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OpenZFS 8115 - parallel zfs mount
Porting Notes: * Use thread pools (tpool) API instead of introducing taskq interfaces to libzfs. * Use pthread_mutext for locks as mutex_t isn't available. * Ignore alternative libshare initialization since OpenZFS-7955 is not present on zfsonlinux. Authored by: Sebastien Roy <seb@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com> Reviewed by: Brad Lewis <brad.lewis@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Paul Dagnelie <pcd@delphix.com> Reviewed by: Prashanth Sreenivasa <pks@delphix.com> Authored by: Brian Behlendorf <behlendorf1@llnl.gov> Approved by: Matt Ahrens <mahrens@delphix.com> Ported-by: Don Brady <don.brady@delphix.com> OpenZFS-issue: https://www.illumos.org/issues/8115 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/a3f0e2b569 Closes #8092
This commit is contained in:
Sebastien Roy
Brian Behlendorf
parent
af2e8411da
commit
a10d50f999
@ -6059,7 +6059,12 @@ zfs_do_holds(int argc, char **argv)
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#define CHECK_SPINNER 30
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#define SPINNER_TIME 3 /* seconds */
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#define MOUNT_TIME 5 /* seconds */
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#define MOUNT_TIME 1 /* seconds */
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typedef struct get_all_state {
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boolean_t ga_verbose;
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get_all_cb_t *ga_cbp;
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} get_all_state_t;
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static int
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get_one_dataset(zfs_handle_t *zhp, void *data)
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@ -6068,10 +6073,10 @@ get_one_dataset(zfs_handle_t *zhp, void *data)
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static int spinval = 0;
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static int spincheck = 0;
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static time_t last_spin_time = (time_t)0;
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get_all_cb_t *cbp = data;
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get_all_state_t *state = data;
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zfs_type_t type = zfs_get_type(zhp);
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if (cbp->cb_verbose) {
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if (state->ga_verbose) {
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if (--spincheck < 0) {
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time_t now = time(NULL);
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if (last_spin_time + SPINNER_TIME < now) {
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@ -6097,25 +6102,23 @@ get_one_dataset(zfs_handle_t *zhp, void *data)
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zfs_close(zhp);
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return (0);
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}
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libzfs_add_handle(cbp, zhp);
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assert(cbp->cb_used <= cbp->cb_alloc);
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libzfs_add_handle(state->ga_cbp, zhp);
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assert(state->ga_cbp->cb_used <= state->ga_cbp->cb_alloc);
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return (0);
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}
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static void
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get_all_datasets(zfs_handle_t ***dslist, size_t *count, boolean_t verbose)
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get_all_datasets(get_all_cb_t *cbp, boolean_t verbose)
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{
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get_all_cb_t cb = { 0 };
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cb.cb_verbose = verbose;
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cb.cb_getone = get_one_dataset;
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get_all_state_t state = {
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.ga_verbose = verbose,
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.ga_cbp = cbp
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};
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if (verbose)
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set_progress_header(gettext("Reading ZFS config"));
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(void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
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*dslist = cb.cb_handles;
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*count = cb.cb_used;
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(void) zfs_iter_root(g_zfs, get_one_dataset, &state);
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if (verbose)
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finish_progress(gettext("done."));
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@ -6126,8 +6129,19 @@ get_all_datasets(zfs_handle_t ***dslist, size_t *count, boolean_t verbose)
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* similar, we have a common function with an extra parameter to determine which
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* mode we are using.
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*/
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#define OP_SHARE 0x1
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#define OP_MOUNT 0x2
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typedef enum { OP_SHARE, OP_MOUNT } share_mount_op_t;
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typedef struct share_mount_state {
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share_mount_op_t sm_op;
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boolean_t sm_verbose;
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int sm_flags;
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char *sm_options;
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char *sm_proto; /* only valid for OP_SHARE */
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pthread_mutex_t sm_lock; /* protects the remaining fields */
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uint_t sm_total; /* number of filesystems to process */
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uint_t sm_done; /* number of filesystems processed */
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int sm_status; /* -1 if any of the share/mount operations failed */
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} share_mount_state_t;
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/*
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* Share or mount a dataset.
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@ -6385,6 +6399,29 @@ report_mount_progress(int current, int total)
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update_progress(info);
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}
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/*
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* zfs_foreach_mountpoint() callback that mounts or shares one filesystem and
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* updates the progress meter.
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*/
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static int
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share_mount_one_cb(zfs_handle_t *zhp, void *arg)
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{
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share_mount_state_t *sms = arg;
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int ret;
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ret = share_mount_one(zhp, sms->sm_op, sms->sm_flags, sms->sm_proto,
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B_FALSE, sms->sm_options);
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pthread_mutex_lock(&sms->sm_lock);
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if (ret != 0)
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sms->sm_status = ret;
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sms->sm_done++;
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if (sms->sm_verbose)
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report_mount_progress(sms->sm_done, sms->sm_total);
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pthread_mutex_unlock(&sms->sm_lock);
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return (ret);
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}
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static void
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append_options(char *mntopts, char *newopts)
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{
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@ -6459,8 +6496,6 @@ share_mount(int op, int argc, char **argv)
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/* check number of arguments */
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if (do_all) {
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zfs_handle_t **dslist = NULL;
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size_t i, count = 0;
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char *protocol = NULL;
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if (op == OP_SHARE && argc > 0) {
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@ -6481,27 +6516,35 @@ share_mount(int op, int argc, char **argv)
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}
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start_progress_timer();
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get_all_datasets(&dslist, &count, verbose);
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get_all_cb_t cb = { 0 };
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get_all_datasets(&cb, verbose);
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if (count == 0) {
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if (cb.cb_used == 0) {
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if (options != NULL)
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free(options);
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return (0);
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}
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qsort(dslist, count, sizeof (void *), libzfs_dataset_cmp);
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share_mount_state_t share_mount_state = { 0 };
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share_mount_state.sm_op = op;
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share_mount_state.sm_verbose = verbose;
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share_mount_state.sm_flags = flags;
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share_mount_state.sm_options = options;
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share_mount_state.sm_proto = protocol;
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share_mount_state.sm_total = cb.cb_used;
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pthread_mutex_init(&share_mount_state.sm_lock, NULL);
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for (i = 0; i < count; i++) {
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if (verbose)
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report_mount_progress(i, count);
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/*
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* libshare isn't mt-safe, so only do the operation in parallel
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* if we're mounting.
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*/
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zfs_foreach_mountpoint(g_zfs, cb.cb_handles, cb.cb_used,
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share_mount_one_cb, &share_mount_state, op == OP_MOUNT);
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ret = share_mount_state.sm_status;
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if (share_mount_one(dslist[i], op, flags, protocol,
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B_FALSE, options) != 0)
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ret = 1;
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zfs_close(dslist[i]);
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}
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free(dslist);
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for (int i = 0; i < cb.cb_used; i++)
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zfs_close(cb.cb_handles[i]);
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free(cb.cb_handles);
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} else if (argc == 0) {
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struct mnttab entry;
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@ -573,12 +573,11 @@ typedef struct get_all_cb {
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zfs_handle_t **cb_handles;
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size_t cb_alloc;
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size_t cb_used;
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boolean_t cb_verbose;
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int (*cb_getone)(zfs_handle_t *, void *);
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} get_all_cb_t;
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void zfs_foreach_mountpoint(libzfs_handle_t *, zfs_handle_t **, size_t,
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zfs_iter_f, void *, boolean_t);
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void libzfs_add_handle(get_all_cb_t *, zfs_handle_t *);
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int libzfs_dataset_cmp(const void *, const void *);
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/*
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* Functions to create and destroy datasets.
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@ -21,7 +21,7 @@
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
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* Copyright (c) 2011, 2017 by Delphix. All rights reserved.
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* Copyright (c) 2018 Datto Inc.
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*/
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@ -60,6 +60,13 @@ struct libzfs_handle {
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void *libzfs_sharehdl; /* libshare handle */
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uint_t libzfs_shareflags;
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boolean_t libzfs_mnttab_enable;
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/*
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* We need a lock to handle the case where parallel mount
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* threads are populating the mnttab cache simultaneously. The
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* lock only protects the integrity of the avl tree, and does
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* not protect the contents of the mnttab entries themselves.
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*/
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pthread_mutex_t libzfs_mnttab_cache_lock;
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avl_tree_t libzfs_mnttab_cache;
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int libzfs_pool_iter;
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char libzfs_chassis_id[256];
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@ -791,6 +791,7 @@ libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
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void
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libzfs_mnttab_init(libzfs_handle_t *hdl)
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{
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pthread_mutex_init(&hdl->libzfs_mnttab_cache_lock, NULL);
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assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
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avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
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sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
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@ -849,6 +850,7 @@ libzfs_mnttab_fini(libzfs_handle_t *hdl)
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free(mtn);
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}
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avl_destroy(&hdl->libzfs_mnttab_cache);
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(void) pthread_mutex_destroy(&hdl->libzfs_mnttab_cache_lock);
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}
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void
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@ -863,7 +865,7 @@ libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
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{
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mnttab_node_t find;
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mnttab_node_t *mtn;
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int error;
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int ret = ENOENT;
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if (!hdl->libzfs_mnttab_enable) {
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struct mnttab srch = { 0 };
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@ -883,17 +885,24 @@ libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
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return (ENOENT);
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}
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if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
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if ((error = libzfs_mnttab_update(hdl)) != 0)
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pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
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if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) {
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int error;
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if ((error = libzfs_mnttab_update(hdl)) != 0) {
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pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
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return (error);
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}
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}
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find.mtn_mt.mnt_special = (char *)fsname;
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mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
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if (mtn) {
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*entry = mtn->mtn_mt;
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return (0);
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ret = 0;
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}
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return (ENOENT);
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pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
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return (ret);
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}
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void
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@ -902,15 +911,24 @@ libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
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{
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mnttab_node_t *mtn;
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if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
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return;
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pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
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if (avl_numnodes(&hdl->libzfs_mnttab_cache) != 0) {
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mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
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mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
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mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
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mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
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mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
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/*
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* Another thread may have already added this entry
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* via libzfs_mnttab_update. If so we should skip it.
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*/
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if (avl_find(&hdl->libzfs_mnttab_cache, mtn, NULL) != NULL)
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free(mtn);
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else
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avl_add(&hdl->libzfs_mnttab_cache, mtn);
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}
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pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
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}
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void
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libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
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@ -918,6 +936,7 @@ libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
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mnttab_node_t find;
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mnttab_node_t *ret;
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pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
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find.mtn_mt.mnt_special = (char *)fsname;
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if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))
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!= NULL) {
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@ -928,6 +947,7 @@ libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
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free(ret->mtn_mt.mnt_mntopts);
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free(ret);
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}
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pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
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}
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int
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@ -22,7 +22,7 @@
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/*
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* Copyright 2015 Nexenta Systems, Inc. All rights reserved.
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2014, 2015 by Delphix. All rights reserved.
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* Copyright (c) 2014, 2017 by Delphix. All rights reserved.
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* Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
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* Copyright 2017 RackTop Systems.
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* Copyright (c) 2018 Datto Inc.
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@ -84,11 +84,15 @@
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#include <libzfs.h>
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#include "libzfs_impl.h"
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#include <thread_pool.h>
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#include <libshare.h>
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#include <sys/systeminfo.h>
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#define MAXISALEN 257 /* based on sysinfo(2) man page */
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static int mount_tp_nthr = 512; /* tpool threads for multi-threaded mounting */
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static void zfs_mount_task(void *);
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static int zfs_share_proto(zfs_handle_t *, zfs_share_proto_t *);
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zfs_share_type_t zfs_is_shared_proto(zfs_handle_t *, char **,
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zfs_share_proto_t);
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@ -1146,25 +1150,32 @@ remove_mountpoint(zfs_handle_t *zhp)
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}
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}
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/*
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* Add the given zfs handle to the cb_handles array, dynamically reallocating
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* the array if it is out of space.
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*/
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void
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libzfs_add_handle(get_all_cb_t *cbp, zfs_handle_t *zhp)
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{
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if (cbp->cb_alloc == cbp->cb_used) {
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size_t newsz;
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void *ptr;
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zfs_handle_t **newhandles;
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newsz = cbp->cb_alloc ? cbp->cb_alloc * 2 : 64;
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ptr = zfs_realloc(zhp->zfs_hdl,
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cbp->cb_handles, cbp->cb_alloc * sizeof (void *),
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newsz * sizeof (void *));
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cbp->cb_handles = ptr;
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newsz = cbp->cb_alloc != 0 ? cbp->cb_alloc * 2 : 64;
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newhandles = zfs_realloc(zhp->zfs_hdl,
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cbp->cb_handles, cbp->cb_alloc * sizeof (zfs_handle_t *),
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newsz * sizeof (zfs_handle_t *));
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cbp->cb_handles = newhandles;
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cbp->cb_alloc = newsz;
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}
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cbp->cb_handles[cbp->cb_used++] = zhp;
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}
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/*
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* Recursive helper function used during file system enumeration
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*/
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static int
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mount_cb(zfs_handle_t *zhp, void *data)
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zfs_iter_cb(zfs_handle_t *zhp, void *data)
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{
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get_all_cb_t *cbp = data;
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@ -1196,112 +1207,351 @@ mount_cb(zfs_handle_t *zhp, void *data)
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}
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libzfs_add_handle(cbp, zhp);
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if (zfs_iter_filesystems(zhp, mount_cb, cbp) != 0) {
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if (zfs_iter_filesystems(zhp, zfs_iter_cb, cbp) != 0) {
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zfs_close(zhp);
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return (-1);
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}
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return (0);
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}
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/*
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* Sort comparator that compares two mountpoint paths. We sort these paths so
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* that subdirectories immediately follow their parents. This means that we
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* effectively treat the '/' character as the lowest value non-nul char. An
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* example sorted list using this comparator would look like:
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*
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* /foo
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* /foo/bar
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* /foo/bar/baz
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* /foo/baz
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* /foo.bar
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*
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* The mounting code depends on this ordering to deterministically iterate
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* over filesystems in order to spawn parallel mount tasks.
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*/
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int
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libzfs_dataset_cmp(const void *a, const void *b)
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mountpoint_cmp(const void *arga, const void *argb)
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{
|
||||
zfs_handle_t **za = (zfs_handle_t **)a;
|
||||
zfs_handle_t **zb = (zfs_handle_t **)b;
|
||||
zfs_handle_t *const *zap = arga;
|
||||
zfs_handle_t *za = *zap;
|
||||
zfs_handle_t *const *zbp = argb;
|
||||
zfs_handle_t *zb = *zbp;
|
||||
char mounta[MAXPATHLEN];
|
||||
char mountb[MAXPATHLEN];
|
||||
const char *a = mounta;
|
||||
const char *b = mountb;
|
||||
boolean_t gota, gotb;
|
||||
|
||||
if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
|
||||
verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
|
||||
gota = (zfs_get_type(za) == ZFS_TYPE_FILESYSTEM);
|
||||
if (gota) {
|
||||
verify(zfs_prop_get(za, ZFS_PROP_MOUNTPOINT, mounta,
|
||||
sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
|
||||
if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
|
||||
verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
|
||||
}
|
||||
gotb = (zfs_get_type(zb) == ZFS_TYPE_FILESYSTEM);
|
||||
if (gotb) {
|
||||
verify(zfs_prop_get(zb, ZFS_PROP_MOUNTPOINT, mountb,
|
||||
sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
|
||||
}
|
||||
|
||||
if (gota && gotb)
|
||||
return (strcmp(mounta, mountb));
|
||||
if (gota && gotb) {
|
||||
while (*a != '\0' && (*a == *b)) {
|
||||
a++;
|
||||
b++;
|
||||
}
|
||||
if (*a == *b)
|
||||
return (0);
|
||||
if (*a == '\0')
|
||||
return (-1);
|
||||
if (*b == '\0')
|
||||
return (1);
|
||||
if (*a == '/')
|
||||
return (-1);
|
||||
if (*b == '/')
|
||||
return (1);
|
||||
return (*a < *b ? -1 : *a > *b);
|
||||
}
|
||||
|
||||
if (gota)
|
||||
return (-1);
|
||||
if (gotb)
|
||||
return (1);
|
||||
|
||||
return (strcmp(zfs_get_name(*za), zfs_get_name(*zb)));
|
||||
/*
|
||||
* If neither filesystem has a mountpoint, revert to sorting by
|
||||
* dataset name.
|
||||
*/
|
||||
return (strcmp(zfs_get_name(za), zfs_get_name(zb)));
|
||||
}
|
||||
|
||||
/*
|
||||
* Return true if path2 is a child of path1.
|
||||
*/
|
||||
static boolean_t
|
||||
libzfs_path_contains(const char *path1, const char *path2)
|
||||
{
|
||||
return (strstr(path2, path1) == path2 && path2[strlen(path1)] == '/');
|
||||
}
|
||||
|
||||
/*
|
||||
* Given a mountpoint specified by idx in the handles array, find the first
|
||||
* non-descendent of that mountpoint and return its index. Descendant paths
|
||||
* start with the parent's path. This function relies on the ordering
|
||||
* enforced by mountpoint_cmp().
|
||||
*/
|
||||
static int
|
||||
non_descendant_idx(zfs_handle_t **handles, size_t num_handles, int idx)
|
||||
{
|
||||
char parent[ZFS_MAXPROPLEN];
|
||||
char child[ZFS_MAXPROPLEN];
|
||||
int i;
|
||||
|
||||
verify(zfs_prop_get(handles[idx], ZFS_PROP_MOUNTPOINT, parent,
|
||||
sizeof (parent), NULL, NULL, 0, B_FALSE) == 0);
|
||||
|
||||
for (i = idx + 1; i < num_handles; i++) {
|
||||
verify(zfs_prop_get(handles[i], ZFS_PROP_MOUNTPOINT, child,
|
||||
sizeof (child), NULL, NULL, 0, B_FALSE) == 0);
|
||||
if (!libzfs_path_contains(parent, child))
|
||||
break;
|
||||
}
|
||||
return (i);
|
||||
}
|
||||
|
||||
typedef struct mnt_param {
|
||||
libzfs_handle_t *mnt_hdl;
|
||||
tpool_t *mnt_tp;
|
||||
zfs_handle_t **mnt_zhps; /* filesystems to mount */
|
||||
size_t mnt_num_handles;
|
||||
int mnt_idx; /* Index of selected entry to mount */
|
||||
zfs_iter_f mnt_func;
|
||||
void *mnt_data;
|
||||
} mnt_param_t;
|
||||
|
||||
/*
|
||||
* Allocate and populate the parameter struct for mount function, and
|
||||
* schedule mounting of the entry selected by idx.
|
||||
*/
|
||||
static void
|
||||
zfs_dispatch_mount(libzfs_handle_t *hdl, zfs_handle_t **handles,
|
||||
size_t num_handles, int idx, zfs_iter_f func, void *data, tpool_t *tp)
|
||||
{
|
||||
mnt_param_t *mnt_param = zfs_alloc(hdl, sizeof (mnt_param_t));
|
||||
|
||||
mnt_param->mnt_hdl = hdl;
|
||||
mnt_param->mnt_tp = tp;
|
||||
mnt_param->mnt_zhps = handles;
|
||||
mnt_param->mnt_num_handles = num_handles;
|
||||
mnt_param->mnt_idx = idx;
|
||||
mnt_param->mnt_func = func;
|
||||
mnt_param->mnt_data = data;
|
||||
|
||||
(void) tpool_dispatch(tp, zfs_mount_task, (void*)mnt_param);
|
||||
}
|
||||
|
||||
/*
|
||||
* This is the structure used to keep state of mounting or sharing operations
|
||||
* during a call to zpool_enable_datasets().
|
||||
*/
|
||||
typedef struct mount_state {
|
||||
/*
|
||||
* ms_mntstatus is set to -1 if any mount fails. While multiple threads
|
||||
* could update this variable concurrently, no synchronization is
|
||||
* needed as it's only ever set to -1.
|
||||
*/
|
||||
int ms_mntstatus;
|
||||
int ms_mntflags;
|
||||
const char *ms_mntopts;
|
||||
} mount_state_t;
|
||||
|
||||
static int
|
||||
zfs_mount_one(zfs_handle_t *zhp, void *arg)
|
||||
{
|
||||
mount_state_t *ms = arg;
|
||||
int ret = 0;
|
||||
|
||||
/*
|
||||
* don't attempt to mount encrypted datasets with
|
||||
* unloaded keys
|
||||
*/
|
||||
if (zfs_prop_get_int(zhp, ZFS_PROP_KEYSTATUS) ==
|
||||
ZFS_KEYSTATUS_UNAVAILABLE)
|
||||
return (0);
|
||||
|
||||
if (zfs_mount(zhp, ms->ms_mntopts, ms->ms_mntflags) != 0)
|
||||
ret = ms->ms_mntstatus = -1;
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static int
|
||||
zfs_share_one(zfs_handle_t *zhp, void *arg)
|
||||
{
|
||||
mount_state_t *ms = arg;
|
||||
int ret = 0;
|
||||
|
||||
if (zfs_share(zhp) != 0)
|
||||
ret = ms->ms_mntstatus = -1;
|
||||
return (ret);
|
||||
}
|
||||
|
||||
/*
|
||||
* Thread pool function to mount one file system. On completion, it finds and
|
||||
* schedules its children to be mounted. This depends on the sorting done in
|
||||
* zfs_foreach_mountpoint(). Note that the degenerate case (chain of entries
|
||||
* each descending from the previous) will have no parallelism since we always
|
||||
* have to wait for the parent to finish mounting before we can schedule
|
||||
* its children.
|
||||
*/
|
||||
static void
|
||||
zfs_mount_task(void *arg)
|
||||
{
|
||||
mnt_param_t *mp = arg;
|
||||
int idx = mp->mnt_idx;
|
||||
zfs_handle_t **handles = mp->mnt_zhps;
|
||||
size_t num_handles = mp->mnt_num_handles;
|
||||
char mountpoint[ZFS_MAXPROPLEN];
|
||||
|
||||
verify(zfs_prop_get(handles[idx], ZFS_PROP_MOUNTPOINT, mountpoint,
|
||||
sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
|
||||
|
||||
if (mp->mnt_func(handles[idx], mp->mnt_data) != 0)
|
||||
return;
|
||||
|
||||
/*
|
||||
* We dispatch tasks to mount filesystems with mountpoints underneath
|
||||
* this one. We do this by dispatching the next filesystem with a
|
||||
* descendant mountpoint of the one we just mounted, then skip all of
|
||||
* its descendants, dispatch the next descendant mountpoint, and so on.
|
||||
* The non_descendant_idx() function skips over filesystems that are
|
||||
* descendants of the filesystem we just dispatched.
|
||||
*/
|
||||
for (int i = idx + 1; i < num_handles;
|
||||
i = non_descendant_idx(handles, num_handles, i)) {
|
||||
char child[ZFS_MAXPROPLEN];
|
||||
verify(zfs_prop_get(handles[i], ZFS_PROP_MOUNTPOINT,
|
||||
child, sizeof (child), NULL, NULL, 0, B_FALSE) == 0);
|
||||
|
||||
if (!libzfs_path_contains(mountpoint, child))
|
||||
break; /* not a descendant, return */
|
||||
zfs_dispatch_mount(mp->mnt_hdl, handles, num_handles, i,
|
||||
mp->mnt_func, mp->mnt_data, mp->mnt_tp);
|
||||
}
|
||||
free(mp);
|
||||
}
|
||||
|
||||
/*
|
||||
* Issue the func callback for each ZFS handle contained in the handles
|
||||
* array. This function is used to mount all datasets, and so this function
|
||||
* guarantees that filesystems for parent mountpoints are called before their
|
||||
* children. As such, before issuing any callbacks, we first sort the array
|
||||
* of handles by mountpoint.
|
||||
*
|
||||
* Callbacks are issued in one of two ways:
|
||||
*
|
||||
* 1. Sequentially: If the parallel argument is B_FALSE or the ZFS_SERIAL_MOUNT
|
||||
* environment variable is set, then we issue callbacks sequentially.
|
||||
*
|
||||
* 2. In parallel: If the parallel argument is B_TRUE and the ZFS_SERIAL_MOUNT
|
||||
* environment variable is not set, then we use a tpool to dispatch threads
|
||||
* to mount filesystems in parallel. This function dispatches tasks to mount
|
||||
* the filesystems at the top-level mountpoints, and these tasks in turn
|
||||
* are responsible for recursively mounting filesystems in their children
|
||||
* mountpoints.
|
||||
*/
|
||||
void
|
||||
zfs_foreach_mountpoint(libzfs_handle_t *hdl, zfs_handle_t **handles,
|
||||
size_t num_handles, zfs_iter_f func, void *data, boolean_t parallel)
|
||||
{
|
||||
/*
|
||||
* The ZFS_SERIAL_MOUNT environment variable is an undocumented
|
||||
* variable that can be used as a convenience to do a/b comparison
|
||||
* of serial vs. parallel mounting.
|
||||
*/
|
||||
boolean_t serial_mount = !parallel ||
|
||||
(getenv("ZFS_SERIAL_MOUNT") != NULL);
|
||||
|
||||
/*
|
||||
* Sort the datasets by mountpoint. See mountpoint_cmp for details
|
||||
* of how these are sorted.
|
||||
*/
|
||||
qsort(handles, num_handles, sizeof (zfs_handle_t *), mountpoint_cmp);
|
||||
|
||||
if (serial_mount) {
|
||||
for (int i = 0; i < num_handles; i++) {
|
||||
func(handles[i], data);
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* Issue the callback function for each dataset using a parallel
|
||||
* algorithm that uses a thread pool to manage threads.
|
||||
*/
|
||||
tpool_t *tp = tpool_create(1, mount_tp_nthr, 0, NULL);
|
||||
|
||||
/*
|
||||
* There may be multiple "top level" mountpoints outside of the pool's
|
||||
* root mountpoint, e.g.: /foo /bar. Dispatch a mount task for each of
|
||||
* these.
|
||||
*/
|
||||
for (int i = 0; i < num_handles;
|
||||
i = non_descendant_idx(handles, num_handles, i)) {
|
||||
zfs_dispatch_mount(hdl, handles, num_handles, i, func, data,
|
||||
tp);
|
||||
}
|
||||
|
||||
tpool_wait(tp); /* wait for all scheduled mounts to complete */
|
||||
tpool_destroy(tp);
|
||||
}
|
||||
|
||||
/*
|
||||
* Mount and share all datasets within the given pool. This assumes that no
|
||||
* datasets within the pool are currently mounted. Because users can create
|
||||
* complicated nested hierarchies of mountpoints, we first gather all the
|
||||
* datasets and mountpoints within the pool, and sort them by mountpoint. Once
|
||||
* we have the list of all filesystems, we iterate over them in order and mount
|
||||
* and/or share each one.
|
||||
* datasets within the pool are currently mounted.
|
||||
*/
|
||||
#pragma weak zpool_mount_datasets = zpool_enable_datasets
|
||||
int
|
||||
zpool_enable_datasets(zpool_handle_t *zhp, const char *mntopts, int flags)
|
||||
{
|
||||
get_all_cb_t cb = { 0 };
|
||||
libzfs_handle_t *hdl = zhp->zpool_hdl;
|
||||
mount_state_t ms = { 0 };
|
||||
zfs_handle_t *zfsp;
|
||||
int i, ret = -1;
|
||||
int *good;
|
||||
int ret = 0;
|
||||
|
||||
/*
|
||||
* Gather all non-snap datasets within the pool.
|
||||
*/
|
||||
if ((zfsp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_DATASET)) == NULL)
|
||||
if ((zfsp = zfs_open(zhp->zpool_hdl, zhp->zpool_name,
|
||||
ZFS_TYPE_DATASET)) == NULL)
|
||||
goto out;
|
||||
|
||||
/*
|
||||
* Gather all non-snapshot datasets within the pool. Start by adding
|
||||
* the root filesystem for this pool to the list, and then iterate
|
||||
* over all child filesystems.
|
||||
*/
|
||||
libzfs_add_handle(&cb, zfsp);
|
||||
if (zfs_iter_filesystems(zfsp, mount_cb, &cb) != 0)
|
||||
goto out;
|
||||
/*
|
||||
* Sort the datasets by mountpoint.
|
||||
*/
|
||||
qsort(cb.cb_handles, cb.cb_used, sizeof (void *),
|
||||
libzfs_dataset_cmp);
|
||||
|
||||
/*
|
||||
* And mount all the datasets, keeping track of which ones
|
||||
* succeeded or failed.
|
||||
*/
|
||||
if ((good = zfs_alloc(zhp->zpool_hdl,
|
||||
cb.cb_used * sizeof (int))) == NULL)
|
||||
if (zfs_iter_filesystems(zfsp, zfs_iter_cb, &cb) != 0)
|
||||
goto out;
|
||||
|
||||
ret = 0;
|
||||
for (i = 0; i < cb.cb_used; i++) {
|
||||
/*
|
||||
* don't attempt to mount encrypted datasets with
|
||||
* unloaded keys
|
||||
* Mount all filesystems
|
||||
*/
|
||||
if (zfs_prop_get_int(cb.cb_handles[i], ZFS_PROP_KEYSTATUS) ==
|
||||
ZFS_KEYSTATUS_UNAVAILABLE)
|
||||
continue;
|
||||
|
||||
if (zfs_mount(cb.cb_handles[i], mntopts, flags) != 0)
|
||||
ret = -1;
|
||||
else
|
||||
good[i] = 1;
|
||||
}
|
||||
ms.ms_mntopts = mntopts;
|
||||
ms.ms_mntflags = flags;
|
||||
zfs_foreach_mountpoint(zhp->zpool_hdl, cb.cb_handles, cb.cb_used,
|
||||
zfs_mount_one, &ms, B_TRUE);
|
||||
if (ms.ms_mntstatus != 0)
|
||||
ret = ms.ms_mntstatus;
|
||||
|
||||
/*
|
||||
* Then share all the ones that need to be shared. This needs
|
||||
* to be a separate pass in order to avoid excessive reloading
|
||||
* of the configuration. Good should never be NULL since
|
||||
* zfs_alloc is supposed to exit if memory isn't available.
|
||||
* Share all filesystems that need to be shared. This needs to be
|
||||
* a separate pass because libshare is not mt-safe, and so we need
|
||||
* to share serially.
|
||||
*/
|
||||
for (i = 0; i < cb.cb_used; i++) {
|
||||
if (good[i] && zfs_share(cb.cb_handles[i]) != 0)
|
||||
ret = -1;
|
||||
}
|
||||
|
||||
free(good);
|
||||
ms.ms_mntstatus = 0;
|
||||
zfs_foreach_mountpoint(zhp->zpool_hdl, cb.cb_handles, cb.cb_used,
|
||||
zfs_share_one, &ms, B_FALSE);
|
||||
if (ms.ms_mntstatus != 0)
|
||||
ret = ms.ms_mntstatus;
|
||||
|
||||
out:
|
||||
for (i = 0; i < cb.cb_used; i++)
|
||||
for (int i = 0; i < cb.cb_used; i++)
|
||||
zfs_close(cb.cb_handles[i]);
|
||||
free(cb.cb_handles);
|
||||
|
||||
|
||||
@ -181,7 +181,7 @@ tests = ['zfs_mount_001_pos', 'zfs_mount_002_pos', 'zfs_mount_003_pos',
|
||||
'zfs_mount_007_pos', 'zfs_mount_008_pos', 'zfs_mount_009_neg',
|
||||
'zfs_mount_010_neg', 'zfs_mount_011_neg', 'zfs_mount_012_neg',
|
||||
'zfs_mount_all_001_pos', 'zfs_mount_encrypted', 'zfs_mount_remount',
|
||||
'zfs_multi_mount']
|
||||
'zfs_multi_mount', 'zfs_mount_all_fail', 'zfs_mount_all_mountpoints']
|
||||
tags = ['functional', 'cli_root', 'zfs_mount']
|
||||
|
||||
[tests/functional/cli_root/zfs_program]
|
||||
|
||||
@ -14,8 +14,10 @@ dist_pkgdata_SCRIPTS = \
|
||||
zfs_mount_010_neg.ksh \
|
||||
zfs_mount_011_neg.ksh \
|
||||
zfs_mount_012_neg.ksh \
|
||||
zfs_mount_encrypted.ksh \
|
||||
zfs_mount_all_001_pos.ksh \
|
||||
zfs_mount_all_fail.ksh \
|
||||
zfs_mount_all_mountpoints.ksh \
|
||||
zfs_mount_encrypted.ksh \
|
||||
zfs_mount_remount.ksh \
|
||||
zfs_multi_mount.ksh
|
||||
|
||||
|
||||
@ -25,7 +25,7 @@
|
||||
#
|
||||
|
||||
#
|
||||
# Copyright (c) 2016 by Delphix. All rights reserved.
|
||||
# Copyright (c) 2017 by Delphix. All rights reserved.
|
||||
#
|
||||
|
||||
. $STF_SUITE/include/libtest.shlib
|
||||
@ -84,14 +84,12 @@ function setup_filesystem #disklist #pool #fs #mntpoint #type #vdev
|
||||
fi
|
||||
|
||||
case "$type" in
|
||||
'ctr') log_must zfs create $pool/$fs
|
||||
log_must zfs set mountpoint=$mntpoint $pool/$fs
|
||||
'ctr') log_must zfs create -o mountpoint=$mntpoint $pool/$fs
|
||||
;;
|
||||
'vol') log_must zfs create -V $VOLSIZE $pool/$fs
|
||||
block_device_wait
|
||||
;;
|
||||
*) log_must zfs create $pool/$fs
|
||||
log_must zfs set mountpoint=$mntpoint $pool/$fs
|
||||
*) log_must zfs create -o mountpoint=$mntpoint $pool/$fs
|
||||
;;
|
||||
esac
|
||||
|
||||
|
||||
96
tests/zfs-tests/tests/functional/cli_root/zfs_mount/zfs_mount_all_fail.ksh
Executable file
96
tests/zfs-tests/tests/functional/cli_root/zfs_mount/zfs_mount_all_fail.ksh
Executable file
@ -0,0 +1,96 @@
|
||||
#!/bin/ksh -p
|
||||
#
|
||||
# CDDL HEADER START
|
||||
#
|
||||
# This file and its contents are supplied under the terms of the
|
||||
# Common Development and Distribution License ("CDDL"), version 1.0.
|
||||
# You may only use this file in accordance with the terms of version
|
||||
# 1.0 of the CDDL.
|
||||
#
|
||||
# A full copy of the text of the CDDL should have accompanied this
|
||||
# source. A copy of the CDDL is also available via the Internet at
|
||||
# http://www.illumos.org/license/CDDL.
|
||||
#
|
||||
# CDDL HEADER END
|
||||
#
|
||||
|
||||
#
|
||||
# Copyright (c) 2017 by Delphix. All rights reserved.
|
||||
#
|
||||
|
||||
. $STF_SUITE/include/libtest.shlib
|
||||
. $STF_SUITE/tests/functional/cli_root/zfs_mount/zfs_mount.kshlib
|
||||
|
||||
# DESCRIPTION:
|
||||
# Verify that if 'zfs mount -a' fails to mount one filesystem,
|
||||
# the command fails with a non-zero error code, but all other
|
||||
# filesystems are mounted.
|
||||
#
|
||||
# STRATEGY:
|
||||
# 1. Create zfs filesystems
|
||||
# 2. Unmount a leaf filesystem
|
||||
# 3. Create a file in the above filesystem's mountpoint
|
||||
# 4. Verify that 'zfs mount -a' fails to mount the above
|
||||
# 5. Verify that all other filesystems were mounted
|
||||
#
|
||||
|
||||
verify_runnable "both"
|
||||
|
||||
typeset -a filesystems
|
||||
typeset path=${TEST_BASE_DIR%%/}/testroot$$/$TESTPOOL
|
||||
typeset fscount=10
|
||||
|
||||
function setup_all
|
||||
{
|
||||
# Create $fscount filesystems at the top level of $path
|
||||
for ((i=0; i<$fscount; i++)); do
|
||||
setup_filesystem "$DISKS" "$TESTPOOL" $i "$path/$i" ctr
|
||||
done
|
||||
|
||||
zfs list -r $TESTPOOL
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
function cleanup_all
|
||||
{
|
||||
export __ZFS_POOL_RESTRICT="$TESTPOOL"
|
||||
log_must zfs $unmountall
|
||||
unset __ZFS_POOL_RESTRICT
|
||||
|
||||
[[ -d ${TEST_BASE_DIR%%/}/testroot$$ ]] && \
|
||||
rm -rf ${TEST_BASE_DIR%%/}/testroot$$
|
||||
}
|
||||
|
||||
log_onexit cleanup_all
|
||||
|
||||
log_must setup_all
|
||||
|
||||
#
|
||||
# Unmount all of the above so that we can create the stray file
|
||||
# in one of the mountpoint directories.
|
||||
#
|
||||
export __ZFS_POOL_RESTRICT="$TESTPOOL"
|
||||
log_must zfs $unmountall
|
||||
unset __ZFS_POOL_RESTRICT
|
||||
|
||||
# All of our filesystems should be unmounted at this point
|
||||
for ((i=0; i<$fscount; i++)); do
|
||||
log_mustnot mounted "$TESTPOOL/$i"
|
||||
done
|
||||
|
||||
# Create a stray file in one filesystem's mountpoint
|
||||
touch $path/0/strayfile
|
||||
|
||||
# Verify that zfs mount -a fails
|
||||
export __ZFS_POOL_RESTRICT="$TESTPOOL"
|
||||
log_mustnot zfs $mountall
|
||||
unset __ZFS_POOL_RESTRICT
|
||||
|
||||
# All filesystems except for "0" should be mounted
|
||||
log_mustnot mounted "$TESTPOOL/0"
|
||||
for ((i=1; i<$fscount; i++)); do
|
||||
log_must mounted "$TESTPOOL/$i"
|
||||
done
|
||||
|
||||
log_pass "'zfs $mountall' failed as expected."
|
||||
@ -0,0 +1,162 @@
|
||||
#!/bin/ksh -p
|
||||
#
|
||||
# CDDL HEADER START
|
||||
#
|
||||
# This file and its contents are supplied under the terms of the
|
||||
# Common Development and Distribution License ("CDDL"), version 1.0.
|
||||
# You may only use this file in accordance with the terms of version
|
||||
# 1.0 of the CDDL.
|
||||
#
|
||||
# A full copy of the text of the CDDL should have accompanied this
|
||||
# source. A copy of the CDDL is also available via the Internet at
|
||||
# http://www.illumos.org/license/CDDL.
|
||||
#
|
||||
# CDDL HEADER END
|
||||
#
|
||||
|
||||
#
|
||||
# Copyright (c) 2017 by Delphix. All rights reserved.
|
||||
#
|
||||
|
||||
. $STF_SUITE/include/libtest.shlib
|
||||
. $STF_SUITE/tests/functional/cli_root/zfs_mount/zfs_mount.kshlib
|
||||
|
||||
# DESCRIPTION:
|
||||
# Verify that 'zfs mount -a' succeeds given a set of filesystems
|
||||
# whose mountpoints have a parent/child relationship which is
|
||||
# counter to the filesystem parent/child relationship.
|
||||
#
|
||||
# STRATEGY:
|
||||
# 1. Create zfs filesystems within the given pool.
|
||||
# 2. Unmount all the filesystems.
|
||||
# 3. Verify that 'zfs mount -a' command succeed,
|
||||
# and all available ZFS filesystems are mounted.
|
||||
# 4. Verify that 'zfs mount' is identical with 'df -F zfs'
|
||||
#
|
||||
|
||||
verify_runnable "both"
|
||||
|
||||
typeset -a filesystems
|
||||
|
||||
function setup_all
|
||||
{
|
||||
typeset path=${TEST_BASE_DIR%%/}/testroot$$/$TESTPOOL
|
||||
typeset fscount=10
|
||||
|
||||
#
|
||||
# Generate an array of filesystem names that represent a deep
|
||||
# hierarchy as such:
|
||||
#
|
||||
# 0
|
||||
# 0/1
|
||||
# 0/1/2
|
||||
# 0/1/2/3
|
||||
# 0/1/2/3/4
|
||||
# ...
|
||||
#
|
||||
fs=0
|
||||
for ((i=0; i<$fscount; i++)); do
|
||||
if [[ $i -gt 0 ]]; then
|
||||
fs=$fs/$i
|
||||
fi
|
||||
filesystems+=($fs)
|
||||
done
|
||||
|
||||
# Create all of the above filesystems
|
||||
for ((i=0; i<$fscount; i++)); do
|
||||
fs=${filesystems[$i]}
|
||||
setup_filesystem "$DISKS" "$TESTPOOL" "$fs" "$path/$i" ctr
|
||||
done
|
||||
|
||||
zfs list -r $TESTPOOL
|
||||
|
||||
#
|
||||
# Unmount all of the above so that we can setup our convoluted
|
||||
# mount paths.
|
||||
#
|
||||
export __ZFS_POOL_RESTRICT="$TESTPOOL"
|
||||
log_must zfs $unmountall
|
||||
unset __ZFS_POOL_RESTRICT
|
||||
|
||||
#
|
||||
# Configure the mount paths so that each mountpoint is contained
|
||||
# in a child filesystem. We should end up with something like the
|
||||
# following structure (modulo the number of filesystems):
|
||||
#
|
||||
# NAME MOUNTPOINT
|
||||
# testpool /testpool
|
||||
# testpool/0 /testroot25416/testpool/0/1/2/3/4/5/6
|
||||
# testpool/0/1 /testroot25416/testpool/0/1/2/3/4/5
|
||||
# testpool/0/1/2 /testroot25416/testpool/0/1/2/3/4
|
||||
# testpool/0/1/2/3 /testroot25416/testpool/0/1/2/3
|
||||
# testpool/0/1/2/3/4 /testroot25416/testpool/0/1/2
|
||||
# testpool/0/1/2/3/4/5 /testroot25416/testpool/0/1
|
||||
# testpool/0/1/2/3/4/5/6 /testroot25416/testpool/0
|
||||
#
|
||||
for ((i=0; i<$fscount; i++)); do
|
||||
fs=$TESTPOOL/${filesystems[$(($fscount - $i - 1))]}
|
||||
mnt=$path/${filesystems[$i]}
|
||||
zfs set mountpoint=$mnt $fs
|
||||
done
|
||||
|
||||
zfs list -r $TESTPOOL
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
function cleanup_all
|
||||
{
|
||||
export __ZFS_POOL_RESTRICT="$TESTPOOL"
|
||||
log_must zfs $unmountall
|
||||
unset __ZFS_POOL_RESTRICT
|
||||
|
||||
for fs in ${filesystems[@]}; do
|
||||
cleanup_filesystem "$TESTPOOL" "$fs"
|
||||
done
|
||||
[[ -d ${TEST_BASE_DIR%%/}/testroot$$ ]] && \
|
||||
rm -rf ${TEST_BASE_DIR%%/}/testroot$$
|
||||
}
|
||||
|
||||
#
|
||||
# This function takes a single true/false argument. If true it will verify that
|
||||
# all file systems are mounted. If false it will verify that they are not
|
||||
# mounted.
|
||||
#
|
||||
function verify_all
|
||||
{
|
||||
if $1; then
|
||||
logfunc=log_must
|
||||
else
|
||||
logfunc=log_mustnot
|
||||
fi
|
||||
|
||||
for fs in ${filesystems[@]}; do
|
||||
$logfunc mounted "$TESTPOOL/$fs"
|
||||
done
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
log_onexit cleanup_all
|
||||
|
||||
log_must setup_all
|
||||
|
||||
export __ZFS_POOL_RESTRICT="$TESTPOOL"
|
||||
log_must zfs $unmountall
|
||||
unset __ZFS_POOL_RESTRICT
|
||||
|
||||
verify_all false
|
||||
|
||||
export __ZFS_POOL_RESTRICT="$TESTPOOL"
|
||||
log_must zfs $mountall
|
||||
unset __ZFS_POOL_RESTRICT
|
||||
|
||||
verify_all true
|
||||
|
||||
log_note "Verify that 'zfs $mountcmd' will display " \
|
||||
"all ZFS filesystems currently mounted."
|
||||
|
||||
verify_mount_display
|
||||
|
||||
log_pass "'zfs $mountall' succeeds as root, " \
|
||||
"and all available ZFS filesystems are mounted."
|
||||
Loading…
Reference in New Issue
Block a user