c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2024-12-24 18:39:34 +03:00
Code Issues Packages Projects Releases Wiki Activity

Restructure mount option handling

Browse Source 
Restructure the handling of mount options to be consistent with
upstream OpenZFS.  This required making the following changes.

- The zfs_mntopts_t was renamed vfs_t and adjusted to provide
  the minimal needed functionality.  This includes a pointer
  back to the associated zfsvfs_t.  Plus it made it possible
  to revert zfs_register_callbacks() and zfsvfs_create() back
  to their original prototypes.

- A zfs_mnt_t structure was added for the sole purpose of
  providing a structure to pass the osname and raw mount
  pointer to zfs_domount() without having to copy them.

- Mount option parsing was moved down from the zpl_* wrapper
  functions in to the zfs_* functions.  This allowed for the
  code to be simplied and it's where similar functionality
  appears on other platforms.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf 2017-03-08 19:56:09 -05:00
parent f298b24ddf
commit 1c2555ef92
5 changed files with 296 additions and 313 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
include/sys/zfs_vfsops.h
View File

@ -41,33 +41,43 @@ extern "C" {
typedef struct zfsvfs zfsvfs_t;
struct znode;
typedef struct zfs_mntopts {
char *z_osname; /* Objset name */
char *z_mntpoint; /* Primary mount point */
uint64_t z_xattr;
boolean_t z_readonly;
boolean_t z_do_readonly;
boolean_t z_setuid;
boolean_t z_do_setuid;
boolean_t z_exec;
boolean_t z_do_exec;
boolean_t z_devices;
boolean_t z_do_devices;
boolean_t z_do_xattr;
boolean_t z_atime;
boolean_t z_do_atime;
boolean_t z_relatime;
boolean_t z_do_relatime;
boolean_t z_nbmand;
boolean_t z_do_nbmand;
} zfs_mntopts_t;
/*
* This structure emulates the vfs_t from other platforms. It's purpose
* is to faciliate the handling of mount options and minimize structural
* differences between the platforms.
*/
typedef struct vfs {
struct zfsvfs *vfs_data;
char *vfs_mntpoint; /* Primary mount point */
uint64_t vfs_xattr;
boolean_t vfs_readonly;
boolean_t vfs_do_readonly;
boolean_t vfs_setuid;
boolean_t vfs_do_setuid;
boolean_t vfs_exec;
boolean_t vfs_do_exec;
boolean_t vfs_devices;
boolean_t vfs_do_devices;
boolean_t vfs_do_xattr;
boolean_t vfs_atime;
boolean_t vfs_do_atime;
boolean_t vfs_relatime;
boolean_t vfs_do_relatime;
boolean_t vfs_nbmand;
boolean_t vfs_do_nbmand;
} vfs_t;
typedef struct zfs_mnt {
const char *mnt_osname; /* Objset name */
char *mnt_data; /* Raw mount options */
} zfs_mnt_t;
struct zfsvfs {
vfs_t *z_vfs; /* generic fs struct */
struct super_block *z_sb; /* generic super_block */
struct backing_dev_info z_bdi; /* generic backing dev info */
struct zfsvfs *z_parent; /* parent fs */
objset_t *z_os; /* objset reference */
zfs_mntopts_t *z_mntopts; /* passed mount options */
uint64_t z_flags; /* super_block flags */
uint64_t z_root; /* id of root znode */
uint64_t z_unlinkedobj; /* id of unlinked zapobj */
@ -193,17 +203,15 @@ extern boolean_t zfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup,
extern boolean_t zfs_fuid_overobjquota(zfsvfs_t *zfsvfs, boolean_t isgroup,
uint64_t fuid);
extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers);
extern int zfsvfs_create(const char *name, zfs_mntopts_t *zmo, zfsvfs_t **zfvp);
extern int zfsvfs_create(const char *name, zfsvfs_t **zfvp);
extern void zfsvfs_free(zfsvfs_t *zfsvfs);
extern int zfs_check_global_label(const char *dsname, const char *hexsl);
extern boolean_t zfs_is_readonly(zfsvfs_t *zfsvfs);
extern zfs_mntopts_t *zfs_mntopts_alloc(void);
extern void zfs_mntopts_free(zfs_mntopts_t *zmo);
extern int zfs_domount(struct super_block *sb, zfs_mntopts_t *zmo, int silent);
extern int zfs_domount(struct super_block *sb, zfs_mnt_t *zm, int silent);
extern void zfs_preumount(struct super_block *sb);
extern int zfs_umount(struct super_block *sb);
extern int zfs_remount(struct super_block *sb, int *flags, zfs_mntopts_t *zmo);
extern int zfs_remount(struct super_block *sb, int *flags, zfs_mnt_t *zm);
extern int zfs_statvfs(struct dentry *dentry, struct kstatfs *statp);
extern int zfs_vget(struct super_block *sb, struct inode **ipp, fid_t *fidp);
extern int zfs_prune(struct super_block *sb, unsigned long nr_to_scan,

4
module/zfs/zfs_ctldir.c
View File

@ -746,7 +746,7 @@ zfsctl_snapshot_path_objset(zfsvfs_t *zfsvfs, uint64_t objsetid,
uint64_t id, pos = 0;
int error = 0;
if (zfsvfs->z_mntopts->z_mntpoint == NULL)
if (zfsvfs->z_vfs->vfs_mntpoint == NULL)
return (ENOENT);
cookie = spl_fstrans_mark();
@ -767,7 +767,7 @@ zfsctl_snapshot_path_objset(zfsvfs_t *zfsvfs, uint64_t objsetid,
memset(full_path, 0, path_len);
snprintf(full_path, path_len - 1, "%s/.zfs/snapshot/%s",
zfsvfs->z_mntopts->z_mntpoint, snapname);
zfsvfs->z_vfs->vfs_mntpoint, snapname);
out:
kmem_free(snapname, ZFS_MAX_DATASET_NAME_LEN);
spl_fstrans_unmark(cookie);

2
module/zfs/zfs_ioctl.c
View File

@ -1431,7 +1431,7 @@ zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
int error = 0;
if (getzfsvfs(name, zfvp) != 0)
error = zfsvfs_create(name, NULL, zfvp);
error = zfsvfs_create(name, zfvp);
if (error == 0) {
rrm_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
RW_READER, tag);

317
module/zfs/zfs_vfsops.c
View File

@ -68,6 +68,200 @@
#include <sys/zpl.h>
#include "zfs_comutil.h"
enum {
TOKEN_RO,
TOKEN_RW,
TOKEN_SETUID,
TOKEN_NOSETUID,
TOKEN_EXEC,
TOKEN_NOEXEC,
TOKEN_DEVICES,
TOKEN_NODEVICES,
TOKEN_DIRXATTR,
TOKEN_SAXATTR,
TOKEN_XATTR,
TOKEN_NOXATTR,
TOKEN_ATIME,
TOKEN_NOATIME,
TOKEN_RELATIME,
TOKEN_NORELATIME,
TOKEN_NBMAND,
TOKEN_NONBMAND,
TOKEN_MNTPOINT,
TOKEN_LAST,
};
static const match_table_t zpl_tokens = {
{ TOKEN_RO, MNTOPT_RO },
{ TOKEN_RW, MNTOPT_RW },
{ TOKEN_SETUID, MNTOPT_SETUID },
{ TOKEN_NOSETUID, MNTOPT_NOSETUID },
{ TOKEN_EXEC, MNTOPT_EXEC },
{ TOKEN_NOEXEC, MNTOPT_NOEXEC },
{ TOKEN_DEVICES, MNTOPT_DEVICES },
{ TOKEN_NODEVICES, MNTOPT_NODEVICES },
{ TOKEN_DIRXATTR, MNTOPT_DIRXATTR },
{ TOKEN_SAXATTR, MNTOPT_SAXATTR },
{ TOKEN_XATTR, MNTOPT_XATTR },
{ TOKEN_NOXATTR, MNTOPT_NOXATTR },
{ TOKEN_ATIME, MNTOPT_ATIME },
{ TOKEN_NOATIME, MNTOPT_NOATIME },
{ TOKEN_RELATIME, MNTOPT_RELATIME },
{ TOKEN_NORELATIME, MNTOPT_NORELATIME },
{ TOKEN_NBMAND, MNTOPT_NBMAND },
{ TOKEN_NONBMAND, MNTOPT_NONBMAND },
{ TOKEN_MNTPOINT, MNTOPT_MNTPOINT "=%s" },
{ TOKEN_LAST, NULL },
};
static void
zfsvfs_vfs_free(vfs_t *vfsp)
{
if (vfsp != NULL) {
if (vfsp->vfs_mntpoint != NULL)
strfree(vfsp->vfs_mntpoint);
kmem_free(vfsp, sizeof (vfs_t));
}
}
static int
zfsvfs_parse_option(char *option, int token, substring_t *args, vfs_t *vfsp)
{
switch (token) {
case TOKEN_RO:
vfsp->vfs_readonly = B_TRUE;
vfsp->vfs_do_readonly = B_TRUE;
break;
case TOKEN_RW:
vfsp->vfs_readonly = B_FALSE;
vfsp->vfs_do_readonly = B_TRUE;
break;
case TOKEN_SETUID:
vfsp->vfs_setuid = B_TRUE;
vfsp->vfs_do_setuid = B_TRUE;
break;
case TOKEN_NOSETUID:
vfsp->vfs_setuid = B_FALSE;
vfsp->vfs_do_setuid = B_TRUE;
break;
case TOKEN_EXEC:
vfsp->vfs_exec = B_TRUE;
vfsp->vfs_do_exec = B_TRUE;
break;
case TOKEN_NOEXEC:
vfsp->vfs_exec = B_FALSE;
vfsp->vfs_do_exec = B_TRUE;
break;
case TOKEN_DEVICES:
vfsp->vfs_devices = B_TRUE;
vfsp->vfs_do_devices = B_TRUE;
break;
case TOKEN_NODEVICES:
vfsp->vfs_devices = B_FALSE;
vfsp->vfs_do_devices = B_TRUE;
break;
case TOKEN_DIRXATTR:
vfsp->vfs_xattr = ZFS_XATTR_DIR;
vfsp->vfs_do_xattr = B_TRUE;
break;
case TOKEN_SAXATTR:
vfsp->vfs_xattr = ZFS_XATTR_SA;
vfsp->vfs_do_xattr = B_TRUE;
break;
case TOKEN_XATTR:
vfsp->vfs_xattr = ZFS_XATTR_DIR;
vfsp->vfs_do_xattr = B_TRUE;
break;
case TOKEN_NOXATTR:
vfsp->vfs_xattr = ZFS_XATTR_OFF;
vfsp->vfs_do_xattr = B_TRUE;
break;
case TOKEN_ATIME:
vfsp->vfs_atime = B_TRUE;
vfsp->vfs_do_atime = B_TRUE;
break;
case TOKEN_NOATIME:
vfsp->vfs_atime = B_FALSE;
vfsp->vfs_do_atime = B_TRUE;
break;
case TOKEN_RELATIME:
vfsp->vfs_relatime = B_TRUE;
vfsp->vfs_do_relatime = B_TRUE;
break;
case TOKEN_NORELATIME:
vfsp->vfs_relatime = B_FALSE;
vfsp->vfs_do_relatime = B_TRUE;
break;
case TOKEN_NBMAND:
vfsp->vfs_nbmand = B_TRUE;
vfsp->vfs_do_nbmand = B_TRUE;
break;
case TOKEN_NONBMAND:
vfsp->vfs_nbmand = B_FALSE;
vfsp->vfs_do_nbmand = B_TRUE;
break;
case TOKEN_MNTPOINT:
vfsp->vfs_mntpoint = match_strdup(&args[0]);
if (vfsp->vfs_mntpoint == NULL)
return (SET_ERROR(ENOMEM));
break;
default:
break;
}
return (0);
}
/*
* Parse the raw mntopts and return a vfs_t describing the options.
*/
static int
zfsvfs_parse_options(char *mntopts, vfs_t **vfsp)
{
vfs_t *tmp_vfsp;
int error;
tmp_vfsp = kmem_zalloc(sizeof (vfs_t), KM_SLEEP);
if (mntopts != NULL) {
substring_t args[MAX_OPT_ARGS];
char *tmp_mntopts, *p, *t;
int token;
tmp_mntopts = t = strdup(mntopts);
if (tmp_mntopts == NULL)
return (SET_ERROR(ENOMEM));
while ((p = strsep(&t, ",")) != NULL) {
if (!*p)
continue;
args[0].to = args[0].from = NULL;
token = match_token(p, zpl_tokens, args);
error = zfsvfs_parse_option(p, token, args, tmp_vfsp);
if (error) {
strfree(tmp_mntopts);
zfsvfs_vfs_free(tmp_vfsp);
return (error);
}
}
strfree(tmp_mntopts);
}
*vfsp = tmp_vfsp;
return (0);
}
boolean_t
zfs_is_readonly(zfsvfs_t *zfsvfs)
{
return (!!(zfsvfs->z_sb->s_flags & MS_RDONLY));
}
/*ARGSUSED*/
int
zfs_sync(struct super_block *sb, int wait, cred_t *cr)
@ -122,12 +316,6 @@ zfs_sync(struct super_block *sb, int wait, cred_t *cr)
return (0);
}
boolean_t
zfs_is_readonly(zfsvfs_t *zfsvfs)
{
return (!!(zfsvfs->z_sb->s_flags & MS_RDONLY));
}
static void
atime_changed_cb(void *arg, uint64_t newval)
{
@ -255,16 +443,18 @@ acl_inherit_changed_cb(void *arg, uint64_t newval)
((zfsvfs_t *)arg)->z_acl_inherit = newval;
}
int
zfs_register_callbacks(zfsvfs_t *zfsvfs)
static int
zfs_register_callbacks(vfs_t *vfsp)
{
struct dsl_dataset *ds = NULL;
objset_t *os = zfsvfs->z_os;
zfs_mntopts_t *zmo = zfsvfs->z_mntopts;
objset_t *os = NULL;
zfsvfs_t *zfsvfs = NULL;
int error = 0;
ASSERT(vfsp);
zfsvfs = vfsp->vfs_data;
ASSERT(zfsvfs);
ASSERT(zmo);
os = zfsvfs->z_os;
/*
* The act of registering our callbacks will destroy any mount
@ -273,8 +463,8 @@ zfs_register_callbacks(zfsvfs_t *zfsvfs)
* restore them after we register the callbacks.
*/
if (zfs_is_readonly(zfsvfs) || !spa_writeable(dmu_objset_spa(os))) {
zmo->z_do_readonly = B_TRUE;
zmo->z_readonly = B_TRUE;
vfsp->vfs_do_readonly = B_TRUE;
vfsp->vfs_readonly = B_TRUE;
}
/*
@ -320,22 +510,22 @@ zfs_register_callbacks(zfsvfs_t *zfsvfs)
/*
* Invoke our callbacks to restore temporary mount options.
*/
if (zmo->z_do_readonly)
readonly_changed_cb(zfsvfs, zmo->z_readonly);
if (zmo->z_do_setuid)
setuid_changed_cb(zfsvfs, zmo->z_setuid);
if (zmo->z_do_exec)
exec_changed_cb(zfsvfs, zmo->z_exec);
if (zmo->z_do_devices)
devices_changed_cb(zfsvfs, zmo->z_devices);
if (zmo->z_do_xattr)
xattr_changed_cb(zfsvfs, zmo->z_xattr);
if (zmo->z_do_atime)
atime_changed_cb(zfsvfs, zmo->z_atime);
if (zmo->z_do_relatime)
relatime_changed_cb(zfsvfs, zmo->z_relatime);
if (zmo->z_do_nbmand)
nbmand_changed_cb(zfsvfs, zmo->z_nbmand);
if (vfsp->vfs_do_readonly)
readonly_changed_cb(zfsvfs, vfsp->vfs_readonly);
if (vfsp->vfs_do_setuid)
setuid_changed_cb(zfsvfs, vfsp->vfs_setuid);
if (vfsp->vfs_do_exec)
exec_changed_cb(zfsvfs, vfsp->vfs_exec);
if (vfsp->vfs_do_devices)
devices_changed_cb(zfsvfs, vfsp->vfs_devices);
if (vfsp->vfs_do_xattr)
xattr_changed_cb(zfsvfs, vfsp->vfs_xattr);
if (vfsp->vfs_do_atime)
atime_changed_cb(zfsvfs, vfsp->vfs_atime);
if (vfsp->vfs_do_relatime)
relatime_changed_cb(zfsvfs, vfsp->vfs_relatime);
if (vfsp->vfs_do_nbmand)
nbmand_changed_cb(zfsvfs, vfsp->vfs_nbmand);
return (0);
@ -708,26 +898,8 @@ zfs_owner_overquota(zfsvfs_t *zfsvfs, znode_t *zp, boolean_t isgroup)
return (zfs_fuid_overquota(zfsvfs, isgroup, fuid));
}
zfs_mntopts_t *
zfs_mntopts_alloc(void)
{
return (kmem_zalloc(sizeof (zfs_mntopts_t), KM_SLEEP));
}
void
zfs_mntopts_free(zfs_mntopts_t *zmo)
{
if (zmo->z_osname)
strfree(zmo->z_osname);
if (zmo->z_mntpoint)
strfree(zmo->z_mntpoint);
kmem_free(zmo, sizeof (zfs_mntopts_t));
}
int
zfsvfs_create(const char *osname, zfs_mntopts_t *zmo, zfsvfs_t **zfvp)
zfsvfs_create(const char *osname, zfsvfs_t **zfvp)
{
objset_t *os;
zfsvfs_t *zfsvfs;
@ -737,23 +909,21 @@ zfsvfs_create(const char *osname, zfs_mntopts_t *zmo, zfsvfs_t **zfvp)
zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP);
/*
* Optional temporary mount options, free'd in zfsvfs_free().
*/
zfsvfs->z_mntopts = (zmo ? zmo : zfs_mntopts_alloc());
/*
* We claim to always be readonly so we can open snapshots;
* other ZPL code will prevent us from writing to snapshots.
*/
error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zfsvfs, &os);
if (error)
goto out_zmo;
if (error) {
kmem_free(zfsvfs, sizeof (zfsvfs_t));
return (error);
}
/*
* Initialize the zfs-specific filesystem structure.
* Should probably make this a kmem cache, shuffle fields.
*/
zfsvfs->z_vfs = NULL;
zfsvfs->z_sb = NULL;
zfsvfs->z_parent = zfsvfs;
zfsvfs->z_max_blksz = SPA_OLD_MAXBLOCKSIZE;
@ -889,9 +1059,7 @@ zfsvfs_create(const char *osname, zfs_mntopts_t *zmo, zfsvfs_t **zfvp)
out:
dmu_objset_disown(os, zfsvfs);
out_zmo:
*zfvp = NULL;
zfs_mntopts_free(zfsvfs->z_mntopts);
kmem_free(zfsvfs, sizeof (zfsvfs_t));
return (error);
}
@ -901,7 +1069,7 @@ zfsvfs_setup(zfsvfs_t *zfsvfs, boolean_t mounting)
{
int error;
error = zfs_register_callbacks(zfsvfs);
error = zfs_register_callbacks(zfsvfs->z_vfs);
if (error)
return (error);
@ -997,7 +1165,7 @@ zfsvfs_free(zfsvfs_t *zfsvfs)
}
vmem_free(zfsvfs->z_hold_trees, sizeof (avl_tree_t) * size);
vmem_free(zfsvfs->z_hold_locks, sizeof (kmutex_t) * size);
zfs_mntopts_free(zfsvfs->z_mntopts);
zfsvfs_vfs_free(zfsvfs->z_vfs);
kmem_free(zfsvfs, sizeof (zfsvfs_t));
}
@ -1380,22 +1548,30 @@ atomic_long_t zfs_bdi_seq = ATOMIC_LONG_INIT(0);
#endif
int
zfs_domount(struct super_block *sb, zfs_mntopts_t *zmo, int silent)
zfs_domount(struct super_block *sb, zfs_mnt_t *zm, int silent)
{
const char *osname = zmo->z_osname;
zfsvfs_t *zfsvfs;
const char *osname = zm->mnt_osname;
struct inode *root_inode;
uint64_t recordsize;
int error;
int error = 0;
zfsvfs_t *zfsvfs;
error = zfsvfs_create(osname, zmo, &zfsvfs);
ASSERT(zm);
ASSERT(osname);
error = zfsvfs_create(osname, &zfsvfs);
if (error)
return (error);
error = zfsvfs_parse_options(zm->mnt_data, &zfsvfs->z_vfs);
if (error)
goto out;
if ((error = dsl_prop_get_integer(osname, "recordsize",
&recordsize, NULL)))
goto out;
zfsvfs->z_vfs->vfs_data = zfsvfs;
zfsvfs->z_sb = sb;
sb->s_fs_info = zfsvfs;
sb->s_magic = ZFS_SUPER_MAGIC;
@ -1555,13 +1731,22 @@ zfs_umount(struct super_block *sb)
}
int
zfs_remount(struct super_block *sb, int *flags, zfs_mntopts_t *zmo)
zfs_remount(struct super_block *sb, int *flags, zfs_mnt_t *zm)
{
zfsvfs_t *zfsvfs = sb->s_fs_info;
vfs_t *vfsp;
int error;
error = zfsvfs_parse_options(zm->mnt_data, &vfsp);
if (error)
return (error);
zfs_unregister_callbacks(zfsvfs);
error = zfs_register_callbacks(zfsvfs);
zfsvfs_vfs_free(zfsvfs->z_vfs);
vfsp->vfs_data = zfsvfs;
zfsvfs->z_vfs = vfsp;
(void) zfs_register_callbacks(vfsp);
return (error);
}

226
module/zfs/zpl_super.c
View File

@ -184,211 +184,15 @@ zpl_statfs(struct dentry *dentry, struct kstatfs *statp)
return (error);
}
enum {
TOKEN_RO,
TOKEN_RW,
TOKEN_SETUID,
TOKEN_NOSETUID,
TOKEN_EXEC,
TOKEN_NOEXEC,
TOKEN_DEVICES,
TOKEN_NODEVICES,
TOKEN_DIRXATTR,
TOKEN_SAXATTR,
TOKEN_XATTR,
TOKEN_NOXATTR,
TOKEN_ATIME,
TOKEN_NOATIME,
TOKEN_RELATIME,
TOKEN_NORELATIME,
TOKEN_NBMAND,
TOKEN_NONBMAND,
TOKEN_MNTPOINT,
TOKEN_LAST,
};
static const match_table_t zpl_tokens = {
{ TOKEN_RO, MNTOPT_RO },
{ TOKEN_RW, MNTOPT_RW },
{ TOKEN_SETUID, MNTOPT_SETUID },
{ TOKEN_NOSETUID, MNTOPT_NOSETUID },
{ TOKEN_EXEC, MNTOPT_EXEC },
{ TOKEN_NOEXEC, MNTOPT_NOEXEC },
{ TOKEN_DEVICES, MNTOPT_DEVICES },
{ TOKEN_NODEVICES, MNTOPT_NODEVICES },
{ TOKEN_DIRXATTR, MNTOPT_DIRXATTR },
{ TOKEN_SAXATTR, MNTOPT_SAXATTR },
{ TOKEN_XATTR, MNTOPT_XATTR },
{ TOKEN_NOXATTR, MNTOPT_NOXATTR },
{ TOKEN_ATIME, MNTOPT_ATIME },
{ TOKEN_NOATIME, MNTOPT_NOATIME },
{ TOKEN_RELATIME, MNTOPT_RELATIME },
{ TOKEN_NORELATIME, MNTOPT_NORELATIME },
{ TOKEN_NBMAND, MNTOPT_NBMAND },
{ TOKEN_NONBMAND, MNTOPT_NONBMAND },
{ TOKEN_MNTPOINT, MNTOPT_MNTPOINT "=%s" },
{ TOKEN_LAST, NULL },
};
static int
zpl_parse_option(char *option, int token, substring_t *args, zfs_mntopts_t *zmo)
{
switch (token) {
case TOKEN_RO:
zmo->z_readonly = B_TRUE;
zmo->z_do_readonly = B_TRUE;
break;
case TOKEN_RW:
zmo->z_readonly = B_FALSE;
zmo->z_do_readonly = B_TRUE;
break;
case TOKEN_SETUID:
zmo->z_setuid = B_TRUE;
zmo->z_do_setuid = B_TRUE;
break;
case TOKEN_NOSETUID:
zmo->z_setuid = B_FALSE;
zmo->z_do_setuid = B_TRUE;
break;
case TOKEN_EXEC:
zmo->z_exec = B_TRUE;
zmo->z_do_exec = B_TRUE;
break;
case TOKEN_NOEXEC:
zmo->z_exec = B_FALSE;
zmo->z_do_exec = B_TRUE;
break;
case TOKEN_DEVICES:
zmo->z_devices = B_TRUE;
zmo->z_do_devices = B_TRUE;
break;
case TOKEN_NODEVICES:
zmo->z_devices = B_FALSE;
zmo->z_do_devices = B_TRUE;
break;
case TOKEN_DIRXATTR:
zmo->z_xattr = ZFS_XATTR_DIR;
zmo->z_do_xattr = B_TRUE;
break;
case TOKEN_SAXATTR:
zmo->z_xattr = ZFS_XATTR_SA;
zmo->z_do_xattr = B_TRUE;
break;
case TOKEN_XATTR:
zmo->z_xattr = ZFS_XATTR_DIR;
zmo->z_do_xattr = B_TRUE;
break;
case TOKEN_NOXATTR:
zmo->z_xattr = ZFS_XATTR_OFF;
zmo->z_do_xattr = B_TRUE;
break;
case TOKEN_ATIME:
zmo->z_atime = B_TRUE;
zmo->z_do_atime = B_TRUE;
break;
case TOKEN_NOATIME:
zmo->z_atime = B_FALSE;
zmo->z_do_atime = B_TRUE;
break;
case TOKEN_RELATIME:
zmo->z_relatime = B_TRUE;
zmo->z_do_relatime = B_TRUE;
break;
case TOKEN_NORELATIME:
zmo->z_relatime = B_FALSE;
zmo->z_do_relatime = B_TRUE;
break;
case TOKEN_NBMAND:
zmo->z_nbmand = B_TRUE;
zmo->z_do_nbmand = B_TRUE;
break;
case TOKEN_NONBMAND:
zmo->z_nbmand = B_FALSE;
zmo->z_do_nbmand = B_TRUE;
break;
case TOKEN_MNTPOINT:
zmo->z_mntpoint = match_strdup(&args[0]);
if (zmo->z_mntpoint == NULL)
return (-ENOMEM);
break;
default:
break;
}
return (0);
}
/*
* Parse the mntopts string storing the results in provided zmo argument.
* If an error occurs the zmo argument will not be modified. The caller
* needs to set isremount when recycling an existing zfs_mntopts_t.
*/
static int
zpl_parse_options(char *osname, char *mntopts, zfs_mntopts_t *zmo,
boolean_t isremount)
{
zfs_mntopts_t *tmp_zmo;
int error;
tmp_zmo = zfs_mntopts_alloc();
tmp_zmo->z_osname = strdup(osname);
if (mntopts) {
substring_t args[MAX_OPT_ARGS];
char *tmp_mntopts, *p, *t;
int token;
t = tmp_mntopts = strdup(mntopts);
while ((p = strsep(&t, ",")) != NULL) {
if (!*p)
continue;
args[0].to = args[0].from = NULL;
token = match_token(p, zpl_tokens, args);
error = zpl_parse_option(p, token, args, tmp_zmo);
if (error) {
zfs_mntopts_free(tmp_zmo);
strfree(tmp_mntopts);
return (error);
}
}
strfree(tmp_mntopts);
}
if (isremount == B_TRUE) {
if (zmo->z_osname)
strfree(zmo->z_osname);
if (zmo->z_mntpoint)
strfree(zmo->z_mntpoint);
} else {
ASSERT3P(zmo->z_osname, ==, NULL);
ASSERT3P(zmo->z_mntpoint, ==, NULL);
}
memcpy(zmo, tmp_zmo, sizeof (zfs_mntopts_t));
kmem_free(tmp_zmo, sizeof (zfs_mntopts_t));
return (0);
}
static int
zpl_remount_fs(struct super_block *sb, int *flags, char *data)
{
zfsvfs_t *zfsvfs = sb->s_fs_info;
zfs_mnt_t zm = { .mnt_osname = NULL, .mnt_data = data };
fstrans_cookie_t cookie;
int error;
error = zpl_parse_options(zfsvfs->z_mntopts->z_osname, data,
zfsvfs->z_mntopts, B_TRUE);
if (error)
return (error);
cookie = spl_fstrans_mark();
error = -zfs_remount(sb, flags, zfsvfs->z_mntopts);
error = -zfs_remount(sb, flags, &zm);
spl_fstrans_unmark(cookie);
ASSERT3S(error, <=, 0);
@ -432,12 +236,12 @@ zpl_show_options(struct seq_file *seq, struct vfsmount *vfsp)
static int
zpl_fill_super(struct super_block *sb, void *data, int silent)
{
zfs_mntopts_t *zmo = (zfs_mntopts_t *)data;
zfs_mnt_t *zm = (zfs_mnt_t *)data;
fstrans_cookie_t cookie;
int error;
cookie = spl_fstrans_mark();
error = -zfs_domount(sb, zmo, silent);
error = -zfs_domount(sb, zm, silent);
spl_fstrans_unmark(cookie);
ASSERT3S(error, <=, 0);
@ -449,32 +253,18 @@ static struct dentry *
zpl_mount(struct file_system_type *fs_type, int flags,
const char *osname, void *data)
{
zfs_mntopts_t *zmo = zfs_mntopts_alloc();
int error;
zfs_mnt_t zm = { .mnt_osname = osname, .mnt_data = data };
error = zpl_parse_options((char *)osname, (char *)data, zmo, B_FALSE);
if (error) {
zfs_mntopts_free(zmo);
return (ERR_PTR(error));
}
return (mount_nodev(fs_type, flags, zmo, zpl_fill_super));
return (mount_nodev(fs_type, flags, &zm, zpl_fill_super));
}
#else
static int
zpl_get_sb(struct file_system_type *fs_type, int flags,
const char *osname, void *data, struct vfsmount *mnt)
{
zfs_mntopts_t *zmo = zfs_mntopts_alloc();
int error;
zfs_mnt_t zm = { .mnt_osname = osname, .mnt_data = data };
error = zpl_parse_options((char *)osname, (char *)data, zmo, B_FALSE);
if (error) {
zfs_mntopts_free(zmo);
return (error);
}
return (get_sb_nodev(fs_type, flags, zmo, zpl_fill_super, mnt));
return (get_sb_nodev(fs_type, flags, &zm, zpl_fill_super, mnt));
}
#endif /* HAVE_MOUNT_NODEV */