#include <linux/slab.h>
#include "ext4_jbd2.h"
-#include "group.h"
#define outside(b, first, last) ((b) < (first) || (b) >= (last))
#define inside(b, first, last) ((b) >= (first) && (b) < (last))
ext4_get_group_no_and_offset(sb, start, NULL, &offset);
if (group != sbi->s_groups_count)
- ext4_warning(sb, __func__,
- "Cannot add at group %u (only %u groups)",
+ ext4_warning(sb, "Cannot add at group %u (only %u groups)",
input->group, sbi->s_groups_count);
else if (offset != 0)
- ext4_warning(sb, __func__, "Last group not full");
+ ext4_warning(sb, "Last group not full");
else if (input->reserved_blocks > input->blocks_count / 5)
- ext4_warning(sb, __func__, "Reserved blocks too high (%u)",
+ ext4_warning(sb, "Reserved blocks too high (%u)",
input->reserved_blocks);
else if (free_blocks_count < 0)
- ext4_warning(sb, __func__, "Bad blocks count %u",
+ ext4_warning(sb, "Bad blocks count %u",
input->blocks_count);
else if (!(bh = sb_bread(sb, end - 1)))
- ext4_warning(sb, __func__,
- "Cannot read last block (%llu)",
+ ext4_warning(sb, "Cannot read last block (%llu)",
end - 1);
else if (outside(input->block_bitmap, start, end))
- ext4_warning(sb, __func__,
- "Block bitmap not in group (block %llu)",
+ ext4_warning(sb, "Block bitmap not in group (block %llu)",
(unsigned long long)input->block_bitmap);
else if (outside(input->inode_bitmap, start, end))
- ext4_warning(sb, __func__,
- "Inode bitmap not in group (block %llu)",
+ ext4_warning(sb, "Inode bitmap not in group (block %llu)",
(unsigned long long)input->inode_bitmap);
else if (outside(input->inode_table, start, end) ||
outside(itend - 1, start, end))
- ext4_warning(sb, __func__,
- "Inode table not in group (blocks %llu-%llu)",
+ ext4_warning(sb, "Inode table not in group (blocks %llu-%llu)",
(unsigned long long)input->inode_table, itend - 1);
else if (input->inode_bitmap == input->block_bitmap)
- ext4_warning(sb, __func__,
- "Block bitmap same as inode bitmap (%llu)",
+ ext4_warning(sb, "Block bitmap same as inode bitmap (%llu)",
(unsigned long long)input->block_bitmap);
else if (inside(input->block_bitmap, input->inode_table, itend))
- ext4_warning(sb, __func__,
- "Block bitmap (%llu) in inode table (%llu-%llu)",
+ ext4_warning(sb, "Block bitmap (%llu) in inode table "
+ "(%llu-%llu)",
(unsigned long long)input->block_bitmap,
(unsigned long long)input->inode_table, itend - 1);
else if (inside(input->inode_bitmap, input->inode_table, itend))
- ext4_warning(sb, __func__,
- "Inode bitmap (%llu) in inode table (%llu-%llu)",
+ ext4_warning(sb, "Inode bitmap (%llu) in inode table "
+ "(%llu-%llu)",
(unsigned long long)input->inode_bitmap,
(unsigned long long)input->inode_table, itend - 1);
else if (inside(input->block_bitmap, start, metaend))
- ext4_warning(sb, __func__,
- "Block bitmap (%llu) in GDT table"
- " (%llu-%llu)",
+ ext4_warning(sb, "Block bitmap (%llu) in GDT table (%llu-%llu)",
(unsigned long long)input->block_bitmap,
start, metaend - 1);
else if (inside(input->inode_bitmap, start, metaend))
- ext4_warning(sb, __func__,
- "Inode bitmap (%llu) in GDT table"
- " (%llu-%llu)",
+ ext4_warning(sb, "Inode bitmap (%llu) in GDT table (%llu-%llu)",
(unsigned long long)input->inode_bitmap,
start, metaend - 1);
else if (inside(input->inode_table, start, metaend) ||
inside(itend - 1, start, metaend))
- ext4_warning(sb, __func__,
- "Inode table (%llu-%llu) overlaps"
- "GDT table (%llu-%llu)",
+ ext4_warning(sb, "Inode table (%llu-%llu) overlaps GDT table "
+ "(%llu-%llu)",
(unsigned long long)input->inode_table,
itend - 1, start, metaend - 1);
else
if (IS_ERR(handle))
return PTR_ERR(handle);
- lock_super(sb);
+ mutex_lock(&sbi->s_resize_lock);
if (input->group != sbi->s_groups_count) {
err = -EBUSY;
goto exit_journal;
goto exit_bh;
if (IS_ERR(gdb = bclean(handle, sb, block))) {
- err = PTR_ERR(bh);
+ err = PTR_ERR(gdb);
goto exit_bh;
}
ext4_handle_dirty_metadata(handle, NULL, gdb);
brelse(bh);
exit_journal:
- unlock_super(sb);
+ mutex_unlock(&sbi->s_resize_lock);
if ((err2 = ext4_journal_stop(handle)) && !err)
err = err2;
while ((grp = ext4_list_backups(sb, &three, &five, &seven)) < end) {
if (le32_to_cpu(*p++) !=
grp * EXT4_BLOCKS_PER_GROUP(sb) + blk){
- ext4_warning(sb, __func__,
- "reserved GDT %llu"
+ ext4_warning(sb, "reserved GDT %llu"
" missing grp %d (%llu)",
blk, grp,
grp *
*/
if (EXT4_SB(sb)->s_sbh->b_blocknr !=
le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) {
- ext4_warning(sb, __func__,
- "won't resize using backup superblock at %llu",
+ ext4_warning(sb, "won't resize using backup superblock at %llu",
(unsigned long long)EXT4_SB(sb)->s_sbh->b_blocknr);
return -EPERM;
}
data = (__le32 *)dind->b_data;
if (le32_to_cpu(data[gdb_num % EXT4_ADDR_PER_BLOCK(sb)]) != gdblock) {
- ext4_warning(sb, __func__,
- "new group %u GDT block %llu not reserved",
+ ext4_warning(sb, "new group %u GDT block %llu not reserved",
input->group, gdblock);
err = -EINVAL;
goto exit_dind;
GFP_NOFS);
if (!n_group_desc) {
err = -ENOMEM;
- ext4_warning(sb, __func__,
+ ext4_warning(sb,
"not enough memory for %lu groups", gdb_num + 1);
goto exit_inode;
}
/* Get each reserved primary GDT block and verify it holds backups */
for (res = 0; res < reserved_gdb; res++, blk++) {
if (le32_to_cpu(*data) != blk) {
- ext4_warning(sb, __func__,
- "reserved block %llu"
+ ext4_warning(sb, "reserved block %llu"
" not at offset %ld",
blk,
(long)(data - (__le32 *)dind->b_data));
* important part is that the new block and inode counts are in the backup
* superblocks, and the location of the new group metadata in the GDT backups.
*
- * We do not need lock_super() for this, because these blocks are not
- * otherwise touched by the filesystem code when it is mounted. We don't
- * need to worry about last changing from sbi->s_groups_count, because the
- * worst that can happen is that we do not copy the full number of backups
- * at this time. The resize which changed s_groups_count will backup again.
+ * We do not need take the s_resize_lock for this, because these
+ * blocks are not otherwise touched by the filesystem code when it is
+ * mounted. We don't need to worry about last changing from
+ * sbi->s_groups_count, because the worst that can happen is that we
+ * do not copy the full number of backups at this time. The resize
+ * which changed s_groups_count will backup again.
*/
static void update_backups(struct super_block *sb,
int blk_off, char *data, int size)
*/
exit_err:
if (err) {
- ext4_warning(sb, __func__,
- "can't update backup for group %u (err %d), "
+ ext4_warning(sb, "can't update backup for group %u (err %d), "
"forcing fsck on next reboot", group, err);
sbi->s_mount_state &= ~EXT4_VALID_FS;
sbi->s_es->s_state &= cpu_to_le16(~EXT4_VALID_FS);
struct inode *inode = NULL;
handle_t *handle;
int gdb_off, gdb_num;
- int num_grp_locked = 0;
int err, err2;
gdb_num = input->group / EXT4_DESC_PER_BLOCK(sb);
if (gdb_off == 0 && !EXT4_HAS_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
- ext4_warning(sb, __func__,
- "Can't resize non-sparse filesystem further");
+ ext4_warning(sb, "Can't resize non-sparse filesystem further");
return -EPERM;
}
if (ext4_blocks_count(es) + input->blocks_count <
ext4_blocks_count(es)) {
- ext4_warning(sb, __func__, "blocks_count overflow");
+ ext4_warning(sb, "blocks_count overflow");
return -EINVAL;
}
if (le32_to_cpu(es->s_inodes_count) + EXT4_INODES_PER_GROUP(sb) <
le32_to_cpu(es->s_inodes_count)) {
- ext4_warning(sb, __func__, "inodes_count overflow");
+ ext4_warning(sb, "inodes_count overflow");
return -EINVAL;
}
if (!EXT4_HAS_COMPAT_FEATURE(sb,
EXT4_FEATURE_COMPAT_RESIZE_INODE)
|| !le16_to_cpu(es->s_reserved_gdt_blocks)) {
- ext4_warning(sb, __func__,
+ ext4_warning(sb,
"No reserved GDT blocks, can't resize");
return -EPERM;
}
inode = ext4_iget(sb, EXT4_RESIZE_INO);
if (IS_ERR(inode)) {
- ext4_warning(sb, __func__,
- "Error opening resize inode");
+ ext4_warning(sb, "Error opening resize inode");
return PTR_ERR(inode);
}
}
goto exit_put;
}
- lock_super(sb);
+ mutex_lock(&sbi->s_resize_lock);
if (input->group != sbi->s_groups_count) {
- ext4_warning(sb, __func__,
- "multiple resizers run on filesystem!");
+ ext4_warning(sb, "multiple resizers run on filesystem!");
err = -EBUSY;
goto exit_journal;
}
/*
* OK, now we've set up the new group. Time to make it active.
*
- * Current kernels don't lock all allocations via lock_super(),
+ * We do not lock all allocations via s_resize_lock
* so we have to be safe wrt. concurrent accesses the group
* data. So we need to be careful to set all of the relevant
* group descriptor data etc. *before* we enable the group.
* using the new disk blocks.
*/
- num_grp_locked = ext4_mb_get_buddy_cache_lock(sb, input->group);
/* Update group descriptor block for new group */
gdp = (struct ext4_group_desc *)((char *)primary->b_data +
gdb_off * EXT4_DESC_SIZE(sb));
* descriptor
*/
err = ext4_mb_add_groupinfo(sb, input->group, gdp);
- if (err) {
- ext4_mb_put_buddy_cache_lock(sb, input->group, num_grp_locked);
+ if (err)
goto exit_journal;
- }
/*
* Make the new blocks and inodes valid next. We do this before
*
* The precise rules we use are:
*
- * * Writers of s_groups_count *must* hold lock_super
+ * * Writers of s_groups_count *must* hold s_resize_lock
* AND
* * Writers must perform a smp_wmb() after updating all dependent
* data and before modifying the groups count
*
- * * Readers must hold lock_super() over the access
+ * * Readers must hold s_resize_lock over the access
* OR
* * Readers must perform an smp_rmb() after reading the groups count
* and before reading any dependent data.
/* Update the global fs size fields */
sbi->s_groups_count++;
- ext4_mb_put_buddy_cache_lock(sb, input->group, num_grp_locked);
ext4_handle_dirty_metadata(handle, NULL, primary);
sb->s_dirt = 1;
exit_journal:
- unlock_super(sb);
+ mutex_unlock(&sbi->s_resize_lock);
if ((err2 = ext4_journal_stop(handle)) && !err)
err = err2;
if (!err) {
/* We don't need to worry about locking wrt other resizers just
* yet: we're going to revalidate es->s_blocks_count after
- * taking lock_super() below. */
+ * taking the s_resize_lock below. */
o_blocks_count = ext4_blocks_count(es);
o_groups_count = EXT4_SB(sb)->s_groups_count;
" too large to resize to %llu blocks safely\n",
sb->s_id, n_blocks_count);
if (sizeof(sector_t) < 8)
- ext4_warning(sb, __func__, "CONFIG_LBD not enabled");
+ ext4_warning(sb, "CONFIG_LBDAF not enabled");
return -EINVAL;
}
if (n_blocks_count < o_blocks_count) {
- ext4_warning(sb, __func__,
- "can't shrink FS - resize aborted");
+ ext4_warning(sb, "can't shrink FS - resize aborted");
return -EBUSY;
}
ext4_get_group_no_and_offset(sb, o_blocks_count, &group, &last);
if (last == 0) {
- ext4_warning(sb, __func__,
- "need to use ext2online to resize further");
+ ext4_warning(sb, "need to use ext2online to resize further");
return -EPERM;
}
add = EXT4_BLOCKS_PER_GROUP(sb) - last;
if (o_blocks_count + add < o_blocks_count) {
- ext4_warning(sb, __func__, "blocks_count overflow");
+ ext4_warning(sb, "blocks_count overflow");
return -EINVAL;
}
add = n_blocks_count - o_blocks_count;
if (o_blocks_count + add < n_blocks_count)
- ext4_warning(sb, __func__,
- "will only finish group (%llu"
- " blocks, %u new)",
+ ext4_warning(sb, "will only finish group (%llu blocks, %u new)",
o_blocks_count + add, add);
/* See if the device is actually as big as what was requested */
bh = sb_bread(sb, o_blocks_count + add - 1);
if (!bh) {
- ext4_warning(sb, __func__,
- "can't read last block, resize aborted");
+ ext4_warning(sb, "can't read last block, resize aborted");
return -ENOSPC;
}
brelse(bh);
handle = ext4_journal_start_sb(sb, 3);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
- ext4_warning(sb, __func__, "error %d on journal start", err);
+ ext4_warning(sb, "error %d on journal start", err);
goto exit_put;
}
- lock_super(sb);
+ mutex_lock(&EXT4_SB(sb)->s_resize_lock);
if (o_blocks_count != ext4_blocks_count(es)) {
- ext4_warning(sb, __func__,
- "multiple resizers run on filesystem!");
- unlock_super(sb);
+ ext4_warning(sb, "multiple resizers run on filesystem!");
+ mutex_unlock(&EXT4_SB(sb)->s_resize_lock);
ext4_journal_stop(handle);
err = -EBUSY;
goto exit_put;
if ((err = ext4_journal_get_write_access(handle,
EXT4_SB(sb)->s_sbh))) {
- ext4_warning(sb, __func__,
- "error %d on journal write access", err);
- unlock_super(sb);
+ ext4_warning(sb, "error %d on journal write access", err);
+ mutex_unlock(&EXT4_SB(sb)->s_resize_lock);
ext4_journal_stop(handle);
goto exit_put;
}
ext4_blocks_count_set(es, o_blocks_count + add);
ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh);
sb->s_dirt = 1;
- unlock_super(sb);
+ mutex_unlock(&EXT4_SB(sb)->s_resize_lock);
ext4_debug("freeing blocks %llu through %llu\n", o_blocks_count,
o_blocks_count + add);
/* We add the blocks to the bitmap and set the group need init bit */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff