#include <linux/string.h>
#include <linux/fs.h>
#include <linux/time.h>
+#include <linux/vmalloc.h>
#include <linux/jbd2.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/quotaops.h>
#include <linux/seq_file.h>
#include <linux/proc_fs.h>
+#include <linux/ctype.h>
#include <linux/marker.h>
#include <linux/log2.h>
#include <linux/crc16.h>
#include "group.h"
struct proc_dir_entry *ext4_proc_root;
+static struct kset *ext4_kset;
static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
unsigned long journal_devnum);
-static int ext4_commit_super(struct super_block *sb,
- struct ext4_super_block *es, int sync);
+static int ext4_commit_super(struct super_block *sb, int sync);
static void ext4_mark_recovery_complete(struct super_block *sb,
struct ext4_super_block *es);
static void ext4_clear_journal_err(struct super_block *sb,
printk(KERN_CRIT "Remounting filesystem read-only\n");
sb->s_flags |= MS_RDONLY;
}
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
if (test_opt(sb, ERRORS_PANIC))
panic("EXT4-fs (device %s): panic forced after error\n",
sb->s_id);
if (test_opt(sb, ERRORS_CONT)) {
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
- ext4_commit_super(sb, es, 0);
+ ext4_commit_super(sb, 0);
return;
}
ext4_unlock_group(sb, grp);
if (!(sb->s_flags & MS_RDONLY)) {
EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
es->s_state = cpu_to_le16(sbi->s_mount_state);
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
}
if (sbi->s_proc) {
- remove_proc_entry("inode_readahead_blks", sbi->s_proc);
remove_proc_entry(sb->s_id, ext4_proc_root);
}
+ kobject_del(&sbi->s_kobj);
for (i = 0; i < sbi->s_gdb_count; i++)
brelse(sbi->s_group_desc[i]);
kfree(sbi->s_group_desc);
- kfree(sbi->s_flex_groups);
+ if (is_vmalloc_addr(sbi->s_flex_groups))
+ vfree(sbi->s_flex_groups);
+ else
+ kfree(sbi->s_flex_groups);
percpu_counter_destroy(&sbi->s_freeblocks_counter);
percpu_counter_destroy(&sbi->s_freeinodes_counter);
percpu_counter_destroy(&sbi->s_dirs_counter);
ext4_blkdev_remove(sbi);
}
sb->s_fs_info = NULL;
+ /*
+ * Now that we are completely done shutting down the
+ * superblock, we need to actually destroy the kobject.
+ */
+ unlock_kernel();
+ unlock_super(sb);
+ kobject_put(&sbi->s_kobj);
+ wait_for_completion(&sbi->s_kobj_unregister);
+ lock_super(sb);
+ lock_kernel();
+ kfree(sbi->s_blockgroup_lock);
kfree(sbi);
return;
}
if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL))
seq_puts(seq, ",noacl");
#endif
- if (!test_opt(sb, RESERVATION))
- seq_puts(seq, ",noreservation");
if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) {
seq_printf(seq, ",commit=%u",
(unsigned) (sbi->s_commit_interval / HZ));
if (test_opt(sb, DATA_ERR_ABORT))
seq_puts(seq, ",data_err=abort");
+ if (test_opt(sb, NO_AUTO_DA_ALLOC))
+ seq_puts(seq, ",noauto_da_alloc");
+
ext4_show_quota_options(seq, sb);
return 0;
}
#define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group")
#define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
-static int ext4_dquot_initialize(struct inode *inode, int type);
-static int ext4_dquot_drop(struct inode *inode);
static int ext4_write_dquot(struct dquot *dquot);
static int ext4_acquire_dquot(struct dquot *dquot);
static int ext4_release_dquot(struct dquot *dquot);
const char *data, size_t len, loff_t off);
static struct dquot_operations ext4_quota_operations = {
