/*
* closefs.c --- close an ext2 filesystem
- *
+ *
* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
*
* %Begin-Header%
- * This file may be redistributed under the terms of the GNU Public
- * License.
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
* %End-Header%
*/
+#include "config.h"
#include <stdio.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#include "ext2_fs.h"
#include "ext2fsP.h"
-static int test_root(int a, int b)
+static int test_root(unsigned int a, unsigned int b)
{
- if (a == 0)
- return 1;
while (1) {
- if (a == 1)
+ if (a < b)
+ return 0;
+ if (a == b)
return 1;
if (a % b)
return 0;
}
}
-int ext2fs_bg_has_super(ext2_filsys fs, int group_block)
+int ext2fs_bg_has_super(ext2_filsys fs, dgrp_t group)
{
- if (!(fs->super->s_feature_ro_compat &
- EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
+ if (group == 0)
return 1;
-
- if (test_root(group_block, 3) || (test_root(group_block, 5)) ||
- test_root(group_block, 7))
+ if (ext2fs_has_feature_sparse_super2(fs->super)) {
+ if (group == fs->super->s_backup_bgs[0] ||
+ group == fs->super->s_backup_bgs[1])
+ return 1;
+ return 0;
+ }
+ if ((group <= 1) || !ext2fs_has_feature_sparse_super(fs->super))
+ return 1;
+ if (!(group & 1))
+ return 0;
+ if (test_root(group, 3) || (test_root(group, 5)) ||
+ test_root(group, 7))
return 1;
return 0;
}
-int ext2fs_super_and_bgd_loc(ext2_filsys fs,
- dgrp_t group,
- blk_t *ret_super_blk,
- blk_t *ret_old_desc_blk,
- blk_t *ret_new_desc_blk,
- int *ret_meta_bg)
+/*
+ * ext2fs_super_and_bgd_loc2()
+ * @fs: ext2 fs pointer
+ * @group given block group
+ * @ret_super_blk: if !NULL, returns super block location
+ * @ret_old_desc_blk: if !NULL, returns location of the old block
+ * group descriptor
+ * @ret_new_desc_blk: if !NULL, returns location of meta_bg block
+ * group descriptor
+ * @ret_used_blks: if !NULL, returns number of blocks used by
+ * super block and group_descriptors.
+ *
+ * Returns errcode_t of 0
+ */
+errcode_t ext2fs_super_and_bgd_loc2(ext2_filsys fs,
+ dgrp_t group,
+ blk64_t *ret_super_blk,
+ blk64_t *ret_old_desc_blk,
+ blk64_t *ret_new_desc_blk,
+ blk_t *ret_used_blks)
{
- blk_t group_block, super_blk = 0, old_desc_blk = 0, new_desc_blk = 0;
+ blk64_t group_block, super_blk = 0, old_desc_blk = 0, new_desc_blk = 0;
unsigned int meta_bg, meta_bg_size;
- int numblocks, has_super;
- int old_desc_blocks;
+ blk_t numblocks = 0;
+ blk64_t old_desc_blocks;
+ int has_super;
- group_block = ext2fs_group_first_block(fs, group);
+ group_block = ext2fs_group_first_block2(fs, group);
+ if (group_block == 0 && fs->blocksize == 1024)
+ group_block = 1; /* Deal with 1024 blocksize && bigalloc */
- if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
+ if (ext2fs_has_feature_meta_bg(fs->super))
old_desc_blocks = fs->super->s_first_meta_bg;
else
- old_desc_blocks =
+ old_desc_blocks =
fs->desc_blocks + fs->super->s_reserved_gdt_blocks;
- if (group == fs->group_desc_count-1) {
- numblocks = (fs->super->s_blocks_count -
- fs->super->s_first_data_block) %
- fs->super->s_blocks_per_group;
- if (!numblocks)
- numblocks = fs->super->s_blocks_per_group;
- } else
- numblocks = fs->super->s_blocks_per_group;
-
has_super = ext2fs_bg_has_super(fs, group);
if (has_super) {
super_blk = group_block;
- numblocks--;
+ numblocks++;
}
- meta_bg_size = (fs->blocksize / sizeof (struct ext2_group_desc));
+ meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
meta_bg = group / meta_bg_size;
- if (!(fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) ||
+ if (!ext2fs_has_feature_meta_bg(fs->super) ||
(meta_bg < fs->super->s_first_meta_bg)) {
if (has_super) {
old_desc_blk = group_block + 1;
- numblocks -= old_desc_blocks;
+ numblocks += old_desc_blocks;
}
} else {
if (((group % meta_bg_size) == 0) ||
if (has_super)
has_super = 1;
new_desc_blk = group_block + has_super;
- numblocks--;
+ numblocks++;
}
}
-
- numblocks -= 2 + fs->inode_blocks_per_group;
if (ret_super_blk)
*ret_super_blk = super_blk;
*ret_old_desc_blk = old_desc_blk;
if (ret_new_desc_blk)
*ret_new_desc_blk = new_desc_blk;
- if (ret_meta_bg)
- *ret_meta_bg = meta_bg;
- return (numblocks);
+ if (ret_used_blks)
+ *ret_used_blks = numblocks;
+
+ return 0;
}
+/*
+ * This function returns the location of the superblock, block group
+ * descriptors for a given block group. It currently returns the
+ * number of free blocks assuming that inode table and allocation
+ * bitmaps will be in the group. This is not necessarily the case
+ * when the flex_bg feature is enabled, so callers should take care!
+ * It was only really intended for use by mke2fs, and even there it's
+ * not that useful.
+ *
+ * The ext2fs_super_and_bgd_loc2() function is 64-bit block number
+ * capable and returns the number of blocks used by super block and
+ * group descriptors.
+ */
+int ext2fs_super_and_bgd_loc(ext2_filsys fs,
+ dgrp_t group,
+ blk_t *ret_super_blk,
+ blk_t *ret_old_desc_blk,
+ blk_t *ret_new_desc_blk,
+ int *ret_meta_bg)
+{
+ blk64_t ret_super_blk2;
+ blk64_t ret_old_desc_blk2;
+ blk64_t ret_new_desc_blk2;
+ blk_t ret_used_blks;
+ blk_t numblocks;
+ unsigned int meta_bg_size;
+
+ ext2fs_super_and_bgd_loc2(fs, group, &ret_super_blk2,
+ &ret_old_desc_blk2,
+ &ret_new_desc_blk2,
+ &ret_used_blks);
+
+ numblocks = ext2fs_group_blocks_count(fs, group);
+
+ if (ret_super_blk)
+ *ret_super_blk = (blk_t)ret_super_blk2;
+ if (ret_old_desc_blk)
+ *ret_old_desc_blk = (blk_t)ret_old_desc_blk2;
+ if (ret_new_desc_blk)
+ *ret_new_desc_blk = (blk_t)ret_new_desc_blk2;
+ if (ret_meta_bg) {
+ meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super);
+ *ret_meta_bg = group / meta_bg_size;
+ }
+
+ numblocks -= 2 + fs->inode_blocks_per_group + ret_used_blks;
+
+ return numblocks;
+}
/*
* This function forces out the primary superblock. We need to only
errcode_t retval;
if (!fs->io->manager->write_byte || !fs->orig_super) {
+ fallback:
io_channel_set_blksize(fs->io, SUPERBLOCK_OFFSET);
- retval = io_channel_write_blk(fs->io, 1, -SUPERBLOCK_SIZE,
+ retval = io_channel_write_blk64(fs->io, 1, -SUPERBLOCK_SIZE,
super);
io_channel_set_blksize(fs->io, fs->blocksize);
return retval;
retval = io_channel_write_byte(fs->io,
SUPERBLOCK_OFFSET + (2 * write_idx), size,
new_super + write_idx);
+ if (retval == EXT2_ET_UNIMPLEMENTED)
+ goto fallback;
if (retval)
return retval;
}
}
static errcode_t write_backup_super(ext2_filsys fs, dgrp_t group,
- blk_t group_block,
+ blk64_t group_block,
struct ext2_super_block *super_shadow)
{
+ errcode_t retval;
dgrp_t sgrp = group;
-
+
if (sgrp > ((1 << 16) - 1))
sgrp = (1 << 16) - 1;
-#ifdef WORDS_BIGENDIAN
- super_shadow->s_block_group_nr = ext2fs_swab16(sgrp);
-#else
- fs->super->s_block_group_nr = sgrp;
-#endif
- return io_channel_write_blk(fs->io, group_block, -SUPERBLOCK_SIZE,
+ super_shadow->s_block_group_nr = ext2fs_cpu_to_le16(sgrp);
+
+ retval = ext2fs_superblock_csum_set(fs, super_shadow);
+ if (retval)
+ return retval;
+
+ return io_channel_write_blk64(fs->io, group_block, -SUPERBLOCK_SIZE,
super_shadow);
}
-
errcode_t ext2fs_flush(ext2_filsys fs)
{
- dgrp_t i,j;
+ return ext2fs_flush2(fs, 0);
+}
+
+errcode_t ext2fs_flush2(ext2_filsys fs, int flags)
+{
+ dgrp_t i;
errcode_t retval;
unsigned long fs_state;
+ __u32 feature_incompat;
struct ext2_super_block *super_shadow = 0;
- struct ext2_group_desc *group_shadow = 0;
- struct ext2_group_desc *s, *t;
+ struct opaque_ext2_group_desc *group_shadow = 0;
+#ifdef WORDS_BIGENDIAN
+ struct ext2_group_desc *gdp;
+ dgrp_t j;
+#endif
char *group_ptr;
- int old_desc_blocks;
-
+ blk64_t old_desc_blocks;
+ struct ext2fs_numeric_progress_struct progress;
+
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+ if ((fs->flags & EXT2_FLAG_SUPER_ONLY) == 0 &&
+ !ext2fs_has_feature_journal_dev(fs->super) &&
+ fs->group_desc == NULL)
+ return EXT2_ET_NO_GDESC;
+
fs_state = fs->super->s_state;
+ feature_incompat = fs->super->s_feature_incompat;
fs->super->s_wtime = fs->now ? fs->now : time(NULL);
fs->super->s_block_group_nr = 0;
-#ifdef WORDS_BIGENDIAN
- retval = EXT2_ET_NO_MEMORY;
- retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super_shadow);
- if (retval)
- goto errout;
- retval = ext2fs_get_mem((size_t)(fs->blocksize * fs->desc_blocks),
- &group_shadow);
- if (retval)
- goto errout;
- memset(group_shadow, 0, (size_t) fs->blocksize *
- fs->desc_blocks);
-
- /* swap the group descriptors */
- for (j=0, s=fs->group_desc, t=group_shadow;
- j < fs->group_desc_count; j++, t++, s++) {
- *t = *s;
- ext2fs_swap_group_desc(t);
+
+ /*
+ * If the write_bitmaps() function is present, call it to
+ * flush the bitmaps. This is done this way so that a simple
+ * program that doesn't mess with the bitmaps doesn't need to
+ * drag in the bitmaps.c code.
+ *
+ * Bitmap checksums live in the group descriptor, so the
+ * bitmaps need to be written before the descriptors.
+ */
+ if (fs->write_bitmaps) {
+ retval = fs->write_bitmaps(fs);
+ if (retval)
+ goto errout;
}
-#else
- super_shadow = fs->super;
- group_shadow = fs->group_desc;
-#endif
-
+
/*
* Set the state of the FS to be non-valid. (The state has
* already been backed up earlier, and will be restored after
* we write out the backup superblocks.)
*/
fs->super->s_state &= ~EXT2_VALID_FS;
+ ext2fs_clear_feature_journal_needs_recovery(fs->super);
+
+ /* Byte swap the superblock and the group descriptors if necessary */
#ifdef WORDS_BIGENDIAN
- *super_shadow = *fs->super;
+ retval = EXT2_ET_NO_MEMORY;
+ retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super_shadow);
+ if (retval)
+ goto errout;
+ memcpy(super_shadow, fs->super, sizeof(struct ext2_super_block));
ext2fs_swap_super(super_shadow);
+
+ if (((fs->flags & EXT2_FLAG_SUPER_ONLY) == 0) &&
+ !ext2fs_has_feature_journal_dev(fs->super)) {
+ retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
+ &group_shadow);
+ if (retval)
+ goto errout;
+ memcpy(group_shadow, fs->group_desc, (size_t) fs->blocksize *
+ fs->desc_blocks);
+
+ for (j = 0; j < fs->group_desc_count; j++) {
+ gdp = ext2fs_group_desc(fs, group_shadow, j);
+ ext2fs_swap_group_desc2(fs, gdp);
+ }
+ }
+#else
+ super_shadow = fs->super;
+ group_shadow = fs->group_desc;
#endif
/*
* If this is an external journal device, don't write out the
* block group descriptors or any of the backup superblocks
*/
- if (fs->super->s_feature_incompat &
- EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
+ if (ext2fs_has_feature_journal_dev(fs->super))
goto write_primary_superblock_only;
/*
* superblocks and group descriptors.
*/
group_ptr = (char *) group_shadow;
- if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
+ if (ext2fs_has_feature_meta_bg(fs->super)) {
old_desc_blocks = fs->super->s_first_meta_bg;
- else
+ if (old_desc_blocks > fs->desc_blocks)
+ old_desc_blocks = fs->desc_blocks;
+ } else
old_desc_blocks = fs->desc_blocks;
+ if (fs->progress_ops && fs->progress_ops->init)
+ (fs->progress_ops->init)(fs, &progress, NULL,
+ fs->group_desc_count);
+
+
for (i = 0; i < fs->group_desc_count; i++) {
- blk_t super_blk, old_desc_blk, new_desc_blk;
- int meta_bg;
+ blk64_t super_blk, old_desc_blk, new_desc_blk;
- ext2fs_super_and_bgd_loc(fs, i, &super_blk, &old_desc_blk,
- &new_desc_blk, &meta_bg);
+ if (fs->progress_ops && fs->progress_ops->update)
+ (fs->progress_ops->update)(fs, &progress, i);
+ ext2fs_super_and_bgd_loc2(fs, i, &super_blk, &old_desc_blk,
+ &new_desc_blk, 0);
if (!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) &&i && super_blk) {
retval = write_backup_super(fs, i, super_blk,
}
if (fs->flags & EXT2_FLAG_SUPER_ONLY)
continue;
- if ((old_desc_blk) &&
+ if ((old_desc_blk) &&
(!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) || (i == 0))) {
- retval = io_channel_write_blk(fs->io,
+ retval = io_channel_write_blk64(fs->io,
old_desc_blk, old_desc_blocks, group_ptr);
if (retval)
goto errout;
}
if (new_desc_blk) {
- retval = io_channel_write_blk(fs->io, new_desc_blk,
+ int meta_bg = i / EXT2_DESC_PER_BLOCK(fs->super);
+
+ retval = io_channel_write_blk64(fs->io, new_desc_blk,
1, group_ptr + (meta_bg*fs->blocksize));
if (retval)
goto errout;
}
}
- /*
- * If the write_bitmaps() function is present, call it to
- * flush the bitmaps. This is done this way so that a simple
- * program that doesn't mess with the bitmaps doesn't need to
- * drag in the bitmaps.c code.
- */
- if (fs->write_bitmaps) {
- retval = fs->write_bitmaps(fs);
- if (retval)
- goto errout;
- }
+ if (fs->progress_ops && fs->progress_ops->close)
+ (fs->progress_ops->close)(fs, &progress, NULL);
write_primary_superblock_only:
/*
fs->super->s_block_group_nr = 0;
fs->super->s_state = fs_state;
+ fs->super->s_feature_incompat = feature_incompat;
#ifdef WORDS_BIGENDIAN
*super_shadow = *fs->super;
ext2fs_swap_super(super_shadow);
#endif
- retval = io_channel_flush(fs->io);
+ retval = ext2fs_superblock_csum_set(fs, super_shadow);
+ if (retval)
+ return retval;
+
+ if (!(flags & EXT2_FLAG_FLUSH_NO_SYNC)) {
+ retval = io_channel_flush(fs->io);
+ if (retval)
+ goto errout;
+ }
retval = write_primary_superblock(fs, super_shadow);
if (retval)
goto errout;
fs->flags &= ~EXT2_FLAG_DIRTY;
- retval = io_channel_flush(fs->io);
+ if (!(flags & EXT2_FLAG_FLUSH_NO_SYNC)) {
+ retval = io_channel_flush(fs->io);
+ if (retval)
+ goto errout;
+ }
errout:
fs->super->s_state = fs_state;
#ifdef WORDS_BIGENDIAN
return retval;
}
+errcode_t ext2fs_close_free(ext2_filsys *fs_ptr)
+{
+ errcode_t ret;
+ ext2_filsys fs = *fs_ptr;
+
+ ret = ext2fs_close2(fs, 0);
+ if (ret)
+ ext2fs_free(fs);
+ *fs_ptr = NULL;
+ return ret;
+}
+
errcode_t ext2fs_close(ext2_filsys fs)
{
+ return ext2fs_close2(fs, 0);
+}
+
+errcode_t ext2fs_close2(ext2_filsys fs, int flags)
+{
errcode_t retval;
-
+ int meta_blks;
+ io_stats stats = 0;
+
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
- if (fs->flags & EXT2_FLAG_DIRTY) {
- retval = ext2fs_flush(fs);
+ if (fs->write_bitmaps) {
+ retval = fs->write_bitmaps(fs);
if (retval)
return retval;
}
- if (fs->write_bitmaps) {
- retval = fs->write_bitmaps(fs);
+ if (fs->super->s_kbytes_written &&
+ fs->io->manager->get_stats)
+ fs->io->manager->get_stats(fs->io, &stats);
+ if (stats && stats->bytes_written && (fs->flags & EXT2_FLAG_RW)) {
+ fs->super->s_kbytes_written += stats->bytes_written >> 10;
+ meta_blks = fs->desc_blocks + 1;
+ if (!(fs->flags & EXT2_FLAG_SUPER_ONLY))
+ fs->super->s_kbytes_written += meta_blks /
+ (fs->blocksize / 1024);
+ if ((fs->flags & EXT2_FLAG_DIRTY) == 0)
+ fs->flags |= EXT2_FLAG_SUPER_ONLY | EXT2_FLAG_DIRTY;
+ }
+ if (fs->flags & EXT2_FLAG_DIRTY) {
+ retval = ext2fs_flush2(fs, flags);
if (retval)
return retval;
}
+
+ retval = ext2fs_mmp_stop(fs);
+ if (retval)
+ return retval;
+
ext2fs_free(fs);
return 0;
}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff