#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 <asm/uaccess.h>
#include "ext4_jbd2.h"
#include "xattr.h"
#include "acl.h"
+#include "mballoc.h"
-static int default_mb_history_length = 1000;
-
-module_param_named(default_mb_history_length, default_mb_history_length,
- int, 0644);
-MODULE_PARM_DESC(default_mb_history_length,
- "Default number of entries saved for mb_history");
+#define CREATE_TRACE_POINTS
+#include <trace/events/ext4.h>
struct proc_dir_entry *ext4_proc_root;
static struct kset *ext4_kset;
bg->bg_itable_unused_hi = cpu_to_le16(count >> 16);
}
+
+/* Just increment the non-pointer handle value */
+static handle_t *ext4_get_nojournal(void)
+{
+ handle_t *handle = current->journal_info;
+ unsigned long ref_cnt = (unsigned long)handle;
+
+ BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT);
+
+ ref_cnt++;
+ handle = (handle_t *)ref_cnt;
+
+ current->journal_info = handle;
+ return handle;
+}
+
+
+/* Decrement the non-pointer handle value */
+static void ext4_put_nojournal(handle_t *handle)
+{
+ unsigned long ref_cnt = (unsigned long)handle;
+
+ BUG_ON(ref_cnt == 0);
+
+ ref_cnt--;
+ handle = (handle_t *)ref_cnt;
+
+ current->journal_info = handle;
+}
+
/*
* Wrappers for jbd2_journal_start/end.
*
}
return jbd2_journal_start(journal, nblocks);
}
- /*
- * We're not journaling, return the appropriate indication.
- */
- current->journal_info = EXT4_NOJOURNAL_HANDLE;
- return current->journal_info;
+ return ext4_get_nojournal();
}
/*
int rc;
if (!ext4_handle_valid(handle)) {
- /*
- * Do this here since we don't call jbd2_journal_stop() in
- * no-journal mode.
- */
- current->journal_info = NULL;
+ ext4_put_nojournal(handle);
return 0;
}
sb = handle->h_transaction->t_journal->j_private;
if (!test_opt(sb, ERRORS_CONT)) {
journal_t *journal = EXT4_SB(sb)->s_journal;
- EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT;
+ EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED;
if (journal)
jbd2_journal_abort(journal, -EIO);
}
errstr = "Out of memory";
break;
case -EROFS:
- if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)
+ if (!sb || (EXT4_SB(sb)->s_journal &&
+ EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT))
errstr = "Journal has aborted";
else
errstr = "Readonly filesystem";
ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only");
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
sb->s_flags |= MS_RDONLY;
- EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT;
+ EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED;
if (EXT4_SB(sb)->s_journal)
jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO);
}
struct ext4_super_block *es = sbi->s_es;
int i, err;
+ flush_workqueue(sbi->dio_unwritten_wq);
+ destroy_workqueue(sbi->dio_unwritten_wq);
+
lock_super(sb);
lock_kernel();
if (sb->s_dirt)
if (!ei)
return NULL;
-#ifdef CONFIG_EXT4_FS_POSIX_ACL
- ei->i_acl = EXT4_ACL_NOT_CACHED;
- ei->i_default_acl = EXT4_ACL_NOT_CACHED;
-#endif
ei->vfs_inode.i_version = 1;
ei->vfs_inode.i_data.writeback_index = 0;
memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache));
ei->i_allocated_meta_blocks = 0;
ei->i_delalloc_reserved_flag = 0;
spin_lock_init(&(ei->i_block_reservation_lock));
+ INIT_LIST_HEAD(&ei->i_aio_dio_complete_list);
+ ei->cur_aio_dio = NULL;
return &ei->vfs_inode;
}
static void ext4_clear_inode(struct inode *inode)
{
-#ifdef CONFIG_EXT4_FS_POSIX_ACL
- if (EXT4_I(inode)->i_acl &&
- EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) {
- posix_acl_release(EXT4_I(inode)->i_acl);
- EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED;
- }
- if (EXT4_I(inode)->i_default_acl &&
- EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) {
