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![Linus Torvalds](/assets/img/avatar_default.png)
Here is the large set of driver core changes for 6.3-rc1. There's a lot of changes this development cycle, most of the work falls into two different categories: - fw_devlink fixes and updates. This has gone through numerous review cycles and lots of review and testing by lots of different devices. Hopefully all should be good now, and Saravana will be keeping a watch for any potential regression on odd embedded systems. - driver core changes to work to make struct bus_type able to be moved into read-only memory (i.e. const) The recent work with Rust has pointed out a number of areas in the driver core where we are passing around and working with structures that really do not have to be dynamic at all, and they should be able to be read-only making things safer overall. This is the contuation of that work (started last release with kobject changes) in moving struct bus_type to be constant. We didn't quite make it for this release, but the remaining patches will be finished up for the release after this one, but the groundwork has been laid for this effort. Other than that we have in here: - debugfs memory leak fixes in some subsystems - error path cleanups and fixes for some never-able-to-be-hit codepaths. - cacheinfo rework and fixes - Other tiny fixes, full details are in the shortlog All of these have been in linux-next for a while with no reported problems. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCY/ipdg8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ynL3gCgwzbcWu0So3piZyLiJKxsVo9C2EsAn3sZ9gN6 6oeFOjD3JDju3cQsfGgd =Su6W -----END PGP SIGNATURE----- Merge tag 'driver-core-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core updates from Greg KH: "Here is the large set of driver core changes for 6.3-rc1. There's a lot of changes this development cycle, most of the work falls into two different categories: - fw_devlink fixes and updates. This has gone through numerous review cycles and lots of review and testing by lots of different devices. Hopefully all should be good now, and Saravana will be keeping a watch for any potential regression on odd embedded systems. - driver core changes to work to make struct bus_type able to be moved into read-only memory (i.e. const) The recent work with Rust has pointed out a number of areas in the driver core where we are passing around and working with structures that really do not have to be dynamic at all, and they should be able to be read-only making things safer overall. This is the contuation of that work (started last release with kobject changes) in moving struct bus_type to be constant. We didn't quite make it for this release, but the remaining patches will be finished up for the release after this one, but the groundwork has been laid for this effort. Other than that we have in here: - debugfs memory leak fixes in some subsystems - error path cleanups and fixes for some never-able-to-be-hit codepaths. - cacheinfo rework and fixes - Other tiny fixes, full details are in the shortlog All of these have been in linux-next for a while with no reported problems" [ Geert Uytterhoeven points out that that last sentence isn't true, and that there's a pending report that has a fix that is queued up - Linus ] * tag 'driver-core-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (124 commits) debugfs: drop inline constant formatting for ERR_PTR(-ERROR) OPP: fix error checking in opp_migrate_dentry() debugfs: update comment of debugfs_rename() i3c: fix device.h kernel-doc warnings dma-mapping: no need to pass a bus_type into get_arch_dma_ops() driver core: class: move EXPORT_SYMBOL_GPL() lines to the correct place Revert "driver core: add error handling for devtmpfs_create_node()" Revert "devtmpfs: add debug info to handle()" Revert "devtmpfs: remove return value of devtmpfs_delete_node()" driver core: cpu: don't hand-override the uevent bus_type callback. devtmpfs: remove return value of devtmpfs_delete_node() devtmpfs: add debug info to handle() driver core: add error handling for devtmpfs_create_node() driver core: bus: update my copyright notice driver core: bus: add bus_get_dev_root() function driver core: bus: constify bus_unregister() driver core: bus: constify some internal functions driver core: bus: constify bus_get_kset() driver core: bus: constify bus_register/unregister_notifier() driver core: remove private pointer from struct bus_type ...
