* of the GNU General Public License version 2.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include "log.h"
#include "quota.h"
#include "dir.h"
+#include "meta_io.h"
#include "trace_gfs2.h"
#define DO 0
{
spin_lock_init(>->gt_spin);
- gt->gt_quota_simul_sync = 64;
gt->gt_quota_warn_period = 10;
gt->gt_quota_scale_num = 1;
gt->gt_quota_scale_den = 1;
static struct gfs2_sbd *init_sbd(struct super_block *sb)
{
struct gfs2_sbd *sdp;
+ struct address_space *mapping;
sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
if (!sdp)
INIT_LIST_HEAD(&sdp->sd_jindex_list);
spin_lock_init(&sdp->sd_jindex_spin);
mutex_init(&sdp->sd_jindex_mutex);
+ init_completion(&sdp->sd_journal_ready);
INIT_LIST_HEAD(&sdp->sd_quota_list);
mutex_init(&sdp->sd_quota_mutex);
+ mutex_init(&sdp->sd_quota_sync_mutex);
init_waitqueue_head(&sdp->sd_quota_wait);
INIT_LIST_HEAD(&sdp->sd_trunc_list);
spin_lock_init(&sdp->sd_trunc_lock);
+ spin_lock_init(&sdp->sd_bitmap_lock);
+
+ mapping = &sdp->sd_aspace;
+
+ address_space_init_once(mapping);
+ mapping->a_ops = &gfs2_rgrp_aops;
+ mapping->host = sb->s_bdev->bd_inode;
+ mapping->flags = 0;
+ mapping_set_gfp_mask(mapping, GFP_NOFS);
+ mapping->private_data = NULL;
+ mapping->writeback_index = 0;
spin_lock_init(&sdp->sd_log_lock);
atomic_set(&sdp->sd_log_pinned, 0);
- INIT_LIST_HEAD(&sdp->sd_log_le_buf);
INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
- INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
INIT_LIST_HEAD(&sdp->sd_log_le_ordered);
spin_lock_init(&sdp->sd_ordered_lock);
init_rwsem(&sdp->sd_log_flush_lock);
atomic_set(&sdp->sd_log_in_flight, 0);
+ atomic_set(&sdp->sd_reserving_log, 0);
+ init_waitqueue_head(&sdp->sd_reserving_log_wait);
init_waitqueue_head(&sdp->sd_log_flush_wait);
-
- INIT_LIST_HEAD(&sdp->sd_revoke_list);
+ atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
+ mutex_init(&sdp->sd_freeze_mutex);
return sdp;
}
if (sb->sb_magic != GFS2_MAGIC ||
sb->sb_type != GFS2_METATYPE_SB) {
if (!silent)
- printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
+ pr_warn("not a GFS2 filesystem\n");
return -EINVAL;
}
return -EINVAL;
}
-static void end_bio_io_page(struct bio *bio, int error)
+static void end_bio_io_page(struct bio *bio)
{
struct page *page = bio->bi_private;
- if (!error)
+ if (!bio->bi_error)
SetPageUptodate(page);
else
- printk(KERN_WARNING "gfs2: error %d reading superblock\n", error);
+ pr_warn("error %d reading superblock\n", bio->bi_error);
unlock_page(page);
}
page = alloc_page(GFP_NOFS);
if (unlikely(!page))
- return -ENOBUFS;
+ return -ENOMEM;
ClearPageUptodate(page);
ClearPageDirty(page);
lock_page(page);
bio = bio_alloc(GFP_NOFS, 1);
- bio->bi_sector = sector * (sb->s_blocksize >> 9);
+ bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9);
bio->bi_bdev = sb->s_bdev;
bio_add_page(bio, page, PAGE_SIZE, 0);
goto fail_live;
}
- error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
- CREATE, &sdp->sd_trans_gl);
+ error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops,
+ CREATE, &sdp->sd_freeze_gl);
if (error) {
fs_err(sdp, "can't create transaction glock: %d\n", error);
goto fail_rename;
return 0;
fail_trans:
- gfs2_glock_put(sdp->sd_trans_gl);
+ gfs2_glock_put(sdp->sd_freeze_gl);
fail_rename:
gfs2_glock_put(sdp->sd_rename_gl);
fail_live:
return ret;
}
-/**
- * map_journal_extents - create a reusable "extent" mapping from all logical
- * blocks to all physical blocks for the given journal. This will save
- * us time when writing journal blocks. Most journals will have only one
- * extent that maps all their logical blocks. That's because gfs2.mkfs
- * arranges the journal blocks sequentially to maximize performance.
- * So the extent would map the first block for the entire file length.
- * However, gfs2_jadd can happen while file activity is happening, so
- * those journals may not be sequential. Less likely is the case where
- * the users created their own journals by mounting the metafs and
- * laying it out. But it's still possible. These journals might have
- * several extents.
- *
- * TODO: This should be done in bigger chunks rather than one block at a time,
- * but since it's only done at mount time, I'm not worried about the
- * time it takes.