- posix_acl_release(EXT4_I(inode)->i_default_acl);
- EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED;
- }
-#endif
ext4_discard_preallocations(inode);
if (EXT4_JOURNAL(inode))
jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal,
if (test_opt(sb, NO_AUTO_DA_ALLOC))
seq_puts(seq, ",noauto_da_alloc");
+ if (test_opt(sb, DISCARD))
+ seq_puts(seq, ",discard");
+
+ if (test_opt(sb, NOLOAD))
+ seq_puts(seq, ",norecovery");
+
ext4_show_quota_options(seq, sb);
return 0;
static ssize_t ext4_quota_write(struct super_block *sb, int type,
const char *data, size_t len, loff_t off);
-static struct dquot_operations ext4_quota_operations = {
+static const struct dquot_operations ext4_quota_operations = {
.initialize = dquot_initialize,
.drop = dquot_drop,
.alloc_space = dquot_alloc_space,
.destroy_dquot = dquot_destroy,
};
-static struct quotactl_ops ext4_qctl_operations = {
+static const struct quotactl_ops ext4_qctl_operations = {
.quota_on = ext4_quota_on,
.quota_off = vfs_quota_off,
.quota_sync = vfs_quota_sync,
Opt_journal_update, Opt_journal_dev,
Opt_journal_checksum, Opt_journal_async_commit,
Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
- Opt_data_err_abort, Opt_data_err_ignore, Opt_mb_history_length,
+ 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_nobarrier, Opt_err, Opt_resize,
Opt_usrquota, Opt_grpquota, Opt_i_version,
Opt_stripe, Opt_delalloc, Opt_nodelalloc,
Opt_block_validity, Opt_noblock_validity,
- Opt_inode_readahead_blks, Opt_journal_ioprio
+ Opt_inode_readahead_blks, Opt_journal_ioprio,
+ Opt_discard, Opt_nodiscard,
};
static const match_table_t tokens = {
{Opt_acl, "acl"},
{Opt_noacl, "noacl"},
{Opt_noload, "noload"},
+ {Opt_noload, "norecovery"},
{Opt_nobh, "nobh"},
{Opt_bh, "bh"},
{Opt_commit, "commit=%u"},
{Opt_data_writeback, "data=writeback"},
{Opt_data_err_abort, "data_err=abort"},
{Opt_data_err_ignore, "data_err=ignore"},
- {Opt_mb_history_length, "mb_history_length=%u"},
{Opt_offusrjquota, "usrjquota="},
{Opt_usrjquota, "usrjquota=%s"},
{Opt_offgrpjquota, "grpjquota="},
{Opt_auto_da_alloc, "auto_da_alloc=%u"},
{Opt_auto_da_alloc, "auto_da_alloc"},
{Opt_noauto_da_alloc, "noauto_da_alloc"},
+ {Opt_discard, "discard"},
+ {Opt_nodiscard, "nodiscard"},
{Opt_err, NULL},
};
case Opt_data_err_ignore:
clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
break;
- case Opt_mb_history_length:
- if (match_int(&args[0], &option))
- return 0;
- if (option < 0)
- return 0;
- sbi->s_mb_history_max = option;
- break;
#ifdef CONFIG_QUOTA
case Opt_usrjquota:
qtype = USRQUOTA;
break;
#endif
case Opt_abort:
- set_opt(sbi->s_mount_opt, ABORT);
+ sbi->s_mount_flags |= EXT4_MF_FS_ABORTED;
break;
case Opt_nobarrier:
clear_opt(sbi->s_mount_opt, BARRIER);
else
set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC);
break;
+ case Opt_discard:
+ set_opt(sbi->s_mount_opt, DISCARD);
+ break;
+ case Opt_nodiscard:
+ clear_opt(sbi->s_mount_opt, DISCARD);
+ break;
default:
ext4_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" "
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",
+ "bpg=%lu, ipg=%lu, mo=%04x]\n",
sb->s_blocksize,
sbi->s_groups_count,
EXT4_BLOCKS_PER_GROUP(sb),
EXT4_INODES_PER_GROUP(sb),
sbi->s_mount_opt);
- if (EXT4_SB(sb)->s_journal) {
- ext4_msg(sb, KERN_INFO, "%s journal on %s",
- EXT4_SB(sb)->s_journal->j_inode ? "internal" :
- "external", EXT4_SB(sb)->s_journal->j_devname);
- } else {
- ext4_msg(sb, KERN_INFO, "no journal");
- }
return res;
}
size_t size;
int i;
- if (!sbi->s_es->s_log_groups_per_flex) {
+ sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;
+ groups_per_flex = 1 << sbi->s_log_groups_per_flex;
+
+ if (groups_per_flex < 2) {
sbi->s_log_groups_per_flex = 0;
return 1;
}
- sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;
- groups_per_flex = 1 << sbi->s_log_groups_per_flex;
-
/* We allocate both existing and potentially added groups */
flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) +
((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) <<
gdp = ext4_get_group_desc(sb, i, NULL);
flex_group = ext4_flex_group(sbi, i);
- 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));
+ atomic_add(ext4_free_inodes_count(sb, gdp),
+ &sbi->s_flex_groups[flex_group].free_inodes);
+ atomic_add(ext4_free_blks_count(sb, gdp),
+ &sbi->s_flex_groups[flex_group].free_blocks);
+ atomic_add(ext4_used_dirs_count(sb, gdp),
+ &sbi->s_flex_groups[flex_group].used_dirs);
}
return 1;
/* small i_blocks in vfs inode? */
if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) {
/*
- * CONFIG_LBD is not enabled implies the inode
+ * CONFIG_LBDAF is not enabled implies the inode
* i_block represent total blocks in 512 bytes
* 32 == size of vfs inode i_blocks * 8
*/
if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) {
/*
- * !has_huge_files or CONFIG_LBD not enabled implies that
+ * !has_huge_files or CONFIG_LBDAF not enabled implies that
* the inode i_block field represents total file blocks in
* 2^32 512-byte sectors == size of vfs inode i_blocks * 8
*/
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(inode_goal, s_inode_goal);
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);
+EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump);
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(inode_goal),
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),
+ ATTR_LIST(max_writeback_mb_bump),
NULL,
};
.release = ext4_sb_release,
};
+/*
+ * Check whether this filesystem can be mounted based on
+ * the features present and the RDONLY/RDWR mount requested.
+ * Returns 1 if this filesystem can be mounted as requested,
+ * 0 if it cannot be.
+ */
+static int ext4_feature_set_ok(struct super_block *sb, int readonly)
+{
+ if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) {
+ ext4_msg(sb, KERN_ERR,
+ "Couldn't mount because of "
+ "unsupported optional features (%x)",
+ (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) &
+ ~EXT4_FEATURE_INCOMPAT_SUPP));
+ return 0;
+ }
+
+ if (readonly)
+ return 1;
+
+ /* Check that feature set is OK for a read-write mount */
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) {
+ ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of "
+ "unsupported optional features (%x)",
+ (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) &
+ ~EXT4_FEATURE_RO_COMPAT_SUPP));
+ return 0;
+ }
+ /*
+ * Large file size enabled file system can only be mounted
+ * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF
+ */
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
+ if (sizeof(blkcnt_t) < sizeof(u64)) {
+ ext4_msg(sb, KERN_ERR, "Filesystem with huge files "
+ "cannot be mounted RDWR without "
+ "CONFIG_LBDAF");
+ return 0;
+ }
+ }
+ return 1;
+}
+
static int ext4_fill_super(struct super_block *sb, void *data, int silent)
__releases(kernel_lock)
__acquires(kernel_lock)
unsigned int db_count;
unsigned int i;
int needs_recovery, has_huge_files;
- int features;
__u64 blocks_count;
int err;
unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ;
sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME;
sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME;
- sbi->s_mb_history_max = default_mb_history_length;
set_opt(sbi->s_mount_opt, BARRIER);
* previously didn't change the revision level when setting the flags,
* so there is a chance incompat flags are set on a rev 0 filesystem.
