if (ui->data_len < 0 || ui->data_len > UBIFS_MAX_INO_DATA)
return 4;
- if (ui->xattr && (inode->i_mode & S_IFMT) != S_IFREG)
+ if (ui->xattr && !S_ISREG(inode->i_mode))
return 5;
if (!ubifs_compr_present(ui->compr_type)) {
ubifs_compr_name(ui->compr_type));
}
- err = dbg_check_dir_size(c, inode);
+ err = dbg_check_dir(c, inode);
return err;
}
goto out_ino;
inode->i_flags |= (S_NOCMTIME | S_NOATIME);
- inode->i_nlink = le32_to_cpu(ino->nlink);
+ set_nlink(inode, le32_to_cpu(ino->nlink));
inode->i_uid = le32_to_cpu(ino->uid);
inode->i_gid = le32_to_cpu(ino->gid);
inode->i_atime.tv_sec = (int64_t)le64_to_cpu(ino->atime_sec);
out_invalid:
ubifs_err("inode %lu validation failed, error %d", inode->i_ino, err);
- dbg_dump_node(c, ino);
- dbg_dump_inode(c, inode);
+ ubifs_dump_node(c, ino);
+ ubifs_dump_inode(c, inode);
err = -EINVAL;
out_ino:
kfree(ino);
return &ui->vfs_inode;
};
+static void ubifs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ kmem_cache_free(ubifs_inode_slab, ui);
+}
+
static void ubifs_destroy_inode(struct inode *inode)
{
struct ubifs_inode *ui = ubifs_inode(inode);
kfree(ui->data);
- kmem_cache_free(ubifs_inode_slab, inode);
+ call_rcu(&inode->i_rcu, ubifs_i_callback);
}
/*
* Note, Linux write-back code calls this without 'i_mutex'.
*/
-static int ubifs_write_inode(struct inode *inode, int wait)
+static int ubifs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
int err = 0;
struct ubifs_info *c = inode->i_sb->s_fs_info;
if (err)
ubifs_err("can't write inode %lu, error %d",
inode->i_ino, err);
+ else
+ err = dbg_check_inode_size(c, inode, ui->ui_size);
}
ui->dirty = 0;
return err;
}
-static void ubifs_delete_inode(struct inode *inode)
+static void ubifs_evict_inode(struct inode *inode)
{
int err;
struct ubifs_info *c = inode->i_sb->s_fs_info;
dbg_gen("inode %lu, mode %#x", inode->i_ino, (int)inode->i_mode);
ubifs_assert(!atomic_read(&inode->i_count));
- ubifs_assert(inode->i_nlink == 0);
truncate_inode_pages(&inode->i_data, 0);
+
+ if (inode->i_nlink)
+ goto done;
+
if (is_bad_inode(inode))
goto out;
out:
if (ui->dirty)
ubifs_release_dirty_inode_budget(c, ui);
+ else {
+ /* We've deleted something - clean the "no space" flags */
+ c->bi.nospace = c->bi.nospace_rp = 0;
+ smp_wmb();
+ }
+done:
clear_inode(inode);
}
-static void ubifs_dirty_inode(struct inode *inode)
+static void ubifs_dirty_inode(struct inode *inode, int flags)
{
struct ubifs_inode *ui = ubifs_inode(inode);
return 0;
}
-static int ubifs_show_options(struct seq_file *s, struct vfsmount *mnt)
+static int ubifs_show_options(struct seq_file *s, struct dentry *root)
{
- struct ubifs_info *c = mnt->mnt_sb->s_fs_info;
+ struct ubifs_info *c = root->d_sb->s_fs_info;
if (c->mount_opts.unmount_mode == 2)
seq_printf(s, ",fast_unmount");
seq_printf(s, ",no_chk_data_crc");
if (c->mount_opts.override_compr) {
- seq_printf(s, ",compr=");
- seq_printf(s, ubifs_compr_name(c->mount_opts.compr_type));
+ seq_printf(s, ",compr=%s",
+ ubifs_compr_name(c->mount_opts.compr_type));
}
return 0;
{
int i, err;
struct ubifs_info *c = sb->s_fs_info;
- struct writeback_control wbc = {
- .sync_mode = WB_SYNC_ALL,
- .range_start = 0,
- .range_end = LLONG_MAX,
- .nr_to_write = LONG_MAX,
- };
/*
* Zero @wait is just an advisory thing to help the file system shove
if (!wait)
return 0;
- if (sb->s_flags & MS_RDONLY)
- return 0;
-
/*
* Synchronize write buffers, because 'ubifs_run_commit()' does not
* do this if it waits for an already running commit.
}
/*
- * VFS calls '->sync_fs()' before synchronizing all dirty inodes and
- * pages, so synchronize them first, then commit the journal. Strictly
- * speaking, it is not necessary to commit the journal here,
+ * Strictly speaking, it is not necessary to commit the journal here,
* synchronizing write-buffers would be enough. But committing makes
* UBIFS free space predictions much more accurate, so we want to let
* the user be able to get more accurate results of 'statfs()' after
* they synchronize the file system.
*/
- generic_sync_sb_inodes(sb, &wbc);
-
err = ubifs_run_commit(c);
if (err)
return err;
c->leb_cnt = c->vi.size;
c->leb_size = c->vi.usable_leb_size;
+ c->leb_start = c->di.leb_start;
c->half_leb_size = c->leb_size / 2;
c->min_io_size = c->di.min_io_size;
c->min_io_shift = fls(c->min_io_size) - 1;
+ c->max_write_size = c->di.max_write_size;
+ c->max_write_shift = fls(c->max_write_size) - 1;
if (c->leb_size < UBIFS_MIN_LEB_SZ) {
ubifs_err("too small LEBs (%d bytes), min. is %d bytes",
return -EINVAL;
}
+ /*
+ * Maximum write size has to be greater or equivalent to min. I/O
+ * size, and be multiple of min. I/O size.
+ */
+ if (c->max_write_size < c->min_io_size ||
+ c->max_write_size % c->min_io_size ||
+ !is_power_of_2(c->max_write_size)) {
+ ubifs_err("bad write buffer size %d for %d min. I/O unit",
+ c->max_write_size, c->min_io_size);
+ return -EINVAL;
+ }
+
/*
* UBIFS aligns all node to 8-byte boundary, so to make function in
* io.c simpler, assume minimum I/O unit size to be 8 bytes if it is
if (c->min_io_size < 8) {
c->min_io_size = 8;
c->min_io_shift = 3;
+ if (c->max_write_size < c->min_io_size) {
+ c->max_write_size = c->min_io_size;
+ c->max_write_shift = c->min_io_shift;
+ }
}
c->ref_node_alsz = ALIGN(UBIFS_REF_NODE_SZ, c->min_io_size);
tmp = UBIFS_CS_NODE_SZ + UBIFS_REF_NODE_SZ * c->jhead_cnt;
tmp = ALIGN(tmp, c->min_io_size);
if (tmp > c->leb_size) {
- dbg_err("too small LEB size %d, at least %d needed",
- c->leb_size, tmp);
+ ubifs_err("too small LEB size %d, at least %d needed",
+ c->leb_size, tmp);
return -EINVAL;
}
tmp /= c->leb_size;
tmp += 1;
if (c->log_lebs < tmp) {
- dbg_err("too small log %d LEBs, required min. %d LEBs",
- c->log_lebs, tmp);
+ ubifs_err("too small log %d LEBs, required min. %d LEBs",
+ c->log_lebs, tmp);
return -EINVAL;
}
* be compressed and direntries are of the maximum size.
*
* Note, data, which may be stored in inodes is budgeted separately, so
- * it is not included into 'c->inode_budget'.
+ * it is not included into 'c->bi.inode_budget'.
*/
- c->page_budget = UBIFS_MAX_DATA_NODE_SZ * UBIFS_BLOCKS_PER_PAGE;
- c->inode_budget = UBIFS_INO_NODE_SZ;
- c->dent_budget = UBIFS_MAX_DENT_NODE_SZ;
+ c->bi.page_budget = UBIFS_MAX_DATA_NODE_SZ * UBIFS_BLOCKS_PER_PAGE;
+ c->bi.inode_budget = UBIFS_INO_NODE_SZ;
+ c->bi.dent_budget = UBIFS_MAX_DENT_NODE_SZ;
/*
* When the amount of flash space used by buds becomes
if (err)
return err;
+ /* Initialize effective LEB size used in budgeting calculations */
+ c->idx_leb_size = c->leb_size - c->max_idx_node_sz;
return 0;
}
{
long long tmp64;
- c->min_idx_lebs = ubifs_calc_min_idx_lebs(c);
+ c->bi.min_idx_lebs = ubifs_calc_min_idx_lebs(c);
+ c->report_rp_size = ubifs_reported_space(c, c->rp_size);
/*
* Calculate total amount of FS blocks. This number is not used
c->jheads[i].wbuf.sync_callback = &bud_wbuf_callback;
c->jheads[i].wbuf.jhead = i;
+ c->jheads[i].grouped = 1;
}
- c->jheads[BASEHD].wbuf.dtype = UBI_SHORTTERM;
/*
- * Garbage Collector head likely contains long-term data and
- * does not need to be synchronized by timer.
+ * Garbage Collector head does not need to be synchronized by timer.
+ * Also GC head nodes are not grouped.
*/
- c->jheads[GCHD].wbuf.dtype = UBI_LONGTERM;
- c->jheads[GCHD].wbuf.timeout = 0;
+ c->jheads[GCHD].wbuf.no_timer = 1;
+ c->jheads[GCHD].grouped = 0;
return 0;
}
orph = list_entry(c->orph_list.next, struct ubifs_orphan, list);
list_del(&orph->list);
kfree(orph);
- dbg_err("orphan list not empty at unmount");
+ ubifs_err("orphan list not empty at unmount");
}
vfree(c->orph_buf);
c->empty = 1;
for (lnum = 0; lnum < c->leb_cnt; lnum++) {
- err = ubi_is_mapped(c->ubi, lnum);
+ err = ubifs_is_mapped(c, lnum);
if (unlikely(err < 0))
return err;
if (err == 1) {
{Opt_err, NULL},
};
+/**
+ * parse_standard_option - parse a standard mount option.
+ * @option: the option to parse
+ *
+ * Normally, standard mount options like "sync" are passed to file-systems as
+ * flags. However, when a "rootflags=" kernel boot parameter is used, they may
+ * be present in the options string. This function tries to deal with this
+ * situation and parse standard options. Returns 0 if the option was not
+ * recognized, and the corresponding integer flag if it was.
+ *
+ * UBIFS is only interested in the "sync" option, so do not check for anything
+ * else.
+ */
+static int parse_standard_option(const char *option)
+{
+ ubifs_msg("parse %s", option);
+ if (!strcmp(option, "sync"))
+ return MS_SYNCHRONOUS;
+ return 0;
+}
+
/**
* ubifs_parse_options - parse mount parameters.
* @c: UBIFS file-system description object
token = match_token(p, tokens, args);
switch (token) {
+ /*
+ * %Opt_fast_unmount and %Opt_norm_unmount options are ignored.
+ * We accept them in order to be backward-compatible. But this
+ * should be removed at some point.
