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authorLinus Torvalds <torvalds@linux-foundation.org>2014-10-20 18:50:11 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-20 18:50:11 +0200
commitc2661b806092d8ea2dccb7b02b65776555e0ee47 (patch)
treeebc73fa58706e5a0a79235953c532ac6c6e2b539 /fs/ext4/super.c
parentLinux 3.18-rc1 (diff)
parentext4: check s_chksum_driver when looking for bg csum presence (diff)
downloadlinux-c2661b806092d8ea2dccb7b02b65776555e0ee47.tar.xz
linux-c2661b806092d8ea2dccb7b02b65776555e0ee47.zip
Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 updates from Ted Ts'o: "A large number of cleanups and bug fixes, with some (minor) journal optimizations" [ This got sent to me before -rc1, but was stuck in my spam folder. - Linus ] * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (67 commits) ext4: check s_chksum_driver when looking for bg csum presence ext4: move error report out of atomic context in ext4_init_block_bitmap() ext4: Replace open coded mdata csum feature to helper function ext4: delete useless comments about ext4_move_extents ext4: fix reservation overflow in ext4_da_write_begin ext4: add ext4_iget_normal() which is to be used for dir tree lookups ext4: don't orphan or truncate the boot loader inode ext4: grab missed write_count for EXT4_IOC_SWAP_BOOT ext4: optimize block allocation on grow indepth ext4: get rid of code duplication ext4: fix over-defensive complaint after journal abort ext4: fix return value of ext4_do_update_inode ext4: fix mmap data corruption when blocksize < pagesize vfs: fix data corruption when blocksize < pagesize for mmaped data ext4: fold ext4_nojournal_sops into ext4_sops ext4: support freezing ext2 (nojournal) file systems ext4: fold ext4_sync_fs_nojournal() into ext4_sync_fs() ext4: don't check quota format when there are no quota files jbd2: simplify calling convention around __jbd2_journal_clean_checkpoint_list jbd2: avoid pointless scanning of checkpoint lists ...
Diffstat (limited to 'fs/ext4/super.c')
-rw-r--r--fs/ext4/super.c245
1 files changed, 128 insertions, 117 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 05c159218bc2..1eda6ab0ef9d 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -70,7 +70,6 @@ static void ext4_mark_recovery_complete(struct super_block *sb,
static void ext4_clear_journal_err(struct super_block *sb,
struct ext4_super_block *es);
static int ext4_sync_fs(struct super_block *sb, int wait);
-static int ext4_sync_fs_nojournal(struct super_block *sb, int wait);
static int ext4_remount(struct super_block *sb, int *flags, char *data);
static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf);
static int ext4_unfreeze(struct super_block *sb);
@@ -141,8 +140,7 @@ static __le32 ext4_superblock_csum(struct super_block *sb,
static int ext4_superblock_csum_verify(struct super_block *sb,
struct ext4_super_block *es)
{
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return 1;
return es->s_checksum == ext4_superblock_csum(sb, es);
@@ -152,8 +150,7 @@ void ext4_superblock_csum_set(struct super_block *sb)
{
struct ext4_super_block *es = EXT4_SB(sb)->s_es;
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return;
es->s_checksum = ext4_superblock_csum(sb, es);
@@ -820,10 +817,9 @@ static void ext4_put_super(struct super_block *sb)
percpu_counter_destroy(&sbi->s_freeinodes_counter);
percpu_counter_destroy(&sbi->s_dirs_counter);
percpu_counter_destroy(&sbi->s_dirtyclusters_counter);
- percpu_counter_destroy(&sbi->s_extent_cache_cnt);
brelse(sbi->s_sbh);
#ifdef CONFIG_QUOTA
- for (i = 0; i < MAXQUOTAS; i++)
+ for (i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(sbi->s_qf_names[i]);
#endif
@@ -885,6 +881,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
ext4_es_init_tree(&ei->i_es_tree);
rwlock_init(&ei->i_es_lock);
INIT_LIST_HEAD(&ei->i_es_lru);
+ ei->i_es_all_nr = 0;
ei->i_es_lru_nr = 0;
ei->i_touch_when = 0;
ei->i_reserved_data_blocks = 0;
@@ -1002,7 +999,7 @@ static struct inode *ext4_nfs_get_inode(struct super_block *sb,
* Currently we don't know the generation for parent directory, so
* a generation of 0 means "accept any"
*/
- inode = ext4_iget(sb, ino);
+ inode = ext4_iget_normal(sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
if (generation && inode->i_generation != generation) {
@@ -1124,25 +1121,6 @@ static const struct super_operations ext4_sops = {
.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,
- .drop_inode = ext4_drop_inode,
- .evict_inode = ext4_evict_inode,
- .sync_fs = ext4_sync_fs_nojournal,
- .put_super = ext4_put_super,
- .statfs = ext4_statfs,
- .remount_fs = ext4_remount,
- .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,
@@ -1712,13 +1690,6 @@ static int parse_options(char *options, struct super_block *sb,
"not specified");
return 0;
}
- } else {
- if (sbi->s_jquota_fmt) {
- ext4_msg(sb, KERN_ERR, "journaled quota format "
- "specified with no journaling "
- "enabled");
- return 0;
- }
}
#endif
if (test_opt(sb, DIOREAD_NOLOCK)) {
@@ -2016,8 +1987,7 @@ static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group,
__u16 crc = 0;
__le32 le_group = cpu_to_le32(block_group);
- if ((sbi->s_es->s_feature_ro_compat &
- cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) {
+ if (ext4_has_metadata_csum(sbi->s_sb)) {
/* Use new metadata_csum algorithm */
__le16 save_csum;
__u32 csum32;
@@ -2035,6 +2005,10 @@ static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group,
}
/* old crc16 code */
+ if (!(sbi->s_es->s_feature_ro_compat &
+ cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)))
+ return 0;
+
offset = offsetof(struct ext4_group_desc, bg_checksum);
crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid));
@@ -2191,7 +2165,7 @@ static void ext4_orphan_cleanup(struct super_block *sb,
if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
/* don't clear list on RO mount w/ errors */
if (es->s_last_orphan && !(s_flags & MS_RDONLY)) {
- jbd_debug(1, "Errors on filesystem, "
+ ext4_msg(sb, KERN_INFO, "Errors on filesystem, "
"clearing orphan list.\n");
es->s_last_orphan = 0;
}
@@ -2207,7 +2181,7 @@ static void ext4_orphan_cleanup(struct super_block *sb,
/* Needed for iput() to work correctly and not trash data */
sb->s_flags |= MS_ACTIVE;
/* Turn on quotas so that they are updated correctly */
- for (i = 0; i < MAXQUOTAS; i++) {
+ for (i = 0; i < EXT4_MAXQUOTAS; i++) {
if (EXT4_SB(sb)->s_qf_names[i]) {
int ret = ext4_quota_on_mount(sb, i);
if (ret < 0)
@@ -2263,7 +2237,7 @@ static void ext4_orphan_cleanup(struct super_block *sb,
PLURAL(nr_truncates));
#ifdef CONFIG_QUOTA
/* Turn quotas off */
- for (i = 0; i < MAXQUOTAS; i++) {
+ for (i = 0; i < EXT4_MAXQUOTAS; i++) {
if (sb_dqopt(sb)->files[i])
dquot_quota_off(sb, i);
}
@@ -2548,6 +2522,16 @@ static ssize_t sbi_ui_store(struct ext4_attr *a,
return count;
}
+static ssize_t es_ui_show(struct ext4_attr *a,
+ struct ext4_sb_info *sbi, char *buf)
+{
+
+ unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) +
+ a->u.offset);
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
+}
+
static ssize_t reserved_clusters_show(struct ext4_attr *a,
struct ext4_sb_info *sbi, char *buf)
{
@@ -2601,14 +2585,29 @@ static struct ext4_attr ext4_attr_##_name = { \
.offset = offsetof(struct ext4_sb_info, _elname),\
}, \
}
+
+#define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \
+static struct ext4_attr ext4_attr_##_name = { \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
+ .show = _show, \
+ .store = _store, \
+ .u = { \
+ .offset = offsetof(struct ext4_super_block, _elname), \
+ }, \
+}
+
#define EXT4_ATTR(name, mode, show, store) \
static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store)
#define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL)
#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_RO_ATTR_ES_UI(name, elname) \
+ EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname)
#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
#define EXT4_DEPRECATED_ATTR(_name, _val) \
static struct ext4_attr ext4_attr_##_name = { \
@@ -2641,6 +2640,9 @@ EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.int
EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst);
EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval);
EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst);
+EXT4_RO_ATTR_ES_UI(errors_count, s_error_count);
+EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time);
+EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time);
static struct attribute *ext4_attrs[] = {
ATTR_LIST(delayed_allocation_blocks),
@@ -2664,6 +2666,9 @@ static struct attribute *ext4_attrs[] = {
ATTR_LIST(warning_ratelimit_burst),
ATTR_LIST(msg_ratelimit_interval_ms),
ATTR_LIST(msg_ratelimit_burst),
+ ATTR_LIST(errors_count),
+ ATTR_LIST(first_error_time),
+ ATTR_LIST(last_error_time),
NULL,
};
@@ -2723,9 +2728,25 @@ static void ext4_feat_release(struct kobject *kobj)
complete(&ext4_feat->f_kobj_unregister);
}
+static ssize_t ext4_feat_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "supported\n");
+}
+
+/*
+ * We can not use ext4_attr_show/store because it relies on the kobject
+ * being embedded in the ext4_sb_info structure which is definitely not
+ * true in this case.
+ */
+static const struct sysfs_ops ext4_feat_ops = {
+ .show = ext4_feat_show,
+ .store = NULL,
+};
+
static struct kobj_type ext4_feat_ktype = {
.default_attrs = ext4_feat_attrs,
- .sysfs_ops = &ext4_attr_ops,
+ .sysfs_ops = &ext4_feat_ops,
.release = ext4_feat_release,
};
@@ -3179,8 +3200,7 @@ static int set_journal_csum_feature_set(struct super_block *sb)
int compat, incompat;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
+ if (ext4_has_metadata_csum(sb)) {
/* journal checksum v3 */
compat = 0;
incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3;
@@ -3190,6 +3210,10 @@ static int set_journal_csum_feature_set(struct super_block *sb)
incompat = 0;
}
+ jbd2_journal_clear_features(sbi->s_journal,
+ JBD2_FEATURE_COMPAT_CHECKSUM, 0,
+ JBD2_FEATURE_INCOMPAT_CSUM_V3 |
+ JBD2_FEATURE_INCOMPAT_CSUM_V2);
if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
ret = jbd2_journal_set_features(sbi->s_journal,
compat, 0,
@@ -3202,11 +3226,8 @@ static int set_journal_csum_feature_set(struct super_block *sb)
jbd2_journal_clear_features(sbi->s_journal, 0, 0,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
} else {
- jbd2_journal_clear_features(sbi->s_journal,
- JBD2_FEATURE_COMPAT_CHECKSUM, 0,
- JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT |
- JBD2_FEATURE_INCOMPAT_CSUM_V3 |
- JBD2_FEATURE_INCOMPAT_CSUM_V2);
+ jbd2_journal_clear_features(sbi->s_journal, 0, 0,
+ JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
}
return ret;
@@ -3436,7 +3457,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
logical_sb_block = sb_block;
}
- if (!(bh = sb_bread(sb, logical_sb_block))) {
+ if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) {
ext4_msg(sb, KERN_ERR, "unable to read superblock");
goto out_fail;
}
@@ -3487,8 +3508,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
}
/* Precompute checksum seed for all metadata */
- if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(sb))
sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid,
sizeof(es->s_uuid));
@@ -3519,8 +3539,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
set_opt(sb, ERRORS_CONT);
else
set_opt(sb, ERRORS_RO);
- if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)
- set_opt(sb, BLOCK_VALIDITY);
+ /* block_validity enabled by default; disable with noblock_validity */
+ set_opt(sb, BLOCK_VALIDITY);
if (def_mount_opts & EXT4_DEFM_DISCARD)
set_opt(sb, DISCARD);
@@ -3646,7 +3666,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
brelse(bh);
logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
offset = do_div(logical_sb_block, blocksize);
- bh = sb_bread(sb, logical_sb_block);
+ bh = sb_bread_unmovable(sb, logical_sb_block);
if (!bh) {
ext4_msg(sb, KERN_ERR,
"Can't read superblock on 2nd try");
@@ -3868,7 +3888,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
for (i = 0; i < db_count; i++) {
block = descriptor_loc(sb, logical_sb_block, i);
- sbi->s_group_desc[i] = sb_bread(sb, block);
+ sbi->s_group_desc[i] = sb_bread_unmovable(sb, block);
if (!sbi->s_group_desc[i]) {
ext4_msg(sb, KERN_ERR,
"can't read group descriptor %d", i);
@@ -3890,13 +3910,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_err_report.data = (unsigned long) sb;
/* Register extent status tree shrinker */
- ext4_es_register_shrinker(sbi);
-
- err = percpu_counter_init(&sbi->s_extent_cache_cnt, 0, GFP_KERNEL);
- if (err) {
- ext4_msg(sb, KERN_ERR, "insufficient memory");
+ if (ext4_es_register_shrinker(sbi))
goto failed_mount3;
- }
sbi->s_stripe = ext4_get_stripe_size(sbi);
sbi->s_extent_max_zeroout_kb = 32;
@@ -3904,11 +3919,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
/*
* set up enough so that it can read an inode
*/
- 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_op = &ext4_sops;
sb->s_export_op = &ext4_export_ops;
sb->s_xattr = ext4_xattr_handlers;
#ifdef CONFIG_QUOTA
@@ -4229,10 +4240,9 @@ failed_mount_wq:
jbd2_journal_destroy(sbi->s_journal);
sbi->s_journal = NULL;
}
-failed_mount3:
ext4_es_unregister_shrinker(sbi);
+failed_mount3:
del_timer_sync(&sbi->s_err_report);
- percpu_counter_destroy(&sbi->s_extent_cache_cnt);
if (sbi->s_mmp_tsk)
kthread_stop(sbi->s_mmp_tsk);
failed_mount2:
@@ -4247,7 +4257,7 @@ failed_mount:
remove_proc_entry(sb->s_id, ext4_proc_root);
}
#ifdef CONFIG_QUOTA
- for (i = 0; i < MAXQUOTAS; i++)
+ for (i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(sbi->s_qf_names[i]);
#endif
ext4_blkdev_remove(sbi);
@@ -4375,6 +4385,15 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb,
goto out_bdev;
}
+ if ((le32_to_cpu(es->s_feature_ro_compat) &
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
+ es->s_checksum != ext4_superblock_csum(sb, es)) {
+ ext4_msg(sb, KERN_ERR, "external journal has "
+ "corrupt superblock");
+ brelse(bh);
+ goto out_bdev;
+ }
+
if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
ext4_msg(sb, KERN_ERR, "journal UUID does not match");
brelse(bh);
@@ -4677,15 +4696,19 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
* being sent at the end of the function. But we can skip it if
* transaction_commit will do it for us.
*/
- target = jbd2_get_latest_transaction(sbi->s_journal);
- if (wait && sbi->s_journal->j_flags & JBD2_BARRIER &&
- !jbd2_trans_will_send_data_barrier(sbi->s_journal, target))
+ if (sbi->s_journal) {
+ target = jbd2_get_latest_transaction(sbi->s_journal);
+ if (wait && sbi->s_journal->j_flags & JBD2_BARRIER &&
+ !jbd2_trans_will_send_data_barrier(sbi->s_journal, target))
+ needs_barrier = true;
+
+ if (jbd2_journal_start_commit(sbi->s_journal, &target)) {
+ if (wait)
+ ret = jbd2_log_wait_commit(sbi->s_journal,
+ target);
+ }
+ } else if (wait && test_opt(sb, BARRIER))
needs_barrier = true;
-
- if (jbd2_journal_start_commit(sbi->s_journal, &target)) {
- if (wait)
- ret = jbd2_log_wait_commit(sbi->s_journal, target);
- }
if (needs_barrier) {
int err;
err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
@@ -4696,19 +4719,6 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
return ret;
}
-static int ext4_sync_fs_nojournal(struct super_block *sb, int wait)
-{
- int ret = 0;
-
- trace_ext4_sync_fs(sb, wait);
- flush_workqueue(EXT4_SB(sb)->rsv_conversion_wq);
- dquot_writeback_dquots(sb, -1);
- if (wait && test_opt(sb, BARRIER))
- ret = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
-
- return ret;
-}
-
/*
* LVM calls this function before a (read-only) snapshot is created. This
* gives us a chance to flush the journal completely and mark the fs clean.
@@ -4727,23 +4737,26 @@ static int ext4_freeze(struct super_block *sb)
journal = EXT4_SB(sb)->s_journal;
- /* Now we set up the journal barrier. */
- jbd2_journal_lock_updates(journal);
+ if (journal) {
+ /* Now we set up the journal barrier. */
+ jbd2_journal_lock_updates(journal);
- /*
- * Don't clear the needs_recovery flag if we failed to flush
- * the journal.
- */
- error = jbd2_journal_flush(journal);
- if (error < 0)
- goto out;
+ /*
+ * Don't clear the needs_recovery flag if we failed to
+ * flush the journal.
+ */
+ error = jbd2_journal_flush(journal);
+ if (error < 0)
+ goto out;
+ }
/* Journal blocked and flushed, clear needs_recovery flag. */
EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
error = ext4_commit_super(sb, 1);
out:
- /* we rely on upper layer to stop further updates */
- jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
+ if (journal)
+ /* we rely on upper layer to stop further updates */
+ jbd2_journal_unlock_updates(journal);
return error;
}
@@ -4774,7 +4787,7 @@ struct ext4_mount_options {
u32 s_min_batch_time, s_max_batch_time;
#ifdef CONFIG_QUOTA
int s_jquota_fmt;
- char *s_qf_names[MAXQUOTAS];
+ char *s_qf_names[EXT4_MAXQUOTAS];
#endif
};
@@ -4804,7 +4817,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
old_opts.s_max_batch_time = sbi->s_max_batch_time;
#ifdef CONFIG_QUOTA
old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
- for (i = 0; i < MAXQUOTAS; i++)
+ for (i = 0; i < EXT4_MAXQUOTAS; i++)
if (sbi->s_qf_names[i]) {
old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i],
GFP_KERNEL);
@@ -4965,7 +4978,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
#ifdef CONFIG_QUOTA
/* Release old quota file names */
- for (i = 0; i < MAXQUOTAS; i++)
+ for (i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(old_opts.s_qf_names[i]);
if (enable_quota) {
if (sb_any_quota_suspended(sb))
@@ -4994,7 +5007,7 @@ restore_opts:
sbi->s_max_batch_time = old_opts.s_max_batch_time;
#ifdef CONFIG_QUOTA
sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
- for (i = 0; i < MAXQUOTAS; i++) {
+ for (i = 0; i < EXT4_MAXQUOTAS; i++) {
kfree(sbi->s_qf_names[i]);
sbi->s_qf_names[i] = old_opts.s_qf_names[i];
}
@@ -5197,7 +5210,7 @@ static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
{
int err;
struct inode *qf_inode;
- unsigned long qf_inums[MAXQUOTAS] = {
+ unsigned long qf_inums[EXT4_MAXQUOTAS] = {
le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),
le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum)
};
@@ -5225,13 +5238,13 @@ static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
static int ext4_enable_quotas(struct super_block *sb)
{
int type, err = 0;
- unsigned long qf_inums[MAXQUOTAS] = {
+ unsigned long qf_inums[EXT4_MAXQUOTAS] = {
le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),
le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum)
};
sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
- for (type = 0; type < MAXQUOTAS; type++) {
+ for (type = 0; type < EXT4_MAXQUOTAS; type++) {
if (qf_inums[type]) {
err = ext4_quota_enable(sb, type, QFMT_VFS_V1,
DQUOT_USAGE_ENABLED);
@@ -5309,7 +5322,6 @@ static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
{
struct inode *inode = sb_dqopt(sb)->files[type];
ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
- int err = 0;
int offset = off & (sb->s_blocksize - 1);
int tocopy;
size_t toread;
@@ -5324,9 +5336,9 @@ static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
while (toread > 0) {
tocopy = sb->s_blocksize - offset < toread ?
sb->s_blocksize - offset : toread;
- bh = ext4_bread(NULL, inode, blk, 0, &err);
- if (err)
- return err;
+ bh = ext4_bread(NULL, inode, blk, 0);
+ if (IS_ERR(bh))
+ return PTR_ERR(bh);
if (!bh) /* A hole? */
memset(data, 0, tocopy);
else
@@ -5347,8 +5359,7 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
{
struct inode *inode = sb_dqopt(sb)->files[type];
ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
- int err = 0;
- int offset = off & (sb->s_blocksize - 1);
+ int err, offset = off & (sb->s_blocksize - 1);
struct buffer_head *bh;
handle_t *handle = journal_current_handle();
@@ -5369,14 +5380,16 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
return -EIO;
}
- bh = ext4_bread(handle, inode, blk, 1, &err);
+ bh = ext4_bread(handle, inode, blk, 1);
+ if (IS_ERR(bh))
+ return PTR_ERR(bh);
if (!bh)
goto out;
BUFFER_TRACE(bh, "get write access");
err = ext4_journal_get_write_access(handle, bh);
if (err) {
brelse(bh);
- goto out;
+ return err;
}
lock_buffer(bh);
memcpy(bh->b_data+offset, data, len);
@@ -5385,8 +5398,6 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
err = ext4_handle_dirty_metadata(handle, NULL, bh);
brelse(bh);
out:
- if (err)
- return err;
if (inode->i_size < off + len) {
i_size_write(inode, off + len);
EXT4_I(inode)->i_disksize = inode->i_size;