*/
- features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP);
- if (features) {
- ext4_msg(sb, KERN_ERR,
- "Couldn't mount because of "
- "unsupported optional features (%x)",
- (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) &
- ~EXT4_FEATURE_INCOMPAT_SUPP));
+ if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY)))
goto failed_mount;
- }
- features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP);
- if (!(sb->s_flags & MS_RDONLY) && features) {
- ext4_msg(sb, KERN_ERR,
- "Couldn't mount RDWR because of "
- "unsupported optional features (%x)",
- (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) &
- ~EXT4_FEATURE_RO_COMPAT_SUPP));
- goto failed_mount;
- }
- has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_HUGE_FILE);
- if (has_huge_files) {
- /*
- * Large file size enabled file system can only be
- * mount if kernel is build with CONFIG_LBD
- */
- if (sizeof(root->i_blocks) < sizeof(u64) &&
- !(sb->s_flags & MS_RDONLY)) {
- ext4_msg(sb, KERN_ERR, "Filesystem with huge "
- "files cannot be mounted read-write "
- "without CONFIG_LBD");
- goto failed_mount;
- }
- }
+
blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
if (blocksize < EXT4_MIN_BLOCK_SIZE ||
}
}
+ has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb,
+ EXT4_FEATURE_RO_COMPAT_HUGE_FILE);
sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits,
has_huge_files);
sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files);
goto failed_mount;
}
- if (ext4_blocks_count(es) >
- (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
+ /*
+ * Test whether we have more sectors than will fit in sector_t,
+ * and whether the max offset is addressable by the page cache.
+ */
+ if ((ext4_blocks_count(es) >
+ (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) ||
+ (ext4_blocks_count(es) >
+ (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) {
ext4_msg(sb, KERN_ERR, "filesystem"
- " too large to mount safely");
+ " too large to mount safely on this system");
if (sizeof(sector_t) < 8)
- ext4_msg(sb, KERN_WARNING, "CONFIG_LBD not enabled");
+ ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled");
+ ret = -EFBIG;
goto failed_mount;
}
goto failed_mount;
}
sbi->s_groups_count = blocks_count;
+ sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count,
+ (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb)));
db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /
EXT4_DESC_PER_BLOCK(sb);
sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *),
}
sbi->s_stripe = ext4_get_stripe_size(sbi);
+ sbi->s_max_writeback_mb_bump = 128;
/*
* set up enough so that it can read an inode
EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) {
if (ext4_load_journal(sb, es, journal_devnum))
goto failed_mount3;
- if (!(sb->s_flags & MS_RDONLY) &&
- EXT4_SB(sb)->s_journal->j_failed_commit) {
- ext4_msg(sb, KERN_CRIT, "error: "
- "ext4_fill_super: Journal transaction "
- "%u is corrupt",
- EXT4_SB(sb)->s_journal->j_failed_commit);
- if (test_opt(sb, ERRORS_RO)) {
- ext4_msg(sb, KERN_CRIT,
- "Mounting filesystem read-only");
- sb->s_flags |= MS_RDONLY;
- EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
- es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
- }
- 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, 1);
- goto failed_mount4;
- }
- }
} else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) &&
EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) {
ext4_msg(sb, KERN_ERR, "required journal recovery "
clear_opt(sbi->s_mount_opt, NOBH);
}
}
+ EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten");
+ if (!EXT4_SB(sb)->dio_unwritten_wq) {
+ printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n");
+ goto failed_mount_wq;
+ }
+
/*
* The jbd2_journal_load will have done any necessary log recovery,
* so we can safely mount the rest of the filesystem now.
"available");
}
- if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) {
+ if (test_opt(sb, DELALLOC) &&
+ (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) {
ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - "
"requested data journaling mode");
clear_opt(sbi->s_mount_opt, DELALLOC);
- } else if (test_opt(sb, DELALLOC))
- ext4_msg(sb, KERN_INFO, "delayed allocation enabled");
+ }
err = ext4_setup_system_zone(sb);
if (err) {
failed_mount4:
ext4_msg(sb, KERN_ERR, "mount failed");
+ destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq);
+failed_mount_wq:
ext4_release_system_zone(sb);
if (sbi->s_journal) {
jbd2_journal_destroy(sbi->s_journal);
return -EINVAL;
}
- if (journal->j_flags & JBD2_BARRIER)
- ext4_msg(sb, KERN_INFO, "barriers enabled");
- else
+ if (!(journal->j_flags & JBD2_BARRIER))
ext4_msg(sb, KERN_INFO, "barriers disabled");
if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
clear_buffer_write_io_error(sbh);
set_buffer_uptodate(sbh);
}
- es->s_wtime = cpu_to_le32(get_seconds());
+ /*
+ * If the file system is mounted read-only, don't update the
+ * superblock write time. This avoids updating the superblock
+ * write time when we are mounting the root file system
+ * read/only but we need to replay the journal; at that point,
+ * for people who are east of GMT and who make their clock
+ * tick in localtime for Windows bug-for-bug compatibility,
+ * the clock is set in the future, and this will cause e2fsck
+ * to complain and force a full file system check.
+ */
+ if (!(sb->s_flags & MS_RDONLY))
+ 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]) -
{
int ret = 0;
tid_t target;
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
- trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait);
- if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) {
+ trace_ext4_sync_fs(sb, wait);
+ flush_workqueue(sbi->dio_unwritten_wq);
+ if (jbd2_journal_start_commit(sbi->s_journal, &target)) {
if (wait)
- jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target);
+ jbd2_log_wait_commit(sbi->s_journal, target);
}
return ret;
}
int i;
#endif
+ lock_kernel();
+
/* Store the original options */
lock_super(sb);
old_sb_flags = sb->s_flags;
goto restore_opts;
}
- if (sbi->s_mount_opt & EXT4_MOUNT_ABORT)
+ if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED)
ext4_abort(sb, __func__, "Abort forced by user");
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
n_blocks_count > ext4_blocks_count(es)) {
- if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) {
+ if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) {
err = -EROFS;
goto restore_opts;
}
if (sbi->s_journal)
ext4_mark_recovery_complete(sb, es);
} else {
- int ret;
- if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb,
- ~EXT4_FEATURE_RO_COMPAT_SUPP))) {
- ext4_msg(sb, KERN_WARNING, "couldn't "
- "remount RDWR because of unsupported "
- "optional features (%x)",
- (le32_to_cpu(sbi->s_es->s_feature_ro_compat) &
- ~EXT4_FEATURE_RO_COMPAT_SUPP));
+ /* Make sure we can mount this feature set readwrite */
+ if (!ext4_feature_set_ok(sb, 0)) {
err = -EROFS;
goto restore_opts;
}
-
/*
* Make sure the group descriptor checksums
* are sane. If they aren't, refuse to remount r/w.
kfree(old_opts.s_qf_names[i]);
#endif
unlock_super(sb);
+ unlock_kernel();
return 0;
restore_opts:
}
#endif
unlock_super(sb);
+ unlock_kernel();
return err;
}
buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last;
buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) -
percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter);
- ext4_free_blocks_count_set(es, buf->f_bfree);
buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es);
if (buf->f_bfree < ext4_r_blocks_count(es))
buf->f_bavail = 0;
buf->f_files = le32_to_cpu(es->s_inodes_count);
buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);
- es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
buf->f_namelen = EXT4_NAME_LEN;
fsid = le64_to_cpup((void *)es->s_uuid) ^
le64_to_cpup((void *)es->s_uuid + sizeof(u64));
.fs_flags = FS_REQUIRES_DEV,
};
-#ifdef CONFIG_EXT4DEV_COMPAT
-static int ext4dev_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data,struct vfsmount *mnt)
-{
- printk(KERN_WARNING "EXT4-fs (%s): Update your userspace programs "
- "to mount using ext4\n", dev_name);
- printk(KERN_WARNING "EXT4-fs (%s): ext4dev backwards compatibility "
- "will go away by 2.6.31\n", dev_name);
- return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt);
-}
-
-static struct file_system_type ext4dev_fs_type = {
- .owner = THIS_MODULE,
- .name = "ext4dev",
- .get_sb = ext4dev_get_sb,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV,
-};
-MODULE_ALIAS("ext4dev");
-#endif
-
static int __init init_ext4_fs(void)
{
int err;
err = register_filesystem(&ext4_fs_type);
if (err)
goto out;
-#ifdef CONFIG_EXT4DEV_COMPAT
- err = register_filesystem(&ext4dev_fs_type);
- if (err) {
- unregister_filesystem(&ext4_fs_type);
- goto out;
- }
-#endif
return 0;
out:
destroy_inodecache();
static void __exit exit_ext4_fs(void)
{
unregister_filesystem(&ext4_fs_type);
-#ifdef CONFIG_EXT4DEV_COMPAT
- unregister_filesystem(&ext4dev_fs_type);
-#endif
destroy_inodecache();
exit_ext4_xattr();
exit_ext4_mballoc();
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff