*
*/
-#include <linux/blkdev.h>
-#include <linux/buffer_head.h>
#include <linux/fs.h>
-#include <linux/nls.h>
#include <linux/posix_acl.h>
#include <linux/posix_acl_xattr.h>
#include <linux/xattr.h>
size_t add_bytes, const struct EA_INFO **info)
{
int err;
+ struct ntfs_sb_info *sbi = ni->mi.sbi;
struct ATTR_LIST_ENTRY *le = NULL;
struct ATTRIB *attr_info, *attr_ea;
void *ea_p;
/* Check Ea limit. */
size = le32_to_cpu((*info)->size);
- if (size > ni->mi.sbi->ea_max_size)
+ if (size > sbi->ea_max_size)
return -EFBIG;
- if (attr_size(attr_ea) > ni->mi.sbi->ea_max_size)
+ if (attr_size(attr_ea) > sbi->ea_max_size)
return -EFBIG;
/* Allocate memory for packed Ea. */
if (!ea_p)
return -ENOMEM;
- if (attr_ea->non_res) {
+ if (!size) {
+ ;
+ } else if (attr_ea->non_res) {
struct runs_tree run;
run_init(&run);
err = attr_load_runs(attr_ea, ni, &run, NULL);
if (!err)
- err = ntfs_read_run_nb(ni->mi.sbi, &run, 0, ea_p, size,
- NULL);
+ err = ntfs_read_run_nb(sbi, &run, 0, ea_p, size, NULL);
run_close(&run);
if (err)
static noinline int ntfs_set_ea(struct inode *inode, const char *name,
size_t name_len, const void *value,
- size_t val_size, int flags, int locked)
+ size_t val_size, int flags)
{
struct ntfs_inode *ni = ntfs_i(inode);
struct ntfs_sb_info *sbi = ni->mi.sbi;
u64 new_sz;
void *p;
- if (!locked)
- ni_lock(ni);
+ ni_lock(ni);
run_init(&ea_run);
new_ea->name[name_len] = 0;
memcpy(new_ea->name + name_len + 1, value, val_size);
new_pack = le16_to_cpu(ea_info.size_pack) + packed_ea_size(new_ea);
-
- /* Should fit into 16 bits. */
- if (new_pack > 0xffff) {
- err = -EFBIG; // -EINVAL?
- goto out;
- }
ea_info.size_pack = cpu_to_le16(new_pack);
-
/* New size of ATTR_EA. */
size += add;
- if (size > sbi->ea_max_size) {
+ ea_info.size = cpu_to_le32(size);
+
+ /*
+ * 1. Check ea_info.size_pack for overflow.
+ * 2. New attibute size must fit value from $AttrDef
+ */
+ if (new_pack > 0xffff || size > sbi->ea_max_size) {
+ ntfs_inode_warn(
+ inode,
+ "The size of extended attributes must not exceed 64KiB");
err = -EFBIG; // -EINVAL?
goto out;
}
- ea_info.size = cpu_to_le32(size);
update_ea:
/* Delete xattr, ATTR_EA */
ni_remove_attr_le(ni, attr, mi, le);
} else if (attr->non_res) {
- err = ntfs_sb_write_run(sbi, &ea_run, 0, ea_all, size);
+ err = ntfs_sb_write_run(sbi, &ea_run, 0, ea_all, size, 0);
if (err)
goto out;
} else {
mark_inode_dirty(&ni->vfs_inode);
out:
- if (!locked)
- ni_unlock(ni);
+ ni_unlock(ni);
run_close(&ea_run);
kfree(ea_all);
}
#ifdef CONFIG_NTFS3_FS_POSIX_ACL
-static inline void ntfs_posix_acl_release(struct posix_acl *acl)
-{
- if (acl && refcount_dec_and_test(&acl->a_refcount))
- kfree(acl);
-}
-
static struct posix_acl *ntfs_get_acl_ex(struct user_namespace *mnt_userns,
struct inode *inode, int type,
int locked)
/* Translate extended attribute to acl. */
if (err >= 0) {
acl = posix_acl_from_xattr(mnt_userns, buf, err);
- if (!IS_ERR(acl))
- set_cached_acl(inode, type, acl);
+ } else if (err == -ENODATA) {
+ acl = NULL;
} else {
- acl = err == -ENODATA ? NULL : ERR_PTR(err);
+ acl = ERR_PTR(err);
}
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
+
__putname(buf);
return acl;
static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
struct inode *inode, struct posix_acl *acl,
- int type, int locked)
+ int type)
{
const char *name;
size_t size, name_len;
void *value = NULL;
int err = 0;
+ int flags;
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
if (acl) {
umode_t mode = inode->i_mode;
- err = posix_acl_equiv_mode(acl, &mode);
- if (err < 0)
- return err;
+ err = posix_acl_update_mode(mnt_userns, inode, &mode,
+ &acl);
+ if (err)
+ goto out;
if (inode->i_mode != mode) {
inode->i_mode = mode;
mark_inode_dirty(inode);
}
-
- if (!err) {
- /*
- * ACL can be exactly represented in the
- * traditional file mode permission bits.
- */
- acl = NULL;
- }
}
name = XATTR_NAME_POSIX_ACL_ACCESS;
name_len = sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1;
}
if (!acl) {
+ /* Remove xattr if it can be presented via mode. */
size = 0;
value = NULL;
+ flags = XATTR_REPLACE;
} else {
size = posix_acl_xattr_size(acl->a_count);
value = kmalloc(size, GFP_NOFS);
if (!value)
return -ENOMEM;
-
err = posix_acl_to_xattr(mnt_userns, acl, value, size);
if (err < 0)
goto out;
+ flags = 0;
}
- err = ntfs_set_ea(inode, name, name_len, value, size, 0, locked);
+ err = ntfs_set_ea(inode, name, name_len, value, size, flags);
+ if (err == -ENODATA && !size)
+ err = 0; /* Removing non existed xattr. */
if (!err)
set_cached_acl(inode, type, acl);
int ntfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
struct posix_acl *acl, int type)
{
- return ntfs_set_acl_ex(mnt_userns, inode, acl, type, 0);
-}
-
-static int ntfs_xattr_get_acl(struct user_namespace *mnt_userns,
- struct inode *inode, int type, void *buffer,
- size_t size)
-{
- struct posix_acl *acl;
- int err;
-
- if (!(inode->i_sb->s_flags & SB_POSIXACL)) {
- ntfs_inode_warn(inode, "add mount option \"acl\" to use acl");
- return -EOPNOTSUPP;
- }
-
- acl = ntfs_get_acl(inode, type, false);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
-
- if (!acl)
- return -ENODATA;
-
- err = posix_acl_to_xattr(mnt_userns, acl, buffer, size);
- ntfs_posix_acl_release(acl);
-
- return err;
-}
-
-static int ntfs_xattr_set_acl(struct user_namespace *mnt_userns,
- struct inode *inode, int type, const void *value,
- size_t size)
-{
- struct posix_acl *acl;
- int err;
-
- if (!(inode->i_sb->s_flags & SB_POSIXACL)) {
- ntfs_inode_warn(inode, "add mount option \"acl\" to use acl");
- return -EOPNOTSUPP;
- }
-
- if (!inode_owner_or_capable(mnt_userns, inode))
- return -EPERM;
-
- if (!value) {
- acl = NULL;
- } else {
- acl = posix_acl_from_xattr(mnt_userns, value, size);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
-
- if (acl) {
- err = posix_acl_valid(mnt_userns, acl);
- if (err)
- goto release_and_out;
- }
- }
-
- err = ntfs_set_acl(mnt_userns, inode, acl, type);
-
-release_and_out:
- ntfs_posix_acl_release(acl);
- return err;
+ return ntfs_set_acl_ex(mnt_userns, inode, acl, type);
}
/*
struct posix_acl *default_acl, *acl;
int err;
- /*
- * TODO: Refactoring lock.
- * ni_lock(dir) ... -> posix_acl_create(dir,...) -> ntfs_get_acl -> ni_lock(dir)
- */
- inode->i_default_acl = NULL;
-
- default_acl = ntfs_get_acl_ex(mnt_userns, dir, ACL_TYPE_DEFAULT, 1);
-
- if (!default_acl || default_acl == ERR_PTR(-EOPNOTSUPP)) {
- inode->i_mode &= ~current_umask();
- err = 0;
- goto out;
- }
-
- if (IS_ERR(default_acl)) {
- err = PTR_ERR(default_acl);
- goto out;
- }
-
- acl = default_acl;
- err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
- if (err < 0)
- goto out1;
- if (!err) {
- posix_acl_release(acl);
- acl = NULL;
- }
+ err = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
+ if (err)
+ return err;
- if (!S_ISDIR(inode->i_mode)) {
+ if (default_acl) {
+ err = ntfs_set_acl_ex(mnt_userns, inode, default_acl,
+ ACL_TYPE_DEFAULT);
posix_acl_release(default_acl);
- default_acl = NULL;
+ } else {
+ inode->i_default_acl = NULL;
}
- if (default_acl)
- err = ntfs_set_acl_ex(mnt_userns, inode, default_acl,
- ACL_TYPE_DEFAULT, 1);
-
if (!acl)
inode->i_acl = NULL;
- else if (!err)
- err = ntfs_set_acl_ex(mnt_userns, inode, acl, ACL_TYPE_ACCESS,
- 1);
-
- posix_acl_release(acl);
-out1:
- posix_acl_release(default_acl);
+ else {
+ if (!err)
+ err = ntfs_set_acl_ex(mnt_userns, inode, acl,
+ ACL_TYPE_ACCESS);
+ posix_acl_release(acl);
+ }
-out:
return err;
}
#endif
int ntfs_permission(struct user_namespace *mnt_userns, struct inode *inode,
int mask)
{
- if (ntfs_sb(inode->i_sb)->options.no_acs_rules) {
+ if (ntfs_sb(inode->i_sb)->options->noacsrules) {
/* "No access rules" mode - Allow all changes. */
return 0;
}
goto out;
}
-#ifdef CONFIG_NTFS3_FS_POSIX_ACL
- if ((name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1 &&
- !memcmp(name, XATTR_NAME_POSIX_ACL_ACCESS,
- sizeof(XATTR_NAME_POSIX_ACL_ACCESS))) ||
- (name_len == sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1 &&
- !memcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT,
- sizeof(XATTR_NAME_POSIX_ACL_DEFAULT)))) {
- /* TODO: init_user_ns? */
- err = ntfs_xattr_get_acl(
- &init_user_ns, inode,
- name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1
- ? ACL_TYPE_ACCESS
- : ACL_TYPE_DEFAULT,
- buffer, size);
- goto out;
- }
-#endif
/* Deal with NTFS extended attribute. */
err = ntfs_get_ea(inode, name, name_len, buffer, size, NULL);
goto out;
}
-#ifdef CONFIG_NTFS3_FS_POSIX_ACL
- if ((name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1 &&
- !memcmp(name, XATTR_NAME_POSIX_ACL_ACCESS,
- sizeof(XATTR_NAME_POSIX_ACL_ACCESS))) ||
- (name_len == sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1 &&
- !memcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT,
- sizeof(XATTR_NAME_POSIX_ACL_DEFAULT)))) {
- err = ntfs_xattr_set_acl(
- mnt_userns, inode,
- name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1
- ? ACL_TYPE_ACCESS
- : ACL_TYPE_DEFAULT,
- value, size);
- goto out;
- }
-#endif
/* Deal with NTFS extended attribute. */
- err = ntfs_set_ea(inode, name, name_len, value, size, flags, 0);
+ err = ntfs_set_ea(inode, name, name_len, value, size, flags);
out:
return err;
int err;
__le32 value;
+ /* TODO: refactor this, so we don't lock 4 times in ntfs_set_ea */
value = cpu_to_le32(i_uid_read(inode));
err = ntfs_set_ea(inode, "$LXUID", sizeof("$LXUID") - 1, &value,
- sizeof(value), 0, 0);
+ sizeof(value), 0);
if (err)
goto out;
value = cpu_to_le32(i_gid_read(inode));
err = ntfs_set_ea(inode, "$LXGID", sizeof("$LXGID") - 1, &value,
- sizeof(value), 0, 0);
+ sizeof(value), 0);
if (err)
goto out;
value = cpu_to_le32(inode->i_mode);
err = ntfs_set_ea(inode, "$LXMOD", sizeof("$LXMOD") - 1, &value,
- sizeof(value), 0, 0);
+ sizeof(value), 0);
if (err)
goto out;
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
value = cpu_to_le32(inode->i_rdev);
err = ntfs_set_ea(inode, "$LXDEV", sizeof("$LXDEV") - 1, &value,
- sizeof(value), 0, 0);
+ sizeof(value), 0);
if (err)
goto out;
}
projects / linux-2.6-microblaze.git / blobdiff