/*
* NOTE! When we get the inode, we're the only people
* that have access to it, and as such there are no
* race conditions we have to worry about. The inode
* is not on the hash-lists, and it cannot be reached
* through the filesystem because the directory entry
* has been deleted earlier.
*
* HOWEVER: we must make sure that we get no aliases,
* which means that we have to call "clear_inode()"
* _before_ we mark the inode not in use in the inode
* bitmaps. Otherwise a newly created file might use
* the same inode number (not actually the same pointer
* though), and then we'd have two inodes sharing the
* same inode number and space on the harddisk.
*/
void ufs_free_inode (struct inode * inode)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
int is_directory;
unsigned ino, cg, bit;
UFSD("ENTER, ino %lu\n", inode->i_ino);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
ino = inode->i_ino;
lock_super (sb);
if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) {
ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino);
unlock_super (sb);
return;
}
cg = ufs_inotocg (ino);
bit = ufs_inotocgoff (ino);
ucpi = ufs_load_cylinder (sb, cg);
if (!ucpi) {
unlock_super (sb);
return;
}
ucg = ubh_get_ucg(UCPI_UBH(ucpi));
if (!ufs_cg_chkmagic(sb, ucg))
ufs_panic (sb, "ufs_free_fragments", "internal error, bad cg magic number");
ucg->cg_time = cpu_to_fs32(sb, get_seconds());
is_directory = S_ISDIR(inode->i_mode);
DQUOT_FREE_INODE(inode);
DQUOT_DROP(inode);
clear_inode (inode);
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
ufs_error(sb, "ufs_free_inode", "bit already cleared for inode %u", ino);
else {
ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
if (ino < ucpi->c_irotor)
ucpi->c_irotor = ino;
fs32_add(sb, &ucg->cg_cs.cs_nifree, 1);
uspi->cs_total.cs_nifree++;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cg).cs_nifree, 1);
if (is_directory) {
fs32_sub(sb, &ucg->cg_cs.cs_ndir, 1);
uspi->cs_total.cs_ndir--;
fs32_sub(sb, &UFS_SB(sb)->fs_cs(cg).cs_ndir, 1);
}
}
ubh_mark_buffer_dirty (USPI_UBH(uspi));
ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
if (sb->s_flags & MS_SYNCHRONOUS) {
ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi));
ubh_wait_on_buffer (UCPI_UBH(ucpi));
}
sb->s_dirt = 1;
unlock_super (sb);
UFSD("EXIT\n");
}
static u64 ufs_alloc_fragments(struct inode *inode, unsigned cgno,
u64 goal, unsigned count, int *err)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
unsigned oldcg, i, j, k, allocsize;
u64 result;
UFSD("ENTER, ino %lu, cgno %u, goal %llu, count %u\n",
inode->i_ino, cgno, (unsigned long long)goal, count);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
oldcg = cgno;
/*
* 1. searching on preferred cylinder group
*/
UFS_TEST_FREE_SPACE_CG
/*
* 2. quadratic rehash
*/
for (j = 1; j < uspi->s_ncg; j *= 2) {
cgno += j;
if (cgno >= uspi->s_ncg)
cgno -= uspi->s_ncg;
UFS_TEST_FREE_SPACE_CG
}
/*
* 3. brute force search
* We start at i = 2 ( 0 is checked at 1.step, 1 at 2.step )
*/
cgno = (oldcg + 1) % uspi->s_ncg;
for (j = 2; j < uspi->s_ncg; j++) {
cgno++;
if (cgno >= uspi->s_ncg)
cgno = 0;
UFS_TEST_FREE_SPACE_CG
}
UFSD("EXIT (FAILED)\n");
return 0;
cg_found:
ucpi = ufs_load_cylinder (sb, cgno);
if (!ucpi)
return 0;
ucg = ubh_get_ucg (UCPI_UBH(ucpi));
if (!ufs_cg_chkmagic(sb, ucg))
ufs_panic (sb, "ufs_alloc_fragments",
"internal error, bad magic number on cg %u", cgno);
ucg->cg_time = cpu_to_fs32(sb, get_seconds());
if (count == uspi->s_fpb) {
result = ufs_alloccg_block (inode, ucpi, goal, err);
if (result == INVBLOCK)
return 0;
goto succed;
}
for (allocsize = count; allocsize < uspi->s_fpb; allocsize++)
if (fs32_to_cpu(sb, ucg->cg_frsum[allocsize]) != 0)
break;
if (allocsize == uspi->s_fpb) {
result = ufs_alloccg_block (inode, ucpi, goal, err);
if (result == INVBLOCK)
return 0;
goal = ufs_dtogd(uspi, result);
for (i = count; i < uspi->s_fpb; i++)
ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, goal + i);
i = uspi->s_fpb - count;
fs32_add(sb, &ucg->cg_cs.cs_nffree, i);
uspi->cs_total.cs_nffree += i;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i);
fs32_add(sb, &ucg->cg_frsum[i], 1);
goto succed;
}
result = ufs_bitmap_search (sb, ucpi, goal, allocsize);
if (result == INVBLOCK)
return 0;
for (i = 0; i < count; i++)
ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, result + i);
fs32_sub(sb, &ucg->cg_cs.cs_nffree, count);
uspi->cs_total.cs_nffree -= count;
fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
fs32_sub(sb, &ucg->cg_frsum[allocsize], 1);
if (count != allocsize)
fs32_add(sb, &ucg->cg_frsum[allocsize - count], 1);
succed:
ubh_mark_buffer_dirty (USPI_UBH(uspi));
ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
if (sb->s_flags & MS_SYNCHRONOUS)
ubh_sync_block(UCPI_UBH(ucpi));
sb->s_dirt = 1;
result += cgno * uspi->s_fpg;
UFSD("EXIT3, result %llu\n", (unsigned long long)result);
return result;
}
/*
* There are two policies for allocating an inode. If the new inode is
* a directory, then a forward search is made for a block group with both
* free space and a low directory-to-inode ratio; if that fails, then of
* the groups with above-average free space, that group with the fewest
* directories already is chosen.
*
* For other inodes, search forward from the parent directory's block
* group to find a free inode.
*/
struct inode * ufs_new_inode(struct inode * dir, int mode)
{
struct super_block * sb;
struct ufs_sb_info * sbi;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
struct inode * inode;
unsigned cg, bit, i, j, start;
struct ufs_inode_info *ufsi;
int err = -ENOSPC;
UFSD("ENTER\n");
/* Cannot create files in a deleted directory */
if (!dir || !dir->i_nlink)
return ERR_PTR(-EPERM);
sb = dir->i_sb;
inode = new_inode(sb);
if (!inode)
return ERR_PTR(-ENOMEM);
ufsi = UFS_I(inode);
sbi = UFS_SB(sb);
uspi = sbi->s_uspi;
usb1 = ubh_get_usb_first(uspi);
lock_super (sb);
/*
* Try to place the inode in its parent directory
*/
i = ufs_inotocg(dir->i_ino);
if (sbi->fs_cs(i).cs_nifree) {
cg = i;
goto cg_found;
}
/*
* Use a quadratic hash to find a group with a free inode
*/
for ( j = 1; j < uspi->s_ncg; j <<= 1 ) {
i += j;
if (i >= uspi->s_ncg)
i -= uspi->s_ncg;
if (sbi->fs_cs(i).cs_nifree) {
cg = i;
goto cg_found;
}
}
/*
* That failed: try linear search for a free inode
*/
i = ufs_inotocg(dir->i_ino) + 1;
for (j = 2; j < uspi->s_ncg; j++) {
i++;
if (i >= uspi->s_ncg)
i = 0;
if (sbi->fs_cs(i).cs_nifree) {
cg = i;
goto cg_found;
}
}
goto failed;
cg_found:
ucpi = ufs_load_cylinder (sb, cg);
if (!ucpi) {
err = -EIO;
goto failed;
}
ucg = ubh_get_ucg(UCPI_UBH(ucpi));
if (!ufs_cg_chkmagic(sb, ucg))
ufs_panic (sb, "ufs_new_inode", "internal error, bad cg magic number");
start = ucpi->c_irotor;
bit = ubh_find_next_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, uspi->s_ipg, start);
if (!(bit < uspi->s_ipg)) {
bit = ubh_find_first_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, start);
if (!(bit < start)) {
ufs_error (sb, "ufs_new_inode",
"cylinder group %u corrupted - error in inode bitmap\n", cg);
err = -EIO;
goto failed;
}
}
UFSD("start = %u, bit = %u, ipg = %u\n", start, bit, uspi->s_ipg);
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
ubh_setbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
else {
ufs_panic (sb, "ufs_new_inode", "internal error");
err = -EIO;
goto failed;
}
if (uspi->fs_magic == UFS2_MAGIC) {
u32 initediblk = fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk);
if (bit + uspi->s_inopb > initediblk &&
initediblk < fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_niblk))
ufs2_init_inodes_chunk(sb, ucpi, ucg);
}
fs32_sub(sb, &ucg->cg_cs.cs_nifree, 1);
uspi->cs_total.cs_nifree--;
fs32_sub(sb, &sbi->fs_cs(cg).cs_nifree, 1);
if (S_ISDIR(mode)) {
fs32_add(sb, &ucg->cg_cs.cs_ndir, 1);
uspi->cs_total.cs_ndir++;
fs32_add(sb, &sbi->fs_cs(cg).cs_ndir, 1);
}
ubh_mark_buffer_dirty (USPI_UBH(uspi));
ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
if (sb->s_flags & MS_SYNCHRONOUS) {
ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi));
ubh_wait_on_buffer (UCPI_UBH(ucpi));
}
sb->s_dirt = 1;
inode->i_ino = cg * uspi->s_ipg + bit;
inode->i_mode = mode;
inode->i_uid = current->fsuid;
if (dir->i_mode & S_ISGID) {
inode->i_gid = dir->i_gid;
if (S_ISDIR(mode))
inode->i_mode |= S_ISGID;
} else
inode->i_gid = current->fsgid;
inode->i_blocks = 0;
inode->i_generation = 0;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
ufsi->i_flags = UFS_I(dir)->i_flags;
ufsi->i_lastfrag = 0;
ufsi->i_shadow = 0;
ufsi->i_osync = 0;
ufsi->i_oeftflag = 0;
ufsi->i_dir_start_lookup = 0;
memset(&ufsi->i_u1, 0, sizeof(ufsi->i_u1));
insert_inode_hash(inode);
mark_inode_dirty(inode);
if (uspi->fs_magic == UFS2_MAGIC) {
struct buffer_head *bh;
struct ufs2_inode *ufs2_inode;
/*
* setup birth date, we do it here because of there is no sense
* to hold it in struct ufs_inode_info, and lose 64 bit
*/
bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
if (!bh) {
ufs_warning(sb, "ufs_read_inode",
"unable to read inode %lu\n",
inode->i_ino);
err = -EIO;
goto fail_remove_inode;
}
lock_buffer(bh);
ufs2_inode = (struct ufs2_inode *)bh->b_data;
ufs2_inode += ufs_inotofsbo(inode->i_ino);
ufs2_inode->ui_birthtime = cpu_to_fs64(sb, CURRENT_TIME.tv_sec);
ufs2_inode->ui_birthnsec = cpu_to_fs32(sb, CURRENT_TIME.tv_nsec);
mark_buffer_dirty(bh);
unlock_buffer(bh);
if (sb->s_flags & MS_SYNCHRONOUS)
sync_dirty_buffer(bh);
brelse(bh);
}
unlock_super (sb);
if (DQUOT_ALLOC_INODE(inode)) {
DQUOT_DROP(inode);
err = -EDQUOT;
goto fail_without_unlock;
}
UFSD("allocating inode %lu\n", inode->i_ino);
UFSD("EXIT\n");
return inode;
fail_remove_inode:
unlock_super(sb);
fail_without_unlock:
inode->i_flags |= S_NOQUOTA;
inode->i_nlink = 0;
iput(inode);
UFSD("EXIT (FAILED): err %d\n", err);
return ERR_PTR(err);
failed:
unlock_super (sb);
make_bad_inode(inode);
iput (inode);
UFSD("EXIT (FAILED): err %d\n", err);
return ERR_PTR(err);
}
static int ufs_trunc_indirect (struct inode * inode, unsigned offset, __fs32 *p)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_buffer_head * ind_ubh;
__fs32 * ind;
unsigned indirect_block, i, tmp;
unsigned frag_to_free, free_count;
int retry;
UFSD("ENTER\n");
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
frag_to_free = 0;
free_count = 0;
retry = 0;
tmp = fs32_to_cpu(sb, *p);
if (!tmp)
return 0;
ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize);
if (tmp != fs32_to_cpu(sb, *p)) {
ubh_brelse (ind_ubh);
return 1;
}
if (!ind_ubh) {
*p = 0;
return 0;
}
indirect_block = (DIRECT_BLOCK > offset) ? (DIRECT_BLOCK - offset) : 0;
for (i = indirect_block; i < uspi->s_apb; i++) {
ind = ubh_get_addr32 (ind_ubh, i);
tmp = fs32_to_cpu(sb, *ind);
if (!tmp)
continue;
*ind = 0;
ubh_mark_buffer_dirty(ind_ubh);
if (free_count == 0) {
frag_to_free = tmp;
free_count = uspi->s_fpb;
} else if (free_count > 0 && frag_to_free == tmp - free_count)
free_count += uspi->s_fpb;
else {
ufs_free_blocks (inode, frag_to_free, free_count);
frag_to_free = tmp;
free_count = uspi->s_fpb;
}
mark_inode_dirty(inode);
}
if (free_count > 0) {
ufs_free_blocks (inode, frag_to_free, free_count);
}
for (i = 0; i < uspi->s_apb; i++)
if (*ubh_get_addr32(ind_ubh,i))
break;
if (i >= uspi->s_apb) {
tmp = fs32_to_cpu(sb, *p);
*p = 0;
ufs_free_blocks (inode, tmp, uspi->s_fpb);
mark_inode_dirty(inode);
ubh_bforget(ind_ubh);
ind_ubh = NULL;
}
if (IS_SYNC(inode) && ind_ubh && ubh_buffer_dirty(ind_ubh)) {
ubh_ll_rw_block(SWRITE, ind_ubh);
ubh_wait_on_buffer (ind_ubh);
}
ubh_brelse (ind_ubh);
UFSD("EXIT\n");
return retry;
}
static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
unsigned oldcount, unsigned newcount, int *err)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
unsigned cgno, fragno, fragoff, count, fragsize, i;
UFSD("ENTER, fragment %llu, oldcount %u, newcount %u\n",
(unsigned long long)fragment, oldcount, newcount);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first (uspi);
count = newcount - oldcount;
cgno = ufs_dtog(uspi, fragment);
if (fs32_to_cpu(sb, UFS_SB(sb)->fs_cs(cgno).cs_nffree) < count)
return 0;
if ((ufs_fragnum (fragment) + newcount) > uspi->s_fpb)
return 0;
ucpi = ufs_load_cylinder (sb, cgno);
if (!ucpi)
return 0;
ucg = ubh_get_ucg (UCPI_UBH(ucpi));
if (!ufs_cg_chkmagic(sb, ucg)) {
ufs_panic (sb, "ufs_add_fragments",
"internal error, bad magic number on cg %u", cgno);
return 0;
}
fragno = ufs_dtogd(uspi, fragment);
fragoff = ufs_fragnum (fragno);
for (i = oldcount; i < newcount; i++)
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i))
return 0;
/*
* Block can be extended
*/
ucg->cg_time = cpu_to_fs32(sb, get_seconds());
for (i = newcount; i < (uspi->s_fpb - fragoff); i++)
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i))
break;
fragsize = i - oldcount;
if (!fs32_to_cpu(sb, ucg->cg_frsum[fragsize]))
ufs_panic (sb, "ufs_add_fragments",
"internal error or corrupted bitmap on cg %u", cgno);
fs32_sub(sb, &ucg->cg_frsum[fragsize], 1);
if (fragsize != count)
fs32_add(sb, &ucg->cg_frsum[fragsize - count], 1);
for (i = oldcount; i < newcount; i++)
ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i);
fs32_sub(sb, &ucg->cg_cs.cs_nffree, count);
fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
uspi->cs_total.cs_nffree -= count;
ubh_mark_buffer_dirty (USPI_UBH(uspi));
ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
if (sb->s_flags & MS_SYNCHRONOUS)
ubh_sync_block(UCPI_UBH(ucpi));
sb->s_dirt = 1;
UFSD("EXIT, fragment %llu\n", (unsigned long long)fragment);
return fragment;
}
static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
{
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_super_block_third * usb3;
unsigned new_mount_opt, ufstype;
unsigned flags;
lock_ufs(sb);
lock_super(sb);
uspi = UFS_SB(sb)->s_uspi;
flags = UFS_SB(sb)->s_flags;
usb1 = ubh_get_usb_first(uspi);
usb3 = ubh_get_usb_third(uspi);
/*
* Allow the "check" option to be passed as a remount option.
* It is not possible to change ufstype option during remount
*/
ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
new_mount_opt = 0;
ufs_set_opt (new_mount_opt, ONERROR_LOCK);
if (!ufs_parse_options (data, &new_mount_opt)) {
unlock_super(sb);
unlock_ufs(sb);
return -EINVAL;
}
if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
new_mount_opt |= ufstype;
} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
printk("ufstype can't be changed during remount\n");
unlock_super(sb);
unlock_ufs(sb);
return -EINVAL;
}
if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
UFS_SB(sb)->s_mount_opt = new_mount_opt;
unlock_super(sb);
unlock_ufs(sb);
return 0;
}
/*
* fs was mouted as rw, remounting ro
*/
if (*mount_flags & MS_RDONLY) {
ufs_put_super_internal(sb);
usb1->fs_time = cpu_to_fs32(sb, get_seconds());
if ((flags & UFS_ST_MASK) == UFS_ST_SUN
|| (flags & UFS_ST_MASK) == UFS_ST_SUNOS
|| (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
ufs_set_fs_state(sb, usb1, usb3,
UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
ubh_mark_buffer_dirty (USPI_UBH(uspi));
sb->s_dirt = 0;
sb->s_flags |= MS_RDONLY;
} else {
/*
* fs was mounted as ro, remounting rw
*/
#ifndef CONFIG_UFS_FS_WRITE
printk("ufs was compiled with read-only support, "
"can't be mounted as read-write\n");
unlock_super(sb);
unlock_ufs(sb);
return -EINVAL;
#else
if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
printk("this ufstype is read-only supported\n");
unlock_super(sb);
unlock_ufs(sb);
return -EINVAL;
}
if (!ufs_read_cylinder_structures(sb)) {
printk("failed during remounting\n");
unlock_super(sb);
unlock_ufs(sb);
return -EPERM;
}
sb->s_flags &= ~MS_RDONLY;
#endif
}
UFS_SB(sb)->s_mount_opt = new_mount_opt;
unlock_super(sb);
unlock_ufs(sb);
return 0;
}
static int ufs_trunc_indirect(struct inode *inode, u64 offset, void *p)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_buffer_head * ind_ubh;
void *ind;
u64 tmp, indirect_block, i, frag_to_free;
unsigned free_count;
int retry;
UFSD("ENTER: ino %lu, offset %llu, p: %p\n",
inode->i_ino, (unsigned long long)offset, p);
BUG_ON(!p);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
frag_to_free = 0;
free_count = 0;
retry = 0;
tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp)
return 0;
ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize);
if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
ubh_brelse (ind_ubh);
return 1;
}
if (!ind_ubh) {
ufs_data_ptr_clear(uspi, p);
return 0;
}
indirect_block = (DIRECT_BLOCK > offset) ? (DIRECT_BLOCK - offset) : 0;
for (i = indirect_block; i < uspi->s_apb; i++) {
ind = ubh_get_data_ptr(uspi, ind_ubh, i);
tmp = ufs_data_ptr_to_cpu(sb, ind);
if (!tmp)
continue;
ufs_data_ptr_clear(uspi, ind);
ubh_mark_buffer_dirty(ind_ubh);
if (free_count == 0) {
frag_to_free = tmp;
free_count = uspi->s_fpb;
} else if (free_count > 0 && frag_to_free == tmp - free_count)
free_count += uspi->s_fpb;
else {
ufs_free_blocks (inode, frag_to_free, free_count);
frag_to_free = tmp;
free_count = uspi->s_fpb;
}
mark_inode_dirty(inode);
}
if (free_count > 0) {
ufs_free_blocks (inode, frag_to_free, free_count);
}
for (i = 0; i < uspi->s_apb; i++)
if (!ufs_is_data_ptr_zero(uspi,
ubh_get_data_ptr(uspi, ind_ubh, i)))
break;
if (i >= uspi->s_apb) {
tmp = ufs_data_ptr_to_cpu(sb, p);
ufs_data_ptr_clear(uspi, p);
ufs_free_blocks (inode, tmp, uspi->s_fpb);
mark_inode_dirty(inode);
ubh_bforget(ind_ubh);
ind_ubh = NULL;
}
if (IS_SYNC(inode) && ind_ubh && ubh_buffer_dirty(ind_ubh))
ubh_sync_block(ind_ubh);
ubh_brelse (ind_ubh);
UFSD("EXIT: ino %lu\n", inode->i_ino);
return retry;
}
static int ufs_alloc_lastblock(struct inode *inode)
{
int err = 0;
struct super_block *sb = inode->i_sb;
struct address_space *mapping = inode->i_mapping;
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
unsigned i, end;
sector_t lastfrag;
struct page *lastpage;
struct buffer_head *bh;
u64 phys64;
lastfrag = (i_size_read(inode) + uspi->s_fsize - 1) >> uspi->s_fshift;
if (!lastfrag)
goto out;
lastfrag--;
lastpage = ufs_get_locked_page(mapping, lastfrag >>
(PAGE_CACHE_SHIFT - inode->i_blkbits));
if (IS_ERR(lastpage)) {
err = -EIO;
goto out;
}
end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1);
bh = page_buffers(lastpage);
for (i = 0; i < end; ++i)
bh = bh->b_this_page;
err = ufs_getfrag_block(inode, lastfrag, bh, 1);
if (unlikely(err))
goto out_unlock;
if (buffer_new(bh)) {
clear_buffer_new(bh);
unmap_underlying_metadata(bh->b_bdev,
bh->b_blocknr);
/*
* we do not zeroize fragment, because of
* if it maped to hole, it already contains zeroes
*/
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
set_page_dirty(lastpage);
}
if (lastfrag >= UFS_IND_FRAGMENT) {
end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
phys64 = bh->b_blocknr + 1;
for (i = 0; i < end; ++i) {
bh = sb_getblk(sb, i + phys64);
lock_buffer(bh);
memset(bh->b_data, 0, sb->s_blocksize);
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
unlock_buffer(bh);
sync_dirty_buffer(bh);
brelse(bh);
}
}
out_unlock:
ufs_put_locked_page(lastpage);
out:
return err;
}
static int ufs_trunc_direct(struct inode *inode)
{
struct ufs_inode_info *ufsi = UFS_I(inode);
struct super_block * sb;
struct ufs_sb_private_info * uspi;
void *p;
u64 frag1, frag2, frag3, frag4, block1, block2;
unsigned frag_to_free, free_count;
unsigned i, tmp;
int retry;
UFSD("ENTER: ino %lu\n", inode->i_ino);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
frag_to_free = 0;
free_count = 0;
retry = 0;
frag1 = DIRECT_FRAGMENT;
frag4 = min_t(u32, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
frag3 = frag4 & ~uspi->s_fpbmask;
block1 = block2 = 0;
if (frag2 > frag3) {
frag2 = frag4;
frag3 = frag4 = 0;
} else if (frag2 < frag3) {
block1 = ufs_fragstoblks (frag2);
block2 = ufs_fragstoblks (frag3);
}
UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
" frag3 %llu, frag4 %llu\n", inode->i_ino,
(unsigned long long)frag1, (unsigned long long)frag2,
(unsigned long long)block1, (unsigned long long)block2,
(unsigned long long)frag3, (unsigned long long)frag4);
if (frag1 >= frag2)
goto next1;
/*
* Free first free fragments
*/
p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp )
ufs_panic (sb, "ufs_trunc_direct", "internal error");
frag2 -= frag1;
frag1 = ufs_fragnum (frag1);
ufs_free_fragments(inode, tmp + frag1, frag2);
mark_inode_dirty(inode);
frag_to_free = tmp + frag1;
next1:
/*
* Free whole blocks
*/
for (i = block1 ; i < block2; i++) {
p = ufs_get_direct_data_ptr(uspi, ufsi, i);
tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp)
continue;
ufs_data_ptr_clear(uspi, p);
if (free_count == 0) {
frag_to_free = tmp;
free_count = uspi->s_fpb;
} else if (free_count > 0 && frag_to_free == tmp - free_count)
free_count += uspi->s_fpb;
else {
ufs_free_blocks (inode, frag_to_free, free_count);
frag_to_free = tmp;
free_count = uspi->s_fpb;
}
mark_inode_dirty(inode);
}
if (free_count > 0)
ufs_free_blocks (inode, frag_to_free, free_count);
if (frag3 >= frag4)
goto next3;
/*
* Free last free fragments
*/
p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp )
ufs_panic(sb, "ufs_truncate_direct", "internal error");
frag4 = ufs_fragnum (frag4);
ufs_data_ptr_clear(uspi, p);
ufs_free_fragments (inode, tmp, frag4);
mark_inode_dirty(inode);
next3:
UFSD("EXIT: ino %lu\n", inode->i_ino);
return retry;
}
/*
* Free 'count' fragments from fragment number 'fragment'
*/
void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
unsigned cgno, bit, end_bit, bbase, blkmap, i;
u64 blkno;
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
UFSD("ENTER, fragment %llu, count %u\n",
(unsigned long long)fragment, count);
if (ufs_fragnum(fragment) + count > uspi->s_fpg)
ufs_error (sb, "ufs_free_fragments", "internal error");
mutex_lock(&UFS_SB(sb)->s_lock);
cgno = ufs_dtog(uspi, fragment);
bit = ufs_dtogd(uspi, fragment);
if (cgno >= uspi->s_ncg) {
ufs_panic (sb, "ufs_free_fragments", "freeing blocks are outside device");
goto failed;
}
ucpi = ufs_load_cylinder (sb, cgno);
if (!ucpi)
goto failed;
ucg = ubh_get_ucg (UCPI_UBH(ucpi));
if (!ufs_cg_chkmagic(sb, ucg)) {
ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno);
goto failed;
}
end_bit = bit + count;
bbase = ufs_blknum (bit);
blkmap = ubh_blkmap (UCPI_UBH(ucpi), ucpi->c_freeoff, bbase);
ufs_fragacct (sb, blkmap, ucg->cg_frsum, -1);
for (i = bit; i < end_bit; i++) {
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, i))
ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, i);
else
ufs_error (sb, "ufs_free_fragments",
"bit already cleared for fragment %u", i);
}
fs32_add(sb, &ucg->cg_cs.cs_nffree, count);
uspi->cs_total.cs_nffree += count;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
blkmap = ubh_blkmap (UCPI_UBH(ucpi), ucpi->c_freeoff, bbase);
ufs_fragacct(sb, blkmap, ucg->cg_frsum, 1);
/*
* Trying to reassemble free fragments into block
*/
blkno = ufs_fragstoblks (bbase);
if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno)) {
fs32_sub(sb, &ucg->cg_cs.cs_nffree, uspi->s_fpb);
uspi->cs_total.cs_nffree -= uspi->s_fpb;
fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, uspi->s_fpb);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, 1);
fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
uspi->cs_total.cs_nbfree++;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
if (uspi->fs_magic != UFS2_MAGIC) {
unsigned cylno = ufs_cbtocylno (bbase);
fs16_add(sb, &ubh_cg_blks(ucpi, cylno,
ufs_cbtorpos(bbase)), 1);
fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
}
}
ubh_mark_buffer_dirty (USPI_UBH(uspi));
ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
if (sb->s_flags & MS_SYNCHRONOUS)
ubh_sync_block(UCPI_UBH(ucpi));
ufs_mark_sb_dirty(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT\n");
return;
failed:
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT (FAILED)\n");
return;
}
/*
* Find cylinder group in cache and return it as pointer.
* If cylinder group is not in cache, we will load it from disk.
*
* The cache is managed by LRU algorithm.
*/
struct ufs_cg_private_info * ufs_load_cylinder (
struct super_block * sb, unsigned cgno)
{
struct ufs_sb_info * sbi = UFS_SB(sb);
struct ufs_sb_private_info * uspi;
struct ufs_cg_private_info * ucpi;
unsigned cg, i, j;
UFSD("ENTER, cgno %u\n", cgno);
uspi = sbi->s_uspi;
if (cgno >= uspi->s_ncg) {
ufs_panic (sb, "ufs_load_cylinder", "internal error, high number of cg");
return NULL;
}
/*
* Cylinder group number cg it in cache and it was last used
*/
if (sbi->s_cgno[0] == cgno) {
UFSD("EXIT\n");
return sbi->s_ucpi[0];
}
/*
* Number of cylinder groups is not higher than UFS_MAX_GROUP_LOADED
*/
if (uspi->s_ncg <= UFS_MAX_GROUP_LOADED) {
if (sbi->s_cgno[cgno] != UFS_CGNO_EMPTY) {
if (sbi->s_cgno[cgno] != cgno) {
ufs_panic (sb, "ufs_load_cylinder", "internal error, wrong number of cg in cache");
UFSD("EXIT (FAILED)\n");
return NULL;
}
else {
UFSD("EXIT\n");
return sbi->s_ucpi[cgno];
}
} else {
ufs_read_cylinder (sb, cgno, cgno);
UFSD("EXIT\n");
return sbi->s_ucpi[cgno];
}
}
/*
* Cylinder group number cg is in cache but it was not last used,
* we will move to the first position
*/
for (i = 0; i < sbi->s_cg_loaded && sbi->s_cgno[i] != cgno; i++);
if (i < sbi->s_cg_loaded && sbi->s_cgno[i] == cgno) {
cg = sbi->s_cgno[i];
ucpi = sbi->s_ucpi[i];
for (j = i; j > 0; j--) {
sbi->s_cgno[j] = sbi->s_cgno[j-1];
sbi->s_ucpi[j] = sbi->s_ucpi[j-1];
}
sbi->s_cgno[0] = cg;
sbi->s_ucpi[0] = ucpi;
/*
* Cylinder group number cg is not in cache, we will read it from disk
* and put it to the first position
*/
} else {
if (sbi->s_cg_loaded < UFS_MAX_GROUP_LOADED)
sbi->s_cg_loaded++;
else
ufs_put_cylinder (sb, UFS_MAX_GROUP_LOADED-1);
ucpi = sbi->s_ucpi[sbi->s_cg_loaded - 1];
for (j = sbi->s_cg_loaded - 1; j > 0; j--) {
sbi->s_cgno[j] = sbi->s_cgno[j-1];
sbi->s_ucpi[j] = sbi->s_ucpi[j-1];
}
sbi->s_ucpi[0] = ucpi;
ufs_read_cylinder (sb, cgno, 0);
}
UFSD("EXIT\n");
return sbi->s_ucpi[0];
}
/*
* Free 'count' fragments from fragment number 'fragment' (free whole blocks)
*/
void ufs_free_blocks(struct inode *inode, u64 fragment, unsigned count)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
unsigned overflow, cgno, bit, end_bit, i;
u64 blkno;
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
UFSD("ENTER, fragment %llu, count %u\n",
(unsigned long long)fragment, count);
if ((fragment & uspi->s_fpbmask) || (count & uspi->s_fpbmask)) {
ufs_error (sb, "ufs_free_blocks", "internal error, "
"fragment %llu, count %u\n",
(unsigned long long)fragment, count);
goto failed;
}
mutex_lock(&UFS_SB(sb)->s_lock);
do_more:
overflow = 0;
cgno = ufs_dtog(uspi, fragment);
bit = ufs_dtogd(uspi, fragment);
if (cgno >= uspi->s_ncg) {
ufs_panic (sb, "ufs_free_blocks", "freeing blocks are outside device");
goto failed_unlock;
}
end_bit = bit + count;
if (end_bit > uspi->s_fpg) {
overflow = bit + count - uspi->s_fpg;
count -= overflow;
end_bit -= overflow;
}
ucpi = ufs_load_cylinder (sb, cgno);
if (!ucpi)
goto failed_unlock;
ucg = ubh_get_ucg (UCPI_UBH(ucpi));
if (!ufs_cg_chkmagic(sb, ucg)) {
ufs_panic (sb, "ufs_free_blocks", "internal error, bad magic number on cg %u", cgno);
goto failed_unlock;
}
for (i = bit; i < end_bit; i += uspi->s_fpb) {
blkno = ufs_fragstoblks(i);
if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno)) {
ufs_error(sb, "ufs_free_blocks", "freeing free fragment");
}
ubh_setblock(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, 1);
fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
uspi->cs_total.cs_nbfree++;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
if (uspi->fs_magic != UFS2_MAGIC) {
unsigned cylno = ufs_cbtocylno(i);
fs16_add(sb, &ubh_cg_blks(ucpi, cylno,
ufs_cbtorpos(i)), 1);
fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
}
}
ubh_mark_buffer_dirty (USPI_UBH(uspi));
ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
if (sb->s_flags & MS_SYNCHRONOUS)
ubh_sync_block(UCPI_UBH(ucpi));
if (overflow) {
fragment += count;
count = overflow;
goto do_more;
}
ufs_mark_sb_dirty(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT\n");
return;
failed_unlock:
mutex_unlock(&UFS_SB(sb)->s_lock);
failed:
UFSD("EXIT (FAILED)\n");
return;
}
static u64 ufs_alloccg_block(struct inode *inode,
struct ufs_cg_private_info *ucpi,
u64 goal, int *err)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_cylinder_group * ucg;
u64 result, blkno;
UFSD("ENTER, goal %llu\n", (unsigned long long)goal);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
ucg = ubh_get_ucg(UCPI_UBH(ucpi));
if (goal == 0) {
goal = ucpi->c_rotor;
goto norot;
}
goal = ufs_blknum (goal);
goal = ufs_dtogd(uspi, goal);
/*
* If the requested block is available, use it.
*/
if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, ufs_fragstoblks(goal))) {
result = goal;
goto gotit;
}
norot:
result = ufs_bitmap_search (sb, ucpi, goal, uspi->s_fpb);
if (result == INVBLOCK)
return INVBLOCK;
ucpi->c_rotor = result;
gotit:
blkno = ufs_fragstoblks(result);
ubh_clrblock (UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, -1);
if(DQUOT_ALLOC_BLOCK(inode, uspi->s_fpb)) {
*err = -EDQUOT;
return INVBLOCK;
}
fs32_sub(sb, &ucg->cg_cs.cs_nbfree, 1);
uspi->cs_total.cs_nbfree--;
fs32_sub(sb, &UFS_SB(sb)->fs_cs(ucpi->c_cgx).cs_nbfree, 1);
if (uspi->fs_magic != UFS2_MAGIC) {
unsigned cylno = ufs_cbtocylno((unsigned)result);
fs16_sub(sb, &ubh_cg_blks(ucpi, cylno,
ufs_cbtorpos((unsigned)result)), 1);
fs32_sub(sb, &ubh_cg_blktot(ucpi, cylno), 1);
}
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
static int ufs_trunc_dindirect (struct inode *inode, unsigned offset, __fs32 *p)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_buffer_head * dind_bh;
unsigned i, tmp, dindirect_block;
__fs32 * dind;
int retry = 0;
UFSD("ENTER\n");
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
dindirect_block = (DIRECT_BLOCK > offset)
? ((DIRECT_BLOCK - offset) >> uspi->s_apbshift) : 0;
retry = 0;
tmp = fs32_to_cpu(sb, *p);
if (!tmp)
return 0;
dind_bh = ubh_bread(sb, tmp, uspi->s_bsize);
if (tmp != fs32_to_cpu(sb, *p)) {
ubh_brelse (dind_bh);
return 1;
}
if (!dind_bh) {
*p = 0;
return 0;
}
for (i = dindirect_block ; i < uspi->s_apb ; i++) {
dind = ubh_get_addr32 (dind_bh, i);
tmp = fs32_to_cpu(sb, *dind);
if (!tmp)
continue;
retry |= ufs_trunc_indirect (inode, offset + (i << uspi->s_apbshift), dind);
ubh_mark_buffer_dirty(dind_bh);
}
for (i = 0; i < uspi->s_apb; i++)
if (*ubh_get_addr32 (dind_bh, i))
break;
if (i >= uspi->s_apb) {
tmp = fs32_to_cpu(sb, *p);
*p = 0;
ufs_free_blocks(inode, tmp, uspi->s_fpb);
mark_inode_dirty(inode);
ubh_bforget(dind_bh);
dind_bh = NULL;
}
if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh)) {
ubh_ll_rw_block(SWRITE, dind_bh);
ubh_wait_on_buffer (dind_bh);
}
ubh_brelse (dind_bh);
UFSD("EXIT\n");
return retry;
}
/*
* Free 'count' fragments from fragment number 'fragment' (free whole blocks)
*/
void ufs_free_blocks (struct inode * inode, unsigned fragment, unsigned count) {
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
unsigned overflow, cgno, bit, end_bit, blkno, i, cylno;
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(USPI_UBH);
UFSD(("ENTER, fragment %u, count %u\n", fragment, count))
if ((fragment & uspi->s_fpbmask) || (count & uspi->s_fpbmask)) {
ufs_error (sb, "ufs_free_blocks", "internal error, "
"fragment %u, count %u\n", fragment, count);
goto failed;
}
lock_super(sb);
do_more:
overflow = 0;
cgno = ufs_dtog (fragment);
bit = ufs_dtogd (fragment);
if (cgno >= uspi->s_ncg) {
ufs_panic (sb, "ufs_free_blocks", "freeing blocks are outside device");
goto failed;
}
end_bit = bit + count;
if (end_bit > uspi->s_fpg) {
overflow = bit + count - uspi->s_fpg;
count -= overflow;
end_bit -= overflow;
}
ucpi = ufs_load_cylinder (sb, cgno);
if (!ucpi)
goto failed;
ucg = ubh_get_ucg (UCPI_UBH);
if (!ufs_cg_chkmagic(sb, ucg)) {
ufs_panic (sb, "ufs_free_blocks", "internal error, bad magic number on cg %u", cgno);
goto failed;
}
for (i = bit; i < end_bit; i += uspi->s_fpb) {
blkno = ufs_fragstoblks(i);
if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, blkno)) {
ufs_error(sb, "ufs_free_blocks", "freeing free fragment");
}
ubh_setblock(UCPI_UBH, ucpi->c_freeoff, blkno);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, 1);
DQUOT_FREE_BLOCK(inode, uspi->s_fpb);
fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
fs32_add(sb, &usb1->fs_cstotal.cs_nbfree, 1);
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
cylno = ufs_cbtocylno(i);
fs16_add(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(i)), 1);
fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
}
ubh_mark_buffer_dirty (USPI_UBH);
ubh_mark_buffer_dirty (UCPI_UBH);
if (sb->s_flags & MS_SYNCHRONOUS) {
ubh_wait_on_buffer (UCPI_UBH);
ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi);
ubh_wait_on_buffer (UCPI_UBH);
}
if (overflow) {
fragment += count;
count = overflow;
goto do_more;
}
sb->s_dirt = 1;
unlock_super (sb);
UFSD(("EXIT\n"))
return;
failed:
unlock_super (sb);
UFSD(("EXIT (FAILED)\n"))
return;
}
/*
* This is blatantly stolen from ext2fs
*/
static int
ufs_readdir (struct file * filp, void * dirent, filldir_t filldir)
{
struct inode *inode = filp->f_dentry->d_inode;
int error = 0;
unsigned long offset, lblk;
int i, stored;
struct buffer_head * bh;
struct ufs_dir_entry * de;
struct super_block * sb;
int de_reclen;
unsigned flags;
u64 blk= 0L;
lock_kernel();
sb = inode->i_sb;
flags = UFS_SB(sb)->s_flags;
UFSD(("ENTER, ino %lu f_pos %lu\n", inode->i_ino, (unsigned long) filp->f_pos))
stored = 0;
bh = NULL;
offset = filp->f_pos & (sb->s_blocksize - 1);
while (!error && !stored && filp->f_pos < inode->i_size) {
lblk = (filp->f_pos) >> sb->s_blocksize_bits;
blk = ufs_frag_map(inode, lblk);
if (!blk || !(bh = sb_bread(sb, blk))) {
/* XXX - error - skip to the next block */
printk("ufs_readdir: "
"dir inode %lu has a hole at offset %lu\n",
inode->i_ino, (unsigned long int)filp->f_pos);
filp->f_pos += sb->s_blocksize - offset;
continue;
}
revalidate:
/* If the dir block has changed since the last call to
* readdir(2), then we might be pointing to an invalid
* dirent right now. Scan from the start of the block
* to make sure. */
if (filp->f_version != inode->i_version) {
