#include "config.h"
#include <stdio.h>
#include <string.h>
+#include <assert.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "ext2_fs.h"
#include "e2p/e2p.h"
#include "ext2fs.h"
-#include "jfs_user.h"
+
+#include "kernel-jbd.h"
/*
* This function automatically sets up the journal superblock and
* returns it as an allocated block.
*/
-errcode_t ext2fs_create_journal_superblock(ext2_filsys fs,
- __u32 num_blocks, int flags,
- char **ret_jsb)
+errcode_t ext2fs_create_journal_superblock2(ext2_filsys fs,
+ struct ext2fs_journal_params *jparams,
+ int flags, char **ret_jsb)
{
errcode_t retval;
journal_superblock_t *jsb;
- if (num_blocks < 1024)
+ if (jparams->num_journal_blocks < JBD2_MIN_JOURNAL_BLOCKS)
return EXT2_ET_JOURNAL_TOO_SMALL;
if ((retval = ext2fs_get_mem(fs->blocksize, &jsb)))
memset (jsb, 0, fs->blocksize);
- jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER);
+ jsb->s_header.h_magic = htonl(JBD2_MAGIC_NUMBER);
if (flags & EXT2_MKJOURNAL_V1_SUPER)
- jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V1);
+ jsb->s_header.h_blocktype = htonl(JBD2_SUPERBLOCK_V1);
else
- jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V2);
+ jsb->s_header.h_blocktype = htonl(JBD2_SUPERBLOCK_V2);
jsb->s_blocksize = htonl(fs->blocksize);
- jsb->s_maxlen = htonl(num_blocks);
+ jsb->s_maxlen = htonl(jparams->num_journal_blocks + jparams->num_fc_blocks);
jsb->s_nr_users = htonl(1);
jsb->s_first = htonl(1);
jsb->s_sequence = htonl(1);
+ jsb->s_num_fc_blks = htonl(jparams->num_fc_blocks);
memcpy(jsb->s_uuid, fs->super->s_uuid, sizeof(fs->super->s_uuid));
/*
* If we're creating an external journal device, we need to
* adjust these fields.
*/
- if (fs->super->s_feature_incompat &
- EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
+ if (ext2fs_has_feature_journal_dev(fs->super)) {
jsb->s_nr_users = 0;
- if (fs->blocksize == 1024)
- jsb->s_first = htonl(3);
- else
- jsb->s_first = htonl(2);
+ jsb->s_first = htonl(ext2fs_journal_sb_start(fs->blocksize) + 1);
}
*ret_jsb = (char *) jsb;
return 0;
}
+errcode_t ext2fs_create_journal_superblock(ext2_filsys fs, __u32 num_blocks,
+ int flags, char **ret_sb)
+{
+ struct ext2fs_journal_params jparams;
+
+ jparams.num_journal_blocks = num_blocks;
+ jparams.num_fc_blocks = 0;
+
+ return ext2fs_create_journal_superblock2(fs, &jparams, flags, ret_sb);
+}
+
/*
* This function writes a journal using POSIX routines. It is used
* for creating external journals and creating journals on live
* filesystems.
*/
static errcode_t write_journal_file(ext2_filsys fs, char *filename,
- blk_t num_blocks, int flags)
+ struct ext2fs_journal_params *jparams,
+ int flags)
{
errcode_t retval;
char *buf = 0;
int fd, ret_size;
blk_t i;
- if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags,
+ if ((retval = ext2fs_create_journal_superblock2(fs, jparams, flags,
&buf)))
return retval;
if (flags & EXT2_MKJOURNAL_LAZYINIT)
goto success;
- for (i = 1; i < num_blocks; i++) {
+ for (i = 1; i < jparams->num_journal_blocks + jparams->num_fc_blocks; i++) {
ret_size = write(fd, buf, fs->blocksize);
if (ret_size < 0) {
retval = errno;
* attempt to free the static zeroizing buffer. (This is to keep
* programs that check for memory leaks happy.)
