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Merge branch 'lineage-17.1' into followmsi-10

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followmsi 2020-12-19 13:53:34 +01:00
commit 8c8560e60f
58 changed files with 1903 additions and 836 deletions
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2
Documentation/filesystems/Locking
View file

@ -59,7 +59,6 @@ prototypes:
ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
ssize_t (*listxattr) (struct dentry *, char *, size_t);
int (*removexattr) (struct dentry *, const char *);
void (*truncate_range)(struct inode *, loff_t, loff_t);
int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *,
@ -91,7 +90,6 @@ setxattr: yes
getxattr: no
listxattr: no
removexattr: yes
truncate_range: yes
fiemap: no
update_time: no
atomic_open: yes

13
Documentation/filesystems/vfs.txt
View file

@ -363,7 +363,6 @@ struct inode_operations {
ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
ssize_t (*listxattr) (struct dentry *, char *, size_t);
int (*removexattr) (struct dentry *, const char *);
void (*truncate_range)(struct inode *, loff_t, loff_t);
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *, struct file *,
unsigned open_flag, umode_t create_mode, int *opened);
@ -476,9 +475,6 @@ otherwise noted.
removexattr: called by the VFS to remove an extended attribute from
a file. This method is called by removexattr(2) system call.
truncate_range: a method provided by the underlying filesystem to truncate a
range of blocks , i.e. punch a hole somewhere in a file.
update_time: called by the VFS to update a specific time or the i_version of
an inode. If this is not defined the VFS will update the inode itself
and call mark_inode_dirty_sync.
@ -780,7 +776,7 @@ struct file_operations
----------------------
This describes how the VFS can manipulate an open file. As of kernel
2.6.22, the following members are defined:
3.5, the following members are defined:
struct file_operations {
struct module *owner;
@ -810,6 +806,8 @@ struct file_operations {
int (*flock) (struct file *, int, struct file_lock *);
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, size_t, unsigned int);
ssize_t (*splice_read)(struct file *, struct pipe_inode_info *, size_t, unsigned int);
int (*setlease)(struct file *, long arg, struct file_lock **);
long (*fallocate)(struct file *, int mode, loff_t offset, loff_t len);
};
Again, all methods are called without any locks being held, unless
@ -878,6 +876,11 @@ otherwise noted.
splice_read: called by the VFS to splice data from file to a pipe. This
method is used by the splice(2) system call
setlease: called by the VFS to set or release a file lock lease.
setlease has the file_lock_lock held and must not sleep.
fallocate: called by the VFS to preallocate blocks or punch a hole.
Note that the file operations are implemented by the specific
filesystem in which the inode resides. When opening a device node
(character or block special) most filesystems will call special

2
block/blk-ioc.c
View file

@ -350,7 +350,7 @@ struct io_cq *ioc_create_icq(struct request_queue *q, gfp_t gfp_mask)
if (!icq)
return NULL;
if (radix_tree_preload(gfp_mask) < 0) {
if (radix_tree_maybe_preload(gfp_mask) < 0) {
kmem_cache_free(et->icq_cache, icq);
return NULL;
}

8
drivers/staging/android/ashmem.c
View file

@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/falloc.h>
#include <linux/miscdevice.h>
#include <linux/security.h>
#include <linux/mm.h>
@ -374,11 +375,12 @@ static int ashmem_shrink(struct shrinker *s, struct shrink_control *sc)
return -1;
list_for_each_entry_safe(range, next, &ashmem_lru_list, lru) {
struct inode *inode = range->asma->file->f_dentry->d_inode;
loff_t start = range->pgstart * PAGE_SIZE;
loff_t end = (range->pgend + 1) * PAGE_SIZE - 1;
loff_t end = (range->pgend + 1) * PAGE_SIZE;
vmtruncate_range(inode, start, end);
do_fallocate(range->asma->file,
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
start, end - start);
range->purged = ASHMEM_WAS_PURGED;
lru_del(range);

12
fs/9p/acl.c
View file

@ -37,7 +37,7 @@ static struct posix_acl *__v9fs_get_acl(struct p9_fid *fid, char *name)
return ERR_PTR(-ENOMEM);
size = v9fs_fid_xattr_get(fid, name, value, size);
if (size > 0) {
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
goto err_out;
}
@ -131,7 +131,7 @@ static int v9fs_set_acl(struct dentry *dentry, int type, struct posix_acl *acl)
buffer = kmalloc(size, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
retval = posix_acl_to_xattr(acl, buffer, size);
retval = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
if (retval < 0)
goto err_free_out;
switch (type) {
@ -160,7 +160,7 @@ int v9fs_acl_chmod(struct dentry *dentry)
return -EOPNOTSUPP;
acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
if (acl) {
retval = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
retval = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (retval)
return retval;
retval = v9fs_set_acl(dentry, ACL_TYPE_ACCESS, acl);
@ -199,7 +199,7 @@ int v9fs_acl_mode(struct inode *dir, umode_t *modep,
if (acl) {
if (S_ISDIR(mode))
*dpacl = posix_acl_dup(acl);
retval = posix_acl_create(&acl, GFP_NOFS, &mode);
retval = __posix_acl_create(&acl, GFP_NOFS, &mode);
if (retval < 0)
return retval;
if (retval > 0)
@ -251,7 +251,7 @@ static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
return PTR_ERR(acl);
if (acl == NULL)
return -ENODATA;
error = posix_acl_to_xattr(acl, buffer, size);
error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return error;
@ -304,7 +304,7 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
return -EPERM;
if (value) {
/* update the cached acl value */
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
else if (acl) {

6
fs/Kconfig
View file

@ -81,10 +81,6 @@ config CUSE
If you want to develop or use userspace character device
based on CUSE, answer Y or M.
config GENERIC_ACL
bool
select FS_POSIX_ACL
menu "Caches"
source "fs/fscache/Kconfig"
@ -133,7 +129,7 @@ config TMPFS_POSIX_ACL
bool "Tmpfs POSIX Access Control Lists"
depends on TMPFS
select TMPFS_XATTR
select GENERIC_ACL
select FS_POSIX_ACL
help
POSIX Access Control Lists (ACLs) support additional access rights
for users and groups beyond the standard owner/group/world scheme,

3
fs/Makefile
View file

@ -46,9 +46,8 @@ obj-$(CONFIG_BINFMT_SOM) += binfmt_som.o
obj-$(CONFIG_BINFMT_FLAT) += binfmt_flat.o
obj-$(CONFIG_FS_MBCACHE) += mbcache.o
obj-$(CONFIG_FS_POSIX_ACL) += posix_acl.o xattr_acl.o
obj-$(CONFIG_FS_POSIX_ACL) += posix_acl.o
obj-$(CONFIG_NFS_COMMON) += nfs_common/
obj-$(CONFIG_GENERIC_ACL) += generic_acl.o
obj-$(CONFIG_FHANDLE) += fhandle.o

1
fs/bad_inode.c
View file

@ -292,7 +292,6 @@ static const struct inode_operations bad_inode_ops =
.getxattr = bad_inode_getxattr,
.listxattr = bad_inode_listxattr,
.removexattr = bad_inode_removexattr,
/* truncate_range returns void */
};

12
fs/btrfs/acl.c
View file

@ -61,7 +61,7 @@ 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);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
} else if (size == -ENOENT || size == -ENODATA || size == 0) {
/* FIXME, who returns -ENOENT? I think nobody */
acl = NULL;
@ -91,7 +91,7 @@ static int btrfs_xattr_acl_get(struct dentry *dentry, const char *name,
return PTR_ERR(acl);
if (acl == NULL)
return -ENODATA;
ret = posix_acl_to_xattr(acl, value, size);
ret = posix_acl_to_xattr(&init_user_ns, acl, value, size);
posix_acl_release(acl);
return ret;
@ -141,7 +141,7 @@ static int btrfs_set_acl(struct btrfs_trans_handle *trans,
goto out;
}
ret = posix_acl_to_xattr(acl, value, size);
ret = posix_acl_to_xattr(&init_user_ns, acl, value, size);
if (ret < 0)
goto out;
}
@ -169,7 +169,7 @@ static int btrfs_xattr_acl_set(struct dentry *dentry, const char *name,
return -EOPNOTSUPP;
if (value) {
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
@ -220,7 +220,7 @@ int btrfs_init_acl(struct btrfs_trans_handle *trans,
if (ret)
goto failed;
}
ret = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
ret = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
if (ret < 0)
return ret;
@ -250,7 +250,7 @@ int btrfs_acl_chmod(struct inode *inode)
if (IS_ERR_OR_NULL(acl))
return PTR_ERR(acl);
ret = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (ret)
return ret;
ret = btrfs_set_acl(NULL, inode, acl, ACL_TYPE_ACCESS);

8
fs/ext2/acl.c
View file

@ -252,7 +252,7 @@ ext2_init_acl(struct inode *inode, struct inode *dir)
if (error)
goto cleanup;
}
error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
if (error < 0)
return error;
if (error > 0) {
@ -292,7 +292,7 @@ ext2_acl_chmod(struct inode *inode)
acl = ext2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
error = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (error)
return error;
error = ext2_set_acl(inode, ACL_TYPE_ACCESS, acl);
@ -346,7 +346,7 @@ ext2_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer,
return PTR_ERR(acl);
if (acl == NULL)
return -ENODATA;
error = posix_acl_to_xattr(acl, buffer, size);
error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return error;
@ -367,7 +367,7 @@ ext2_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
else if (acl) {

8
fs/ext3/acl.c
View file

@ -255,7 +255,7 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
if (error)
goto cleanup;
}
error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
if (error < 0)
return error;
@ -298,7 +298,7 @@ ext3_acl_chmod(struct inode *inode)
acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
error = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (error)
return error;
retry:
@ -365,7 +365,7 @@ ext3_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer,
return PTR_ERR(acl);
if (acl == NULL)
return -ENODATA;
error = posix_acl_to_xattr(acl, buffer, size);
error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return error;
@ -388,7 +388,7 @@ ext3_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
else if (acl) {

8
fs/ext4/acl.c
View file

@ -259,7 +259,7 @@ ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
if (error)
goto cleanup;
}
error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
if (error < 0)
return error;
@ -303,7 +303,7 @@ ext4_acl_chmod(struct inode *inode)
acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
error = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (error)
return error;
retry:
@ -370,7 +370,7 @@ ext4_xattr_get_acl(struct dentry *dentry, const char *name, void *buffer,
return PTR_ERR(acl);
if (acl == NULL)
return -ENODATA;
error = posix_acl_to_xattr(acl, buffer, size);
error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return error;
@ -393,7 +393,7 @@ ext4_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
else if (acl) {

8
fs/f2fs/acl.c
View file

@ -272,7 +272,7 @@ int f2fs_init_acl(struct inode *inode, struct inode *dir, struct page *ipage,
if (error)
goto cleanup;
}
error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
if (error < 0)
return error;
if (error > 0)
@ -298,7 +298,7 @@ int f2fs_acl_chmod(struct inode *inode)
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
error = posix_acl_chmod(&acl, GFP_KERNEL, mode);
error = __posix_acl_chmod(&acl, GFP_KERNEL, mode);
if (error)
return error;
@ -343,7 +343,7 @@ static int f2fs_xattr_get_acl(struct dentry *dentry, const char *name,
return PTR_ERR(acl);
if (!acl)
return -ENODATA;
error = posix_acl_to_xattr(acl, buffer, size);
error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return error;
@ -365,7 +365,7 @@ static int f2fs_xattr_set_acl(struct dentry *dentry, const char *name,
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {

5
fs/fcntl.c
View file

@ -20,6 +20,7 @@
#include <linux/signal.h>
#include <linux/rcupdate.h>
#include <linux/pid_namespace.h>
#include <linux/shmem_fs.h>
#include <asm/poll.h>
#include <asm/siginfo.h>
@ -420,6 +421,10 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
case F_GETPIPE_SZ:
err = pipe_fcntl(filp, cmd, arg);
break;
case F_ADD_SEALS:
case F_GET_SEALS:
err = shmem_fcntl(filp, cmd, arg);
break;
default:
break;
}

2
fs/fscache/page.c
View file

@ -767,7 +767,7 @@ int __fscache_write_page(struct fscache_cookie *cookie,
fscache_release_write_op);
op->op.flags = FSCACHE_OP_ASYNC | (1 << FSCACHE_OP_WAITING);
ret = radix_tree_preload(gfp & ~__GFP_HIGHMEM);
ret = radix_tree_maybe_preload(gfp & ~__GFP_HIGHMEM);
if (ret < 0)
goto nomem_free;

180
fs/generic_acl.c
View file

@ -1,180 +0,0 @@
/*
* (C) 2005 Andreas Gruenbacher <agruen@suse.de>
*
* This file is released under the GPL.
*
* Generic ACL support for in-memory filesystems.
*/
#include <linux/sched.h>
#include <linux/gfp.h>
#include <linux/fs.h>
#include <linux/generic_acl.h>
#include <linux/posix_acl.h>
#include <linux/posix_acl_xattr.h>
static size_t
generic_acl_list(struct dentry *dentry, char *list, size_t list_size,
const char *name, size_t name_len, int type)
{
struct posix_acl *acl;
const char *xname;
size_t size;
acl = get_cached_acl(dentry->d_inode, type);
if (!acl)
return 0;
posix_acl_release(acl);
switch (type) {
case ACL_TYPE_ACCESS:
xname = POSIX_ACL_XATTR_ACCESS;
break;
case ACL_TYPE_DEFAULT:
xname = POSIX_ACL_XATTR_DEFAULT;
break;
default:
return 0;
}
size = strlen(xname) + 1;
if (list && size <= list_size)
memcpy(list, xname, size);
return size;
}
static int
generic_acl_get(struct dentry *dentry, const char *name, void *buffer,
size_t size, int type)
{
struct posix_acl *acl;
int error;
if (strcmp(name, "") != 0)
return -EINVAL;
acl = get_cached_acl(dentry->d_inode, type);
if (!acl)
return -ENODATA;
error = posix_acl_to_xattr(acl, buffer, size);
posix_acl_release(acl);
return error;
}
static int
generic_acl_set(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags, int type)
{
struct inode *inode = dentry->d_inode;
struct posix_acl *acl = NULL;
int error;
if (strcmp(name, "") != 0)
return -EINVAL;
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
if (!inode_owner_or_capable(inode))
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
}
if (acl) {
error = posix_acl_valid(acl);
if (error)
goto failed;
switch (type) {
case ACL_TYPE_ACCESS:
error = posix_acl_update_mode(inode, &inode->i_mode, &acl);
if (error)
goto failed;
inode->i_ctime = CURRENT_TIME;
break;
case ACL_TYPE_DEFAULT:
if (!S_ISDIR(inode->i_mode)) {
error = -EINVAL;
goto failed;
}
break;
}
}
set_cached_acl(inode, type, acl);
error = 0;
failed:
posix_acl_release(acl);
return error;
}
/**
* generic_acl_init - Take care of acl inheritance at @inode create time
*
* Files created inside a directory with a default ACL inherit the
* directory's default ACL.
*/
int
generic_acl_init(struct inode *inode, struct inode *dir)
{
struct posix_acl *acl = NULL;
int error;
if (!S_ISLNK(inode->i_mode))
acl = get_cached_acl(dir, ACL_TYPE_DEFAULT);
if (acl) {
if (S_ISDIR(inode->i_mode))
set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
if (error < 0)
return error;
if (error > 0)
set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
} else {
inode->i_mode &= ~current_umask();
}
error = 0;
posix_acl_release(acl);
return error;
}
/**
* generic_acl_chmod - change the access acl of @inode upon chmod()
*
* A chmod also changes the permissions of the owner, group/mask, and
* other ACL entries.
*/
int
generic_acl_chmod(struct inode *inode)
{
struct posix_acl *acl;
int error = 0;
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
if (acl) {
error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (error)
return error;
set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
posix_acl_release(acl);
}
return error;
}
const struct xattr_handler generic_acl_access_handler = {
.prefix = POSIX_ACL_XATTR_ACCESS,
.flags = ACL_TYPE_ACCESS,
.list = generic_acl_list,
.get = generic_acl_get,
.set = generic_acl_set,
};
const struct xattr_handler generic_acl_default_handler = {
.prefix = POSIX_ACL_XATTR_DEFAULT,
.flags = ACL_TYPE_DEFAULT,
.list = generic_acl_list,
.get = generic_acl_get,
.set = generic_acl_set,
};

18
fs/gfs2/acl.c
View file

@ -63,7 +63,7 @@ struct posix_acl *gfs2_get_acl(struct inode *inode, int type)
if (len == 0)
return NULL;
acl = posix_acl_from_xattr(data, len);
acl = posix_acl_from_xattr(&init_user_ns, data, len);
kfree(data);
return acl;
}
@ -92,13 +92,13 @@ static int gfs2_acl_set(struct inode *inode, int type, struct posix_acl *acl)
const char *name = gfs2_acl_name(type);
BUG_ON(name == NULL);
len = posix_acl_to_xattr(acl, NULL, 0);
len = posix_acl_to_xattr(&init_user_ns, acl, NULL, 0);
if (len == 0)
return 0;
data = kmalloc(len, GFP_NOFS);
if (data == NULL)
return -ENOMEM;
error = posix_acl_to_xattr(acl, data, len);
error = posix_acl_to_xattr(&init_user_ns, acl, data, len);
if (error < 0)
goto out;
error = __gfs2_xattr_set(inode, name, data, len, 0, GFS2_EATYPE_SYS);
@ -137,7 +137,7 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
goto out;
}
error = posix_acl_create(&acl, GFP_NOFS, &mode);
error = __posix_acl_create(&acl, GFP_NOFS, &mode);
if (error < 0)
return error;
@ -168,16 +168,16 @@ int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr)
if (!acl)
return gfs2_setattr_simple(inode, attr);
error = posix_acl_chmod(&acl, GFP_NOFS, attr->ia_mode);
error = __posix_acl_chmod(&acl, GFP_NOFS, attr->ia_mode);
if (error)
return error;
len = posix_acl_to_xattr(acl, NULL, 0);
len = posix_acl_to_xattr(&init_user_ns, acl, NULL, 0);
data = kmalloc(len, GFP_NOFS);
error = -ENOMEM;
if (data == NULL)
goto out;
posix_acl_to_xattr(acl, data, len);
posix_acl_to_xattr(&init_user_ns, acl, data, len);
error = gfs2_xattr_acl_chmod(ip, attr, data);
kfree(data);
set_cached_acl(&ip->i_inode, ACL_TYPE_ACCESS, acl);
@ -218,7 +218,7 @@ static int gfs2_xattr_system_get(struct dentry *dentry, const char *name,
if (acl == NULL)
return -ENODATA;
error = posix_acl_to_xattr(acl, buffer, size);
error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return error;
@ -251,7 +251,7 @@ static int gfs2_xattr_system_set(struct dentry *dentry, const char *name,
if (!value)
goto set_acl;
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (!acl) {
/*
* acl_set_file(3) may request that we set default ACLs with

1
fs/inode.c
View file

@ -164,6 +164,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
mapping->a_ops = &empty_aops;
mapping->host = inode;
mapping->flags = 0;
atomic_set(&mapping->i_mmap_writable, 0);
mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
mapping->assoc_mapping = NULL;
mapping->backing_dev_info = &default_backing_dev_info;

8
fs/jffs2/acl.c
View file

@ -280,7 +280,7 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, umode_t *i_mode
if (S_ISDIR(*i_mode))
set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
rc = posix_acl_create(&acl, GFP_KERNEL, i_mode);
rc = __posix_acl_create(&acl, GFP_KERNEL, i_mode);
if (rc < 0)
return rc;
if (rc > 0)
@ -320,7 +320,7 @@ int jffs2_acl_chmod(struct inode *inode)
acl = jffs2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
rc = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
rc = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (rc)
return rc;
rc = jffs2_set_acl(inode, ACL_TYPE_ACCESS, acl);
@ -362,7 +362,7 @@ static int jffs2_acl_getxattr(struct dentry *dentry, const char *name,
return PTR_ERR(acl);
if (!acl)
return -ENODATA;
rc = posix_acl_to_xattr(acl, buffer, size);
rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return rc;
@ -380,7 +380,7 @@ static int jffs2_acl_setxattr(struct dentry *dentry, const char *name,
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl) {

8
fs/jfs/acl.c
View file

@ -64,7 +64,7 @@ struct posix_acl *jfs_get_acl(struct inode *inode, int type)
else
acl = ERR_PTR(size);
} else {
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
}
kfree(value);
if (!IS_ERR(acl))
@ -100,7 +100,7 @@ static int jfs_set_acl(tid_t tid, struct inode *inode, int type,
value = kmalloc(size, GFP_KERNEL);
if (!value)
return -ENOMEM;
rc = posix_acl_to_xattr(acl, value, size);
rc = posix_acl_to_xattr(&init_user_ns, acl, value, size);
if (rc < 0)
goto out;
}
@ -132,7 +132,7 @@ int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
if (rc)
goto cleanup;
}
rc = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
rc = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
if (rc < 0)
goto cleanup; /* posix_acl_release(NULL) is no-op */
if (rc > 0)
@ -161,7 +161,7 @@ int jfs_acl_chmod(struct inode *inode)
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
rc = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
rc = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (rc)
return rc;

4
fs/jfs/xattr.c
View file

@ -685,7 +685,7 @@ static int can_set_system_xattr(struct inode *inode, const char *name,
* POSIX_ACL_XATTR_ACCESS is tied to i_mode
*/
if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0) {
acl = posix_acl_from_xattr(value, value_len);
acl = posix_acl_from_xattr(&init_user_ns, value, value_len);
if (IS_ERR(acl)) {
rc = PTR_ERR(acl);
printk(KERN_ERR "posix_acl_from_xattr returned %d\n",
@ -710,7 +710,7 @@ static int can_set_system_xattr(struct inode *inode, const char *name,
return 0;
} else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0) {
acl = posix_acl_from_xattr(value, value_len);
acl = posix_acl_from_xattr(&init_user_ns, value, value_len);
if (IS_ERR(acl)) {
rc = PTR_ERR(acl);
printk(KERN_ERR "posix_acl_from_xattr returned %d\n",

20
fs/namei.c
View file

@ -230,27 +230,9 @@ static int check_acl(struct inode *inode, int mask)
return posix_acl_permission(inode, acl, mask & ~MAY_NOT_BLOCK);
}
acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
/*
* A filesystem can force a ACL callback by just never filling the
* ACL cache. But normally you'd fill the cache either at inode
* instantiation time, or on the first ->get_acl call.
*
* If the filesystem doesn't have a get_acl() function at all, we'll
* just create the negative cache entry.
*/
if (acl == ACL_NOT_CACHED) {
if (inode->i_op->get_acl) {
acl = inode->i_op->get_acl(inode, ACL_TYPE_ACCESS);
acl = get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))
return PTR_ERR(acl);
} else {
set_cached_acl(inode, ACL_TYPE_ACCESS, NULL);
return -EAGAIN;
}
}
if (acl) {
int error = posix_acl_permission(inode, acl, mask);
posix_acl_release(acl);

6
fs/nfs/nfs3acl.c
View file

@ -70,7 +70,7 @@ ssize_t nfs3_getxattr(struct dentry *dentry, const char *name,
if (type == ACL_TYPE_ACCESS && acl->a_count == 0)
error = -ENODATA;
else
error = posix_acl_to_xattr(acl, buffer, size);
error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
} else
error = -ENODATA;
@ -92,7 +92,7 @@ int nfs3_setxattr(struct dentry *dentry, const char *name,
else
return -EOPNOTSUPP;
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
error = nfs3_proc_setacl(inode, type, acl);
@ -428,7 +428,7 @@ int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
if (!dfacl)
return 0;
acl = posix_acl_dup(dfacl);
error = posix_acl_create(&acl, GFP_KERNEL, &mode);
error = __posix_acl_create(&acl, GFP_KERNEL, &mode);
if (error < 0)
goto out_release_dfacl;
error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ?

8
fs/nfsd/vfs.c
View file

@ -517,7 +517,7 @@ set_nfsv4_acl_one(struct dentry *dentry, struct posix_acl *pacl, char *key)
if (buf == NULL)
goto out;
len = posix_acl_to_xattr(pacl, buf, buflen);
len = posix_acl_to_xattr(&init_user_ns, pacl, buf, buflen);
if (len < 0) {
error = len;
goto out;
@ -586,7 +586,7 @@ _get_posix_acl(struct dentry *dentry, char *key)
if (buflen <= 0)
return ERR_PTR(buflen);
pacl = posix_acl_from_xattr(buf, buflen);
pacl = posix_acl_from_xattr(&init_user_ns, buf, buflen);
kfree(buf);
return pacl;
}
@ -2299,7 +2299,7 @@ nfsd_get_posix_acl(struct svc_fh *fhp, int type)
if (size < 0)
return ERR_PTR(size);
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
kfree(value);
return acl;
}
@ -2332,7 +2332,7 @@ nfsd_set_posix_acl(struct svc_fh *fhp, int type, struct posix_acl *acl)
value = kmalloc(size, GFP_KERNEL);
if (!value)
return -ENOMEM;
error = posix_acl_to_xattr(acl, value, size);
error = posix_acl_to_xattr(&init_user_ns, acl, value, size);
if (error < 0)
goto getout;
size = error;

8
fs/ocfs2/acl.c
View file

@ -321,7 +321,7 @@ int ocfs2_acl_chmod(struct inode *inode)
acl = ocfs2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
ret = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (ret)
return ret;
ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
@ -372,7 +372,7 @@ int ocfs2_init_acl(handle_t *handle,
goto cleanup;
}
mode = inode->i_mode;
ret = posix_acl_create(&acl, GFP_NOFS, &mode);
ret = __posix_acl_create(&acl, GFP_NOFS, &mode);
if (ret < 0)
return ret;
@ -446,7 +446,7 @@ static int ocfs2_xattr_get_acl(struct dentry *dentry, const char *name,
return PTR_ERR(acl);
if (acl == NULL)
return -ENODATA;
ret = posix_acl_to_xattr(acl, buffer, size);
ret = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return ret;
@ -469,7 +469,7 @@ static int ocfs2_xattr_set_acl(struct dentry *dentry, const char *name,
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl))
return PTR_ERR(acl);
else if (acl) {

451
fs/posix_acl.c
View file

@ -1,7 +1,5 @@
/*
* linux/fs/posix_acl.c
*
* Copyright (C) 2002 by Andreas Gruenbacher <a.gruenbacher@computer.org>
* Copyright (C) 2002,2003 by Andreas Gruenbacher <a.gruenbacher@computer.org>
*
* Fixes from William Schumacher incorporated on 15 March 2001.
* (Reported by Charles Bertsch, <CBertsch@microtest.com>).
@ -18,9 +16,10 @@
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/posix_acl.h>
#include <linux/posix_acl_xattr.h>
#include <linux/xattr.h>
#include <linux/export.h>
#include <linux/errno.h>
#include <linux/user_namespace.h>
EXPORT_SYMBOL(posix_acl_init);
EXPORT_SYMBOL(posix_acl_alloc);
@ -28,6 +27,33 @@ EXPORT_SYMBOL(posix_acl_valid);
EXPORT_SYMBOL(posix_acl_equiv_mode);
EXPORT_SYMBOL(posix_acl_from_mode);
struct posix_acl *get_acl(struct inode *inode, int type)
{
struct posix_acl *acl;
acl = get_cached_acl(inode, type);
if (acl != ACL_NOT_CACHED)
return acl;
if (!IS_POSIXACL(inode))
return NULL;
/*
* A filesystem can force a ACL callback by just never filling the
* ACL cache. But normally you'd fill the cache either at inode
* instantiation time, or on the first ->get_acl call.
*
* If the filesystem doesn't have a get_acl() function at all, we'll
* just create the negative cache entry.
*/
if (!inode->i_op->get_acl) {
set_cached_acl(inode, type, NULL);
return NULL;
}
return inode->i_op->get_acl(inode, type);
}
EXPORT_SYMBOL(get_acl);
/*
* Init a fresh posix_acl
*/
@ -78,7 +104,6 @@ posix_acl_valid(const struct posix_acl *acl)
{
const struct posix_acl_entry *pa, *pe;
int state = ACL_USER_OBJ;
unsigned int id = 0; /* keep gcc happy */
int needs_mask = 0;
FOREACH_ACL_ENTRY(pa, acl, pe) {
@ -87,7 +112,6 @@ posix_acl_valid(const struct posix_acl *acl)
switch (pa->e_tag) {
case ACL_USER_OBJ:
if (state == ACL_USER_OBJ) {
id = 0;
state = ACL_USER;
break;
}
@ -96,16 +120,13 @@ posix_acl_valid(const struct posix_acl *acl)
case ACL_USER:
if (state != ACL_USER)
return -EINVAL;
if (pa->e_id == ACL_UNDEFINED_ID ||
pa->e_id < id)
if (!uid_valid(pa->e_uid))
return -EINVAL;
id = pa->e_id + 1;
needs_mask = 1;
break;
case ACL_GROUP_OBJ:
if (state == ACL_USER) {
id = 0;
state = ACL_GROUP;
break;
}
@ -114,10 +135,8 @@ posix_acl_valid(const struct posix_acl *acl)
case ACL_GROUP:
if (state != ACL_GROUP)
return -EINVAL;
if (pa->e_id == ACL_UNDEFINED_ID ||
pa->e_id < id)
if (!gid_valid(pa->e_gid))
return -EINVAL;
id = pa->e_id + 1;
needs_mask = 1;
break;
@ -201,15 +220,12 @@ posix_acl_from_mode(umode_t mode, gfp_t flags)
return ERR_PTR(-ENOMEM);
acl->a_entries[0].e_tag = ACL_USER_OBJ;
acl->a_entries[0].e_id = ACL_UNDEFINED_ID;
acl->a_entries[0].e_perm = (mode & S_IRWXU) >> 6;
acl->a_entries[1].e_tag = ACL_GROUP_OBJ;
acl->a_entries[1].e_id = ACL_UNDEFINED_ID;
acl->a_entries[1].e_perm = (mode & S_IRWXG) >> 3;
acl->a_entries[2].e_tag = ACL_OTHER;
acl->a_entries[2].e_id = ACL_UNDEFINED_ID;
acl->a_entries[2].e_perm = (mode & S_IRWXO);
return acl;
}
@ -230,11 +246,11 @@ posix_acl_permission(struct inode *inode, const struct posix_acl *acl, int want)
switch(pa->e_tag) {
case ACL_USER_OBJ:
/* (May have been checked already) */
if (inode->i_uid == current_fsuid())
if (uid_eq(inode->i_uid, current_fsuid()))
goto check_perm;
break;
case ACL_USER:
if (pa->e_id == current_fsuid())
if (uid_eq(pa->e_uid, current_fsuid()))
goto mask;
break;
case ACL_GROUP_OBJ:
@ -245,7 +261,7 @@ posix_acl_permission(struct inode *inode, const struct posix_acl *acl, int want)
}
break;
case ACL_GROUP:
if (in_group_p(pa->e_id)) {
if (in_group_p(pa->e_gid)) {
found = 1;
if ((pa->e_perm & want) == want)
goto mask;
@ -375,7 +391,7 @@ EXPORT_SYMBOL(posix_acl_update_mode);
/*
* Modify the ACL for the chmod syscall.
*/
static int posix_acl_chmod_masq(struct posix_acl *acl, umode_t mode)
static int __posix_acl_chmod_masq(struct posix_acl *acl, umode_t mode)
{
struct posix_acl_entry *group_obj = NULL, *mask_obj = NULL;
struct posix_acl_entry *pa, *pe;
@ -421,7 +437,7 @@ static int posix_acl_chmod_masq(struct posix_acl *acl, umode_t mode)
}
int
posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
__posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
{
struct posix_acl *clone = posix_acl_clone(*acl, gfp);
int err = -ENOMEM;
@ -436,15 +452,15 @@ posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
*acl = clone;
return err;
}
EXPORT_SYMBOL(posix_acl_create);
EXPORT_SYMBOL(__posix_acl_create);
int
posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
__posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
{
struct posix_acl *clone = posix_acl_clone(*acl, gfp);
int err = -ENOMEM;
if (clone) {
err = posix_acl_chmod_masq(clone, mode);
err = __posix_acl_chmod_masq(clone, mode);
if (err) {
posix_acl_release(clone);
clone = NULL;
@ -454,4 +470,389 @@ posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
*acl = clone;
return err;
}
EXPORT_SYMBOL(__posix_acl_chmod);
int
posix_acl_chmod(struct inode *inode, umode_t mode)
{
struct posix_acl *acl;
int ret = 0;
if (!IS_POSIXACL(inode))
return 0;
if (!inode->i_op->set_acl)
return -EOPNOTSUPP;
acl = get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR_OR_NULL(acl)) {
if (acl == ERR_PTR(-EOPNOTSUPP))
return 0;
return PTR_ERR(acl);
}
ret = __posix_acl_chmod(&acl, GFP_KERNEL, mode);
if (ret)
return ret;
ret = inode->i_op->set_acl(inode, acl, ACL_TYPE_ACCESS);
posix_acl_release(acl);
return ret;
}
EXPORT_SYMBOL(posix_acl_chmod);
int
posix_acl_create(struct inode *dir, umode_t *mode,
struct posix_acl **default_acl, struct posix_acl **acl)
{
struct posix_acl *p;
int ret;
if (S_ISLNK(*mode) || !IS_POSIXACL(dir))
goto no_acl;
p = get_acl(dir, ACL_TYPE_DEFAULT);
if (IS_ERR(p)) {
if (p == ERR_PTR(-EOPNOTSUPP))
goto apply_umask;
return PTR_ERR(p);
}
if (!p)
goto apply_umask;
*acl = posix_acl_clone(p, GFP_NOFS);
if (!*acl)
return -ENOMEM;
ret = posix_acl_create_masq(*acl, mode);
if (ret < 0) {
posix_acl_release(*acl);
return -ENOMEM;
}
if (ret == 0) {
posix_acl_release(*acl);
*acl = NULL;
}
if (!S_ISDIR(*mode)) {
posix_acl_release(p);
*default_acl = NULL;
} else {
*default_acl = p;
}
return 0;
apply_umask:
*mode &= ~current_umask();
no_acl:
*default_acl = NULL;
*acl = NULL;
return 0;
}
EXPORT_SYMBOL_GPL(posix_acl_create);
/*
* Fix up the uids and gids in posix acl extended attributes in place.
*/
static void posix_acl_fix_xattr_userns(
struct user_namespace *to, struct user_namespace *from,
void *value, size_t size)
{
posix_acl_xattr_header *header = (posix_acl_xattr_header *)value;
posix_acl_xattr_entry *entry = (posix_acl_xattr_entry *)(header+1), *end;
int count;
kuid_t uid;
kgid_t gid;
if (!value)
return;
if (size < sizeof(posix_acl_xattr_header))
return;
if (header->a_version != cpu_to_le32(POSIX_ACL_XATTR_VERSION))
return;
count = posix_acl_xattr_count(size);
if (count < 0)
return;
if (count == 0)
return;
for (end = entry + count; entry != end; entry++) {
switch(le16_to_cpu(entry->e_tag)) {
case ACL_USER:
uid = make_kuid(from, le32_to_cpu(entry->e_id));
entry->e_id = cpu_to_le32(from_kuid(to, uid));
break;
case ACL_GROUP:
gid = make_kgid(from, le32_to_cpu(entry->e_id));
entry->e_id = cpu_to_le32(from_kgid(to, gid));
break;
default:
break;
}
}
}
void posix_acl_fix_xattr_from_user(void *value, size_t size)
{
struct user_namespace *user_ns = current_user_ns();
if (user_ns == &init_user_ns)
return;
posix_acl_fix_xattr_userns(&init_user_ns, user_ns, value, size);
}
void posix_acl_fix_xattr_to_user(void *value, size_t size)
{
struct user_namespace *user_ns = current_user_ns();
if (user_ns == &init_user_ns)
return;
posix_acl_fix_xattr_userns(user_ns, &init_user_ns, value, size);
}
/*
* Convert from extended attribute to in-memory representation.
*/
struct posix_acl *
posix_acl_from_xattr(struct user_namespace *user_ns,
const void *value, size_t size)
{
posix_acl_xattr_header *header = (posix_acl_xattr_header *)value;
posix_acl_xattr_entry *entry = (posix_acl_xattr_entry *)(header+1), *end;
int count;
struct posix_acl *acl;
struct posix_acl_entry *acl_e;
if (!value)
return NULL;
if (size < sizeof(posix_acl_xattr_header))
return ERR_PTR(-EINVAL);
if (header->a_version != cpu_to_le32(POSIX_ACL_XATTR_VERSION))
return ERR_PTR(-EOPNOTSUPP);
count = posix_acl_xattr_count(size);
if (count < 0)
return ERR_PTR(-EINVAL);
if (count == 0)
return NULL;
acl = posix_acl_alloc(count, GFP_NOFS);
if (!acl)
return ERR_PTR(-ENOMEM);
acl_e = acl->a_entries;
for (end = entry + count; entry != end; acl_e++, entry++) {
acl_e->e_tag = le16_to_cpu(entry->e_tag);
acl_e->e_perm = le16_to_cpu(entry->e_perm);
switch(acl_e->e_tag) {
case ACL_USER_OBJ:
case ACL_GROUP_OBJ:
case ACL_MASK:
case ACL_OTHER:
break;
case ACL_USER:
acl_e->e_uid =
make_kuid(user_ns,
le32_to_cpu(entry->e_id));
if (!uid_valid(acl_e->e_uid))
goto fail;
break;
case ACL_GROUP:
acl_e->e_gid =
make_kgid(user_ns,
le32_to_cpu(entry->e_id));
if (!gid_valid(acl_e->e_gid))
goto fail;
break;
default:
goto fail;
}
}
return acl;
fail:
posix_acl_release(acl);
return ERR_PTR(-EINVAL);
}
EXPORT_SYMBOL (posix_acl_from_xattr);
/*
* Convert from in-memory to extended attribute representation.
*/
int
posix_acl_to_xattr(struct user_namespace *user_ns, const struct posix_acl *acl,
void *buffer, size_t size)
{
posix_acl_xattr_header *ext_acl = (posix_acl_xattr_header *)buffer;
posix_acl_xattr_entry *ext_entry;
int real_size, n;
real_size = posix_acl_xattr_size(acl->a_count);
if (!buffer)
return real_size;
if (real_size > size)
return -ERANGE;
ext_entry = ext_acl->a_entries;
ext_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION);
for (n=0; n < acl->a_count; n++, ext_entry++) {
const struct posix_acl_entry *acl_e = &acl->a_entries[n];
ext_entry->e_tag = cpu_to_le16(acl_e->e_tag);
ext_entry->e_perm = cpu_to_le16(acl_e->e_perm);
switch(acl_e->e_tag) {
case ACL_USER:
ext_entry->e_id =
cpu_to_le32(from_kuid(user_ns, acl_e->e_uid));
break;
case ACL_GROUP:
ext_entry->e_id =
cpu_to_le32(from_kgid(user_ns, acl_e->e_gid));
break;
default:
ext_entry->e_id = cpu_to_le32(ACL_UNDEFINED_ID);
break;
}
}
return real_size;
}
EXPORT_SYMBOL (posix_acl_to_xattr);
static int
posix_acl_xattr_get(struct dentry *dentry, const char *name,
void *value, size_t size, int type)
{
struct posix_acl *acl;
int error;
if (!IS_POSIXACL(dentry->d_inode))
return -EOPNOTSUPP;
if (S_ISLNK(dentry->d_inode->i_mode))
return -EOPNOTSUPP;
acl = 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, value, size);
posix_acl_release(acl);
return error;
}
static int
posix_acl_xattr_set(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags, int type)
{
struct inode *inode = dentry->d_inode;
struct posix_acl *acl = NULL;
int ret;
if (!IS_POSIXACL(inode))
return -EOPNOTSUPP;
if (!inode->i_op->set_acl)
return -EOPNOTSUPP;
if (type == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode))
return value ? -EACCES : 0;
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);
if (acl) {
ret = posix_acl_valid(acl);
if (ret)
goto out;
}
}
ret = inode->i_op->set_acl(inode, acl, type);
out:
posix_acl_release(acl);
return ret;
}
static size_t
posix_acl_xattr_list(struct dentry *dentry, char *list, size_t list_size,
const char *name, size_t name_len, int type)
{
const char *xname;
size_t size;
if (!IS_POSIXACL(dentry->d_inode))
return -EOPNOTSUPP;
if (S_ISLNK(dentry->d_inode->i_mode))
return -EOPNOTSUPP;
if (type == ACL_TYPE_ACCESS)
xname = POSIX_ACL_XATTR_ACCESS;
else
xname = POSIX_ACL_XATTR_DEFAULT;
size = strlen(xname) + 1;
if (list && size <= list_size)
memcpy(list, xname, size);
return size;
}
const struct xattr_handler posix_acl_access_xattr_handler = {
.prefix = POSIX_ACL_XATTR_ACCESS,
.flags = ACL_TYPE_ACCESS,
.list = posix_acl_xattr_list,
.get = posix_acl_xattr_get,
.set = posix_acl_xattr_set,
};
EXPORT_SYMBOL_GPL(posix_acl_access_xattr_handler);
const struct xattr_handler posix_acl_default_xattr_handler = {
.prefix = POSIX_ACL_XATTR_DEFAULT,
.flags = ACL_TYPE_DEFAULT,
.list = posix_acl_xattr_list,
.get = posix_acl_xattr_get,
.set = posix_acl_xattr_set,
};
EXPORT_SYMBOL_GPL(posix_acl_default_xattr_handler);
int simple_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
int error;
if (type == ACL_TYPE_ACCESS) {
error = posix_acl_equiv_mode(acl, &inode->i_mode);
if (error < 0)
return 0;
if (error == 0)
acl = NULL;
}
inode->i_ctime = CURRENT_TIME;
set_cached_acl(inode, type, acl);
return 0;
}
int simple_acl_create(struct inode *dir, struct inode *inode)
{
struct posix_acl *default_acl, *acl;
int error;
error = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
if (error)
return error;
set_cached_acl(inode, ACL_TYPE_DEFAULT, default_acl);
set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
if (default_acl)
posix_acl_release(default_acl);
if (acl)
posix_acl_release(acl);
return 0;
}

8
fs/reiserfs/xattr_acl.c
View file

@ -30,7 +30,7 @@ posix_acl_set(struct dentry *dentry, const char *name, const void *value,
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (IS_ERR(acl)) {
return PTR_ERR(acl);
} else if (acl) {
@ -77,7 +77,7 @@ posix_acl_get(struct dentry *dentry, const char *name, void *buffer,
return PTR_ERR(acl);
if (acl == NULL)
return -ENODATA;
error = posix_acl_to_xattr(acl, buffer, size);
error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
posix_acl_release(acl);
return error;
@ -358,7 +358,7 @@ reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
/* Now we reconcile the new ACL and the mode,
potentially modifying both */
err = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
if (err < 0)
return err;
@ -440,7 +440,7 @@ int reiserfs_acl_chmod(struct inode *inode)
return 0;
if (IS_ERR(acl))
return PTR_ERR(acl);
error = posix_acl_chmod(&acl, GFP_NOFS, inode->i_mode);
error = __posix_acl_chmod(&acl, GFP_NOFS, inode->i_mode);
if (error)
return error;

217
fs/xattr.c
View file

@ -20,6 +20,7 @@
#include <linux/fsnotify.h>
#include <linux/audit.h>
#include <linux/vmalloc.h>
#include <linux/posix_acl_xattr.h>
#include <asm/uaccess.h>
@ -295,11 +296,13 @@ vfs_removexattr(struct dentry *dentry, const char *name)
if (error)
return error;
error = security_inode_removexattr(dentry, name);
if (error)
return error;
mutex_lock(&inode->i_mutex);
error = security_inode_removexattr(dentry, name);
if (error) {
mutex_unlock(&inode->i_mutex);
return error;
}
error = inode->i_op->removexattr(dentry, name);
mutex_unlock(&inode->i_mutex);
@ -347,6 +350,9 @@ setxattr(struct dentry *d, const char __user *name, const void __user *value,
error = -EFAULT;
goto out;
}
if ((strcmp(kname, XATTR_NAME_POSIX_ACL_ACCESS) == 0) ||
(strcmp(kname, XATTR_NAME_POSIX_ACL_DEFAULT) == 0))
posix_acl_fix_xattr_from_user(kvalue, size);
}
error = vfs_setxattr(d, kname, kvalue, size, flags);
@ -399,11 +405,12 @@ SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname,
SYSCALL_DEFINE5(fsetxattr, int, fd, const char __user *, name,
const void __user *,value, size_t, size, int, flags)
{
int fput_needed;
struct file *f;
struct dentry *dentry;
int error = -EBADF;
f = fget(fd);
f = fget_light(fd, &fput_needed);
if (!f)
return error;
dentry = f->f_path.dentry;
@ -413,7 +420,7 @@ SYSCALL_DEFINE5(fsetxattr, int, fd, const char __user *, name,
error = setxattr(dentry, name, value, size, flags);
mnt_drop_write_file(f);
}
fput(f);
fput_light(f, fput_needed);
return error;
}
@ -444,6 +451,9 @@ getxattr(struct dentry *d, const char __user *name, void __user *value,
error = vfs_getxattr(d, kname, kvalue, size);
if (error > 0) {
if ((strcmp(kname, XATTR_NAME_POSIX_ACL_ACCESS) == 0) ||
(strcmp(kname, XATTR_NAME_POSIX_ACL_DEFAULT) == 0))
posix_acl_fix_xattr_to_user(kvalue, size);
if (size && copy_to_user(value, kvalue, error))
error = -EFAULT;
} else if (error == -ERANGE && size >= XATTR_SIZE_MAX) {
@ -486,15 +496,16 @@ SYSCALL_DEFINE4(lgetxattr, const char __user *, pathname,
SYSCALL_DEFINE4(fgetxattr, int, fd, const char __user *, name,
void __user *, value, size_t, size)
{
int fput_needed;
struct file *f;
ssize_t error = -EBADF;
f = fget(fd);
f = fget_light(fd, &fput_needed);
if (!f)
return error;
audit_inode(NULL, f->f_path.dentry);
error = getxattr(f->f_path.dentry, name, value, size);
fput(f);
fput_light(f, fput_needed);
return error;
}
@ -566,15 +577,16 @@ SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list,
SYSCALL_DEFINE3(flistxattr, int, fd, char __user *, list, size_t, size)
{
int fput_needed;
struct file *f;
ssize_t error = -EBADF;
f = fget(fd);
f = fget_light(fd, &fput_needed);
if (!f)
return error;
audit_inode(NULL, f->f_path.dentry);
error = listxattr(f->f_path.dentry, list, size);
fput(f);
fput_light(f, fput_needed);
return error;
}
@ -634,11 +646,12 @@ SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
{
int fput_needed;
struct file *f;
struct dentry *dentry;
int error = -EBADF;
f = fget(fd);
f = fget_light(fd, &fput_needed);
if (!f)
return error;
dentry = f->f_path.dentry;
@ -648,7 +661,7 @@ SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
error = removexattr(dentry, name);
mnt_drop_write_file(f);
}
fput(f);
fput_light(f, fput_needed);
return error;
}
@ -779,3 +792,183 @@ EXPORT_SYMBOL(generic_getxattr);
EXPORT_SYMBOL(generic_listxattr);
EXPORT_SYMBOL(generic_setxattr);
EXPORT_SYMBOL(generic_removexattr);
/*
* Allocate new xattr and copy in the value; but leave the name to callers.
*/
struct simple_xattr *simple_xattr_alloc(const void *value, size_t size)
{
struct simple_xattr *new_xattr;
size_t len;
/* wrap around? */
len = sizeof(*new_xattr) + size;
if (len <= sizeof(*new_xattr))
return NULL;
new_xattr = kmalloc(len, GFP_KERNEL);
if (!new_xattr)
return NULL;
new_xattr->size = size;
memcpy(new_xattr->value, value, size);
return new_xattr;
}
/*
* xattr GET operation for in-memory/pseudo filesystems
*/
int simple_xattr_get(struct simple_xattrs *xattrs, const char *name,
void *buffer, size_t size)
{
struct simple_xattr *xattr;
int ret = -ENODATA;
spin_lock(&xattrs->lock);
list_for_each_entry(xattr, &xattrs->head, list) {
if (strcmp(name, xattr->name))
continue;
ret = xattr->size;
if (buffer) {
if (size < xattr->size)
ret = -ERANGE;
else
memcpy(buffer, xattr->value, xattr->size);
}
break;
}
spin_unlock(&xattrs->lock);
return ret;
}
static int __simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
const void *value, size_t size, int flags)
{
struct simple_xattr *xattr;
struct simple_xattr *new_xattr = NULL;
int err = 0;
/* value == NULL means remove */
if (value) {
new_xattr = simple_xattr_alloc(value, size);
if (!new_xattr)
return -ENOMEM;
new_xattr->name = kstrdup(name, GFP_KERNEL);
if (!new_xattr->name) {
kfree(new_xattr);
return -ENOMEM;
}
}
spin_lock(&xattrs->lock);
list_for_each_entry(xattr, &xattrs->head, list) {
if (!strcmp(name, xattr->name)) {
if (flags & XATTR_CREATE) {
xattr = new_xattr;
err = -EEXIST;
} else if (new_xattr) {
list_replace(&xattr->list, &new_xattr->list);
} else {
list_del(&xattr->list);
}
goto out;
}
}
if (flags & XATTR_REPLACE) {
xattr = new_xattr;
err = -ENODATA;
} else {
list_add(&new_xattr->list, &xattrs->head);
xattr = NULL;
}
out:
spin_unlock(&xattrs->lock);
if (xattr) {
kfree(xattr->name);
kfree(xattr);
}
return err;
}
/**
* simple_xattr_set - xattr SET operation for in-memory/pseudo filesystems
* @xattrs: target simple_xattr list
* @name: name of the new extended attribute
* @value: value of the new xattr. If %NULL, will remove the attribute
* @size: size of the new xattr
* @flags: %XATTR_{CREATE|REPLACE}
*
* %XATTR_CREATE is set, the xattr shouldn't exist already; otherwise fails
* with -EEXIST. If %XATTR_REPLACE is set, the xattr should exist;
* otherwise, fails with -ENODATA.
*
* Returns 0 on success, -errno on failure.
*/
int simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
const void *value, size_t size, int flags)
{
if (size == 0)
value = ""; /* empty EA, do not remove */
return __simple_xattr_set(xattrs, name, value, size, flags);
}
/*
* xattr REMOVE operation for in-memory/pseudo filesystems
*/
int simple_xattr_remove(struct simple_xattrs *xattrs, const char *name)
{
return __simple_xattr_set(xattrs, name, NULL, 0, XATTR_REPLACE);
}
static bool xattr_is_trusted(const char *name)
{
return !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN);
}
/*
* xattr LIST operation for in-memory/pseudo filesystems
*/
ssize_t simple_xattr_list(struct simple_xattrs *xattrs, char *buffer,
size_t size)
{
bool trusted = capable(CAP_SYS_ADMIN);
struct simple_xattr *xattr;
size_t used = 0;
spin_lock(&xattrs->lock);
list_for_each_entry(xattr, &xattrs->head, list) {
size_t len;
/* skip "trusted." attributes for unprivileged callers */
if (!trusted && xattr_is_trusted(xattr->name))
continue;
len = strlen(xattr->name) + 1;
used += len;
if (buffer) {
if (size < used) {
used = -ERANGE;
break;
}
memcpy(buffer, xattr->name, len);
buffer += len;
}
}
spin_unlock(&xattrs->lock);
return used;
}
/*
* Adds an extended attribute to the list
*/
void simple_xattr_list_add(struct simple_xattrs *xattrs,
struct simple_xattr *new_xattr)
{
spin_lock(&xattrs->lock);
list_add(&new_xattr->list, &xattrs->head);
spin_unlock(&xattrs->lock);
}

98
fs/xattr_acl.c
View file

@ -1,98 +0,0 @@
/*
* linux/fs/xattr_acl.c
*
* Almost all from linux/fs/ext2/acl.c:
* Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
*/
#include <linux/export.h>
#include <linux/fs.h>
#include <linux/posix_acl_xattr.h>
#include <linux/gfp.h>
/*
* Convert from extended attribute to in-memory representation.
*/
struct posix_acl *
posix_acl_from_xattr(const void *value, size_t size)
{
posix_acl_xattr_header *header = (posix_acl_xattr_header *)value;
posix_acl_xattr_entry *entry = (posix_acl_xattr_entry *)(header+1), *end;
int count;
struct posix_acl *acl;
struct posix_acl_entry *acl_e;
if (!value)
return NULL;
if (size < sizeof(posix_acl_xattr_header))
return ERR_PTR(-EINVAL);
if (header->a_version != cpu_to_le32(POSIX_ACL_XATTR_VERSION))
return ERR_PTR(-EOPNOTSUPP);
count = posix_acl_xattr_count(size);
if (count < 0)
return ERR_PTR(-EINVAL);
if (count == 0)
return NULL;
acl = posix_acl_alloc(count, GFP_NOFS);
if (!acl)
return ERR_PTR(-ENOMEM);
acl_e = acl->a_entries;
for (end = entry + count; entry != end; acl_e++, entry++) {
acl_e->e_tag = le16_to_cpu(entry->e_tag);
acl_e->e_perm = le16_to_cpu(entry->e_perm);
switch(acl_e->e_tag) {
case ACL_USER_OBJ:
case ACL_GROUP_OBJ:
case ACL_MASK:
case ACL_OTHER:
acl_e->e_id = ACL_UNDEFINED_ID;
break;
case ACL_USER:
case ACL_GROUP:
acl_e->e_id = le32_to_cpu(entry->e_id);
break;
default:
goto fail;
}
}
return acl;
fail:
posix_acl_release(acl);
return ERR_PTR(-EINVAL);
}
EXPORT_SYMBOL (posix_acl_from_xattr);
/*
* Convert from in-memory to extended attribute representation.
*/
int
posix_acl_to_xattr(const struct posix_acl *acl, void *buffer, size_t size)
{
posix_acl_xattr_header *ext_acl = (posix_acl_xattr_header *)buffer;
posix_acl_xattr_entry *ext_entry = ext_acl->a_entries;
int real_size, n;
real_size = posix_acl_xattr_size(acl->a_count);
if (!buffer)
return real_size;
if (real_size > size)
return -ERANGE;
ext_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION);
for (n=0; n < acl->a_count; n++, ext_entry++) {
ext_entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag);
ext_entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm);
ext_entry->e_id = cpu_to_le32(acl->a_entries[n].e_id);
}
return real_size;
}
EXPORT_SYMBOL (posix_acl_to_xattr);

10
fs/xfs/xfs_acl.c
View file

@ -278,12 +278,12 @@ xfs_inherit_acl(struct inode *inode, struct posix_acl *acl)
goto out;
}
error = posix_acl_create(&acl, GFP_KERNEL, &mode);
error = __posix_acl_create(&acl, GFP_KERNEL, &mode);
if (error < 0)
return error;
/*
* If posix_acl_create returns a positive value we need to
* If __posix_acl_create returns a positive value we need to
* inherit a permission that can't be represented using the Unix
* mode bits and we actually need to set an ACL.
*/
@ -315,7 +315,7 @@ xfs_acl_chmod(struct inode *inode)
if (IS_ERR(acl) || !acl)
return PTR_ERR(acl);
error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
error = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (error)
return error;
@ -337,7 +337,7 @@ xfs_xattr_acl_get(struct dentry *dentry, const char *name,
if (acl == NULL)
return -ENODATA;
error = posix_acl_to_xattr(acl, value, size);
error = posix_acl_to_xattr(&init_user_ns, acl, value, size);
posix_acl_release(acl);
return error;
@ -361,7 +361,7 @@ xfs_xattr_acl_set(struct dentry *dentry, const char *name,
if (!value)
goto set_acl;
acl = posix_acl_from_xattr(value, size);
acl = posix_acl_from_xattr(&init_user_ns, value, size);
if (!acl) {
/*
* acl_set_file(3) may request that we set default ACLs with

1
include/linux/cred.h
View file

@ -17,6 +17,7 @@
#include <linux/key.h>
#include <linux/selinux.h>
#include <linux/atomic.h>
#include <linux/uidgid.h>
struct user_struct;
struct cred;

1
include/linux/device.h
View file

@ -23,6 +23,7 @@
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/atomic.h>
#include <linux/uidgid.h>
#include <asm/device.h>
struct device;

15
include/linux/fcntl.h
View file

@ -27,6 +27,21 @@
#define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
#define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
/*
* Set/Get seals
*/
#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
/*
* Types of seals
*/
#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
#define F_SEAL_GROW 0x0004 /* prevent file from growing */
#define F_SEAL_WRITE 0x0008 /* prevent writes */
/* (1U << 31) is reserved for signed error codes */
/*
* Types of directory notifications that may be requested.
*/

32
include/linux/fs.h
View file

@ -428,6 +428,7 @@ struct fscrypt_policy {
#include <linux/atomic.h>
#include <linux/shrinker.h>
#include <linux/migrate_mode.h>
#include <linux/uidgid.h>
#include <asm/byteorder.h>
@ -683,7 +684,7 @@ struct address_space {
struct inode *host; /* owner: inode, block_device */
struct radix_tree_root page_tree; /* radix tree of all pages */
spinlock_t tree_lock; /* and lock protecting it */
unsigned int i_mmap_writable;/* count VM_SHARED mappings */
atomic_t i_mmap_writable;/* count VM_SHARED mappings */
struct prio_tree_root i_mmap; /* tree of private and shared mappings */
struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
struct mutex i_mmap_mutex; /* protect tree, count, list */
@ -765,10 +766,35 @@ static inline int mapping_mapped(struct address_space *mapping)
* Note that i_mmap_writable counts all VM_SHARED vmas: do_mmap_pgoff
* marks vma as VM_SHARED if it is shared, and the file was opened for
* writing i.e. vma may be mprotected writable even if now readonly.
*
* If i_mmap_writable is negative, no new writable mappings are allowed. You
* can only deny writable mappings, if none exists right now.
*/
static inline int mapping_writably_mapped(struct address_space *mapping)
{
return mapping->i_mmap_writable != 0;
return atomic_read(&mapping->i_mmap_writable) > 0;
}
static inline int mapping_map_writable(struct address_space *mapping)
{
return atomic_inc_unless_negative(&mapping->i_mmap_writable) ?
0 : -EPERM;
}
static inline void mapping_unmap_writable(struct address_space *mapping)
{
atomic_dec(&mapping->i_mmap_writable);
}
static inline int mapping_deny_writable(struct address_space *mapping)
{
return atomic_dec_unless_positive(&mapping->i_mmap_writable) ?
0 : -EBUSY;
}
static inline void mapping_allow_writable(struct address_space *mapping)
{
atomic_inc(&mapping->i_mmap_writable);
}
/*
@ -1708,10 +1734,10 @@ struct inode_operations {
ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
ssize_t (*listxattr) (struct dentry *, char *, size_t);
int (*removexattr) (struct dentry *, const char *);
void (*truncate_range)(struct inode *, loff_t, loff_t);
int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
u64 len);
int (*update_time)(struct inode *, struct timespec *, int);
int (*set_acl)(struct inode *, struct posix_acl *, int);
int (*atomic_open)(struct inode *, struct dentry *,
struct file *, unsigned open_flag,
umode_t create_mode, int *opened);

14
include/linux/generic_acl.h
View file

@ -1,14 +0,0 @@
#ifndef LINUX_GENERIC_ACL_H
#define LINUX_GENERIC_ACL_H
#include <linux/xattr.h>
struct inode;
extern const struct xattr_handler generic_acl_access_handler;
extern const struct xattr_handler generic_acl_default_handler;
int generic_acl_init(struct inode *, struct inode *);
int generic_acl_chmod(struct inode *);
#endif /* LINUX_GENERIC_ACL_H */

1
include/linux/ipc.h
View file

@ -79,6 +79,7 @@ struct ipc_kludge {
#ifdef __KERNEL__
#include <linux/spinlock.h>
#include <linux/uidgid.h>
#define IPCMNI 32768 /* <= MAX_INT limit for ipc arrays (including sysctl changes) */

1
include/linux/key.h
View file

@ -24,6 +24,7 @@
#include <linux/atomic.h>
#ifdef __KERNEL__
#include <linux/uidgid.h>
/* key handle serial number */
typedef int32_t key_serial_t;

4
include/linux/mm.h
View file

@ -879,8 +879,6 @@ extern void pagefault_out_of_memory(void);
extern void show_free_areas(unsigned int flags);
extern bool skip_free_areas_node(unsigned int flags, int nid);
int shmem_lock(struct file *file, int lock, struct user_struct *user);
struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags);
void shmem_set_file(struct vm_area_struct *vma, struct file *file);
int shmem_zero_setup(struct vm_area_struct *);
@ -963,11 +961,9 @@ extern void truncate_pagecache(struct inode *inode, loff_t old, loff_t new);
extern void truncate_setsize(struct inode *inode, loff_t newsize);
void pagecache_isize_extended(struct inode *inode, loff_t from, loff_t to);
extern int vmtruncate(struct inode *inode, loff_t offset);
extern int vmtruncate_range(struct inode *inode, loff_t offset, loff_t end);
void truncate_pagecache_range(struct inode *inode, loff_t offset, loff_t end);
int truncate_inode_page(struct address_space *mapping, struct page *page);
int generic_error_remove_page(struct address_space *mapping, struct page *page);
int invalidate_inode_page(struct page *page);
#ifdef CONFIG_MMU

1
include/linux/nfs4.h
View file

@ -167,6 +167,7 @@ enum nfs4_acl_whotype {
#ifdef __KERNEL__
#include <linux/list.h>
#include <linux/uidgid.h>
struct nfs4_ace {
uint32_t type;

1
include/linux/nfs_idmap.h
View file

@ -37,6 +37,7 @@
#ifndef NFS_IDMAP_H
#define NFS_IDMAP_H
#include <linux/uidgid.h>
#include <linux/types.h>
/* XXX from bits/utmp.h */

45
include/linux/posix_acl.h
View file

@ -36,7 +36,13 @@
struct posix_acl_entry {
short e_tag;
unsigned short e_perm;
union {
kuid_t e_uid;
kgid_t e_gid;
#ifndef CONFIG_UIDGID_STRICT_TYPE_CHECKS
unsigned int e_id;
#endif
};
};
struct posix_acl {
@ -82,14 +88,21 @@ extern int posix_acl_valid(const struct posix_acl *);
extern int posix_acl_permission(struct inode *, const struct posix_acl *, int);
extern struct posix_acl *posix_acl_from_mode(umode_t, gfp_t);
extern int posix_acl_equiv_mode(const struct posix_acl *, umode_t *);
extern int posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
extern int posix_acl_chmod(struct posix_acl **, gfp_t, umode_t);
extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t);
extern int posix_acl_update_mode(struct inode *, umode_t *, struct posix_acl **);
extern struct posix_acl *get_posix_acl(struct inode *, int);
extern int set_posix_acl(struct inode *, int, struct posix_acl *);
#ifdef CONFIG_FS_POSIX_ACL
extern int posix_acl_chmod(struct inode *, umode_t);
extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **,
struct posix_acl **);
extern int simple_set_acl(struct inode *, struct posix_acl *, int);
extern int simple_acl_create(struct inode *, struct inode *);
static inline struct posix_acl **acl_by_type(struct inode *inode, int type)
{
switch (type) {
@ -160,14 +173,36 @@ static inline void forget_all_cached_acls(struct inode *inode)
if (old_default != ACL_NOT_CACHED)
posix_acl_release(old_default);
}
#endif
static inline void cache_no_acl(struct inode *inode)
{
#ifdef CONFIG_FS_POSIX_ACL
inode->i_acl = NULL;
inode->i_default_acl = NULL;
#endif
}
#else
static inline int posix_acl_chmod(struct inode *inode, umode_t mode)
{
return 0;
}
#define simple_set_acl NULL
static inline int simple_acl_create(struct inode *dir, struct inode *inode)
{
return 0;
}
static inline void cache_no_acl(struct inode *inode)
{
}
static inline int posix_acl_create(struct inode *inode, umode_t *mode,
struct posix_acl **default_acl, struct posix_acl **acl)
{
*default_acl = *acl = NULL;
return 0;
}
#endif /* CONFIG_FS_POSIX_ACL */
struct posix_acl *get_acl(struct inode *inode, int type);
#endif /* __LINUX_POSIX_ACL_H */

21
include/linux/posix_acl_xattr.h
View file

@ -52,7 +52,24 @@ posix_acl_xattr_count(size_t size)
return size / sizeof(posix_acl_xattr_entry);
}
struct posix_acl *posix_acl_from_xattr(const void *value, size_t size);
int posix_acl_to_xattr(const struct posix_acl *acl, void *buffer, size_t size);
#ifdef CONFIG_FS_POSIX_ACL
void posix_acl_fix_xattr_from_user(void *value, size_t size);
void posix_acl_fix_xattr_to_user(void *value, size_t size);
#else
static inline void posix_acl_fix_xattr_from_user(void *value, size_t size)
{
}
static inline void posix_acl_fix_xattr_to_user(void *value, size_t size)
{
}
#endif
struct posix_acl *posix_acl_from_xattr(struct user_namespace *user_ns,
const void *value, size_t size);
int posix_acl_to_xattr(struct user_namespace *user_ns,
const struct posix_acl *acl, void *buffer, size_t size);
extern const struct xattr_handler posix_acl_access_xattr_handler;
extern const struct xattr_handler posix_acl_default_xattr_handler;
#endif /* _POSIX_ACL_XATTR_H */

1
include/linux/quota.h
View file

@ -35,6 +35,7 @@
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/uidgid.h>
#define __DQUOT_VERSION__ "dquot_6.5.2"

1
include/linux/radix-tree.h
View file

@ -231,6 +231,7 @@ unsigned long radix_tree_next_hole(struct radix_tree_root *root,
unsigned long radix_tree_prev_hole(struct radix_tree_root *root,
unsigned long index, unsigned long max_scan);
int radix_tree_preload(gfp_t gfp_mask);
int radix_tree_maybe_preload(gfp_t gfp_mask);
void radix_tree_init(void);
void *radix_tree_tag_set(struct radix_tree_root *root,
unsigned long index, unsigned int tag);

10
include/linux/sched.h
View file

@ -90,6 +90,7 @@ struct sched_param {
#include <linux/latencytop.h>
#include <linux/cred.h>
#include <linux/llist.h>
#include <linux/uidgid.h>
#include <asm/processor.h>
@ -2721,6 +2722,15 @@ extern int __cond_resched_softirq(void);
__cond_resched_softirq(); \
})
static inline void cond_resched_rcu(void)
{
#if defined(CONFIG_DEBUG_ATOMIC_SLEEP) || !defined(CONFIG_PREEMPT_RCU)
rcu_read_unlock();
cond_resched();
rcu_read_lock();
#endif
}
/*
* Does a critical section need to be broken due to another
* task waiting?: (technically does not depend on CONFIG_PREEMPT,

22
include/linux/shmem_fs.h
View file

@ -1,15 +1,18 @@
#ifndef __SHMEM_FS_H
#define __SHMEM_FS_H
#include <linux/file.h>
#include <linux/swap.h>
#include <linux/mempolicy.h>
#include <linux/pagemap.h>
#include <linux/percpu_counter.h>
#include <linux/xattr.h>
/* inode in-kernel data */
struct shmem_inode_info {
spinlock_t lock;
unsigned int seals; /* shmem seals */
unsigned long flags;
unsigned long alloced; /* data pages alloced to file */
union {
@ -18,7 +21,7 @@ struct shmem_inode_info {
};
struct shared_policy policy; /* NUMA memory alloc policy */
struct list_head swaplist; /* chain of maybes on swap */
struct list_head xattr_list; /* list of shmem_xattr */
struct simple_xattrs xattrs; /* list of xattrs */
struct inode vfs_inode;
};
@ -46,6 +49,8 @@ extern int shmem_init(void);
extern int shmem_fill_super(struct super_block *sb, void *data, int silent);
extern struct file *shmem_file_setup(const char *name,
loff_t size, unsigned long flags);
extern struct file *shmem_kernel_file_setup(const char *name, loff_t size,
unsigned long flags);
extern int shmem_zero_setup(struct vm_area_struct *);
extern int shmem_lock(struct file *file, int lock, struct user_struct *user);
extern void shmem_unlock_mapping(struct address_space *mapping);
@ -61,4 +66,19 @@ static inline struct page *shmem_read_mapping_page(
mapping_gfp_mask(mapping));
}
#ifdef CONFIG_TMPFS
extern int shmem_add_seals(struct file *file, unsigned int seals);
extern int shmem_get_seals(struct file *file);
extern long shmem_fcntl(struct file *file, unsigned int cmd, unsigned long arg);
#else
static inline long shmem_fcntl(struct file *f, unsigned int c, unsigned long a)
{
return -EINVAL;
}
#endif
#endif

1
include/linux/stat.h
View file

@ -58,6 +58,7 @@
#include <linux/types.h>
#include <linux/time.h>
#include <linux/uidgid.h>
struct kstat {
u64 ino;

1
include/linux/sunrpc/auth.h
View file

@ -17,6 +17,7 @@
#include <linux/atomic.h>
#include <linux/rcupdate.h>
#include <linux/uidgid.h>
/* size of the nodename buffer */
#define UNX_MAXNODENAME 32

48
include/linux/xattr.h
View file

@ -59,7 +59,9 @@
#ifdef __KERNEL__
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/spinlock.h>
struct inode;
struct dentry;
@ -96,6 +98,52 @@ ssize_t vfs_getxattr_alloc(struct dentry *dentry, const char *name,
char **xattr_value, size_t size, gfp_t flags);
int vfs_xattr_cmp(struct dentry *dentry, const char *xattr_name,
const char *value, size_t size, gfp_t flags);
struct simple_xattrs {
struct list_head head;
spinlock_t lock;
};
struct simple_xattr {
struct list_head list;
char *name;
size_t size;
char value[0];
};
/*
* initialize the simple_xattrs structure
*/
static inline void simple_xattrs_init(struct simple_xattrs *xattrs)
{
INIT_LIST_HEAD(&xattrs->head);
spin_lock_init(&xattrs->lock);
}
/*
* free all the xattrs
*/
static inline void simple_xattrs_free(struct simple_xattrs *xattrs)
{
struct simple_xattr *xattr, *node;
list_for_each_entry_safe(xattr, node, &xattrs->head, list) {
kfree(xattr->name);
kfree(xattr);
}
}
struct simple_xattr *simple_xattr_alloc(const void *value, size_t size);
int simple_xattr_get(struct simple_xattrs *xattrs, const char *name,
void *buffer, size_t size);
int simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
const void *value, size_t size, int flags);
int simple_xattr_remove(struct simple_xattrs *xattrs, const char *name);
ssize_t simple_xattr_list(struct simple_xattrs *xattrs, char *buffer,
size_t size);
void simple_xattr_list_add(struct simple_xattrs *xattrs,
struct simple_xattr *new_xattr);
#endif /* __KERNEL__ */
#endif /* _LINUX_XATTR_H */

1
include/net/netns/ipv4.h
View file

@ -5,6 +5,7 @@
#ifndef __NETNS_IPV4_H__
#define __NETNS_IPV4_H__
#include <linux/uidgid.h>
#include <net/inet_frag.h>
struct ctl_table_header;

2
kernel/fork.c
View file

@ -416,7 +416,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
atomic_dec(&inode->i_writecount);
mutex_lock(&mapping->i_mmap_mutex);
if (tmp->vm_flags & VM_SHARED)
mapping->i_mmap_writable++;
atomic_inc(&mapping->i_mmap_writable);
flush_dcache_mmap_lock(mapping);
/* insert tmp into the share list, just after mpnt */
vma_prio_tree_add(tmp, mpnt);

41
lib/radix-tree.c
View file

@ -32,6 +32,7 @@
#include <linux/string.h>
#include <linux/bitops.h>
#include <linux/rcupdate.h>
#include <linux/hardirq.h> /* in_interrupt() */
#ifdef __KERNEL__
@ -194,7 +195,12 @@ radix_tree_node_alloc(struct radix_tree_root *root)
struct radix_tree_node *ret = NULL;
gfp_t gfp_mask = root_gfp_mask(root);
if (!(gfp_mask & __GFP_WAIT)) {
/*
* Preload code isn't irq safe and it doesn't make sence to use
* preloading in the interrupt anyway as all the allocations have to
* be atomic. So just do normal allocation when in interrupt.
*/
if (!(gfp_mask & __GFP_WAIT) && !in_interrupt()) {
struct radix_tree_preload *rtp;
/*
@ -251,7 +257,7 @@ radix_tree_node_free(struct radix_tree_node *node)
* To make use of this facility, the radix tree must be initialised without
* __GFP_WAIT being passed to INIT_RADIX_TREE().
*/
int radix_tree_preload(gfp_t gfp_mask)
static int __radix_tree_preload(gfp_t gfp_mask)
{
struct radix_tree_preload *rtp;
struct radix_tree_node *node;
@ -275,8 +281,39 @@ int radix_tree_preload(gfp_t gfp_mask)
out:
return ret;
}
/*
* Load up this CPU's radix_tree_node buffer with sufficient objects to
* ensure that the addition of a single element in the tree cannot fail. On
* success, return zero, with preemption disabled. On error, return -ENOMEM
* with preemption not disabled.
*
* To make use of this facility, the radix tree must be initialised without
* __GFP_WAIT being passed to INIT_RADIX_TREE().
*/
int radix_tree_preload(gfp_t gfp_mask)
{
/* Warn on non-sensical use... */
WARN_ON_ONCE(!(gfp_mask & __GFP_WAIT));
return __radix_tree_preload(gfp_mask);
}
EXPORT_SYMBOL(radix_tree_preload);
/*
* The same as above function, except we don't guarantee preloading happens.
* We do it, if we decide it helps. On success, return zero with preemption
* disabled. On error, return -ENOMEM with preemption not disabled.
*/
int radix_tree_maybe_preload(gfp_t gfp_mask)
{
if (gfp_mask & __GFP_WAIT)
return __radix_tree_preload(gfp_mask);
/* Preloading doesn't help anything with this gfp mask, skip it */
preempt_disable();
return 0;
}
EXPORT_SYMBOL(radix_tree_maybe_preload);
/*
* Return the maximum key which can be store into a
* radix tree with height HEIGHT.

2
mm/filemap.c
View file

@ -453,7 +453,7 @@ int add_to_page_cache_locked(struct page *page, struct address_space *mapping,
if (error)
goto out;
error = radix_tree_preload(gfp_mask & ~__GFP_HIGHMEM);
error = radix_tree_maybe_preload(gfp_mask & ~__GFP_HIGHMEM);
if (error == 0) {
page_cache_get(page);
page->mapping = mapping;

15
mm/madvise.c
View file

@ -11,8 +11,10 @@
#include <linux/mempolicy.h>
#include <linux/page-isolation.h>
#include <linux/hugetlb.h>
#include <linux/falloc.h>
#include <linux/sched.h>
#include <linux/ksm.h>
#include <linux/fs.h>
#include <linux/file.h>
/*
@ -202,8 +204,7 @@ static long madvise_remove(struct vm_area_struct *vma,
struct vm_area_struct **prev,
unsigned long start, unsigned long end)
{
struct address_space *mapping;
loff_t offset, endoff;
loff_t offset;
int error;
struct file *f;
@ -221,22 +222,20 @@ static long madvise_remove(struct vm_area_struct *vma,
if ((vma->vm_flags & (VM_SHARED|VM_WRITE)) != (VM_SHARED|VM_WRITE))
return -EACCES;
mapping = vma->vm_file->f_mapping;
offset = (loff_t)(start - vma->vm_start)
+ ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
endoff = (loff_t)(end - vma->vm_start - 1)
+ ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
/*
* vmtruncate_range may need to take i_mutex. We need to
* Filesystem's fallocate may need to take i_mutex. We need to
* explicitly grab a reference because the vma (and hence the
* vma's reference to the file) can go away as soon as we drop
* mmap_sem.
*/
get_file(f);
up_read(&current->mm->mmap_sem);
error = vmtruncate_range(mapping->host, offset, endoff);
error = do_fallocate(f,
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
offset, end - start);
fput(f);
down_read(&current->mm->mmap_sem);
return error;

11
mm/memcontrol.c
View file

@ -3372,7 +3372,7 @@ void mem_cgroup_end_migration(struct mem_cgroup *memcg,
void mem_cgroup_replace_page_cache(struct page *oldpage,
struct page *newpage)
{
struct mem_cgroup *memcg;
struct mem_cgroup *memcg = NULL;
struct page_cgroup *pc;
enum charge_type type = MEM_CGROUP_CHARGE_TYPE_CACHE;
@ -3382,11 +3382,20 @@ void mem_cgroup_replace_page_cache(struct page *oldpage,
pc = lookup_page_cgroup(oldpage);
/* fix accounting on old pages */
lock_page_cgroup(pc);
if (PageCgroupUsed(pc)) {
memcg = pc->mem_cgroup;
mem_cgroup_charge_statistics(memcg, false, -1);
ClearPageCgroupUsed(pc);
}
unlock_page_cgroup(pc);
/*
* When called from shmem_replace_page(), in some cases the
* oldpage has already been charged, and in some cases not.
*/
if (!memcg)
return;
if (PageSwapBacked(oldpage))
type = MEM_CGROUP_CHARGE_TYPE_SHMEM;

36
mm/mmap.c
View file

@ -207,7 +207,7 @@ static void __remove_shared_vm_struct(struct vm_area_struct *vma,
if (vma->vm_flags & VM_DENYWRITE)
atomic_inc(&file->f_path.dentry->d_inode->i_writecount);
if (vma->vm_flags & VM_SHARED)
mapping->i_mmap_writable--;
mapping_unmap_writable(mapping);
flush_dcache_mmap_lock(mapping);
if (unlikely(vma->vm_flags & VM_NONLINEAR))
@ -453,7 +453,7 @@ static void __vma_link_file(struct vm_area_struct *vma)
if (vma->vm_flags & VM_DENYWRITE)
atomic_dec(&file->f_path.dentry->d_inode->i_writecount);
if (vma->vm_flags & VM_SHARED)
mapping->i_mmap_writable++;
atomic_inc(&mapping->i_mmap_writable);
flush_dcache_mmap_lock(mapping);
if (unlikely(vma->vm_flags & VM_NONLINEAR))
@ -1290,11 +1290,9 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma, *prev;
int correct_wcount = 0;
int error;
struct rb_node **rb_link, *rb_parent;
unsigned long charged = 0;
struct inode *inode = file ? file->f_path.dentry->d_inode : NULL;
/* Check against address space limit. */
if (!may_expand_vm(mm, len >> PAGE_SHIFT)) {
@ -1383,8 +1381,18 @@ munmap_back:
error = deny_write_access(file);
if (error)
goto free_vma;
correct_wcount = 1;
}
if (vm_flags & VM_SHARED) {
error = mapping_map_writable(file->f_mapping);
if (error)
goto allow_write_and_free_vma;
}
/* ->mmap() can change vma->vm_file, but must guarantee that
* vma_link() below can deny write-access if VM_DENYWRITE is set
* and map writably if VM_SHARED is set. This usually means the
* new file must not have been exposed to user-space, yet.
*/
vma->vm_file = file;
get_file(file);
error = file->f_op->mmap(file, vma);
@ -1425,11 +1433,14 @@ munmap_back:
}
vma_link(mm, vma, prev, rb_link, rb_parent);
file = vma->vm_file;
/* Once vma denies write, undo our temporary denial count */
if (correct_wcount)
atomic_inc(&inode->i_writecount);
if (file) {
if (vm_flags & VM_SHARED)
mapping_unmap_writable(file->f_mapping);
if (vm_flags & VM_DENYWRITE)
allow_write_access(file);
}
file = vma->vm_file;
out:
perf_event_mmap(vma);
@ -1443,14 +1454,17 @@ out:
return addr;
unmap_and_free_vma:
if (correct_wcount)
atomic_inc(&inode->i_writecount);
vma->vm_file = NULL;
fput(file);
/* Undo any partial mapping done by a device driver. */
unmap_region(mm, vma, prev, vma->vm_start, vma->vm_end);
charged = 0;
if (vm_flags & VM_SHARED)
mapping_unmap_writable(file->f_mapping);
allow_write_and_free_vma:
if (vm_flags & VM_DENYWRITE)
allow_write_access(file);
free_vma:
kmem_cache_free(vm_area_cachep, vma);
unacct_error:

1182
mm/shmem.c
View file

File diff suppressed because it is too large Load diff

5
mm/swap_state.c
View file

@ -38,6 +38,7 @@ static struct backing_dev_info swap_backing_dev_info = {
struct address_space swapper_spaces[MAX_SWAPFILES] = {
[0 ... MAX_SWAPFILES - 1] = {
.page_tree = RADIX_TREE_INIT(GFP_ATOMIC|__GFP_NOWARN),
.i_mmap_writable = ATOMIC_INIT(0),
.a_ops = &swap_aops,
.backing_dev_info = &swap_backing_dev_info,
}
@ -120,7 +121,7 @@ int add_to_swap_cache(struct page *page, swp_entry_t entry, gfp_t gfp_mask)
{
int error;
error = radix_tree_preload(gfp_mask);
error = radix_tree_maybe_preload(gfp_mask);
if (!error) {
error = __add_to_swap_cache(page, entry);
radix_tree_preload_end();
@ -326,7 +327,7 @@ struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
/*
* call radix_tree_preload() while we can wait.
*/
err = radix_tree_preload(gfp_mask & GFP_KERNEL);
err = radix_tree_maybe_preload(gfp_mask & GFP_KERNEL);
if (err)
break;