802 lines
20 KiB
C
802 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/sched.h>
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#include <linux/cred.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/module.h>
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#include <linux/kobject.h>
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#include <linux/uaccess.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/blkdev.h>
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#include "gfs2.h"
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#include "incore.h"
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#include "sys.h"
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#include "super.h"
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#include "glock.h"
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#include "quota.h"
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#include "util.h"
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#include "glops.h"
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#include "recovery.h"
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struct gfs2_attr {
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struct attribute attr;
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ssize_t (*show)(struct gfs2_sbd *, char *);
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ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
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};
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static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
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char *buf)
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{
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struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
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struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
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return a->show ? a->show(sdp, buf) : 0;
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}
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static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
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const char *buf, size_t len)
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{
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struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
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struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
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return a->store ? a->store(sdp, buf, len) : len;
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}
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static const struct sysfs_ops gfs2_attr_ops = {
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.show = gfs2_attr_show,
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.store = gfs2_attr_store,
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};
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static struct kset *gfs2_kset;
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static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%u:%u\n",
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MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
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}
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static ssize_t status_show(struct gfs2_sbd *sdp, char *buf)
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{
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unsigned long f = sdp->sd_flags;
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ssize_t s;
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s = snprintf(buf, PAGE_SIZE,
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"Journal Checked: %d\n"
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"Journal Live: %d\n"
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"Journal ID: %d\n"
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"Spectator: %d\n"
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"Withdrawn: %d\n"
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"No barriers: %d\n"
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"No recovery: %d\n"
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"Demote: %d\n"
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"No Journal ID: %d\n"
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"Mounted RO: %d\n"
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"RO Recovery: %d\n"
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"Skip DLM Unlock: %d\n"
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"Force AIL Flush: %d\n"
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"FS Frozen: %d\n"
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"Withdrawing: %d\n"
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"Withdraw In Prog: %d\n"
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"Remote Withdraw: %d\n"
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"Withdraw Recovery: %d\n"
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"Deactivating: %d\n"
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"sd_log_error: %d\n"
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"sd_log_flush_lock: %d\n"
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"sd_log_num_revoke: %u\n"
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"sd_log_in_flight: %d\n"
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"sd_log_blks_needed: %d\n"
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"sd_log_blks_free: %d\n"
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"sd_log_flush_head: %d\n"
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"sd_log_flush_tail: %d\n"
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"sd_log_blks_reserved: %d\n"
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"sd_log_revokes_available: %d\n",
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test_bit(SDF_JOURNAL_CHECKED, &f),
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test_bit(SDF_JOURNAL_LIVE, &f),
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(sdp->sd_jdesc ? sdp->sd_jdesc->jd_jid : 0),
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(sdp->sd_args.ar_spectator ? 1 : 0),
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test_bit(SDF_WITHDRAWN, &f),
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test_bit(SDF_NOBARRIERS, &f),
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test_bit(SDF_NORECOVERY, &f),
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test_bit(SDF_DEMOTE, &f),
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test_bit(SDF_NOJOURNALID, &f),
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(sb_rdonly(sdp->sd_vfs) ? 1 : 0),
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test_bit(SDF_RORECOVERY, &f),
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test_bit(SDF_SKIP_DLM_UNLOCK, &f),
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test_bit(SDF_FORCE_AIL_FLUSH, &f),
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test_bit(SDF_FS_FROZEN, &f),
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test_bit(SDF_WITHDRAWING, &f),
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test_bit(SDF_WITHDRAW_IN_PROG, &f),
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test_bit(SDF_REMOTE_WITHDRAW, &f),
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test_bit(SDF_WITHDRAW_RECOVERY, &f),
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test_bit(SDF_DEACTIVATING, &f),
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sdp->sd_log_error,
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rwsem_is_locked(&sdp->sd_log_flush_lock),
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sdp->sd_log_num_revoke,
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atomic_read(&sdp->sd_log_in_flight),
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atomic_read(&sdp->sd_log_blks_needed),
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atomic_read(&sdp->sd_log_blks_free),
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sdp->sd_log_flush_head,
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sdp->sd_log_flush_tail,
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sdp->sd_log_blks_reserved,
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atomic_read(&sdp->sd_log_revokes_available));
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return s;
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}
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static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
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}
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static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
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{
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struct super_block *s = sdp->sd_vfs;