+ */
case Opt_fast_unmount:
c->mount_opts.unmount_mode = 2;
- c->fast_unmount = 1;
break;
case Opt_norm_unmount:
c->mount_opts.unmount_mode = 1;
- c->fast_unmount = 0;
break;
case Opt_bulk_read:
c->mount_opts.bulk_read = 2;
break;
}
default:
- ubifs_err("unrecognized mount option \"%s\" "
- "or missing value", p);
- return -EINVAL;
+ {
+ unsigned long flag;
+ struct super_block *sb = c->vfs_sb;
+
+ flag = parse_standard_option(p);
+ if (!flag) {
+ ubifs_err("unrecognized mount option \"%s\" "
+ "or missing value", p);
+ return -EINVAL;
+ }
+ sb->s_flags |= flag;
+ break;
+ }
}
}
{
ubifs_assert(c->dark_wm > 0);
if (c->lst.total_free + c->lst.total_dirty < c->dark_wm) {
- ubifs_err("insufficient free space to mount in read/write mode");
- dbg_dump_budg(c);
- dbg_dump_lprops(c);
- /*
- * We return %-EINVAL instead of %-ENOSPC because it seems to
- * be the closest error code mentioned in the mount function
- * documentation.
- */
- return -EINVAL;
+ ubifs_err("insufficient free space to mount in R/W mode");
+ ubifs_dump_budg(c, &c->bi);
+ ubifs_dump_lprops(c);
+ return -ENOSPC;
}
return 0;
}
*/
static int mount_ubifs(struct ubifs_info *c)
{
- struct super_block *sb = c->vfs_sb;
- int err, mounted_read_only = (sb->s_flags & MS_RDONLY);
+ int err;
long long x;
size_t sz;
+ c->ro_mount = !!(c->vfs_sb->s_flags & MS_RDONLY);
err = init_constants_early(c);
if (err)
return err;
if (err)
goto out_free;
- if (c->empty && (mounted_read_only || c->ro_media)) {
+ if (c->empty && (c->ro_mount || c->ro_media)) {
/*
* This UBI volume is empty, and read-only, or the file system
* is mounted read-only - we cannot format it.
goto out_free;
}
- if (c->ro_media && !mounted_read_only) {
+ if (c->ro_media && !c->ro_mount) {
ubifs_err("cannot mount read-write - read-only media");
err = -EROFS;
goto out_free;
if (!c->sbuf)
goto out_free;
- if (!mounted_read_only) {
+ if (!c->ro_mount) {
c->ileb_buf = vmalloc(c->leb_size);
if (!c->ileb_buf)
goto out_free;
if (c->bulk_read == 1)
bu_init(c);
- /*
- * We have to check all CRCs, even for data nodes, when we mount the FS
- * (specifically, when we are replaying).
- */
- c->always_chk_crc = 1;
+ if (!c->ro_mount) {
+ c->write_reserve_buf = kmalloc(COMPRESSED_DATA_NODE_BUF_SZ,
+ GFP_KERNEL);
+ if (!c->write_reserve_buf)
+ goto out_free;
+ }
+
+ c->mounting = 1;
err = ubifs_read_superblock(c);
if (err)
if (!ubifs_compr_present(c->default_compr)) {
ubifs_err("'compressor \"%s\" is not compiled in",
ubifs_compr_name(c->default_compr));
+ err = -ENOTSUPP;
goto out_free;
}
goto out_free;
}
- sprintf(c->bgt_name, BGT_NAME_PATTERN, c->vi.ubi_num, c->vi.vol_id);
- if (!mounted_read_only) {
- err = alloc_wbufs(c);
- if (err)
- goto out_cbuf;
+ err = alloc_wbufs(c);
+ if (err)
+ goto out_cbuf;
+ sprintf(c->bgt_name, BGT_NAME_PATTERN, c->vi.ubi_num, c->vi.vol_id);
+ if (!c->ro_mount) {
/* Create background thread */
- c->bgt = kthread_create(ubifs_bg_thread, c, c->bgt_name);
+ c->bgt = kthread_create(ubifs_bg_thread, c, "%s", c->bgt_name);
if (IS_ERR(c->bgt)) {
err = PTR_ERR(c->bgt);
c->bgt = NULL;
if ((c->mst_node->flags & cpu_to_le32(UBIFS_MST_DIRTY)) != 0) {
ubifs_msg("recovery needed");
c->need_recovery = 1;
- if (!mounted_read_only) {
- err = ubifs_recover_inl_heads(c, c->sbuf);
- if (err)
- goto out_master;
- }
- } else if (!mounted_read_only) {
+ }
+
+ if (c->need_recovery && !c->ro_mount) {
+ err = ubifs_recover_inl_heads(c, c->sbuf);
+ if (err)
+ goto out_master;
+ }
+
+ err = ubifs_lpt_init(c, 1, !c->ro_mount);
+ if (err)
+ goto out_master;
+
+ if (!c->ro_mount && c->space_fixup) {
+ err = ubifs_fixup_free_space(c);
+ if (err)
+ goto out_lpt;
+ }
+
+ if (!c->ro_mount) {
/*
* Set the "dirty" flag so that if we reboot uncleanly we
* will notice this immediately on the next mount.
c->mst_node->flags |= cpu_to_le32(UBIFS_MST_DIRTY);
err = ubifs_write_master(c);
if (err)
- goto out_master;
+ goto out_lpt;
}
- err = ubifs_lpt_init(c, 1, !mounted_read_only);
- if (err)
- goto out_lpt;
-
- err = dbg_check_idx_size(c, c->old_idx_sz);
+ err = dbg_check_idx_size(c, c->bi.old_idx_sz);
if (err)
goto out_lpt;
if (err)
goto out_journal;
- err = ubifs_mount_orphans(c, c->need_recovery, mounted_read_only);
+ /* Calculate 'min_idx_lebs' after journal replay */
+ c->bi.min_idx_lebs = ubifs_calc_min_idx_lebs(c);
+
+ err = ubifs_mount_orphans(c, c->need_recovery, c->ro_mount);
if (err)
goto out_orphans;
- if (!mounted_read_only) {
+ if (!c->ro_mount) {
int lnum;
err = check_free_space(c);
if (err)
goto out_orphans;
err = ubifs_rcvry_gc_commit(c);
+ if (err)
+ goto out_orphans;
} else {
err = take_gc_lnum(c);
if (err)
*/
err = ubifs_leb_unmap(c, c->gc_lnum);
if (err)
- return err;
+ goto out_orphans;
}
err = dbg_check_lprops(c);
spin_unlock(&ubifs_infos_lock);
if (c->need_recovery) {
- if (mounted_read_only)
+ if (c->ro_mount)
ubifs_msg("recovery deferred");
else {
c->need_recovery = 0;
ubifs_msg("recovery completed");
+ /*
+ * GC LEB has to be empty and taken at this point. But
+ * the journal head LEBs may also be accounted as
+ * "empty taken" if they are empty.
+ */
+ ubifs_assert(c->lst.taken_empty_lebs > 0);
}
- }
+ } else
+ ubifs_assert(c->lst.taken_empty_lebs > 0);
- err = dbg_debugfs_init_fs(c);
+ err = dbg_check_filesystem(c);
if (err)
goto out_infos;
- err = dbg_check_filesystem(c);
+ err = dbg_debugfs_init_fs(c);
if (err)
goto out_infos;
- c->always_chk_crc = 0;
- /* GC LEB has to be empty and taken at this point */
- ubifs_assert(c->lst.taken_empty_lebs == 1);
+ c->mounting = 0;
ubifs_msg("mounted UBI device %d, volume %d, name \"%s\"",
c->vi.ubi_num, c->vi.vol_id, c->vi.name);
- if (mounted_read_only)
+ if (c->ro_mount)
ubifs_msg("mounted read-only");
x = (long long)c->main_lebs * c->leb_size;
ubifs_msg("file system size: %lld bytes (%lld KiB, %lld MiB, %d "
x = (long long)c->log_lebs * c->leb_size + c->max_bud_bytes;
ubifs_msg("journal size: %lld bytes (%lld KiB, %lld MiB, %d "
"LEBs)", x, x >> 10, x >> 20, c->log_lebs + c->max_bud_cnt);
- ubifs_msg("media format: %d (latest is %d)",
- c->fmt_version, UBIFS_FORMAT_VERSION);
+ ubifs_msg("media format: w%d/r%d (latest is w%d/r%d)",
+ c->fmt_version, c->ro_compat_version,
+ UBIFS_FORMAT_VERSION, UBIFS_RO_COMPAT_VERSION);
ubifs_msg("default compressor: %s", ubifs_compr_name(c->default_compr));
ubifs_msg("reserved for root: %llu bytes (%llu KiB)",
c->report_rp_size, c->report_rp_size >> 10);
dbg_msg("compiled on: " __DATE__ " at " __TIME__);
dbg_msg("min. I/O unit size: %d bytes", c->min_io_size);
+ dbg_msg("max. write size: %d bytes", c->max_write_size);
dbg_msg("LEB size: %d bytes (%d KiB)",
c->leb_size, c->leb_size >> 10);
dbg_msg("data journal heads: %d",
c->jhead_cnt - NONDATA_JHEADS_CNT);
- dbg_msg("UUID: %02X%02X%02X%02X-%02X%02X"
- "-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
- c->uuid[0], c->uuid[1], c->uuid[2], c->uuid[3],
- c->uuid[4], c->uuid[5], c->uuid[6], c->uuid[7],
- c->uuid[8], c->uuid[9], c->uuid[10], c->uuid[11],
- c->uuid[12], c->uuid[13], c->uuid[14], c->uuid[15]);
- dbg_msg("fast unmount: %d", c->fast_unmount);
+ dbg_msg("UUID: %pUB", c->uuid);
dbg_msg("big_lpt %d", c->big_lpt);
dbg_msg("log LEBs: %d (%d - %d)",
c->log_lebs, UBIFS_LOG_LNUM, c->log_last);
c->main_lebs, c->main_first, c->leb_cnt - 1);
dbg_msg("index LEBs: %d", c->lst.idx_lebs);
dbg_msg("total index bytes: %lld (%lld KiB, %lld MiB)",
- c->old_idx_sz, c->old_idx_sz >> 10, c->old_idx_sz >> 20);
+ c->bi.old_idx_sz, c->bi.old_idx_sz >> 10,
+ c->bi.old_idx_sz >> 20);
dbg_msg("key hash type: %d", c->key_hash_type);
dbg_msg("tree fanout: %d", c->fanout);
dbg_msg("reserved GC LEB: %d", c->gc_lnum);
UBIFS_TRUN_NODE_SZ, UBIFS_SB_NODE_SZ, UBIFS_MST_NODE_SZ);
dbg_msg("node sizes: ref %zu, cmt. start %zu, orph %zu",
UBIFS_REF_NODE_SZ, UBIFS_CS_NODE_SZ, UBIFS_ORPH_NODE_SZ);
- dbg_msg("max. node sizes: data %zu, inode %zu dentry %zu",
- UBIFS_MAX_DATA_NODE_SZ, UBIFS_MAX_INO_NODE_SZ,
- UBIFS_MAX_DENT_NODE_SZ);
+ dbg_msg("max. node sizes: data %zu, inode %zu dentry %zu, idx %d",
+ UBIFS_MAX_DATA_NODE_SZ, UBIFS_MAX_INO_NODE_SZ,
+ UBIFS_MAX_DENT_NODE_SZ, ubifs_idx_node_sz(c, c->fanout));
dbg_msg("dead watermark: %d", c->dead_wm);
dbg_msg("dark watermark: %d", c->dark_wm);
dbg_msg("LEB overhead: %d", c->leb_overhead);
out_cbuf:
kfree(c->cbuf);
out_free:
+ kfree(c->write_reserve_buf);
kfree(c->bu.buf);
vfree(c->ileb_buf);
vfree(c->sbuf);
kfree(c->cbuf);
kfree(c->rcvrd_mst_node);
kfree(c->mst_node);
+ kfree(c->write_reserve_buf);
kfree(c->bu.buf);
vfree(c->ileb_buf);
vfree(c->sbuf);
{
int err, lnum;
+ if (c->rw_incompat) {
+ ubifs_err("the file-system is not R/W-compatible");
+ ubifs_msg("on-flash format version is w%d/r%d, but software "
+ "only supports up to version w%d/r%d", c->fmt_version,
+ c->ro_compat_version, UBIFS_FORMAT_VERSION,
+ UBIFS_RO_COMPAT_VERSION);
+ return -EROFS;
+ }
+
mutex_lock(&c->umount_mutex);
dbg_save_space_info(c);
c->remounting_rw = 1;
- c->always_chk_crc = 1;
+ c->ro_mount = 0;
err = check_free_space(c);
if (err)
}
sup->leb_cnt = cpu_to_le32(c->leb_cnt);
err = ubifs_write_sb_node(c, sup);
+ kfree(sup);
if (err)
goto out;
}
err = ubifs_recover_inl_heads(c, c->sbuf);
if (err)
goto out;
+ } else {
+ /* A readonly mount is not allowed to have orphans */
+ ubifs_assert(c->tot_orphans == 0);
+ err = ubifs_clear_orphans(c);
+ if (err)
+ goto out;
}
if (!(c->mst_node->flags & cpu_to_le32(UBIFS_MST_DIRTY))) {
goto out;
}
- err = ubifs_lpt_init(c, 0, 1);
- if (err)
+ c->write_reserve_buf = kmalloc(COMPRESSED_DATA_NODE_BUF_SZ, GFP_KERNEL);
+ if (!c->write_reserve_buf)
goto out;
- err = alloc_wbufs(c);
+ err = ubifs_lpt_init(c, 0, 1);
if (err)
goto out;
- ubifs_create_buds_lists(c);
-
/* Create background thread */
- c->bgt = kthread_create(ubifs_bg_thread, c, c->bgt_name);
+ c->bgt = kthread_create(ubifs_bg_thread, c, "%s", c->bgt_name);
if (IS_ERR(c->bgt)) {
err = PTR_ERR(c->bgt);
c->bgt = NULL;
if (err)
goto out;
+ dbg_gen("re-mounted read-write");
+ c->remounting_rw = 0;
+
if (c->need_recovery) {
c->need_recovery = 0;
ubifs_msg("deferred recovery completed");
+ } else {
+ /*
+ * Do not run the debugging space check if the were doing
+ * recovery, because when we saved the information we had the
+ * file-system in a state where the TNC and lprops has been
+ * modified in memory, but all the I/O operations (including a
+ * commit) were deferred. So the file-system was in
+ * "non-committed" state. Now the file-system is in committed
+ * state, and of course the amount of free space will change
+ * because, for example, the old index size was imprecise.
+ */
+ err = dbg_check_space_info(c);
+ }
+
+ if (c->space_fixup) {
+ err = ubifs_fixup_free_space(c);
+ if (err)
+ goto out;
}
- dbg_gen("re-mounted read-write");
- c->vfs_sb->s_flags &= ~MS_RDONLY;
- c->remounting_rw = 0;
- c->always_chk_crc = 0;
- err = dbg_check_space_info(c);
mutex_unlock(&c->umount_mutex);
return err;
out:
+ c->ro_mount = 1;
vfree(c->orph_buf);
c->orph_buf = NULL;
if (c->bgt) {
c->bgt = NULL;
}
free_wbufs(c);
+ kfree(c->write_reserve_buf);
+ c->write_reserve_buf = NULL;
vfree(c->ileb_buf);
c->ileb_buf = NULL;
ubifs_lpt_free(c, 1);
c->remounting_rw = 0;
- c->always_chk_crc = 0;
mutex_unlock(&c->umount_mutex);
return err;
}
-/**
- * commit_on_unmount - commit the journal when un-mounting.
- * @c: UBIFS file-system description object
- *
- * This function is called during un-mounting and re-mounting, and it commits
- * the journal unless the "fast unmount" mode is enabled.
- */
-static void commit_on_unmount(struct ubifs_info *c)
-{
- long long bud_bytes;
-
- if (!c->fast_unmount) {
- dbg_gen("skip committing - fast unmount enabled");
- return;
- }
-
- /*
- * This function is called before the background thread is stopped, so
- * we may race with ongoing commit, which means we have to take
- * @c->bud_lock to access @c->bud_bytes.
- */
- spin_lock(&c->buds_lock);
- bud_bytes = c->bud_bytes;
- spin_unlock(&c->buds_lock);
-
- if (bud_bytes) {
- dbg_gen("run commit");
- ubifs_run_commit(c);
- } else
- dbg_gen("journal is empty, do not run commit");
-}
-
/**
* ubifs_remount_ro - re-mount in read-only mode.
* @c: UBIFS file-system description object
int i, err;
ubifs_assert(!c->need_recovery);
- ubifs_assert(!c->ro_media);
+ ubifs_assert(!c->ro_mount);
- commit_on_unmount(c);
mutex_lock(&c->umount_mutex);
if (c->bgt) {
kthread_stop(c->bgt);
dbg_save_space_info(c);
- for (i = 0; i < c->jhead_cnt; i++) {
+ for (i = 0; i < c->jhead_cnt; i++)
ubifs_wbuf_sync(&c->jheads[i].wbuf);
- del_timer_sync(&c->jheads[i].wbuf.timer);
- }
c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_DIRTY);
c->mst_node->flags |= cpu_to_le32(UBIFS_MST_NO_ORPHS);
if (err)
ubifs_ro_mode(c, err);
- err = ubifs_destroy_idx_gc(c);
- if (err)
- ubifs_ro_mode(c, err);
-
- free_wbufs(c);
vfree(c->orph_buf);
c->orph_buf = NULL;
+ kfree(c->write_reserve_buf);
+ c->write_reserve_buf = NULL;
vfree(c->ileb_buf);
c->ileb_buf = NULL;
ubifs_lpt_free(c, 1);
+ c->ro_mount = 1;
err = dbg_check_space_info(c);
if (err)
ubifs_ro_mode(c, err);
ubifs_msg("un-mount UBI device %d, volume %d", c->vi.ubi_num,
c->vi.vol_id);
+
/*
* The following asserts are only valid if there has not been a failure
* of the media. For example, there will be dirty inodes if we failed
* to write them back because of I/O errors.
*/
- ubifs_assert(atomic_long_read(&c->dirty_pg_cnt) == 0);
- ubifs_assert(c->budg_idx_growth == 0);
- ubifs_assert(c->budg_dd_growth == 0);
- ubifs_assert(c->budg_data_growth == 0);
+ if (!c->ro_error) {
+ ubifs_assert(c->bi.idx_growth == 0);
+ ubifs_assert(c->bi.dd_growth == 0);
+ ubifs_assert(c->bi.data_growth == 0);
+ }
/*
* The 'c->umount_lock' prevents races between UBIFS memory shrinker
* the mutex is locked.
*/
mutex_lock(&c->umount_mutex);
- if (!(c->vfs_sb->s_flags & MS_RDONLY)) {
+ if (!c->ro_mount) {
/*
* First of all kill the background thread to make sure it does
* not interfere with un-mounting and freeing resources.
c->bgt = NULL;
}
- /* Synchronize write-buffers */
- if (c->jheads)
- for (i = 0; i < c->jhead_cnt; i++) {
- ubifs_wbuf_sync(&c->jheads[i].wbuf);
- del_timer_sync(&c->jheads[i].wbuf.timer);
- }
-
/*
- * On fatal errors c->ro_media is set to 1, in which case we do
+ * On fatal errors c->ro_error is set to 1, in which case we do
* not write the master node.
*/
- if (!c->ro_media) {
+ if (!c->ro_error) {
+ int err;
+
+ /* Synchronize write-buffers */
+ for (i = 0; i < c->jhead_cnt; i++)
+ ubifs_wbuf_sync(&c->jheads[i].wbuf);
+
/*
* We are being cleanly unmounted which means the
* orphans were killed - indicate this in the master
* node. Also save the reserved GC LEB number.
*/
- int err;
-
c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_DIRTY);
c->mst_node->flags |= cpu_to_le32(UBIFS_MST_NO_ORPHS);
c->mst_node->gc_lnum = cpu_to_le32(c->gc_lnum);
*/
ubifs_err("failed to write master node, "
"error %d", err);
+ } else {
+ for (i = 0; i < c->jhead_cnt; i++)
+ /* Make sure write-buffer timers are canceled */
+ hrtimer_cancel(&c->jheads[i].wbuf.timer);
}
}
bdi_destroy(&c->bdi);
ubi_close_volume(c->ubi);
mutex_unlock(&c->umount_mutex);
- kfree(c);
}
static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
return err;
}
- if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
+ if (c->ro_mount && !(*flags & MS_RDONLY)) {
+ if (c->ro_error) {
+ ubifs_msg("cannot re-mount R/W due to prior errors");
+ return -EROFS;
+ }
if (c->ro_media) {
- ubifs_msg("cannot re-mount R/W, UBIFS is working in "
- "R/O mode");
- return -EINVAL;
+ ubifs_msg("cannot re-mount R/W - UBI volume is R/O");
+ return -EROFS;
}
err = ubifs_remount_rw(c);
if (err)
return err;
- } else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY))
+ } else if (!c->ro_mount && (*flags & MS_RDONLY)) {
+ if (c->ro_error) {
+ ubifs_msg("cannot re-mount R/O due to prior errors");
+ return -EROFS;
+ }
ubifs_remount_ro(c);
+ }
if (c->bulk_read == 1)
bu_init(c);
c->bu.buf = NULL;
}
- ubifs_assert(c->lst.taken_empty_lebs == 1);
+ ubifs_assert(c->lst.taken_empty_lebs > 0);
return 0;
}
.destroy_inode = ubifs_destroy_inode,
.put_super = ubifs_put_super,
.write_inode = ubifs_write_inode,
- .delete_inode = ubifs_delete_inode,
+ .evict_inode = ubifs_evict_inode,
.statfs = ubifs_statfs,
.dirty_inode = ubifs_dirty_inode,
.remount_fs = ubifs_remount_fs,
* @name: UBI volume name
* @mode: UBI volume open mode
*
- * There are several ways to specify UBI volumes when mounting UBIFS:
- * o ubiX_Y - UBI device number X, volume Y;
- * o ubiY - UBI device number 0, volume Y;
+ * The primary method of mounting UBIFS is by specifying the UBI volume
+ * character device node path. However, UBIFS may also be mounted withoug any
+ * character device node using one of the following methods:
+ *
+ * o ubiX_Y - mount UBI device number X, volume Y;
+ * o ubiY - mount UBI device number 0, volume Y;
* o ubiX:NAME - mount UBI device X, volume with name NAME;
* o ubi:NAME - mount UBI device 0, volume with name NAME.
*
* Alternative '!' separator may be used instead of ':' (because some shells
* like busybox may interpret ':' as an NFS host name separator). This function
- * returns ubi volume object in case of success and a negative error code in
- * case of failure.
+ * returns UBI volume description object in case of success and a negative
+ * error code in case of failure.