- */
-static int map_journal_extents(struct gfs2_sbd *sdp)
-{
- struct gfs2_jdesc *jd = sdp->sd_jdesc;
- unsigned int lb;
- u64 db, prev_db; /* logical block, disk block, prev disk block */
- struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
- struct gfs2_journal_extent *jext = NULL;
- struct buffer_head bh;
- int rc = 0;
-
- prev_db = 0;
-
- for (lb = 0; lb < i_size_read(jd->jd_inode) >> sdp->sd_sb.sb_bsize_shift; lb++) {
- bh.b_state = 0;
- bh.b_blocknr = 0;
- bh.b_size = 1 << ip->i_inode.i_blkbits;
- rc = gfs2_block_map(jd->jd_inode, lb, &bh, 0);
- db = bh.b_blocknr;
- if (rc || !db) {
- printk(KERN_INFO "GFS2 journal mapping error %d: lb="
- "%u db=%llu\n", rc, lb, (unsigned long long)db);
- break;
- }
- if (!prev_db || db != prev_db + 1) {
- jext = kzalloc(sizeof(struct gfs2_journal_extent),
- GFP_KERNEL);
- if (!jext) {
- printk(KERN_INFO "GFS2 error: out of memory "
- "mapping journal extents.\n");
- rc = -ENOMEM;
- break;
- }
- jext->dblock = db;
- jext->lblock = lb;
- jext->blocks = 1;
- list_add_tail(&jext->extent_list, &jd->extent_list);
- } else {
- jext->blocks++;
- }
- prev_db = db;
- }
- return rc;
-}
-
static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
{
char *message = "FIRSTMOUNT=Done";
break;
INIT_LIST_HEAD(&jd->extent_list);
+ INIT_LIST_HEAD(&jd->jd_revoke_list);
+
INIT_WORK(&jd->jd_work, gfs2_recover_func);
jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
if (!jd->jd_inode || IS_ERR(jd->jd_inode)) {
return error;
}
+/**
+ * check_journal_clean - Make sure a journal is clean for a spectator mount
+ * @sdp: The GFS2 superblock
+ * @jd: The journal descriptor
+ *
+ * Returns: 0 if the journal is clean or locked, else an error
+ */
+static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd)
+{
+ int error;
+ struct gfs2_holder j_gh;
+ struct gfs2_log_header_host head;
+ struct gfs2_inode *ip;
+
+ ip = GFS2_I(jd->jd_inode);
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP |
+ GL_EXACT | GL_NOCACHE, &j_gh);
+ if (error) {
+ fs_err(sdp, "Error locking journal for spectator mount.\n");
+ return -EPERM;
+ }
+ error = gfs2_jdesc_check(jd);
+ if (error) {
+ fs_err(sdp, "Error checking journal for spectator mount.\n");
+ goto out_unlock;
+ }
+ error = gfs2_find_jhead(jd, &head);
+ if (error) {
+ fs_err(sdp, "Error parsing journal for spectator mount.\n");
+ goto out_unlock;
+ }
+ if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
+ error = -EPERM;
+ fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter "
+ "must not be a spectator.\n", jd->jd_jid);
+ }
+
+out_unlock:
+ gfs2_glock_dq_uninit(&j_gh);
+ return error;
+}
+
static int init_journal(struct gfs2_sbd *sdp, int undo)
{
- struct inode *master = sdp->sd_master_dir->d_inode;
+ struct inode *master = d_inode(sdp->sd_master_dir);
struct gfs2_holder ji_gh;
struct gfs2_inode *ip;
int jindex = 1;
atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
/* Map the extents for this journal's blocks */
- map_journal_extents(sdp);
+ gfs2_map_journal_extents(sdp, sdp->sd_jdesc);
}
trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free));
if (sdp->sd_lockstruct.ls_first) {
unsigned int x;
for (x = 0; x < sdp->sd_journals; x++) {
- error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x),
- true);
+ struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x);
+
+ if (sdp->sd_args.ar_spectator) {
+ error = check_journal_clean(sdp, jd);
+ if (error)
+ goto fail_jinode_gh;
+ continue;
+ }
+ error = gfs2_recover_journal(jd, true);
if (error) {
fs_err(sdp, "error recovering journal %u: %d\n",
x, error);
}
}
+ sdp->sd_log_idle = 1;
set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
gfs2_glock_dq_uninit(&ji_gh);
jindex = 0;
-
+ INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func);
return 0;
fail_jinode_gh:
static int init_inodes(struct gfs2_sbd *sdp, int undo)
{
int error = 0;
- struct inode *master = sdp->sd_master_dir->d_inode;
+ struct inode *master = d_inode(sdp->sd_master_dir);
if (undo)
goto fail_qinode;
error = init_journal(sdp, undo);
+ complete_all(&sdp->sd_journal_ready);
if (error)
goto fail;
char buf[30];
int error = 0;
struct gfs2_inode *ip;
- struct inode *master = sdp->sd_master_dir->d_inode;
