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userns: Convert ntfs to use kuid and kgid where appropriate

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Cc: Anton Altaparmakov <anton@tuxera.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2012-02-07 16:29:36 -08:00
parent 305d3d0dbc
commit b29f7751c9
4 changed files with 39 additions and 13 deletions
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7
fs/ntfs/inode.c
View File

@ -2124,7 +2124,8 @@ int ntfs_read_inode_mount(struct inode *vi)
* ntfs_read_inode() will have set up the default ones.
*/
/* Set uid and gid to root. */
vi->i_uid = vi->i_gid = 0;
vi->i_uid = GLOBAL_ROOT_UID;
vi->i_gid = GLOBAL_ROOT_GID;
/* Regular file. No access for anyone. */
vi->i_mode = S_IFREG;
/* No VFS initiated operations allowed for $MFT. */
@ -2312,8 +2313,8 @@ int ntfs_show_options(struct seq_file *sf, struct dentry *root)
ntfs_volume *vol = NTFS_SB(root->d_sb);
int i;
seq_printf(sf, ",uid=%i", vol->uid);
seq_printf(sf, ",gid=%i", vol->gid);
seq_printf(sf, ",uid=%i", from_kuid_munged(&init_user_ns, vol->uid));
seq_printf(sf, ",gid=%i", from_kgid_munged(&init_user_ns, vol->gid));
if (vol->fmask == vol->dmask)
seq_printf(sf, ",umask=0%o", vol->fmask);
else {

39
fs/ntfs/super.c
View File

@ -102,8 +102,8 @@ static bool parse_options(ntfs_volume *vol, char *opt)
char *p, *v, *ov;
static char *utf8 = "utf8";
int errors = 0, sloppy = 0;
uid_t uid = (uid_t)-1;
gid_t gid = (gid_t)-1;
kuid_t uid = INVALID_UID;
kgid_t gid = INVALID_GID;
umode_t fmask = (umode_t)-1, dmask = (umode_t)-1;
int mft_zone_multiplier = -1, on_errors = -1;
int show_sys_files = -1, case_sensitive = -1, disable_sparse = -1;
@ -128,6 +128,30 @@ static bool parse_options(ntfs_volume *vol, char *opt)
if (*v) \
goto needs_val; \
}
#define NTFS_GETOPT_UID(option, variable) \
if (!strcmp(p, option)) { \
uid_t uid_value; \
if (!v || !*v) \
goto needs_arg; \
uid_value = simple_strtoul(ov = v, &v, 0); \
if (*v) \
goto needs_val; \
variable = make_kuid(current_user_ns(), uid_value); \
if (!uid_valid(variable)) \
goto needs_val; \
}
#define NTFS_GETOPT_GID(option, variable) \
if (!strcmp(p, option)) { \
gid_t gid_value; \
if (!v || !*v) \
goto needs_arg; \
gid_value = simple_strtoul(ov = v, &v, 0); \
if (*v) \
goto needs_val; \
variable = make_kgid(current_user_ns(), gid_value); \
if (!gid_valid(variable)) \
goto needs_val; \
}
#define NTFS_GETOPT_OCTAL(option, variable) \
if (!strcmp(p, option)) { \
if (!v || !*v) \
@ -165,8 +189,8 @@ static bool parse_options(ntfs_volume *vol, char *opt)
while ((p = strsep(&opt, ","))) {
if ((v = strchr(p, '=')))
*v++ = 0;
NTFS_GETOPT("uid", uid)
else NTFS_GETOPT("gid", gid)
NTFS_GETOPT_UID("uid", uid)
else NTFS_GETOPT_GID("gid", gid)
else NTFS_GETOPT_OCTAL("umask", fmask = dmask)
else NTFS_GETOPT_OCTAL("fmask", fmask)
else NTFS_GETOPT_OCTAL("dmask", dmask)
@ -283,9 +307,9 @@ no_mount_options:
vol->on_errors = on_errors;
if (!vol->on_errors || vol->on_errors == ON_ERRORS_RECOVER)
vol->on_errors |= ON_ERRORS_CONTINUE;
if (uid != (uid_t)-1)
if (uid_valid(uid))
vol->uid = uid;
if (gid != (gid_t)-1)
if (gid_valid(gid))
vol->gid = gid;
if (fmask != (umode_t)-1)
vol->fmask = fmask;
@ -1023,7 +1047,8 @@ static bool load_and_init_mft_mirror(ntfs_volume *vol)
* ntfs_read_inode() will have set up the default ones.
*/
/* Set uid and gid to root. */
tmp_ino->i_uid = tmp_ino->i_gid = 0;
tmp_ino->i_uid = GLOBAL_ROOT_UID;
tmp_ino->i_gid = GLOBAL_ROOT_GID;
/* Regular file. No access for anyone. */
tmp_ino->i_mode = S_IFREG;
/* No VFS initiated operations allowed for $MFTMirr. */

5
fs/ntfs/volume.h
View File

@ -25,6 +25,7 @@
#define _LINUX_NTFS_VOLUME_H
#include <linux/rwsem.h>
#include <linux/uidgid.h>
#include "types.h"
#include "layout.h"
@ -46,8 +47,8 @@ typedef struct {
sized blocks on the device. */
/* Configuration provided by user at mount time. */
unsigned long flags; /* Miscellaneous flags, see below. */
uid_t uid; /* uid that files will be mounted as. */
gid_t gid; /* gid that files will be mounted as. */
kuid_t uid; /* uid that files will be mounted as. */
kgid_t gid; /* gid that files will be mounted as. */
umode_t fmask; /* The mask for file permissions. */
umode_t dmask; /* The mask for directory
permissions. */

1
init/Kconfig
View File

@ -949,7 +949,6 @@ config UIDGID_CONVERTED
depends on NCP_FS = n
depends on NFSD = n
depends on NFS_FS = n
depends on NTFS_FS = n
depends on OCFS2_FS = n
depends on OMFS_FS = n
depends on QNX4FS_FS = n