*/
-#define STRIDE_LENGTH 8
+#define MAX_STRIDE_LENGTH (4194304 / (int) fs->blocksize)
errcode_t ext2fs_zero_blocks2(ext2_filsys fs, blk64_t blk, int num,
blk64_t *ret_blk, int *ret_count)
{
int j, count;
- static char *buf;
+ static void *buf;
+ static int stride_length;
errcode_t retval;
/* If fs is null, clean up the static buffer and return */
if (buf) {
free(buf);
buf = 0;
+ stride_length = 0;
}
return 0;
}
+
+ /* Deal with zeroing less than 1 block */
+ if (num <= 0)
+ return 0;
+
+ /* Try a zero out command, if supported */
+ retval = io_channel_zeroout(fs->io, blk, num);
+ if (retval == 0)
+ return 0;
+
/* Allocate the zeroizing buffer if necessary */
- if (!buf) {
- buf = malloc(fs->blocksize * STRIDE_LENGTH);
- if (!buf)
- return ENOMEM;
- memset(buf, 0, fs->blocksize * STRIDE_LENGTH);
+ if (num > stride_length && stride_length < MAX_STRIDE_LENGTH) {
+ void *p;
+ int new_stride = num;
+
+ if (new_stride > MAX_STRIDE_LENGTH)
+ new_stride = MAX_STRIDE_LENGTH;
+ p = realloc(buf, fs->blocksize * new_stride);
+ if (!p)
+ return EXT2_ET_NO_MEMORY;
+ buf = p;
+ stride_length = new_stride;
+ memset(buf, 0, fs->blocksize * stride_length);
}
/* OK, do the write loop */
j=0;
while (j < num) {
- if (blk % STRIDE_LENGTH) {
- count = STRIDE_LENGTH - (blk % STRIDE_LENGTH);
+ if (blk % stride_length) {
+ count = stride_length - (blk % stride_length);
if (count > (num - j))
count = num - j;
} else {
count = num - j;
- if (count > STRIDE_LENGTH)
- count = STRIDE_LENGTH;
+ if (count > stride_length)
+ count = stride_length;
}
retval = io_channel_write_blk64(fs->io, blk, count, buf);
if (retval) {
}
/*
- * Helper function for creating the journal using direct I/O routines
- */
-struct mkjournal_struct {
- int num_blocks;
- int newblocks;
- blk64_t goal;
- blk64_t blk_to_zero;
- int zero_count;
- int flags;
- char *buf;
- errcode_t err;
-};
-
-static int mkjournal_proc(ext2_filsys fs,
- blk64_t *blocknr,
- e2_blkcnt_t blockcnt,
- blk64_t ref_block EXT2FS_ATTR((unused)),
- int ref_offset EXT2FS_ATTR((unused)),
- void *priv_data)
-{
- struct mkjournal_struct *es = (struct mkjournal_struct *) priv_data;
- blk64_t new_blk;
- errcode_t retval;
-
- if (*blocknr) {
- es->goal = *blocknr;
- return 0;
- }
- if (blockcnt &&
- (EXT2FS_B2C(fs, es->goal) == EXT2FS_B2C(fs, es->goal+1)))
- new_blk = es->goal+1;
- else {
- es->goal &= ~EXT2FS_CLUSTER_MASK(fs);
- retval = ext2fs_new_block2(fs, es->goal, 0, &new_blk);
- if (retval) {
- es->err = retval;
- return BLOCK_ABORT;
- }
- ext2fs_block_alloc_stats2(fs, new_blk, +1);
- es->newblocks++;
- }
- if (blockcnt >= 0)
- es->num_blocks--;
-
- retval = 0;
- if (blockcnt <= 0)
- retval = io_channel_write_blk64(fs->io, new_blk, 1, es->buf);
- else if (!(es->flags & EXT2_MKJOURNAL_LAZYINIT)) {
- if (es->zero_count) {
- if ((es->blk_to_zero + es->zero_count == new_blk) &&
- (es->zero_count < 1024))
- es->zero_count++;
- else {
- retval = ext2fs_zero_blocks2(fs,
- es->blk_to_zero,
- es->zero_count,
- 0, 0);
- es->zero_count = 0;
- }
- }
- if (es->zero_count == 0) {
- es->blk_to_zero = new_blk;
- es->zero_count = 1;
- }
- }
-
- if (blockcnt == 0)
- memset(es->buf, 0, fs->blocksize);
-
- if (retval) {
- es->err = retval;
- return BLOCK_ABORT;
- }
- *blocknr = es->goal = new_blk;
-
- if (es->num_blocks == 0)
- return (BLOCK_CHANGED | BLOCK_ABORT);
- else
- return BLOCK_CHANGED;
-
-}
-
-/*
* Calculate the initial goal block to be roughly at the middle of the
* filesystem. Pick a group that has the largest number of free
* blocks.
group = ext2fs_group_of_blk2(fs, (ext2fs_blocks_count(fs->super) -
fs->super->s_first_data_block) / 2);
- log_flex = 1 << fs->super->s_log_groups_per_flex;
+ log_flex = 1U << fs->super->s_log_groups_per_flex;
if (fs->super->s_log_groups_per_flex && (group > log_flex)) {
group = group & ~(log_flex - 1);
while ((group < fs->group_desc_count) &&
* This function creates a journal using direct I/O routines.
*/
static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
- blk_t num_blocks, blk64_t goal, int flags)
+ struct ext2fs_journal_params *jparams,
+ blk64_t goal, int flags)
{
char *buf;
errcode_t retval;
struct ext2_inode inode;
unsigned long long inode_size;
- struct mkjournal_struct es;
+ int falloc_flags = EXT2_FALLOCATE_FORCE_INIT;
+ blk64_t zblk;
- if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags,
+ if ((retval = ext2fs_create_journal_superblock2(fs, jparams, flags,
&buf)))
return retval;
goto out2;
}
- es.num_blocks = num_blocks;
- es.newblocks = 0;
- es.buf = buf;
- es.err = 0;
- es.flags = flags;
- es.zero_count = 0;
- es.goal = (goal != ~0ULL) ? goal : get_midpoint_journal_block(fs);
+ if (goal == ~0ULL)
+ goal = get_midpoint_journal_block(fs);
- if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
+ if (ext2fs_has_feature_extents(fs->super))
inode.i_flags |= EXT4_EXTENTS_FL;
- if ((retval = ext2fs_write_inode(fs, journal_ino, &inode)))
- goto out2;
- }
-
- retval = ext2fs_block_iterate3(fs, journal_ino, BLOCK_FLAG_APPEND,
- 0, mkjournal_proc, &es);
- if (es.err) {
- retval = es.err;
- goto errout;
- }
- if (es.zero_count) {
- retval = ext2fs_zero_blocks2(fs, es.blk_to_zero,
- es.zero_count, 0, 0);
- if (retval)
- goto errout;
- }
- if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
- goto errout;
+ if (!(flags & EXT2_MKJOURNAL_LAZYINIT))
+ falloc_flags |= EXT2_FALLOCATE_ZERO_BLOCKS;
- inode_size = (unsigned long long)fs->blocksize * num_blocks;
- inode.i_size = inode_size & 0xFFFFFFFF;
- inode.i_size_high = (inode_size >> 32) & 0xFFFFFFFF;
- if (ext2fs_needs_large_file_feature(inode_size))
- fs->super->s_feature_ro_compat |=
- EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
- ext2fs_iblk_add_blocks(fs, &inode, es.newblocks);
+ inode_size = (unsigned long long)fs->blocksize *
+ (jparams->num_journal_blocks + jparams->num_fc_blocks);
inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
inode.i_links_count = 1;
inode.i_mode = LINUX_S_IFREG | 0600;
+ retval = ext2fs_inode_size_set(fs, &inode, inode_size);
+ if (retval)
+ goto out2;
+
+ retval = ext2fs_fallocate(fs, falloc_flags, journal_ino,
+ &inode, goal, 0,
+ jparams->num_journal_blocks + jparams->num_fc_blocks);
+ if (retval)
+ goto out2;
if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode)))
- goto errout;
- retval = 0;
+ goto out2;
+
+ retval = ext2fs_bmap2(fs, journal_ino, &inode, NULL, 0, 0, NULL, &zblk);
+ if (retval)
+ goto out2;
+
+ retval = io_channel_write_blk64(fs->io, zblk, 1, buf);
+ if (retval)
+ goto out2;
memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
fs->super->s_jnl_blocks[15] = inode.i_size_high;
fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
ext2fs_mark_super_dirty(fs);
-errout:
- ext2fs_zero_blocks2(0, 0, 0, 0, 0);
out2:
ext2fs_free_mem(&buf);
return retval;
* Find a reasonable journal file size (in blocks) given the number of blocks
* in the filesystem. For very small filesystems, it is not reasonable to
* have a journal that fills more than half of the filesystem.