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buf[0] = '\0';
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if (uuid_is_null(&s->s_uuid))
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return 0;
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return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid);
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}
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static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
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{
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struct super_block *sb = sdp->sd_vfs;
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int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
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return snprintf(buf, PAGE_SIZE, "%d\n", frozen);
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}
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static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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int error, n;
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error = kstrtoint(buf, 0, &n);
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if (error)
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return error;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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switch (n) {
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case 0:
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error = thaw_super(sdp->sd_vfs);
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break;
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case 1:
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error = freeze_super(sdp->sd_vfs);
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break;
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default:
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return -EINVAL;
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}
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if (error) {
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fs_warn(sdp, "freeze %d error %d\n", n, error);
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return error;
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}
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return len;
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}
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static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
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{
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unsigned int b = gfs2_withdrawn(sdp);
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return snprintf(buf, PAGE_SIZE, "%u\n", b);
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}
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static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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int error, val;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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error = kstrtoint(buf, 0, &val);
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if (error)
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return error;
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if (val != 1)
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return -EINVAL;
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gfs2_lm(sdp, "withdrawing from cluster at user's request\n");
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gfs2_withdraw(sdp);
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return len;
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}
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static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
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size_t len)
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{
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int error, val;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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error = kstrtoint(buf, 0, &val);
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if (error)
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return error;
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if (val != 1)
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return -EINVAL;
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gfs2_statfs_sync(sdp->sd_vfs, 0);
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return len;
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}
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static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
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size_t len)
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{
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int error, val;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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error = kstrtoint(buf, 0, &val);
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if (error)
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return error;
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if (val != 1)
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return -EINVAL;
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gfs2_quota_sync(sdp->sd_vfs, 0);
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return len;
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}
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static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
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size_t len)
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{
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struct kqid qid;
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int error;
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u32 id;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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error = kstrtou32(buf, 0, &id);
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if (error)
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return error;
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qid = make_kqid(current_user_ns(), USRQUOTA, id);
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if (!qid_valid(qid))
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return -EINVAL;
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error = gfs2_quota_refresh(sdp, qid);
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return error ? error : len;
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}
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static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
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size_t len)
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{
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struct kqid qid;
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int error;
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u32 id;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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error = kstrtou32(buf, 0, &id);
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if (error)
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return error;
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qid = make_kqid(current_user_ns(), GRPQUOTA, id);
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if (!qid_valid(qid))
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return -EINVAL;
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error = gfs2_quota_refresh(sdp, qid);
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return error ? error : len;
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}
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static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
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struct gfs2_glock *gl;
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const struct gfs2_glock_operations *glops;
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unsigned int glmode;
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unsigned int gltype;
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unsigned long long glnum;
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char mode[16];
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int rv;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
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mode);
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if (rv != 3)
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return -EINVAL;
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if (strcmp(mode, "EX") == 0)
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glmode = LM_ST_UNLOCKED;
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else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
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glmode = LM_ST_DEFERRED;
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else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
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glmode = LM_ST_SHARED;
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else
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return -EINVAL;
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if (gltype > LM_TYPE_JOURNAL)
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return -EINVAL;
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if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
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glops = &gfs2_freeze_glops;
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else
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glops = gfs2_glops_list[gltype];
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if (glops == NULL)
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return -EINVAL;
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if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
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fs_info(sdp, "demote interface used\n");
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rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
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if (rv)
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return rv;
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gfs2_glock_cb(gl, glmode);
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gfs2_glock_put(gl);
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return len;
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}
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#define GFS2_ATTR(name, mode, show, store) \
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static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
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GFS2_ATTR(id, 0444, id_show, NULL);
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GFS2_ATTR(fsname, 0444, fsname_show, NULL);
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GFS2_ATTR(uuid, 0444, uuid_show, NULL);
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GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
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GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
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GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
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GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
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GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
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GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
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GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
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GFS2_ATTR(status, 0400, status_show, NULL);
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static struct attribute *gfs2_attrs[] = {
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&gfs2_attr_id.attr,
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&gfs2_attr_fsname.attr,
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&gfs2_attr_uuid.attr,
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&gfs2_attr_freeze.attr,
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&gfs2_attr_withdraw.attr,
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&gfs2_attr_statfs_sync.attr,
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&gfs2_attr_quota_sync.attr,
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&gfs2_attr_quota_refresh_user.attr,
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&gfs2_attr_quota_refresh_group.attr,
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&gfs2_attr_demote_rq.attr,
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&gfs2_attr_status.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(gfs2);
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static void gfs2_sbd_release(struct kobject *kobj)
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{
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struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
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complete(&sdp->sd_kobj_unregister);
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}
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static struct kobj_type gfs2_ktype = {
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.release = gfs2_sbd_release,
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.default_groups = gfs2_groups,
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.sysfs_ops = &gfs2_attr_ops,
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};
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/*
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* lock_module. Originally from lock_dlm
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*/
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static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
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{
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const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
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return sprintf(buf, "%s\n", ops->lm_proto_name);
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}
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static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
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{
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struct lm_lockstruct *ls = &sdp->sd_lockstruct;
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ssize_t ret;
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int val = 0;
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if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
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val = 1;
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ret = sprintf(buf, "%d\n", val);
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return ret;
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}
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static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
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{
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
|
int ret, val;
|
|
|
|
ret = kstrtoint(buf, 0, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (val == 1)
|
|
set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
|
|
else if (val == 0) {
|
|
clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
|
|
smp_mb__after_atomic();
|
|
gfs2_glock_thaw(sdp);
|
|
} else {
|
|
return -EINVAL;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
|
|
{
|
|
int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
|
|
|
|
return sprintf(buf, "%d\n", val);
|
|
}
|
|
|
|
static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
|
|
{
|
|
int ret, val;
|
|
|
|
ret = kstrtoint(buf, 0, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if ((val == 1) &&
|
|
!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
|
|
complete(&sdp->sd_wdack);
|
|
else
|
|
return -EINVAL;
|
|
return len;
|
|
}
|
|
|
|
static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
|
|
{
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
|
return sprintf(buf, "%d\n", ls->ls_first);
|
|
}
|
|
|
|
static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
|
|
{
|
|
unsigned first;
|
|
int rv;
|
|
|
|
rv = sscanf(buf, "%u", &first);
|
|
if (rv != 1 || first > 1)
|
|
return -EINVAL;
|
|
rv = wait_for_completion_killable(&sdp->sd_locking_init);
|
|
if (rv)
|
|
return rv;
|
|
spin_lock(&sdp->sd_jindex_spin);
|
|
rv = -EBUSY;
|
|
if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
|
|
goto out;
|
|
rv = -EINVAL;
|
|
if (sdp->sd_args.ar_spectator)
|
|
goto out;
|
|
if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
|
|
goto out;
|
|
sdp->sd_lockstruct.ls_first = first;
|
|
rv = 0;
|
|
out:
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
|
return rv ? rv : len;
|
|
}
|
|
|
|
static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
|
|
{
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
|
return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
|
|
}
|
|
|
|
int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
|
|
{
|
|
struct gfs2_jdesc *jd;
|
|
int rv;
|
|
|
|
/* Wait for our primary journal to be initialized */
|
|
wait_for_completion(&sdp->sd_journal_ready);
|
|
|
|
spin_lock(&sdp->sd_jindex_spin);
|
|
rv = -EBUSY;
|
|
/**
|
|
* If we're a spectator, we use journal0, but it's not really ours.
|
|
* So we need to wait for its recovery too. If we skip it we'd never
|
|
* queue work to the recovery workqueue, and so its completion would
|
|
* never clear the DFL_BLOCK_LOCKS flag, so all our locks would
|
|
* permanently stop working.
|
|
*/
|
|
if (!sdp->sd_jdesc)
|
|
goto out;
|
|
if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator)
|
|
goto out;
|
|
rv = -ENOENT;
|
|
list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
|
|
if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator)
|
|
continue;
|
|
rv = gfs2_recover_journal(jd, false);
|
|
break;
|
|
}
|
|
out:
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
|
return rv;
|
|
}
|
|
|
|
static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
|
|
{
|
|
unsigned jid;
|
|
int rv;
|
|
|
|
rv = sscanf(buf, "%u", &jid);
|
|
if (rv != 1)
|
|
return -EINVAL;
|
|
|
|
if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
|
|
rv = -ESHUTDOWN;
|
|
goto out;
|
|
}
|
|
|
|
rv = gfs2_recover_set(sdp, jid);
|
|
out:
|
|
return rv ? rv : len;
|
|
}
|
|
|
|
static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
|
|
{
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
|
return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
|
|
}
|
|
|
|
static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
|
|
{
|
|
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
|
|
return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
|
|
}
|
|
|
|
static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
|
|
}
|
|
|
|
static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
|
|
{
|
|
int jid;
|
|
int rv;
|
|
|
|
rv = sscanf(buf, "%d", &jid);
|
|
if (rv != 1)
|
|
return -EINVAL;
|
|
rv = wait_for_completion_killable(&sdp->sd_locking_init);
|
|
if (rv)
|
|
return rv;
|
|
spin_lock(&sdp->sd_jindex_spin);
|
|
rv = -EINVAL;
|
|
if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
|
|
goto out;
|
|
rv = -EBUSY;
|
|
if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
|
|
goto out;
|
|
rv = 0;
|
|
if (sdp->sd_args.ar_spectator && jid > 0)
|
|
rv = jid = -EINVAL;
|
|
sdp->sd_lockstruct.ls_jid = jid;
|
|
clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
|
|
smp_mb__after_atomic();
|
|
wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
|
|
out:
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
|
return rv ? rv : len;
|
|
}
|
|
|
|
#define GDLM_ATTR(_name,_mode,_show,_store) \
|
|
static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
|
|
|
|
GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
|
|
GDLM_ATTR(block, 0644, block_show, block_store);
|
|
GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store);
|
|
GDLM_ATTR(jid, 0644, jid_show, jid_store);
|
|
GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
|
|
GDLM_ATTR(first_done, 0444, first_done_show, NULL);
|
|
GDLM_ATTR(recover, 0600, NULL, recover_store);
|
|
GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
|
|
GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
|
|
|
|
static struct attribute *lock_module_attrs[] = {
|
|
&gdlm_attr_proto_name.attr,
|
|
&gdlm_attr_block.attr,
|
|
&gdlm_attr_withdraw.attr,
|
|
&gdlm_attr_jid.attr,
|
|
&gdlm_attr_first.attr,
|
|
&gdlm_attr_first_done.attr,
|
|
&gdlm_attr_recover.attr,
|
|
&gdlm_attr_recover_done.attr,
|
|
&gdlm_attr_recover_status.attr,
|
|
NULL,
|
|
};
|
|
|
|
/*
|
|
* get and set struct gfs2_tune fields
|
|
*/
|
|
|
|
static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
|
|
{
|
|
return snprintf(buf, PAGE_SIZE, "%u %u\n",
|
|
sdp->sd_tune.gt_quota_scale_num,
|
|
sdp->sd_tune.gt_quota_scale_den);
|
|
}
|
|
|
|
static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
|
|
size_t len)
|
|
{
|
|
struct gfs2_tune *gt = &sdp->sd_tune;
|
|
unsigned int x, y;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
|
|
return -EINVAL;
|
|
|
|
spin_lock(>->gt_spin);
|
|
gt->gt_quota_scale_num = x;
|
|
gt->gt_quota_scale_den = y;
|
|
spin_unlock(>->gt_spin);
|
|
return len;
|
|
}
|
|
|
|
static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
|
|
int check_zero, const char *buf, size_t len)
|
|
{
|
|
struct gfs2_tune *gt = &sdp->sd_tune;
|
|
unsigned int x;
|
|
int error;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
error = kstrtouint(buf, 0, &x);
|
|
if (error)
|
|
return error;
|
|
|
|
if (check_zero && !x)
|
|
return -EINVAL;
|
|
|
|
spin_lock(>->gt_spin);
|
|
*field = x;
|
|
spin_unlock(>->gt_spin);
|
|
return len;
|
|
}
|
|
|
|
#define TUNE_ATTR_3(name, show, store) \
|
|
static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
|
|
|
|
#define TUNE_ATTR_2(name, store) \
|
|
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
|
|
{ \
|
|
return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
|
|
} \
|
|
TUNE_ATTR_3(name, name##_show, store)
|
|
|
|
#define TUNE_ATTR(name, check_zero) \
|
|
static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
|
|
{ \
|
|
return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
|
|
} \
|
|
TUNE_ATTR_2(name, name##_store)
|
|
|
|
TUNE_ATTR(quota_warn_period, 0);
|
|
TUNE_ATTR(quota_quantum, 0);
|
|
TUNE_ATTR(max_readahead, 0);
|
|
TUNE_ATTR(complain_secs, 0);
|
|
TUNE_ATTR(statfs_slow, 0);
|
|
TUNE_ATTR(new_files_jdata, 0);
|
|
TUNE_ATTR(statfs_quantum, 1);
|
|
TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
|
|
|
|
static struct attribute *tune_attrs[] = {
|
|
&tune_attr_quota_warn_period.attr,
|
|
&tune_attr_quota_quantum.attr,
|
|
&tune_attr_max_readahead.attr,
|
|
&tune_attr_complain_secs.attr,
|
|
&tune_attr_statfs_slow.attr,
|
|
&tune_attr_statfs_quantum.attr,
|
|
&tune_attr_quota_scale.attr,
|
|
&tune_attr_new_files_jdata.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group tune_group = {
|
|
.name = "tune",
|
|
.attrs = tune_attrs,
|
|
};
|
|
|
|
static const struct attribute_group lock_module_group = {
|
|
.name = "lock_module",
|
|
.attrs = lock_module_attrs,
|
|
};
|
|
|
|
int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
|
|
{
|
|
struct super_block *sb = sdp->sd_vfs;
|
|
int error;
|
|
char ro[20];
|
|
char spectator[20];
|
|
char *envp[] = { ro, spectator, NULL };
|
|
|
|
sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
|
|
sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
|
|
|
|
init_completion(&sdp->sd_kobj_unregister);
|
|
sdp->sd_kobj.kset = gfs2_kset;
|
|
error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
|
|
"%s", sdp->sd_table_name);
|
|
if (error)
|
|
goto fail_reg;
|
|
|
|
error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
|
|
if (error)
|
|
goto fail_reg;
|
|
|
|
error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
|
|
if (error)
|
|
goto fail_tune;
|
|
|
|
error = sysfs_create_link(&sdp->sd_kobj,
|
|
&disk_to_dev(sb->s_bdev->bd_disk)->kobj,
|
|
"device");
|
|
if (error)
|
|
goto fail_lock_module;
|
|
|
|
kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
|
|
return 0;
|
|
|
|
fail_lock_module:
|
|
sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
|
|
fail_tune:
|
|
sysfs_remove_group(&sdp->sd_kobj, &tune_group);
|
|
fail_reg:
|
|
fs_err(sdp, "error %d adding sysfs files\n", error);
|
|
kobject_put(&sdp->sd_kobj);
|
|
wait_for_completion(&sdp->sd_kobj_unregister);
|
|
sb->s_fs_info = NULL;
|
|
return error;
|
|
}
|
|
|
|
void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
|
|
{
|
|
sysfs_remove_link(&sdp->sd_kobj, "device");
|
|
sysfs_remove_group(&sdp->sd_kobj, &tune_group);
|
|
sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
|
|
kobject_put(&sdp->sd_kobj);
|
|
wait_for_completion(&sdp->sd_kobj_unregister);
|
|
}
|
|
|
|
static int gfs2_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
|
|
{
|
|
const struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
|
|
const struct super_block *s = sdp->sd_vfs;
|
|
|
|
add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
|
|
add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
|
|
if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
|
|
add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
|
|
if (!uuid_is_null(&s->s_uuid))
|
|
add_uevent_var(env, "UUID=%pUB", &s->s_uuid);
|
|
return 0;
|
|
}
|
|
|
|
static const struct kset_uevent_ops gfs2_uevent_ops = {
|
|
.uevent = gfs2_uevent,
|
|
};
|
|
|
|
int gfs2_sys_init(void)
|
|
{
|
|
gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
|
|
if (!gfs2_kset)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void gfs2_sys_uninit(void)
|
|
{
|
|
kset_unregister(gfs2_kset);
|
|
}
|
|
|