- .initialize = ext4_dquot_initialize,
- .drop = ext4_dquot_drop,
+ .initialize = dquot_initialize,
+ .drop = dquot_drop,
.alloc_space = dquot_alloc_space,
+ .reserve_space = dquot_reserve_space,
+ .claim_space = dquot_claim_space,
+ .release_rsv = dquot_release_reserved_space,
+ .get_reserved_space = ext4_get_reserved_space,
.alloc_inode = dquot_alloc_inode,
.free_space = dquot_free_space,
.free_inode = dquot_free_inode,
.dirty_inode = ext4_dirty_inode,
.delete_inode = ext4_delete_inode,
.put_super = ext4_put_super,
- .write_super = ext4_write_super,
.sync_fs = ext4_sync_fs,
.freeze_fs = ext4_freeze,
.unfreeze_fs = ext4_unfreeze,
.bdev_try_to_free_page = bdev_try_to_free_page,
};
+static const struct super_operations ext4_nojournal_sops = {
+ .alloc_inode = ext4_alloc_inode,
+ .destroy_inode = ext4_destroy_inode,
+ .write_inode = ext4_write_inode,
+ .dirty_inode = ext4_dirty_inode,
+ .delete_inode = ext4_delete_inode,
+ .write_super = ext4_write_super,
+ .put_super = ext4_put_super,
+ .statfs = ext4_statfs,
+ .remount_fs = ext4_remount,
+ .clear_inode = ext4_clear_inode,
+ .show_options = ext4_show_options,
+#ifdef CONFIG_QUOTA
+ .quota_read = ext4_quota_read,
+ .quota_write = ext4_quota_write,
+#endif
+ .bdev_try_to_free_page = bdev_try_to_free_page,
+};
+
static const struct export_operations ext4_export_ops = {
.fh_to_dentry = ext4_fh_to_dentry,
.fh_to_parent = ext4_fh_to_parent,
Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov,
Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
- Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
+ Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh,
Opt_commit, Opt_min_batch_time, Opt_max_batch_time,
Opt_journal_update, Opt_journal_dev,
Opt_journal_checksum, Opt_journal_async_commit,
Opt_data_err_abort, Opt_data_err_ignore,
Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
- Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
- Opt_grpquota, Opt_i_version,
+ Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize,
+ Opt_usrquota, Opt_grpquota, Opt_i_version,
Opt_stripe, Opt_delalloc, Opt_nodelalloc,
Opt_inode_readahead_blks, Opt_journal_ioprio
};
{Opt_nouser_xattr, "nouser_xattr"},
{Opt_acl, "acl"},
{Opt_noacl, "noacl"},
- {Opt_reservation, "reservation"},
- {Opt_noreservation, "noreservation"},
{Opt_noload, "noload"},
{Opt_nobh, "nobh"},
{Opt_bh, "bh"},
{Opt_quota, "quota"},
{Opt_usrquota, "usrquota"},
{Opt_barrier, "barrier=%u"},
+ {Opt_barrier, "barrier"},
+ {Opt_nobarrier, "nobarrier"},
{Opt_i_version, "i_version"},
{Opt_stripe, "stripe=%u"},
{Opt_resize, "resize"},
{Opt_nodelalloc, "nodelalloc"},
{Opt_inode_readahead_blks, "inode_readahead_blks=%u"},
{Opt_journal_ioprio, "journal_ioprio=%u"},
+ {Opt_auto_da_alloc, "auto_da_alloc=%u"},
+ {Opt_auto_da_alloc, "auto_da_alloc"},
+ {Opt_noauto_da_alloc, "noauto_da_alloc"},
{Opt_err, NULL},
};
"not supported\n");
break;
#endif
- case Opt_reservation:
- set_opt(sbi->s_mount_opt, RESERVATION);
- break;
- case Opt_noreservation:
- clear_opt(sbi->s_mount_opt, RESERVATION);
- break;
case Opt_journal_update:
/* @@@ FIXME */
/* Eventually we will want to be able to create
case Opt_abort:
set_opt(sbi->s_mount_opt, ABORT);
break;
+ case Opt_nobarrier:
+ clear_opt(sbi->s_mount_opt, BARRIER);
+ break;
case Opt_barrier:
- if (match_int(&args[0], &option))
- return 0;
+ if (match_int(&args[0], &option)) {
+ set_opt(sbi->s_mount_opt, BARRIER);
+ break;
+ }
if (option)
set_opt(sbi->s_mount_opt, BARRIER);
else
return 0;
if (option < 0 || option > (1 << 30))
return 0;
+ if (!is_power_of_2(option)) {
+ printk(KERN_ERR "EXT4-fs: inode_readahead_blks"
+ " must be a power of 2\n");
+ return 0;
+ }
sbi->s_inode_readahead_blks = option;
break;
case Opt_journal_ioprio:
*journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE,
option);
break;
+ case Opt_noauto_da_alloc:
+ set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC);
+ break;
+ case Opt_auto_da_alloc:
+ if (match_int(&args[0], &option)) {
+ clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC);
+ break;
+ }
+ if (option)
+ clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC);
+ else
+ set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC);
+ break;
default:
printk(KERN_ERR
"EXT4-fs: Unrecognized mount option \"%s\" "
if (sbi->s_journal)
EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
if (test_opt(sb, DEBUG))
printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, "
"bpg=%lu, ipg=%lu, mo=%04lx]\n",
ext4_group_t flex_group_count;
ext4_group_t flex_group;
int groups_per_flex = 0;
+ size_t size;
int i;
if (!sbi->s_es->s_log_groups_per_flex) {
flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) +
((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) <<
EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex;
- sbi->s_flex_groups = kzalloc(flex_group_count *
- sizeof(struct flex_groups), GFP_KERNEL);
+ size = flex_group_count * sizeof(struct flex_groups);
+ sbi->s_flex_groups = kzalloc(size, GFP_KERNEL);
+ if (sbi->s_flex_groups == NULL) {
+ sbi->s_flex_groups = vmalloc(size);
+ if (sbi->s_flex_groups)
+ memset(sbi->s_flex_groups, 0, size);
+ }
if (sbi->s_flex_groups == NULL) {
printk(KERN_ERR "EXT4-fs: not enough memory for "
"%u flex groups\n", flex_group_count);
gdp = ext4_get_group_desc(sb, i, &bh);
flex_group = ext4_flex_group(sbi, i);
- sbi->s_flex_groups[flex_group].free_inodes +=
- ext4_free_inodes_count(sb, gdp);
- sbi->s_flex_groups[flex_group].free_blocks +=
- ext4_free_blks_count(sb, gdp);
+ atomic_set(&sbi->s_flex_groups[flex_group].free_inodes,
+ ext4_free_inodes_count(sb, gdp));
+ atomic_set(&sbi->s_flex_groups[flex_group].free_blocks,
+ ext4_free_blks_count(sb, gdp));
+ atomic_set(&sbi->s_flex_groups[flex_group].used_dirs,
+ ext4_used_dirs_count(sb, gdp));
}
return 1;
}
list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);
- DQUOT_INIT(inode);
+ vfs_dq_init(inode);
if (inode->i_nlink) {
printk(KERN_DEBUG
"%s: truncating inode %lu to %lld bytes\n",
return 0;
}
+/* sysfs supprt */
+
+struct ext4_attr {
+ struct attribute attr;
+ ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *);
+ ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *,
+ const char *, size_t);
+ int offset;
+};
+
+static int parse_strtoul(const char *buf,
+ unsigned long max, unsigned long *value)
+{
+ char *endp;
+
+ while (*buf && isspace(*buf))
+ buf++;
+ *value = simple_strtoul(buf, &endp, 0);
+ while (*endp && isspace(*endp))
+ endp++;
+ if (*endp || *value > max)
+ return -EINVAL;
+
+ return 0;
+}
+
+static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a,
+ struct ext4_sb_info *sbi,
+ char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%llu\n",
+ (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter));
+}
+
+static ssize_t session_write_kbytes_show(struct ext4_attr *a,
+ struct ext4_sb_info *sbi, char *buf)
+{
+ struct super_block *sb = sbi->s_buddy_cache->i_sb;
+
+ return snprintf(buf, PAGE_SIZE, "%lu\n",
+ (part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
+ sbi->s_sectors_written_start) >> 1);
+}
+
+static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a,
+ struct ext4_sb_info *sbi, char *buf)
+{
+ struct super_block *sb = sbi->s_buddy_cache->i_sb;
+
+ return snprintf(buf, PAGE_SIZE, "%llu\n",
+ sbi->s_kbytes_written +
+ ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
+ EXT4_SB(sb)->s_sectors_written_start) >> 1));
+}
+
+static ssize_t inode_readahead_blks_store(struct ext4_attr *a,
+ struct ext4_sb_info *sbi,
+ const char *buf, size_t count)
+{
+ unsigned long t;
+
+ if (parse_strtoul(buf, 0x40000000, &t))
+ return -EINVAL;
+
+ if (!is_power_of_2(t))
+ return -EINVAL;
+
+ sbi->s_inode_readahead_blks = t;
+ return count;
+}
+
+static ssize_t sbi_ui_show(struct ext4_attr *a,
+ struct ext4_sb_info *sbi, char *buf)
+{
+ unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset);
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
+}
+
+static ssize_t sbi_ui_store(struct ext4_attr *a,
+ struct ext4_sb_info *sbi,
+ const char *buf, size_t count)
+{
+ unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset);
+ unsigned long t;
+
+ if (parse_strtoul(buf, 0xffffffff, &t))
+ return -EINVAL;
+ *ui = t;
+ return count;
+}
+
+#define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \
+static struct ext4_attr ext4_attr_##_name = { \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
+ .show = _show, \
+ .store = _store, \
+ .offset = offsetof(struct ext4_sb_info, _elname), \
+}
+#define EXT4_ATTR(name, mode, show, store) \
+static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store)
+
+#define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL)
+#define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store)
+#define EXT4_RW_ATTR_SBI_UI(name, elname) \
+ EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname)
+#define ATTR_LIST(name) &ext4_attr_##name.attr
+
+EXT4_RO_ATTR(delayed_allocation_blocks);
+EXT4_RO_ATTR(session_write_kbytes);
+EXT4_RO_ATTR(lifetime_write_kbytes);
+EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show,
+ inode_readahead_blks_store, s_inode_readahead_blks);
+EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats);
+EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan);
+EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);
+EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs);
+EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request);
+EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc);
+
+static struct attribute *ext4_attrs[] = {
+ ATTR_LIST(delayed_allocation_blocks),
+ ATTR_LIST(session_write_kbytes),
+ ATTR_LIST(lifetime_write_kbytes),
+ ATTR_LIST(inode_readahead_blks),
+ ATTR_LIST(mb_stats),
+ ATTR_LIST(mb_max_to_scan),
+ ATTR_LIST(mb_min_to_scan),
+ ATTR_LIST(mb_order2_req),
+ ATTR_LIST(mb_stream_req),
+ ATTR_LIST(mb_group_prealloc),
+ NULL,
+};
+
+static ssize_t ext4_attr_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
+ s_kobj);
+ struct ext4_attr *a = container_of(attr, struct ext4_attr, attr);
+
+ return a->show ? a->show(a, sbi, buf) : 0;
+}
+
+static ssize_t ext4_attr_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buf, size_t len)
+{
+ struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
+ s_kobj);
+ struct ext4_attr *a = container_of(attr, struct ext4_attr, attr);
+
+ return a->store ? a->store(a, sbi, buf, len) : 0;
+}
+
+static void ext4_sb_release(struct kobject *kobj)
+{
+ struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
+ s_kobj);
+ complete(&sbi->s_kobj_unregister);
+}
+
+
+static struct sysfs_ops ext4_attr_ops = {
+ .show = ext4_attr_show,
+ .store = ext4_attr_store,
+};
+
+static struct kobj_type ext4_ktype = {
+ .default_attrs = ext4_attrs,
+ .sysfs_ops = &ext4_attr_ops,
+ .release = ext4_sb_release,
+};
+
static int ext4_fill_super(struct super_block *sb, void *data, int silent)
__releases(kernel_lock)
__acquires(kernel_lock)
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
+
+ sbi->s_blockgroup_lock =
+ kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
+ if (!sbi->s_blockgroup_lock) {
+ kfree(sbi);
+ return -ENOMEM;
+ }
sb->s_fs_info = sbi;
sbi->s_mount_opt = 0;
sbi->s_resuid = EXT4_DEF_RESUID;
sbi->s_resgid = EXT4_DEF_RESGID;
sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
sbi->s_sb_block = sb_block;
+ sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part,
+ sectors[1]);
unlock_kernel();
sb->s_magic = le16_to_cpu(es->s_magic);
if (sb->s_magic != EXT4_SUPER_MAGIC)
goto cantfind_ext4;
+ sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written);
/* Set defaults before we parse the mount options */
def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME;
sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME;
- set_opt(sbi->s_mount_opt, RESERVATION);
set_opt(sbi->s_mount_opt, BARRIER);
/*
if (EXT4_BLOCKS_PER_GROUP(sb) == 0)
goto cantfind_ext4;
+ /* check blocks count against device size */
+ blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
+ if (blocks_count && ext4_blocks_count(es) > blocks_count) {
+ printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu "
+ "exceeds size of device (%llu blocks)\n",
+ ext4_blocks_count(es), blocks_count);
+ goto failed_mount;
+ }
+
/*
* It makes no sense for the first data block to be beyond the end
* of the filesystem.
#ifdef CONFIG_PROC_FS
if (ext4_proc_root)
sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root);
-
- if (sbi->s_proc)
- proc_create_data("inode_readahead_blks", 0644, sbi->s_proc,
- &ext4_ui_proc_fops,
- &sbi->s_inode_readahead_blks);
#endif
- bgl_lock_init(&sbi->s_blockgroup_lock);
+ bgl_lock_init(sbi->s_blockgroup_lock);
for (i = 0; i < db_count; i++) {
block = descriptor_loc(sb, logical_sb_block, i);
/*
* set up enough so that it can read an inode
*/
- sb->s_op = &ext4_sops;
+ if (!test_opt(sb, NOLOAD) &&
+ EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL))
+ sb->s_op = &ext4_sops;
+ else
+ sb->s_op = &ext4_nojournal_sops;
sb->s_export_op = &ext4_export_ops;
sb->s_xattr = ext4_xattr_handlers;
#ifdef CONFIG_QUOTA
if (test_opt(sb, ERRORS_PANIC)) {
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
goto failed_mount4;
}
}
goto failed_mount4;
}
+ sbi->s_kobj.kset = ext4_kset;
+ init_completion(&sbi->s_kobj_unregister);
+ err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL,
+ "%s", sb->s_id);
+ if (err) {
+ ext4_mb_release(sb);
+ ext4_ext_release(sb);
+ goto failed_mount4;
+ };
+
/*
* akpm: core read_super() calls in here with the superblock locked.
* That deadlocks, because orphan cleanup needs to lock the superblock
sbi->s_journal = NULL;
}
failed_mount3:
+ if (sbi->s_flex_groups) {
+ if (is_vmalloc_addr(sbi->s_flex_groups))
+ vfree(sbi->s_flex_groups);
+ else
+ kfree(sbi->s_flex_groups);
+ }
percpu_counter_destroy(&sbi->s_freeblocks_counter);
percpu_counter_destroy(&sbi->s_freeinodes_counter);
percpu_counter_destroy(&sbi->s_dirs_counter);
kfree(sbi->s_group_desc);
failed_mount:
if (sbi->s_proc) {
- remove_proc_entry("inode_readahead_blks", sbi->s_proc);
remove_proc_entry(sb->s_id, ext4_proc_root);
}
#ifdef CONFIG_QUOTA
if (journal_devnum &&
journal_devnum != le32_to_cpu(es->s_journal_dev)) {
es->s_journal_dev = cpu_to_le32(journal_devnum);
- sb->s_dirt = 1;
/* Make sure we flush the recovery flag to disk. */
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
}
return 0;
}
-static int ext4_commit_super(struct super_block *sb,
- struct ext4_super_block *es, int sync)
+static int ext4_commit_super(struct super_block *sb, int sync)
{
+ struct ext4_super_block *es = EXT4_SB(sb)->s_es;
struct buffer_head *sbh = EXT4_SB(sb)->s_sbh;
int error = 0;
set_buffer_uptodate(sbh);
}
es->s_wtime = cpu_to_le32(get_seconds());
+ es->s_kbytes_written =
+ cpu_to_le64(EXT4_SB(sb)->s_kbytes_written +
+ ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
+ EXT4_SB(sb)->s_sectors_written_start) >> 1));
ext4_free_blocks_count_set(es, percpu_counter_sum_positive(
&EXT4_SB(sb)->s_freeblocks_counter));
es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive(
&EXT4_SB(sb)->s_freeinodes_counter));
-
+ sb->s_dirt = 0;
BUFFER_TRACE(sbh, "marking dirty");
mark_buffer_dirty(sbh);
if (sync) {
if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) &&
sb->s_flags & MS_RDONLY) {
EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
- sb->s_dirt = 0;
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
}
unlock_super(sb);
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
jbd2_journal_clear_err(journal);
}
return 0;
journal = EXT4_SB(sb)->s_journal;
- if (journal) {
- sb->s_dirt = 0;
+ if (journal)
ret = ext4_journal_force_commit(journal);
- }
return ret;
}
-/*
- * Ext4 always journals updates to the superblock itself, so we don't
- * have to propagate any other updates to the superblock on disk at this
- * point. (We can probably nuke this function altogether, and remove
- * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...)
- */
static void ext4_write_super(struct super_block *sb)
{
- if (EXT4_SB(sb)->s_journal) {
- if (mutex_trylock(&sb->s_lock) != 0)
- BUG();
- sb->s_dirt = 0;
- } else {
- ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
- }
+ ext4_commit_super(sb, 1);
}
static int ext4_sync_fs(struct super_block *sb, int wait)
tid_t target;
trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait);
- sb->s_dirt = 0;
- if (EXT4_SB(sb)->s_journal) {
- if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal,
- &target)) {
- if (wait)
- jbd2_log_wait_commit(EXT4_SB(sb)->s_journal,
- target);
- }
- } else {
- ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait);
+ if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) {
+ if (wait)
+ jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target);
}
return ret;
}
{
int error = 0;
journal_t *journal;
- sb->s_dirt = 0;
- if (!(sb->s_flags & MS_RDONLY)) {
- journal = EXT4_SB(sb)->s_journal;
+ if (sb->s_flags & MS_RDONLY)
+ return 0;
- if (journal) {
- /* Now we set up the journal barrier. */
- jbd2_journal_lock_updates(journal);
+ journal = EXT4_SB(sb)->s_journal;
- /*
- * We don't want to clear needs_recovery flag when we
- * failed to flush the journal.
- */
- error = jbd2_journal_flush(journal);
- if (error < 0)
- goto out;
- }
+ /* Now we set up the journal barrier. */
+ jbd2_journal_lock_updates(journal);
- /* Journal blocked and flushed, clear needs_recovery flag. */
- EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
- error = ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
- if (error)
- goto out;
+ /*
+ * Don't clear the needs_recovery flag if we failed to flush
+ * the journal.
+ */
+ error = jbd2_journal_flush(journal);
+ if (error < 0) {
+ out:
+ jbd2_journal_unlock_updates(journal);
+ return error;
}
+
+ /* Journal blocked and flushed, clear needs_recovery flag. */
+ EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
+ error = ext4_commit_super(sb, 1);
+ if (error)
+ goto out;
return 0;
-out:
- jbd2_journal_unlock_updates(journal);
- return error;
}
/*
*/
static int ext4_unfreeze(struct super_block *sb)
{
- if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) {
- lock_super(sb);
- /* Reser the needs_recovery flag before the fs is unlocked. */
- EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
- ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
- unlock_super(sb);
- jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
- }
+ if (sb->s_flags & MS_RDONLY)
+ return 0;
+
+ lock_super(sb);
+ /* Reset the needs_recovery flag before the fs is unlocked. */
+ EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
+ ext4_commit_super(sb, 1);
+ unlock_super(sb);
+ jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
return 0;
}
}
}
if (sbi->s_journal == NULL)
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
#ifdef CONFIG_QUOTA
/* Release old quota file names */
if (test_opt(sb, MINIX_DF)) {
sbi->s_overhead_last = 0;
} else if (sbi->s_blocks_last != ext4_blocks_count(es)) {
- ext4_group_t ngroups = sbi->s_groups_count, i;
+ ext4_group_t i, ngroups = ext4_get_groups_count(sb);
ext4_fsblk_t overhead = 0;
- smp_rmb();
/*
* Compute the overhead (FS structures). This is constant
* is locked for write. Otherwise the are possible deadlocks:
* Process 1 Process 2
* ext4_create() quota_sync()
- * jbd2_journal_start() write_dquot()
- * DQUOT_INIT() down(dqio_mutex)
+ * jbd2_journal_start() write_dquot()
+ * vfs_dq_init() down(dqio_mutex)
* down(dqio_mutex) jbd2_journal_start()
*
*/
return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
}
-static int ext4_dquot_initialize(struct inode *inode, int type)
-{
- handle_t *handle;
- int ret, err;
-
- /* We may create quota structure so we need to reserve enough blocks */
- handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb));
- if (IS_ERR(handle))
- return PTR_ERR(handle);
- ret = dquot_initialize(inode, type);
- err = ext4_journal_stop(handle);
- if (!ret)
- ret = err;
- return ret;
-}
-
-static int ext4_dquot_drop(struct inode *inode)
-{
- handle_t *handle;
- int ret, err;
-
- /* We may delete quota structure so we need to reserve enough blocks */
- handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb));
- if (IS_ERR(handle)) {
- /*
- * We call dquot_drop() anyway to at least release references
- * to quota structures so that umount does not hang.
- */
- dquot_drop(inode);
- return PTR_ERR(handle);
- }
- ret = dquot_drop(inode);
- err = ext4_journal_stop(handle);
- if (!ret)
- ret = err;
- return ret;
-}
-
static int ext4_write_dquot(struct dquot *dquot)
{
int ret, err;
return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt);
}
-#ifdef CONFIG_PROC_FS
-static int ext4_ui_proc_show(struct seq_file *m, void *v)
-{
- unsigned int *p = m->private;
-
- seq_printf(m, "%u\n", *p);
- return 0;
-}
-
-static int ext4_ui_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ext4_ui_proc_show, PDE(inode)->data);
-}
-
-static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf,
- size_t cnt, loff_t *ppos)
-{
- unsigned long *p = PDE(file->f_path.dentry->d_inode)->data;
- char str[32];
-
- if (cnt >= sizeof(str))
- return -EINVAL;
- if (copy_from_user(str, buf, cnt))
- return -EFAULT;
-
- *p = simple_strtoul(str, NULL, 0);
- return cnt;
-}
-
-const struct file_operations ext4_ui_proc_fops = {
- .owner = THIS_MODULE,
- .open = ext4_ui_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = ext4_ui_proc_write,
-};
-#endif
-
static struct file_system_type ext4_fs_type = {
.owner = THIS_MODULE,
.name = "ext4",
{
int err;
+ ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj);
+ if (!ext4_kset)
+ return -ENOMEM;
ext4_proc_root = proc_mkdir("fs/ext4", NULL);
err = init_ext4_mballoc();
if (err)
exit_ext4_xattr();
exit_ext4_mballoc();
remove_proc_entry("fs/ext4", NULL);
+ kset_unregister(ext4_kset);
}
MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
projects / mirror_ubuntu-bionic-kernel.git / blobdiff