Merge commit 'refs/top-bases/linux-configure-branch' into linux-configure-branch

This commit is contained in:
Brian Behlendorf 2010-08-02 12:55:02 -07:00
commit ca60603ce7
10 changed files with 481 additions and 188 deletions

View File

@ -190,6 +190,8 @@ zfs_handle_t *make_dataset_handle(libzfs_handle_t *, const char *);
int zpool_open_silent(libzfs_handle_t *, const char *, zpool_handle_t **);
int zvol_create_link(libzfs_handle_t *, const char *);
int zvol_remove_link(libzfs_handle_t *, const char *);
boolean_t zpool_name_valid(libzfs_handle_t *, boolean_t, const char *);
void namespace_clear(libzfs_handle_t *);

View File

@ -58,6 +58,7 @@
#include "libzfs_impl.h"
#include "zfs_deleg.h"
static int zvol_create_link_common(libzfs_handle_t *, const char *, int);
static int userquota_propname_decode(const char *propname, boolean_t zoned,
zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
@ -2868,6 +2869,18 @@ zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
/* create the dataset */
ret = zfs_ioctl(hdl, ZFS_IOC_CREATE, &zc);
if (ret == 0 && type == ZFS_TYPE_VOLUME) {
ret = zvol_create_link(hdl, path);
if (ret) {
(void) zfs_standard_error(hdl, errno,
dgettext(TEXT_DOMAIN,
"Volume successfully created, but device links "
"were not created"));
zcmd_free_nvlists(&zc);
return (-1);
}
}
zcmd_free_nvlists(&zc);
/* check for failure */
@ -2930,6 +2943,9 @@ zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
if (ZFS_IS_VOLUME(zhp)) {
if (zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name) != 0)
return (-1);
zc.zc_objset_type = DMU_OST_ZVOL;
} else {
zc.zc_objset_type = DMU_OST_ZFS;
@ -2972,9 +2988,17 @@ zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
zfs_close(szhp);
}
if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
(void) zvol_remove_link(zhp->zfs_hdl, name);
/*
* NB: this is simply a best-effort. We don't want to
* return an error, because then we wouldn't visit all
* the volumes.
*/
}
dd->closezhp = B_TRUE;
if (!dd->gotone)
rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, arg);
rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, arg);
if (closezhp)
zfs_close(zhp);
return (rv);
@ -3109,11 +3133,70 @@ zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
return (zfs_standard_error(zhp->zfs_hdl, errno,
errbuf));
}
} else if (ZFS_IS_VOLUME(zhp)) {
ret = zvol_create_link(zhp->zfs_hdl, target);
}
return (ret);
}
typedef struct promote_data {
char cb_mountpoint[MAXPATHLEN];
const char *cb_target;
const char *cb_errbuf;
uint64_t cb_pivot_txg;
} promote_data_t;
static int
promote_snap_cb(zfs_handle_t *zhp, void *data)
{
promote_data_t *pd = data;
zfs_handle_t *szhp;
char snapname[MAXPATHLEN];
int rv = 0;
/* We don't care about snapshots after the pivot point */
if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > pd->cb_pivot_txg) {
zfs_close(zhp);
return (0);
}
/* Remove the device link if it's a zvol. */
if (ZFS_IS_VOLUME(zhp))
(void) zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name);
/* Check for conflicting names */
(void) strlcpy(snapname, pd->cb_target, sizeof (snapname));
(void) strlcat(snapname, strchr(zhp->zfs_name, '@'), sizeof (snapname));
szhp = make_dataset_handle(zhp->zfs_hdl, snapname);
if (szhp != NULL) {
zfs_close(szhp);
zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
"snapshot name '%s' from origin \n"
"conflicts with '%s' from target"),
zhp->zfs_name, snapname);
rv = zfs_error(zhp->zfs_hdl, EZFS_EXISTS, pd->cb_errbuf);
}
zfs_close(zhp);
return (rv);
}
static int
promote_snap_done_cb(zfs_handle_t *zhp, void *data)
{
promote_data_t *pd = data;
/* We don't care about snapshots after the pivot point */
if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) <= pd->cb_pivot_txg) {
/* Create the device link if it's a zvol. */
if (ZFS_IS_VOLUME(zhp))
(void) zvol_create_link(zhp->zfs_hdl, zhp->zfs_name);
}
zfs_close(zhp);
return (0);
}
/*
* Promotes the given clone fs to be the clone parent.
*/
@ -3123,7 +3206,10 @@ zfs_promote(zfs_handle_t *zhp)
libzfs_handle_t *hdl = zhp->zfs_hdl;
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
char parent[MAXPATHLEN];
char *cp;
int ret;
zfs_handle_t *pzhp;
promote_data_t pd;
char errbuf[1024];
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
@ -3141,7 +3227,29 @@ zfs_promote(zfs_handle_t *zhp)
"not a cloned filesystem"));
return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
}
cp = strchr(parent, '@');
*cp = '\0';
/* Walk the snapshots we will be moving */
pzhp = zfs_open(hdl, zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT);
if (pzhp == NULL)
return (-1);
pd.cb_pivot_txg = zfs_prop_get_int(pzhp, ZFS_PROP_CREATETXG);
zfs_close(pzhp);
pd.cb_target = zhp->zfs_name;
pd.cb_errbuf = errbuf;
pzhp = zfs_open(hdl, parent, ZFS_TYPE_DATASET);
if (pzhp == NULL)
return (-1);
(void) zfs_prop_get(pzhp, ZFS_PROP_MOUNTPOINT, pd.cb_mountpoint,
sizeof (pd.cb_mountpoint), NULL, NULL, 0, FALSE);
ret = zfs_iter_snapshots(pzhp, promote_snap_cb, &pd);
if (ret != 0) {
zfs_close(pzhp);
return (-1);
}
/* issue the ioctl */
(void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
sizeof (zc.zc_value));
(void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
@ -3150,9 +3258,16 @@ zfs_promote(zfs_handle_t *zhp)
if (ret != 0) {
int save_errno = errno;
(void) zfs_iter_snapshots(pzhp, promote_snap_done_cb, &pd);
zfs_close(pzhp);
switch (save_errno) {
case EEXIST:
/* There is a conflicting snapshot name. */
/*
* There is a conflicting snapshot name. We
* should have caught this above, but they could
* have renamed something in the mean time.
*/
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"conflicting snapshot '%s' from parent '%s'"),
zc.zc_string, parent);
@ -3161,7 +3276,44 @@ zfs_promote(zfs_handle_t *zhp)
default:
return (zfs_standard_error(hdl, save_errno, errbuf));
}
} else {
(void) zfs_iter_snapshots(zhp, promote_snap_done_cb, &pd);
}
zfs_close(pzhp);
return (ret);
}
struct createdata {
const char *cd_snapname;
int cd_ifexists;
};
static int
zfs_create_link_cb(zfs_handle_t *zhp, void *arg)
{
struct createdata *cd = arg;
int ret;
if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
char name[MAXPATHLEN];
(void) strlcpy(name, zhp->zfs_name, sizeof (name));
(void) strlcat(name, "@", sizeof (name));
(void) strlcat(name, cd->cd_snapname, sizeof (name));
(void) zvol_create_link_common(zhp->zfs_hdl, name,
cd->cd_ifexists);
/*
* NB: this is simply a best-effort. We don't want to
* return an error, because then we wouldn't visit all
* the volumes.
*/
}
ret = zfs_iter_filesystems(zhp, zfs_create_link_cb, cd);
zfs_close(zhp);
return (ret);
}
@ -3225,11 +3377,31 @@ zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
* if it was recursive, the one that actually failed will be in
* zc.zc_name.
*/
if (ret != 0) {
if (ret != 0)
(void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
"cannot create snapshot '%s@%s'"), zc.zc_name, zc.zc_value);
(void) zfs_standard_error(hdl, errno, errbuf);
if (ret == 0 && recursive) {
struct createdata cd;
cd.cd_snapname = delim + 1;
cd.cd_ifexists = B_FALSE;
(void) zfs_iter_filesystems(zhp, zfs_create_link_cb, &cd);
}
if (ret == 0 && zhp->zfs_type == ZFS_TYPE_VOLUME) {
ret = zvol_create_link(zhp->zfs_hdl, path);
if (ret != 0) {
(void) zfs_standard_error(hdl, errno,
dgettext(TEXT_DOMAIN,
"Volume successfully snapshotted, but device links "
"were not created"));
zfs_close(zhp);
return (-1);
}
}
if (ret != 0)
(void) zfs_standard_error(hdl, errno, errbuf);
zfs_close(zhp);
@ -3332,6 +3504,8 @@ zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
*/
if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
if (zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name) != 0)
return (-1);
if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
return (-1);
old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
@ -3369,6 +3543,10 @@ zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
*/
if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
(zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
if ((err = zvol_create_link(zhp->zfs_hdl, zhp->zfs_name))) {
zfs_close(zhp);
return (err);
}
if (restore_resv) {
new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
if (old_volsize != new_volsize)
@ -3517,6 +3695,7 @@ zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive)
}
if (recursive) {
struct destroydata dd;
parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
if (parentname == NULL) {
@ -3531,6 +3710,15 @@ zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive)
goto error;
}
dd.snapname = delim + 1;
dd.gotone = B_FALSE;
dd.closezhp = B_TRUE;
/* We remove any zvol links prior to renaming them */
ret = zfs_iter_filesystems(zhrp, zfs_check_snap_cb, &dd);
if (ret) {
goto error;
}
} else {
if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0, 0)) == NULL)
return (-1);
@ -3579,10 +3767,27 @@ zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive)
* On failure, we still want to remount any filesystems that
* were previously mounted, so we don't alter the system state.
*/
if (!recursive)
if (recursive) {
struct createdata cd;
/* only create links for datasets that had existed */
cd.cd_snapname = delim + 1;
cd.cd_ifexists = B_TRUE;
(void) zfs_iter_filesystems(zhrp, zfs_create_link_cb,
&cd);
} else {
(void) changelist_postfix(cl);
}
} else {
if (!recursive) {
if (recursive) {
struct createdata cd;
/* only create links for datasets that had existed */
cd.cd_snapname = strchr(target, '@') + 1;
cd.cd_ifexists = B_TRUE;
ret = zfs_iter_filesystems(zhrp, zfs_create_link_cb,
&cd);
} else {
changelist_rename(cl, zfs_get_name(zhp), target);
ret = changelist_postfix(cl);
}
@ -3601,21 +3806,105 @@ error:
return (ret);
}
/*
* Given a zvol dataset, issue the ioctl to create the appropriate minor node,
* and wait briefly for udev to create the /dev link.
*/
int
zvol_create_link(libzfs_handle_t *hdl, const char *dataset)
{
return (zvol_create_link_common(hdl, dataset, B_FALSE));
}
static int
zvol_create_link_common(libzfs_handle_t *hdl, const char *dataset, int ifexists)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
char path[MAXPATHLEN];
int error;
(void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
/*
* Issue the appropriate ioctl.
*/
if (ioctl(hdl->libzfs_fd, ZFS_IOC_CREATE_MINOR, &zc) != 0) {
switch (errno) {
case EEXIST:
/*
* Silently ignore the case where the link already
* exists. This allows 'zfs volinit' to be run multiple
* times without errors.
*/
return (0);
case ENOENT:
/*
* Dataset does not exist in the kernel. If we
* don't care (see zfs_rename), then ignore the
* error quietly.
*/
if (ifexists) {
return (0);
}
/* FALLTHROUGH */
default:
return (zfs_standard_error_fmt(hdl, errno,
dgettext(TEXT_DOMAIN, "cannot create device links "
"for '%s'"), dataset));
}
}
/*
* Wait up to 10 seconds for udev to create the device.
*/
(void) snprintf(path, sizeof (path), "%s/%s", ZVOL_DIR, dataset);
error = zpool_label_disk_wait(path, 10000);
if (error)
(void) printf(gettext("%s may not be immediately "
"available\n"), path);
return (0);
}
/*
* Remove a minor node for the given zvol and the associated /dev links.
*/
int
zvol_remove_link(libzfs_handle_t *hdl, const char *dataset)
{
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
(void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
if (ioctl(hdl->libzfs_fd, ZFS_IOC_REMOVE_MINOR, &zc) != 0) {
switch (errno) {
case ENXIO:
/*
* Silently ignore the case where the link no longer
* exists, so that 'zfs volfini' can be run multiple
* times without errors.
*/
return (0);
default:
return (zfs_standard_error_fmt(hdl, errno,
dgettext(TEXT_DOMAIN, "cannot remove device "
"links for '%s'"), dataset));
}
}
return (0);
}
nvlist_t *
zfs_get_user_props(zfs_handle_t *zhp)
{
return (zhp->zfs_user_props);
}
nvlist_t *
zfs_get_recvd_props(zfs_handle_t *zhp)
{
if (zhp->zfs_recvd_props == NULL)
if (get_recvd_props_ioctl(zhp) != 0)
return (NULL);
return (zhp->zfs_recvd_props);
}
/*
* This function is used by 'zfs list' to determine the exact set of columns to
* display, and their maximum widths. This does two main things:

View File

@ -3663,7 +3663,7 @@ zpool_label_disk_check(char *path)
(void) close(fd);
return EIDRM;
}
efi_free(vtoc);
(void) close(fd);
return 0;

View File

@ -2562,6 +2562,12 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
return (-1);
}
}
if (!flags.dryrun && zhp->zfs_type == ZFS_TYPE_VOLUME &&
zvol_remove_link(hdl, zhp->zfs_name) != 0) {
zfs_close(zhp);
zcmd_free_nvlists(&zc);
return (-1);
}
zfs_close(zhp);
} else {
/*
@ -2755,7 +2761,6 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
* children of the target filesystem if we did a replication
* receive (indicated by stream_avl being non-NULL).
*/
#ifdef HAVE_ZPL
cp = strchr(zc.zc_value, '@');
if (cp && (ioctl_err == 0 || !newfs)) {
zfs_handle_t *h;
@ -2766,6 +2771,10 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
if (h != NULL) {
if (h->zfs_type == ZFS_TYPE_VOLUME) {
*cp = '@';
err = zvol_create_link(hdl, h->zfs_name);
if (err == 0 && ioctl_err == 0)
err = zvol_create_link(hdl,
zc.zc_value);
} else if (newfs || stream_avl) {
/*
* Track the first/top of hierarchy fs,
@ -2778,7 +2787,6 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
}
*cp = '@';
}
#endif /* HAVE_ZPL */
if (clp) {
err |= changelist_postfix(clp);

View File

@ -686,13 +686,17 @@ typedef struct ddt_histogram {
ddt_stat_t ddh_stat[64]; /* power-of-two histogram buckets */
} ddt_histogram_t;
#define ZVOL_DRIVER "zvol"
#define ZFS_DRIVER "zfs"
#define ZFS_DEV "/dev/zfs"
#define ZVOL_MAJOR 230
#define ZVOL_MINOR_BITS 4
#define ZVOL_MINOR_MASK ((1U << ZVOL_MINOR_BITS) - 1)
#define ZVOL_MINORS (1 << 4)
#define ZVOL_DRIVER "zvol"
#define ZFS_DRIVER "zfs"
#define ZFS_DEV "/dev/zfs"
/* general zvol path */
#define ZVOL_DIR "/dev/zvol"
#define ZVOL_MAJOR 230
#define ZVOL_MINOR_BITS 4
#define ZVOL_MINOR_MASK ((1U << ZVOL_MINOR_BITS) - 1)
#define ZVOL_MINORS (1 << 4)
#define ZVOL_PROP_NAME "name"
#define ZVOL_DEFAULT_BLOCKSIZE 8192
@ -726,6 +730,8 @@ typedef enum zfs_ioc {
ZFS_IOC_DATASET_LIST_NEXT,
ZFS_IOC_SNAPSHOT_LIST_NEXT,
ZFS_IOC_SET_PROP,
ZFS_IOC_CREATE_MINOR,
ZFS_IOC_REMOVE_MINOR,
ZFS_IOC_CREATE,
ZFS_IOC_DESTROY,
ZFS_IOC_ROLLBACK,

View File

@ -42,7 +42,7 @@ extern void zvol_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
extern int zvol_create_minor(const char *);
extern int zvol_create_minors(const char *);
extern int zvol_remove_minor(const char *);
extern int zvol_remove_minors(const char *);
extern void zvol_remove_minors(const char *);
extern int zvol_set_volsize(const char *, uint64_t);
extern int zvol_set_volblocksize(const char *, uint64_t);

View File

@ -1072,12 +1072,6 @@ vdev_open_child(void *arg)
boolean_t
vdev_uses_zvols(vdev_t *vd)
{
/*
* NOTE: Disabled because under Linux I've choosen not to put all the zvols
* in their own directory. This could be changed or this code can be updated
* to perhap run an ioctl() on the vdev path to determine if it is a zvol.
*/
#if 0
int c;
if (vd->vdev_path && strncmp(vd->vdev_path, ZVOL_DIR,
@ -1086,7 +1080,6 @@ vdev_uses_zvols(vdev_t *vd)
for (c = 0; c < vd->vdev_children; c++)
if (vdev_uses_zvols(vd->vdev_child[c]))
return (B_TRUE);
#endif
return (B_FALSE);
}

View File

@ -1135,8 +1135,9 @@ zfs_ioc_pool_destroy(struct file *filp, zfs_cmd_t *zc)
{
int error;
zfs_log_history(zc);
(void) zvol_remove_minors(zc->zc_name);
error = spa_destroy(zc->zc_name);
if (error == 0)
zvol_remove_minors(zc->zc_name);
return (error);
}
@ -1167,7 +1168,7 @@ zfs_ioc_pool_import(struct file *filp, zfs_cmd_t *zc)
error = spa_import(zc->zc_name, config, props);
if (error == 0)
error = zvol_create_minors(zc->zc_name);
zvol_create_minors(zc->zc_name);
if (zc->zc_nvlist_dst != 0)
(void) put_nvlist(zc, config);
@ -1188,10 +1189,9 @@ zfs_ioc_pool_export(struct file *filp, zfs_cmd_t *zc)
boolean_t hardforce = (boolean_t)zc->zc_guid;
zfs_log_history(zc);
error = zvol_remove_minors(zc->zc_name);
error = spa_export(zc->zc_name, NULL, force, hardforce);
if (error == 0)
error = spa_export(zc->zc_name, NULL, force, hardforce);
zvol_remove_minors(zc->zc_name);
return (error);
}
@ -2467,6 +2467,30 @@ zfs_ioc_pool_get_props(struct file *filp, zfs_cmd_t *zc)
return (error);
}
/*
* inputs:
* zc_name name of volume
*
* outputs: none
*/
static int
zfs_ioc_create_minor(struct file *filp, zfs_cmd_t *zc)
{
return (zvol_create_minor(zc->zc_name));
}
/*
* inputs:
* zc_name name of volume
*
* outputs: none
*/
static int
zfs_ioc_remove_minor(struct file *filp, zfs_cmd_t *zc)
{
return (zvol_remove_minor(zc->zc_name));
}
/*
* inputs:
* zc_name name of filesystem
@ -2865,18 +2889,9 @@ zfs_ioc_create(struct file *filp, zfs_cmd_t *zc)
if (error == 0) {
error = zfs_set_prop_nvlist(filp, zc->zc_name, ZPROP_SRC_LOCAL,
nvprops, NULL);
if (error != 0) {
if (error != 0)
(void) dmu_objset_destroy(zc->zc_name, B_FALSE);
goto out;
}
if (type == DMU_OST_ZVOL) {
error = zvol_create_minor(zc->zc_name);
if (error != 0)
(void) dmu_objset_destroy(zc->zc_name, B_FALSE);
}
}
out:
nvlist_free(nvprops);
return (error);
}
@ -3001,7 +3016,7 @@ zfs_ioc_destroy(struct file *filp, zfs_cmd_t *zc)
err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy);
if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
err = zvol_remove_minor(zc->zc_name);
(void) zvol_remove_minor(zc->zc_name);
return (err);
}
@ -3105,7 +3120,6 @@ static int
zfs_ioc_rename(struct file *filp, zfs_cmd_t *zc)
{
boolean_t recursive = zc->zc_cookie & 1;
int err;
zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
@ -3119,16 +3133,12 @@ zfs_ioc_rename(struct file *filp, zfs_cmd_t *zc)
*/
if (!recursive && strchr(zc->zc_name, '@') != NULL &&
zc->zc_objset_type == DMU_OST_ZFS) {
err = zfs_unmount_snap(zc->zc_name, NULL);
int err = zfs_unmount_snap(zc->zc_name, NULL);
if (err)
return (err);
}
if (zc->zc_objset_type == DMU_OST_ZVOL) {
err = zvol_remove_minor(zc->zc_name);
if (err)
return (err);
}
if (zc->zc_objset_type == DMU_OST_ZVOL)
(void) zvol_remove_minor(zc->zc_name);
return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive));
}
@ -4426,6 +4436,10 @@ static zfs_ioc_vec_t zfs_ioc_vec[] = {
{ zfs_ioc_snapshot_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
B_TRUE },
{ zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE, B_TRUE },
{ zfs_ioc_create_minor, zfs_secpolicy_config, DATASET_NAME, B_FALSE,
B_FALSE },
{ zfs_ioc_remove_minor, zfs_secpolicy_config, DATASET_NAME, B_FALSE,
B_FALSE },
{ zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE, B_TRUE },
{ zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE,
B_TRUE},

View File

@ -57,6 +57,7 @@ static char *zvol_tag = "zvol_tag";
* The in-core state of each volume.
*/
typedef struct zvol_state {
char zv_name[DISK_NAME_LEN]; /* name */
uint64_t zv_volsize; /* advertised space */
uint64_t zv_volblocksize;/* volume block size */
objset_t *zv_objset; /* objset handle */
@ -130,7 +131,7 @@ zvol_find_by_name(const char *name)
ASSERT(MUTEX_HELD(&zvol_state_lock));
for (zv = list_head(&zvol_state_list); zv != NULL;
zv = list_next(&zvol_state_list, zv)) {
if (!strncmp(zv->zv_disk->disk_name, name, DISK_NAME_LEN))
if (!strncmp(zv->zv_name, name, DISK_NAME_LEN))
return zv;
}
@ -182,7 +183,7 @@ int
zvol_get_stats(objset_t *os, nvlist_t *nv)
{
int error;
dmu_object_info_t doi;
dmu_object_info_t *doi;
uint64_t val;
error = zap_lookup(os, ZVOL_ZAP_OBJ, "size", 8, 1, &val);
@ -190,14 +191,16 @@ zvol_get_stats(objset_t *os, nvlist_t *nv)
return (error);
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_VOLSIZE, val);
error = dmu_object_info(os, ZVOL_OBJ, &doi);
doi = kmem_alloc(sizeof(dmu_object_info_t), KM_SLEEP);
error = dmu_object_info(os, ZVOL_OBJ, doi);
if (error == 0) {
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_VOLBLOCKSIZE,
doi.doi_data_block_size);
doi->doi_data_block_size);
}
kmem_free(doi, sizeof(dmu_object_info_t));
return (error);
}
@ -273,7 +276,7 @@ int
zvol_set_volsize(const char *name, uint64_t volsize)
{
zvol_state_t *zv;
dmu_object_info_t doi;
dmu_object_info_t *doi;
objset_t *os = NULL;
uint64_t readonly;
int error;
@ -286,26 +289,30 @@ zvol_set_volsize(const char *name, uint64_t volsize)
goto out;
}
doi = kmem_alloc(sizeof(dmu_object_info_t), KM_SLEEP);
error = dmu_objset_hold(name, FTAG, &os);
if (error)
goto out;
goto out_doi;
if ((error = dmu_object_info(os, ZVOL_OBJ, &doi)) != 0 ||
(error = zvol_check_volsize(volsize,doi.doi_data_block_size)) != 0)
goto out;
if ((error = dmu_object_info(os, ZVOL_OBJ, doi)) != 0 ||
(error = zvol_check_volsize(volsize,doi->doi_data_block_size)) != 0)
goto out_doi;
VERIFY(dsl_prop_get_integer(name, "readonly", &readonly, NULL) == 0);
if (readonly) {
error = EROFS;
goto out;
goto out_doi;
}
if (get_disk_ro(zv->zv_disk) || (zv->zv_flags & ZVOL_RDONLY)) {
error = EROFS;
goto out;
goto out_doi;
}
error = zvol_update_volsize(zv, volsize);
out_doi:
kmem_free(doi, sizeof(dmu_object_info_t));
out:
if (os)
dmu_objset_rele(os, FTAG);
@ -757,11 +764,10 @@ zvol_first_open(zvol_state_t *zv)
objset_t *os;
uint64_t volsize;
int error;
uint64_t readonly;
uint64_t ro;
/* lie and say we're read-only */
error = dmu_objset_own(zv->zv_disk->disk_name,
DMU_OST_ZVOL, B_TRUE, zvol_tag, &os);
error = dmu_objset_own(zv->zv_name, DMU_OST_ZVOL, 1, zvol_tag, &os);
if (error)
return (-error);
@ -782,9 +788,8 @@ zvol_first_open(zvol_state_t *zv)
zv->zv_volsize = volsize;
zv->zv_zilog = zil_open(os, zvol_get_data);
VERIFY(dsl_prop_get_integer(zv->zv_disk->disk_name,
"readonly", &readonly, NULL) == 0);
if (readonly || dmu_objset_is_snapshot(os)) {
VERIFY(dsl_prop_get_integer(zv->zv_name, "readonly", &ro, NULL) == 0);
if (ro || dmu_objset_is_snapshot(os)) {
set_disk_ro(zv->zv_disk, 1);
zv->zv_flags |= ZVOL_RDONLY;
} else {
@ -1031,6 +1036,7 @@ zvol_alloc(dev_t dev, const char *name)
zv->zv_queue->queuedata = zv;
zv->zv_dev = dev;
zv->zv_open_count = 0;
strlcpy(zv->zv_name, name, DISK_NAME_LEN);
mutex_init(&zv->zv_znode.z_range_lock, NULL, MUTEX_DEFAULT, NULL);
avl_create(&zv->zv_znode.z_range_avl, zfs_range_compare,
@ -1043,7 +1049,7 @@ zvol_alloc(dev_t dev, const char *name)
zv->zv_disk->fops = &zvol_ops;
zv->zv_disk->private_data = zv;
zv->zv_disk->queue = zv->zv_queue;
strlcpy(zv->zv_disk->disk_name, name, DISK_NAME_LEN);
snprintf(zv->zv_disk->disk_name, DISK_NAME_LEN, "zvol/%s", name);
return zv;
@ -1071,21 +1077,16 @@ zvol_free(zvol_state_t *zv)
kmem_free(zv, sizeof (zvol_state_t));
}
/*
* Create a block device minor node and setup the linkage between it
* and the specified volume. Once this function returns the block
* device is live and ready for use.
*/
int
zvol_create_minor(const char *name)
static int
__zvol_create_minor(const char *name)
{
zvol_state_t *zv;
objset_t *os;
dmu_object_info_t doi;
dmu_object_info_t *doi;
unsigned minor = 0;
int error = 0;
mutex_enter(&zvol_state_lock);
ASSERT(MUTEX_HELD(&zvol_state_lock));
zv = zvol_find_by_name(name);
if (zv) {
@ -1093,11 +1094,13 @@ zvol_create_minor(const char *name)
goto out;
}
doi = kmem_alloc(sizeof(dmu_object_info_t), KM_SLEEP);
error = dmu_objset_own(name, DMU_OST_ZVOL, B_TRUE, zvol_tag, &os);
if (error)
goto out;
goto out_doi;
error = dmu_object_info(os, ZVOL_OBJ, &doi);
error = dmu_object_info(os, ZVOL_OBJ, doi);
if (error)
goto out_dmu_objset_disown;
@ -1114,7 +1117,7 @@ zvol_create_minor(const char *name)
if (dmu_objset_is_snapshot(os))
zv->zv_flags |= ZVOL_RDONLY;
zv->zv_volblocksize = doi.doi_data_block_size;
zv->zv_volblocksize = doi->doi_data_block_size;
if (zil_replay_disable)
zil_destroy(dmu_objset_zil(os), B_FALSE);
@ -1127,10 +1130,47 @@ zvol_create_minor(const char *name)
out_dmu_objset_disown:
dmu_objset_disown(os, zvol_tag);
out_doi:
kmem_free(doi, sizeof(dmu_object_info_t));
out:
return (error);
}
/*
* Create a block device minor node and setup the linkage between it
* and the specified volume. Once this function returns the block
* device is live and ready for use.
*/
int
zvol_create_minor(const char *name)
{
int error;
mutex_enter(&zvol_state_lock);
error = __zvol_create_minor(name);
mutex_exit(&zvol_state_lock);
return (-error);
return (error);
}
static int
__zvol_remove_minor(const char *name)
{
zvol_state_t *zv;
ASSERT(MUTEX_HELD(&zvol_state_lock));
zv = zvol_find_by_name(name);
if (zv == NULL)
return (ENXIO);
if (zv->zv_open_count > 0)
return (EBUSY);
zvol_remove(zv);
zvol_free(zv);
return (0);
}
/*
@ -1139,25 +1179,10 @@ out:
int
zvol_remove_minor(const char *name)
{
zvol_state_t *zv;
int error = 0;
int error;
mutex_enter(&zvol_state_lock);
zv = zvol_find_by_name(name);
if (zv == NULL) {
error = ENXIO;
goto out;
}
if (zv->zv_open_count > 0) {
error = EBUSY;
goto out;
}
zvol_remove(zv);
zvol_free(zv);
out:
error = __zvol_remove_minor(name);
mutex_exit(&zvol_state_lock);
return (error);
@ -1170,59 +1195,65 @@ zvol_create_minors_cb(spa_t *spa, uint64_t dsobj,
if (strchr(dsname, '/') == NULL)
return 0;
return zvol_create_minor(dsname);
return __zvol_create_minor(dsname);
}
static int
zvol_remove_minors_cb(spa_t *spa, uint64_t dsobj,
const char *dsname, void *arg)
{
if (strchr(dsname, '/') == NULL)
return 0;
return zvol_remove_minor(dsname);
}
static int
zvol_cr_minors_common(const char *pool,
int func(spa_t *, uint64_t, const char *, void *), void *arg)
/*
* Create minors for specified pool, if pool is NULL create minors
* for all available pools.
*/
int
zvol_create_minors(const char *pool)
{
spa_t *spa = NULL;
int error = 0;
mutex_enter(&zvol_state_lock);
if (pool) {
error = dmu_objset_find_spa(NULL, pool, func, arg,
DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS);
error = dmu_objset_find_spa(NULL, pool, zvol_create_minors_cb,
NULL, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS);
} else {
mutex_enter(&spa_namespace_lock);
while ((spa = spa_next(spa)) != NULL) {
error = dmu_objset_find_spa(NULL, spa_name(spa),
func, arg, DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS);
error = dmu_objset_find_spa(NULL,
spa_name(spa), zvol_create_minors_cb, NULL,
DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS);
if (error)
break;
}
mutex_exit(&spa_namespace_lock);
}
mutex_exit(&zvol_state_lock);
return error;
}
/*
* Create minors for specified pool, or if NULL create all minors.
* Remove minors for specified pool, if pool is NULL remove all minors.
*/
int
zvol_create_minors(const char *pool)
{
return zvol_cr_minors_common(pool, zvol_create_minors_cb, NULL);
}
/*
* Remove minors for specified pool, or if NULL remove all minors.
*/
int
void
zvol_remove_minors(const char *pool)
{
return zvol_cr_minors_common(pool, zvol_remove_minors_cb, NULL);
zvol_state_t *zv, *zv_next;
char *str;
str = kmem_zalloc(DISK_NAME_LEN, KM_SLEEP);
if (pool) {
(void) strncpy(str, pool, strlen(pool));
(void) strcat(str, "/");
}
mutex_enter(&zvol_state_lock);
for (zv = list_head(&zvol_state_list); zv != NULL; zv = zv_next) {
zv_next = list_next(&zvol_state_list, zv);
if (pool == NULL || !strncmp(str, zv->zv_name, strlen(str))) {
zvol_remove(zv);
zvol_free(zv);
}
}
mutex_exit(&zvol_state_lock);
kmem_free(str, DISK_NAME_LEN);
}
int
@ -1262,12 +1293,10 @@ zvol_init(void)
void
zvol_fini(void)
{
(void) zvol_remove_minors(NULL);
zvol_remove_minors(NULL);
blk_unregister_region(MKDEV(zvol_major, 0), 1UL << MINORBITS);
unregister_blkdev(zvol_major, ZVOL_DRIVER);
taskq_destroy(zvol_taskq);
mutex_destroy(&zvol_state_lock);
list_destroy(&zvol_state_list);
}

View File

@ -159,52 +159,4 @@ EOF
}
zconfig_test3
# zpool import/export check
zconfig_test4() {
POOL_NAME=test4
ZVOL_NAME1=fish1
ZVOL_NAME2=fish2
FULL_NAME1=${POOL_NAME}/${ZVOL_NAME1}
FULL_NAME2=${POOL_NAME}/${ZVOL_NAME2}
TMP_CACHE=`mktemp -p /tmp zpool.cache.XXXXXXXX`
echo -n "test 4 - zpool import/export: "
# Create a pool and volume.
${ZFS_SH} zfs="spa_config_path=${TMP_CACHE}" || fail 1
${ZPOOL_CREATE_SH} -p ${POOL_NAME} -c lo-raidz2 || fail 2
${ZFS} create -V 100M ${FULL_NAME1} || fail 3
${ZFS} create -V 100M ${FULL_NAME2} || fail 4
# Verify the devices were created
stat /dev/${FULL_NAME1} &>/dev/null || fail 5
stat /dev/${FULL_NAME2} &>/dev/null || fail 6
# Export the pool
${ZPOOL} export ${POOL_NAME} || fail 7
# Verify the devices were removed
stat /dev/${FULL_NAME1} &>/dev/null && fail 8
stat /dev/${FULL_NAME2} &>/dev/null && fail 9
# Import the pool
${ZPOOL} import ${POOL_NAME} || fail 10
# Verify the devices were created
stat /dev/${FULL_NAME1} &>/dev/null || fail 11
stat /dev/${FULL_NAME2} &>/dev/null || fail 12
# Destroy the pool and consequently the devices
${ZPOOL_CREATE_SH} -p ${POOL_NAME} -c lo-raidz2 -d || fail 15
# Verify the devices were removed
stat /dev/${FULL_NAME1} &>/dev/null && fail 16
stat /dev/${FULL_NAME2} &>/dev/null && fail 17
${ZFS_SH} -u || fail 18
pass
}
zconfig_test4
exit 0