*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
+ * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
*/
/* Portions Copyright 2010 Robert Milkowski */
#include <sys/types.h>
#include <sys/param.h>
-#include <sys/systm.h>
#include <sys/sysmacros.h>
#include <sys/kmem.h>
#include <sys/pathname.h>
#include <sys/vnode.h>
#include <sys/vfs.h>
-#include <sys/vfs_opreg.h>
#include <sys/mntent.h>
-#include <sys/mount.h>
#include <sys/cmn_err.h>
-#include "fs/fs_subr.h"
#include <sys/zfs_znode.h>
#include <sys/zfs_vnops.h>
#include <sys/zfs_dir.h>
#include <sys/zap.h>
#include <sys/sa.h>
#include <sys/sa_impl.h>
-#include <sys/varargs.h>
#include <sys/policy.h>
#include <sys/atomic.h>
-#include <sys/mkdev.h>
-#include <sys/modctl.h>
-#include <sys/refstr.h>
#include <sys/zfs_ioctl.h>
#include <sys/zfs_ctldir.h>
#include <sys/zfs_fuid.h>
-#include <sys/bootconf.h>
#include <sys/sunddi.h>
-#include <sys/dnlc.h>
#include <sys/dmu_objset.h>
#include <sys/spa_boot.h>
#include <sys/zpl.h>
+#include <linux/vfs_compat.h>
#include "zfs_comutil.h"
enum {
boolean_t
zfs_is_readonly(zfsvfs_t *zfsvfs)
{
- return (!!(zfsvfs->z_sb->s_flags & MS_RDONLY));
+ return (!!(zfsvfs->z_sb->s_flags & SB_RDONLY));
}
/*ARGSUSED*/
{
zfsvfs_t *zfsvfs = sb->s_fs_info;
- /*
- * Data integrity is job one. We don't want a compromised kernel
- * writing to the storage pool, so we never sync during panic.
- */
- if (unlikely(oops_in_progress))
- return (0);
-
/*
* Semantically, the only requirement is that the sync be initiated.
* The DMU syncs out txgs frequently, so there's nothing to do.
switch (newval) {
case ZFS_ACLTYPE_OFF:
zfsvfs->z_acl_type = ZFS_ACLTYPE_OFF;
- zfsvfs->z_sb->s_flags &= ~MS_POSIXACL;
+ zfsvfs->z_sb->s_flags &= ~SB_POSIXACL;
break;
case ZFS_ACLTYPE_POSIXACL:
#ifdef CONFIG_FS_POSIX_ACL
zfsvfs->z_acl_type = ZFS_ACLTYPE_POSIXACL;
- zfsvfs->z_sb->s_flags |= MS_POSIXACL;
+ zfsvfs->z_sb->s_flags |= SB_POSIXACL;
#else
zfsvfs->z_acl_type = ZFS_ACLTYPE_OFF;
- zfsvfs->z_sb->s_flags &= ~MS_POSIXACL;
+ zfsvfs->z_sb->s_flags &= ~SB_POSIXACL;
#endif /* CONFIG_FS_POSIX_ACL */
break;
default:
return;
if (newval)
- sb->s_flags |= MS_RDONLY;
+ sb->s_flags |= SB_RDONLY;
else
- sb->s_flags &= ~MS_RDONLY;
+ sb->s_flags &= ~SB_RDONLY;
}
static void
return;
if (newval == TRUE)
- sb->s_flags |= MS_MANDLOCK;
+ sb->s_flags |= SB_MANDLOCK;
else
- sb->s_flags &= ~MS_MANDLOCK;
+ sb->s_flags &= ~SB_MANDLOCK;
}
static void
zfsvfs->z_xattr_sa = B_TRUE;
}
- error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END,
- &zfsvfs->z_attr_table);
- if (error != 0)
- return (error);
-
- if (zfsvfs->z_version >= ZPL_VERSION_SA)
- sa_register_update_callback(os, zfs_sa_upgrade);
-
error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1,
&zfsvfs->z_root);
if (error != 0)
else if (error != 0)
return (error);
+ error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END,
+ &zfsvfs->z_attr_table);
+ if (error != 0)
+ return (error);
+
+ if (zfsvfs->z_version >= ZPL_VERSION_SA)
+ sa_register_update_callback(os, zfs_sa_upgrade);
+
return (0);
}
int
-zfsvfs_create(const char *osname, zfsvfs_t **zfvp)
+zfsvfs_create(const char *osname, boolean_t readonly, zfsvfs_t **zfvp)
{
objset_t *os;
zfsvfs_t *zfsvfs;
int error;
+ boolean_t ro = (readonly || (strchr(osname, '@') != NULL));
zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP);
- /*
- * 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, B_TRUE,
- zfsvfs, &os);
+ error = dmu_objset_own(osname, DMU_OST_ZFS, ro, B_TRUE, zfsvfs, &os);
if (error != 0) {
kmem_free(zfsvfs, sizeof (zfsvfs_t));
return (error);
return (error);
}
+
+/*
+ * Note: zfsvfs is assumed to be malloc'd, and will be freed by this function
+ * on a failure. Do not pass in a statically allocated zfsvfs.
+ */
int
zfsvfs_create_impl(zfsvfs_t **zfvp, zfsvfs_t *zfsvfs, objset_t *os)
{
error = zfsvfs_init(zfsvfs, os);
if (error != 0) {
*zfvp = NULL;
- kmem_free(zfsvfs, sizeof (zfsvfs_t));
+ zfsvfs_free(zfsvfs);
return (error);
}
+ zfsvfs->z_drain_task = TASKQID_INVALID;
+ zfsvfs->z_draining = B_FALSE;
+ zfsvfs->z_drain_cancel = B_TRUE;
+
*zfvp = zfsvfs;
return (0);
}
int error;
boolean_t readonly = zfs_is_readonly(zfsvfs);
- /*
- * Check for a bad on-disk format version now since we
- * lied about owning the dataset readonly before.
- */
- if (!readonly &&
- dmu_objset_incompatible_encryption_version(zfsvfs->z_os))
- return (SET_ERROR(EROFS));
-
error = zfs_register_callbacks(zfsvfs->z_vfs);
if (error)
return (error);
* operations out since we closed the ZIL.
*/
if (mounting) {
+ ASSERT3P(zfsvfs->z_kstat.dk_kstats, ==, NULL);
+ dataset_kstats_create(&zfsvfs->z_kstat, zfsvfs->z_os);
+
/*
* During replay we remove the read only flag to
* allow replays to succeed.
*/
- if (readonly != 0)
+ if (readonly != 0) {
readonly_changed_cb(zfsvfs, B_FALSE);
- else
+ } else {
+ zap_stats_t zs;
+ if (zap_get_stats(zfsvfs->z_os, zfsvfs->z_unlinkedobj,
+ &zs) == 0) {
+ dataset_kstats_update_nunlinks_kstat(
+ &zfsvfs->z_kstat, zs.zs_num_entries);
+ }
+ dprintf_ds(zfsvfs->z_os->os_dsl_dataset,
+ "num_entries in unlinked set: %llu",
+ zs.zs_num_entries);
zfs_unlinked_drain(zfsvfs);
+ }
/*
* Parse and replay the intent log.
vmem_free(zfsvfs->z_hold_trees, sizeof (avl_tree_t) * size);
vmem_free(zfsvfs->z_hold_locks, sizeof (kmutex_t) * size);
zfsvfs_vfs_free(zfsvfs->z_vfs);
+ dataset_kstats_destroy(&zfsvfs->z_kstat);
kmem_free(zfsvfs, sizeof (zfsvfs_t));
}
{
zfsvfs_t *zfsvfs = dentry->d_sb->s_fs_info;
uint64_t refdbytes, availbytes, usedobjs, availobjs;
- uint64_t fsid;
- uint32_t bshift;
int err = 0;
ZFS_ENTER(zfsvfs);
dmu_objset_space(zfsvfs->z_os,
&refdbytes, &availbytes, &usedobjs, &availobjs);
- fsid = dmu_objset_fsid_guid(zfsvfs->z_os);
+ uint64_t fsid = dmu_objset_fsid_guid(zfsvfs->z_os);
/*
* The underlying storage pool actually uses multiple block
* size. Under Solaris frsize (fragment size) is reported as
*/
statp->f_frsize = zfsvfs->z_max_blksz;
statp->f_bsize = zfsvfs->z_max_blksz;
- bshift = fls(statp->f_bsize) - 1;
+ uint32_t bshift = fls(statp->f_bsize) - 1;
/*
* The following report "total" blocks of various kinds in
* "preferred" size.
*/
+ /* Round up so we never have a filesytem using 0 blocks. */
+ refdbytes = P2ROUNDUP(refdbytes, statp->f_bsize);
statp->f_blocks = (refdbytes + availbytes) >> bshift;
statp->f_bfree = availbytes >> bshift;
statp->f_bavail = statp->f_bfree; /* no root reservation */
* static metadata. ZFS doesn't preallocate files, so the best
* we can do is report the max that could possibly fit in f_files,
* and that minus the number actually used in f_ffree.
- * For f_ffree, report the smaller of the number of object available
+ * For f_ffree, report the smaller of the number of objects available
* and the number of blocks (each object will take at least a block).
*/
statp->f_ffree = MIN(availobjs, availbytes >> DNODE_SHIFT);
{
znode_t *zp;
+ zfs_unlinked_drain_stop_wait(zfsvfs);
+
/*
* If someone has not already unmounted this file system,
* drain the iput_taskq to ensure all active references to the
zfs_unregister_callbacks(zfsvfs);
/*
- * Evict cached data
+ * Evict cached data. We must write out any dirty data before
+ * disowning the dataset.
*/
- if (dsl_dataset_is_dirty(dmu_objset_ds(zfsvfs->z_os)) &&
- !zfs_is_readonly(zfsvfs))
+ if (!zfs_is_readonly(zfsvfs))
txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0);
dmu_objset_evict_dbufs(zfsvfs->z_os);
struct inode *root_inode;
uint64_t recordsize;
int error = 0;
- zfsvfs_t *zfsvfs;
+ zfsvfs_t *zfsvfs = NULL;
+ vfs_t *vfs = NULL;
ASSERT(zm);
ASSERT(osname);
- error = zfsvfs_create(osname, &zfsvfs);
+ error = zfsvfs_parse_options(zm->mnt_data, &vfs);
if (error)
return (error);
- error = zfsvfs_parse_options(zm->mnt_data, &zfsvfs->z_vfs);
- if (error)
+ error = zfsvfs_create(osname, vfs->vfs_readonly, &zfsvfs);
+ if (error) {
+ zfsvfs_vfs_free(vfs);
goto out;
+ }
if ((error = dsl_prop_get_integer(osname, "recordsize",
- &recordsize, NULL)))
+ &recordsize, NULL))) {
+ zfsvfs_vfs_free(vfs);
goto out;
+ }
- zfsvfs->z_vfs->vfs_data = zfsvfs;
+ vfs->vfs_data = zfsvfs;
+ zfsvfs->z_vfs = vfs;
zfsvfs->z_sb = sb;
sb->s_fs_info = zfsvfs;
sb->s_magic = ZFS_SUPER_MAGIC;
zfsvfs->z_arc_prune = arc_add_prune_callback(zpl_prune_sb, sb);
out:
if (error) {
- dmu_objset_disown(zfsvfs->z_os, B_TRUE, zfsvfs);
- zfsvfs_free(zfsvfs);
+ if (zfsvfs != NULL) {
+ dmu_objset_disown(zfsvfs->z_os, B_TRUE, zfsvfs);
+ zfsvfs_free(zfsvfs);
+ }
/*
* make sure we don't have dangling sb->s_fs_info which
* zfs_preumount will use.
/* zfsvfs is NULL when zfs_domount fails during mount */
if (zfsvfs) {
+ zfs_unlinked_drain_stop_wait(zfsvfs);
zfsctl_destroy(sb->s_fs_info);
/*
* Wait for iput_async before entering evict_inodes in
int error;
if ((issnap || !spa_writeable(dmu_objset_spa(zfsvfs->z_os))) &&
- !(*flags & MS_RDONLY)) {
- *flags |= MS_RDONLY;
+ !(*flags & SB_RDONLY)) {
+ *flags |= SB_RDONLY;
return (EROFS);
}
if (error)
return (error);
+ if (!zfs_is_readonly(zfsvfs) && (*flags & SB_RDONLY))
+ txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0);
+
zfs_unregister_callbacks(zfsvfs);
zfsvfs_vfs_free(zfsvfs->z_vfs);
}
mutex_exit(&zfsvfs->z_znodes_lock);
+ if (!zfs_is_readonly(zfsvfs) && !zfsvfs->z_unmounted) {
+ /*
+ * zfs_suspend_fs() could have interrupted freeing
+ * of dnodes. We need to restart this freeing so
+ * that we don't "leak" the space.
+ */
+ zfs_unlinked_drain(zfsvfs);
+ }
+
bail:
/* release the VFS ops */
rw_exit(&zfsvfs->z_teardown_inactive_lock);
dmu_tx_commit(tx);
zfsvfs->z_version = newvers;
+ os->os_version = newvers;
zfs_set_fuid_feature(zfsvfs);
int
zfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value)
{
- const char *pname;
- int error = SET_ERROR(ENOENT);
+ uint64_t *cached_copy = NULL;
/*
- * Look up the file system's value for the property. For the
- * version property, we look up a slightly different string.
+ * Figure out where in the objset_t the cached copy would live, if it
+ * is available for the requested property.
*/
+ if (os != NULL) {
+ switch (prop) {
+ case ZFS_PROP_VERSION:
+ cached_copy = &os->os_version;
+ break;
+ case ZFS_PROP_NORMALIZE:
+ cached_copy = &os->os_normalization;
+ break;
+ case ZFS_PROP_UTF8ONLY:
+ cached_copy = &os->os_utf8only;
+ break;
+ case ZFS_PROP_CASE:
+ cached_copy = &os->os_casesensitivity;
+ break;
+ default:
+ break;
+ }
+ }
+ if (cached_copy != NULL && *cached_copy != OBJSET_PROP_UNINITIALIZED) {
+ *value = *cached_copy;
+ return (0);
+ }
+
+ /*
+ * If the property wasn't cached, look up the file system's value for
+ * the property. For the version property, we look up a slightly
+ * different string.
+ */
+ const char *pname;
+ int error = ENOENT;
if (prop == ZFS_PROP_VERSION)
pname = ZPL_VERSION_STR;
else
}
error = 0;
}
+
+ /*
+ * If one of the methods for getting the property value above worked,
+ * copy it into the objset_t's cache.
+ */
+ if (error == 0 && cached_copy != NULL) {
+ *cached_copy = *value;
+ }
+
return (error);
}
zfsctl_fini();
}
-#if defined(_KERNEL) && defined(HAVE_SPL)
+#if defined(_KERNEL)
EXPORT_SYMBOL(zfs_suspend_fs);
EXPORT_SYMBOL(zfs_resume_fs);
EXPORT_SYMBOL(zfs_userspace_one);
projects / mirror_zfs.git / blobdiff