*/
static struct ubi_volume_desc *open_ubi(const char *name, int mode)
{
+ struct ubi_volume_desc *ubi;
int dev, vol;
char *endptr;
+ /* First, try to open using the device node path method */
+ ubi = ubi_open_volume_path(name, mode);
+ if (!IS_ERR(ubi))
+ return ubi;
+
+ /* Try the "nodev" method */
if (name[0] != 'u' || name[1] != 'b' || name[2] != 'i')
return ERR_PTR(-EINVAL);
return ERR_PTR(-EINVAL);
}
-static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
+static struct ubifs_info *alloc_ubifs_info(struct ubi_volume_desc *ubi)
{
- struct ubi_volume_desc *ubi = sb->s_fs_info;
struct ubifs_info *c;
- struct inode *root;
- int err;
c = kzalloc(sizeof(struct ubifs_info), GFP_KERNEL);
- if (!c)
- return -ENOMEM;
+ if (c) {
+ spin_lock_init(&c->cnt_lock);
+ spin_lock_init(&c->cs_lock);
+ spin_lock_init(&c->buds_lock);
+ spin_lock_init(&c->space_lock);
+ spin_lock_init(&c->orphan_lock);
+ init_rwsem(&c->commit_sem);
+ mutex_init(&c->lp_mutex);
+ mutex_init(&c->tnc_mutex);
+ mutex_init(&c->log_mutex);
+ mutex_init(&c->mst_mutex);
+ mutex_init(&c->umount_mutex);
+ mutex_init(&c->bu_mutex);
+ mutex_init(&c->write_reserve_mutex);
+ init_waitqueue_head(&c->cmt_wq);
+ c->buds = RB_ROOT;
+ c->old_idx = RB_ROOT;
+ c->size_tree = RB_ROOT;
+ c->orph_tree = RB_ROOT;
+ INIT_LIST_HEAD(&c->infos_list);
+ INIT_LIST_HEAD(&c->idx_gc);
+ INIT_LIST_HEAD(&c->replay_list);
+ INIT_LIST_HEAD(&c->replay_buds);
+ INIT_LIST_HEAD(&c->uncat_list);
+ INIT_LIST_HEAD(&c->empty_list);
+ INIT_LIST_HEAD(&c->freeable_list);
+ INIT_LIST_HEAD(&c->frdi_idx_list);
+ INIT_LIST_HEAD(&c->unclean_leb_list);
+ INIT_LIST_HEAD(&c->old_buds);
+ INIT_LIST_HEAD(&c->orph_list);
+ INIT_LIST_HEAD(&c->orph_new);
+ c->no_chk_data_crc = 1;
+
+ c->highest_inum = UBIFS_FIRST_INO;
+ c->lhead_lnum = c->ltail_lnum = UBIFS_LOG_LNUM;
+
+ ubi_get_volume_info(ubi, &c->vi);
+ ubi_get_device_info(c->vi.ubi_num, &c->di);
+ }
+ return c;
+}
- spin_lock_init(&c->cnt_lock);
- spin_lock_init(&c->cs_lock);
- spin_lock_init(&c->buds_lock);
- spin_lock_init(&c->space_lock);
- spin_lock_init(&c->orphan_lock);
- init_rwsem(&c->commit_sem);
- mutex_init(&c->lp_mutex);
- mutex_init(&c->tnc_mutex);
- mutex_init(&c->log_mutex);
- mutex_init(&c->mst_mutex);
- mutex_init(&c->umount_mutex);
- mutex_init(&c->bu_mutex);
- init_waitqueue_head(&c->cmt_wq);
- c->buds = RB_ROOT;
- c->old_idx = RB_ROOT;
- c->size_tree = RB_ROOT;
- c->orph_tree = RB_ROOT;
- INIT_LIST_HEAD(&c->infos_list);
- INIT_LIST_HEAD(&c->idx_gc);
- INIT_LIST_HEAD(&c->replay_list);
- INIT_LIST_HEAD(&c->replay_buds);
- INIT_LIST_HEAD(&c->uncat_list);
- INIT_LIST_HEAD(&c->empty_list);
- INIT_LIST_HEAD(&c->freeable_list);
- INIT_LIST_HEAD(&c->frdi_idx_list);
- INIT_LIST_HEAD(&c->unclean_leb_list);
- INIT_LIST_HEAD(&c->old_buds);
- INIT_LIST_HEAD(&c->orph_list);
- INIT_LIST_HEAD(&c->orph_new);
-
- c->highest_inum = UBIFS_FIRST_INO;
- c->lhead_lnum = c->ltail_lnum = UBIFS_LOG_LNUM;
-
- ubi_get_volume_info(ubi, &c->vi);
- ubi_get_device_info(c->vi.ubi_num, &c->di);
+static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct ubifs_info *c = sb->s_fs_info;
+ struct inode *root;
+ int err;
+ c->vfs_sb = sb;
/* Re-open the UBI device in read-write mode */
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READWRITE);
if (IS_ERR(c->ubi)) {
err = PTR_ERR(c->ubi);
- goto out_free;
+ goto out;
}
/*
*
* Read-ahead will be disabled because @c->bdi.ra_pages is 0.
*/
+ c->bdi.name = "ubifs",
c->bdi.capabilities = BDI_CAP_MAP_COPY;
- c->bdi.unplug_io_fn = default_unplug_io_fn;
err = bdi_init(&c->bdi);
if (err)
goto out_close;
+ err = bdi_register(&c->bdi, NULL, "ubifs_%d_%d",
+ c->vi.ubi_num, c->vi.vol_id);
+ if (err)
+ goto out_bdi;
err = ubifs_parse_options(c, data, 0);
if (err)
goto out_bdi;
- c->vfs_sb = sb;
-
+ sb->s_bdi = &c->bdi;
sb->s_fs_info = c;
sb->s_magic = UBIFS_SUPER_MAGIC;
sb->s_blocksize = UBIFS_BLOCK_SIZE;
sb->s_blocksize_bits = UBIFS_BLOCK_SHIFT;
- sb->s_dev = c->vi.cdev;
sb->s_maxbytes = c->max_inode_sz = key_max_inode_size(c);
if (c->max_inode_sz > MAX_LFS_FILESIZE)
sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE;
goto out_umount;
}
- sb->s_root = d_alloc_root(root);
+ sb->s_root = d_make_root(root);
if (!sb->s_root)
- goto out_iput;
+ goto out_umount;
mutex_unlock(&c->umount_mutex);
return 0;
-out_iput:
- iput(root);
out_umount:
ubifs_umount(c);
out_unlock:
bdi_destroy(&c->bdi);
out_close:
ubi_close_volume(c->ubi);
-out_free:
- kfree(c);
+out:
return err;
}
static int sb_test(struct super_block *sb, void *data)
{
- dev_t *dev = data;
+ struct ubifs_info *c1 = data;
+ struct ubifs_info *c = sb->s_fs_info;
- return sb->s_dev == *dev;
+ return c->vi.cdev == c1->vi.cdev;
}
static int sb_set(struct super_block *sb, void *data)
{
- dev_t *dev = data;
-
- sb->s_dev = *dev;
- return 0;
+ sb->s_fs_info = data;
+ return set_anon_super(sb, NULL);
}
-static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
- const char *name, void *data, struct vfsmount *mnt)
+static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
+ const char *name, void *data)
{
struct ubi_volume_desc *ubi;
- struct ubi_volume_info vi;
+ struct ubifs_info *c;
struct super_block *sb;
int err;
if (IS_ERR(ubi)) {
ubifs_err("cannot open \"%s\", error %d",
name, (int)PTR_ERR(ubi));
- return PTR_ERR(ubi);
+ return ERR_CAST(ubi);
+ }
+
+ c = alloc_ubifs_info(ubi);
+ if (!c) {
+ err = -ENOMEM;
+ goto out_close;
}
- ubi_get_volume_info(ubi, &vi);
- dbg_gen("opened ubi%d_%d", vi.ubi_num, vi.vol_id);
+ dbg_gen("opened ubi%d_%d", c->vi.ubi_num, c->vi.vol_id);
- sb = sget(fs_type, &sb_test, &sb_set, &vi.cdev);
+ sb = sget(fs_type, sb_test, sb_set, c);
if (IS_ERR(sb)) {
err = PTR_ERR(sb);
+ kfree(c);
goto out_close;
}
if (sb->s_root) {
+ struct ubifs_info *c1 = sb->s_fs_info;
+ kfree(c);
/* A new mount point for already mounted UBIFS */
dbg_gen("this ubi volume is already mounted");
- if ((flags ^ sb->s_flags) & MS_RDONLY) {
+ if (!!(flags & MS_RDONLY) != c1->ro_mount) {
err = -EBUSY;
goto out_deact;
}
} else {
sb->s_flags = flags;
- /*
- * Pass 'ubi' to 'fill_super()' in sb->s_fs_info where it is
- * replaced by 'c'.
- */
- sb->s_fs_info = ubi;
err = ubifs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
if (err)
goto out_deact;
/* 'fill_super()' opens ubi again so we must close it here */
ubi_close_volume(ubi);
- return simple_set_mnt(mnt, sb);
+ return dget(sb->s_root);
out_deact:
- up_write(&sb->s_umount);
- deactivate_super(sb);
+ deactivate_locked_super(sb);
out_close:
ubi_close_volume(ubi);
- return err;
+ return ERR_PTR(err);
}
-static void ubifs_kill_sb(struct super_block *sb)
+static void kill_ubifs_super(struct super_block *s)
{
- struct ubifs_info *c = sb->s_fs_info;
-
- /*
- * We do 'commit_on_unmount()' here instead of 'ubifs_put_super()'
- * in order to be outside BKL.
- */
- if (sb->s_root && !(sb->s_flags & MS_RDONLY))
- commit_on_unmount(c);
- /* The un-mount routine is actually done in put_super() */
- generic_shutdown_super(sb);
+ struct ubifs_info *c = s->s_fs_info;
+ kill_anon_super(s);
+ kfree(c);
}
static struct file_system_type ubifs_fs_type = {
.name = "ubifs",
.owner = THIS_MODULE,
- .get_sb = ubifs_get_sb,
- .kill_sb = ubifs_kill_sb
+ .mount = ubifs_mount,
+ .kill_sb = kill_ubifs_super,
};
/*
return -EINVAL;
}
- err = register_filesystem(&ubifs_fs_type);
- if (err) {
- ubifs_err("cannot register file system, error %d", err);
- return err;
- }
-
- err = -ENOMEM;
ubifs_inode_slab = kmem_cache_create("ubifs_inode_slab",
sizeof(struct ubifs_inode), 0,
SLAB_MEM_SPREAD | SLAB_RECLAIM_ACCOUNT,
&inode_slab_ctor);
if (!ubifs_inode_slab)
- goto out_reg;
+ return -ENOMEM;
register_shrinker(&ubifs_shrinker_info);
if (err)
goto out_compr;
+ err = register_filesystem(&ubifs_fs_type);
+ if (err) {
+ ubifs_err("cannot register file system, error %d", err);
+ goto out_dbg;
+ }
return 0;
+out_dbg:
+ dbg_debugfs_exit();
out_compr:
ubifs_compressors_exit();
out_shrinker:
unregister_shrinker(&ubifs_shrinker_info);
kmem_cache_destroy(ubifs_inode_slab);
-out_reg:
- unregister_filesystem(&ubifs_fs_type);
return err;
}
/* late_initcall to let compressors initialize first */