+ struct inode *master = d_inode(sdp->sd_master_dir);
if (sdp->sd_args.ar_spectator)
return 0;
return error;
}
-static int init_threads(struct gfs2_sbd *sdp, int undo)
-{
- struct task_struct *p;
- int error = 0;
-
- if (undo)
- goto fail_quotad;
-
- p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
- error = IS_ERR(p);
- if (error) {
- fs_err(sdp, "can't start logd thread: %d\n", error);
- return error;
- }
- sdp->sd_logd_process = p;
-
- p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
- error = IS_ERR(p);
- if (error) {
- fs_err(sdp, "can't start quotad thread: %d\n", error);
- goto fail;
- }
- sdp->sd_quotad_process = p;
-
- return 0;
-
-
-fail_quotad:
- kthread_stop(sdp->sd_quotad_process);
-fail:
- kthread_stop(sdp->sd_logd_process);
- return error;
-}
-
static const match_table_t nolock_tokens = {
{ Opt_jid, "jid=%d\n", },
{ Opt_err, NULL },
lm = &gfs2_dlm_ops;
#endif
} else {
- printk(KERN_INFO "GFS2: can't find protocol %s\n", proto);
+ pr_info("can't find protocol %s\n", proto);
return -ENOENT;
}
lm->lm_unmount(sdp);
}
-static int gfs2_journalid_wait(void *word)
-{
- if (signal_pending(current))
- return -EINTR;
- schedule();
- return 0;
-}
-
static int wait_on_journal(struct gfs2_sbd *sdp)
{
if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
return 0;
- return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, gfs2_journalid_wait, TASK_INTERRUPTIBLE);
+ return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE)
+ ? -EINTR : 0;
}
void gfs2_online_uevent(struct gfs2_sbd *sdp)
sdp = init_sbd(sb);
if (!sdp) {
- printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
+ pr_warn("can't alloc struct gfs2_sbd\n");
return -ENOMEM;
}
sdp->sd_args = *args;
sb->s_export_op = &gfs2_export_ops;
sb->s_xattr = gfs2_xattr_handlers;
sb->s_qcop = &gfs2_quotactl_ops;
+ sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
sb->s_time_gran = 1;
sb->s_maxbytes = MAX_LFS_FILESIZE;
goto fail_per_node;
}
- error = init_threads(sdp, DO);
- if (error)
- goto fail_per_node;
-
if (!(sb->s_flags & MS_RDONLY)) {
error = gfs2_make_fs_rw(sdp);
if (error) {
fs_err(sdp, "can't make FS RW: %d\n", error);
- goto fail_threads;
+ goto fail_per_node;
}
}
gfs2_online_uevent(sdp);
return 0;
-fail_threads:
- init_threads(sdp, UNDO);
fail_per_node:
init_per_node(sdp, UNDO);
fail_inodes:
fail_locking:
init_locking(sdp, &mount_gh, UNDO);
fail_lm:
+ complete_all(&sdp->sd_journal_ready);
gfs2_gl_hash_clear(sdp);
gfs2_lm_unmount(sdp);
fail_debug:
if (IS_ERR(s))
goto error_bdev;
- if (s->s_root)
+ if (s->s_root) {
+ /*
+ * s_umount nests inside bd_mutex during
+ * __invalidate_device(). blkdev_put() acquires
+ * bd_mutex and can't be called under s_umount. Drop
+ * s_umount temporarily. This is safe as we're
+ * holding an active reference.
+ */
+ up_write(&s->s_umount);
blkdev_put(bdev, mode);
+ down_write(&s->s_umount);
+ } else {
+ /* s_mode must be set before deactivate_locked_super calls */
+ s->s_mode = mode;
+ }
memset(&args, 0, sizeof(args));
args.ar_quota = GFS2_QUOTA_DEFAULT;
error = gfs2_mount_args(&args, data);
if (error) {
- printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
+ pr_warn("can't parse mount arguments\n");
goto error_super;
}
} else {
char b[BDEVNAME_SIZE];
- s->s_mode = mode;
strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
sb_set_blocksize(s, block_size(bdev));
error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0);
error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
if (error) {
- printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
- dev_name, error);
+ pr_warn("path_lookup on %s returned error %d\n",
+ dev_name, error);
return ERR_PTR(error);
}
s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, flags,
- path.dentry->d_inode->i_sb->s_bdev);
+ d_inode(path.dentry)->i_sb->s_bdev);
path_put(&path);
if (IS_ERR(s)) {
- printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
+ pr_warn("gfs2 mount does not exist\n");
return ERR_CAST(s);
}
if ((flags ^ s->s_flags) & MS_RDONLY) {
return;
}
- gfs2_meta_syncfs(sdp);
+ gfs2_log_flush(sdp, NULL, SYNC_FLUSH);
dput(sdp->sd_root_dir);
dput(sdp->sd_master_dir);
sdp->sd_root_dir = NULL;
projects / firefly-linux-kernel-4.4.55.git / blobdiff