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