+ *
+ * n.b. comments assume 4k blocks
*/
int ext2fs_default_journal_size(__u64 num_blocks)
{
if (num_blocks < 2048)
return -1;
- if (num_blocks < 32768)
- return (1024);
- if (num_blocks < 256*1024)
- return (4096);
- if (num_blocks < 512*1024)
- return (8192);
- if (num_blocks < 1024*1024)
- return (16384);
- return 32768;
+ if (num_blocks < 32768) /* 128 MB */
+ return (1024); /* 4 MB */
+ if (num_blocks < 256*1024) /* 1 GB */
+ return (4096); /* 16 MB */
+ if (num_blocks < 512*1024) /* 2 GB */
+ return (8192); /* 32 MB */
+ if (num_blocks < 4096*1024) /* 16 GB */
+ return (16384); /* 64 MB */
+ if (num_blocks < 8192*1024) /* 32 GB */
+ return (32768); /* 128 MB */
+ if (num_blocks < 16384*1024) /* 64 GB */
+ return (65536); /* 256 MB */
+ if (num_blocks < 32768*1024) /* 128 GB */
+ return (131072); /* 512 MB */
+ return 262144; /* 1 GB */
+}
+
+errcode_t ext2fs_get_journal_params(struct ext2fs_journal_params *params,
+ ext2_filsys fs)
+{
+ blk_t total_blks;
+ int ret;
+
+ memset(params, 0, sizeof(*params));
+ if (ext2fs_has_feature_journal_dev(fs->super)) {
+ total_blks = ext2fs_blocks_count(fs->super);
+ if (total_blks < JBD2_MIN_JOURNAL_BLOCKS)
+ return EXT2_ET_JOURNAL_TOO_SMALL;
+
+ if (!ext2fs_has_feature_fast_commit(fs->super)) {
+ params->num_journal_blocks = total_blks;
+ params->num_fc_blocks = 0;
+ return 0;
+ }
+ params->num_journal_blocks = ext2fs_blocks_count(fs->super) *
+ EXT2_JOURNAL_TO_FC_BLKS_RATIO /
+ (EXT2_JOURNAL_TO_FC_BLKS_RATIO + 1);
+ if (JBD2_MIN_JOURNAL_BLOCKS > params->num_journal_blocks)
+ params->num_journal_blocks = JBD2_MIN_JOURNAL_BLOCKS;
+ params->num_fc_blocks = total_blks - params->num_journal_blocks;
+ return 0;
+ }
+
+ ret = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super));
+ if (ret < 0)
+ return EXT2_ET_JOURNAL_TOO_SMALL;
+
+ params->num_journal_blocks = ret;
+ if (ext2fs_has_feature_fast_commit(fs->super))
+ params->num_fc_blocks = params->num_journal_blocks /
+ EXT2_JOURNAL_TO_FC_BLKS_RATIO;
+ return 0;
+}
+
+int ext2fs_journal_sb_start(int blocksize)
+{
+ if (blocksize == EXT2_MIN_BLOCK_SIZE)
+ return 2;
+ return 1;
}
/*
{
struct stat st;
errcode_t retval;
- char buf[1024];
+ char buf[SUPERBLOCK_SIZE];
journal_superblock_t *jsb;
int start;
__u32 i, nr_users;
return EXT2_ET_JOURNAL_NOT_BLOCK; /* Must be a block device */
/* Get the journal superblock */
- start = 1;
- if (journal_dev->blocksize == 1024)
- start++;
- if ((retval = io_channel_read_blk64(journal_dev->io, start, -1024,
+ start = ext2fs_journal_sb_start(journal_dev->blocksize);
+ if ((retval = io_channel_read_blk64(journal_dev->io, start,
+ -SUPERBLOCK_SIZE,
buf)))
return retval;
jsb = (journal_superblock_t *) buf;
- if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
- (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2)))
+ if ((jsb->s_header.h_magic != (unsigned) ntohl(JBD2_MAGIC_NUMBER)) ||
+ (jsb->s_header.h_blocktype != (unsigned) ntohl(JBD2_SUPERBLOCK_V2)))
return EXT2_ET_NO_JOURNAL_SB;
if (ntohl(jsb->s_blocksize) != (unsigned long) fs->blocksize)
/* Check and see if this filesystem has already been added */
nr_users = ntohl(jsb->s_nr_users);
+ if (nr_users > JBD2_USERS_MAX)
+ return EXT2_ET_CORRUPT_JOURNAL_SB;
for (i=0; i < nr_users; i++) {
if (memcmp(fs->super->s_uuid,
&jsb->s_users[i*16], 16) == 0)
}
/* Writeback the journal superblock */
- if ((retval = io_channel_write_blk64(journal_dev->io, start, -1024, buf)))
+ if ((retval = io_channel_write_blk64(journal_dev->io, start,
+ -SUPERBLOCK_SIZE, buf)))
return retval;
fs->super->s_journal_inum = 0;
fs->super->s_journal_dev = st.st_rdev;
memcpy(fs->super->s_journal_uuid, jsb->s_uuid,
sizeof(fs->super->s_journal_uuid));
- fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL;
+ memset(fs->super->s_jnl_blocks, 0, sizeof(fs->super->s_jnl_blocks));
+ ext2fs_set_feature_journal(fs->super);
ext2fs_mark_super_dirty(fs);
return 0;
}
* POSIX routines if the filesystem is mounted, or using direct I/O
* functions if it is not.
*/
-errcode_t ext2fs_add_journal_inode2(ext2_filsys fs, blk_t num_blocks,
+errcode_t ext2fs_add_journal_inode3(ext2_filsys fs, struct ext2fs_journal_params *jparams,
blk64_t goal, int flags)
{
errcode_t retval;
retval = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
close(fd);
if (retval)
- return retval;
+ return errno;
}
#endif
#endif
* filesystems is extremely rare these days... Ignore it. */
flags &= ~EXT2_MKJOURNAL_LAZYINIT;
- if ((retval = write_journal_file(fs, jfile, num_blocks, flags)))
+ if ((retval = write_journal_file(fs, jfile, jparams, flags)))
goto errout;
/* Get inode number of the journal file */
goto errout;
}
journal_ino = st.st_ino;
+ memset(fs->super->s_jnl_blocks, 0,
+ sizeof(fs->super->s_jnl_blocks));
} else {
if ((mount_flags & EXT2_MF_BUSY) &&
!(fs->flags & EXT2_FLAG_EXCLUSIVE)) {
}
journal_ino = EXT2_JOURNAL_INO;
if ((retval = write_journal_inode(fs, journal_ino,
- num_blocks, goal, flags)))
+ jparams, goal, flags)))
return retval;
}
fs->super->s_journal_dev = 0;
memset(fs->super->s_journal_uuid, 0,
sizeof(fs->super->s_journal_uuid));
- fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL;
+ ext2fs_set_feature_journal(fs->super);
ext2fs_mark_super_dirty(fs);
return 0;
return retval;
}
+errcode_t ext2fs_add_journal_inode2(ext2_filsys fs, blk_t num_blocks,
+ blk64_t goal, int flags)
+{
+ struct ext2fs_journal_params jparams;
+
+ jparams.num_journal_blocks = num_blocks;
+ jparams.num_fc_blocks = 0;
+
+ return ext2fs_add_journal_inode3(fs, &jparams, goal, flags);
+}
+
errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t num_blocks, int flags)
{
return ext2fs_add_journal_inode2(fs, num_blocks, ~0ULL, flags);
exit(1);
}
- retval = ext2fs_add_journal_inode(fs, 1024, 0);
+ retval = ext2fs_add_journal_inode(fs, JBD2_MIN_JOURNAL_BLOCKS, 0);
if (retval) {
com_err(argv[0], retval, "while adding journal to %s",
device_name);
if (retval) {
printf("Warning, had trouble writing out superblocks.\n");
}
- ext2fs_close(fs);
+ ext2fs_close_free(&fs);
exit(0);
}
projects / platform / upstream / e2fsprogs.git / blobdiff