for (i = 0; i < sb->s_blocksize && i < offset; ) {
de = (struct ufs_dir_entry *)(bh->b_data + i);
/* It's too expensive to do a full
* dirent test each time round this
* loop, but we do have to test at
* least that it is non-zero. A
* failure will be detected in the
* dirent test below. */
de_reclen = fs16_to_cpu(sb, de->d_reclen);
if (de_reclen < 1)
break;
i += de_reclen;
}
offset = i;
filp->f_pos = (filp->f_pos & ~(sb->s_blocksize - 1))
| offset;
filp->f_version = inode->i_version;
}
while (!error && filp->f_pos < inode->i_size
&& offset < sb->s_blocksize) {
de = (struct ufs_dir_entry *) (bh->b_data + offset);
/* XXX - put in a real ufs_check_dir_entry() */
if ((de->d_reclen == 0) || (ufs_get_de_namlen(sb, de) == 0)) {
filp->f_pos = (filp->f_pos &
(sb->s_blocksize - 1)) +
sb->s_blocksize;
brelse(bh);
unlock_kernel();
return stored;
}
if (!ufs_check_dir_entry ("ufs_readdir", inode, de,
bh, offset)) {
/* On error, skip the f_pos to the
next block. */
filp->f_pos = (filp->f_pos |
(sb->s_blocksize - 1)) +
1;
brelse (bh);
unlock_kernel();
return stored;
}
offset += fs16_to_cpu(sb, de->d_reclen);
if (de->d_ino) {
/* We might block in the next section
* if the data destination is
* currently swapped out. So, use a
* version stamp to detect whether or
* not the directory has been modified
* during the copy operation. */
unsigned long version = filp->f_version;
unsigned char d_type = DT_UNKNOWN;
UFSD(("filldir(%s,%u)\n", de->d_name,
fs32_to_cpu(sb, de->d_ino)))
UFSD(("namlen %u\n", ufs_get_de_namlen(sb, de)))
if ((flags & UFS_DE_MASK) == UFS_DE_44BSD)
d_type = de->d_u.d_44.d_type;
error = filldir(dirent, de->d_name,
ufs_get_de_namlen(sb, de), filp->f_pos,
fs32_to_cpu(sb, de->d_ino), d_type);
if (error)
break;
if (version != filp->f_version)
goto revalidate;
stored ++;
}
filp->f_pos += fs16_to_cpu(sb, de->d_reclen);
}
offset = 0;
brelse (bh);
}
/*
* Free 'count' fragments from fragment number 'fragment'
*/
void ufs_free_fragments (struct inode * inode, unsigned fragment, unsigned count) {
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
unsigned cgno, bit, end_bit, bbase, blkmap, i, blkno, cylno;
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(USPI_UBH);
UFSD(("ENTER, fragment %u, count %u\n", fragment, count))
if (ufs_fragnum(fragment) + count > uspi->s_fpg)
ufs_error (sb, "ufs_free_fragments", "internal error");
lock_super(sb);
cgno = ufs_dtog(fragment);
bit = ufs_dtogd(fragment);
if (cgno >= uspi->s_ncg) {
ufs_panic (sb, "ufs_free_fragments", "freeing blocks are outside device");
goto failed;
}
ucpi = ufs_load_cylinder (sb, cgno);
if (!ucpi)
goto failed;
ucg = ubh_get_ucg (UCPI_UBH);
if (!ufs_cg_chkmagic(sb, ucg)) {
ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno);
goto failed;
}
end_bit = bit + count;
bbase = ufs_blknum (bit);
blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase);
ufs_fragacct (sb, blkmap, ucg->cg_frsum, -1);
for (i = bit; i < end_bit; i++) {
if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, i))
ubh_setbit (UCPI_UBH, ucpi->c_freeoff, i);
else ufs_error (sb, "ufs_free_fragments",
"bit already cleared for fragment %u", i);
}
DQUOT_FREE_BLOCK (inode, count);
fs32_add(sb, &ucg->cg_cs.cs_nffree, count);
fs32_add(sb, &usb1->fs_cstotal.cs_nffree, count);
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase);
ufs_fragacct(sb, blkmap, ucg->cg_frsum, 1);
/*
* Trying to reassemble free fragments into block
*/
blkno = ufs_fragstoblks (bbase);
if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, blkno)) {
fs32_sub(sb, &ucg->cg_cs.cs_nffree, uspi->s_fpb);
fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, uspi->s_fpb);
fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, uspi->s_fpb);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, 1);
fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
fs32_add(sb, &usb1->fs_cstotal.cs_nbfree, 1);
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
cylno = ufs_cbtocylno (bbase);
fs16_add(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(bbase)), 1);
fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
}
ubh_mark_buffer_dirty (USPI_UBH);
ubh_mark_buffer_dirty (UCPI_UBH);
if (sb->s_flags & MS_SYNCHRONOUS) {
ubh_wait_on_buffer (UCPI_UBH);
ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi);
ubh_wait_on_buffer (UCPI_UBH);
}
sb->s_dirt = 1;
unlock_super (sb);
UFSD(("EXIT\n"))
return;
failed:
unlock_super (sb);
UFSD(("EXIT (FAILED)\n"))
return;
}
/*
* There are two policies for allocating an inode. If the new inode is
* a directory, then a forward search is made for a block group with both
* free space and a low directory-to-inode ratio; if that fails, then of
* the groups with above-average free space, that group with the fewest
* directories already is chosen.
*
* For other inodes, search forward from the parent directory's block
* group to find a free inode.
*/
struct inode * ufs_new_inode(struct inode * dir, int mode)
{
struct super_block * sb;
struct ufs_sb_info * sbi;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
struct inode * inode;
unsigned cg, bit, i, j, start;
struct ufs_inode_info *ufsi;
UFSD(("ENTER\n"))
/* Cannot create files in a deleted directory */
if (!dir || !dir->i_nlink)
return ERR_PTR(-EPERM);
sb = dir->i_sb;
inode = new_inode(sb);
if (!inode)
return ERR_PTR(-ENOMEM);
ufsi = UFS_I(inode);
sbi = UFS_SB(sb);
uspi = sbi->s_uspi;
usb1 = ubh_get_usb_first(USPI_UBH);
lock_super (sb);
/*
* Try to place the inode in its parent directory
*/
i = ufs_inotocg(dir->i_ino);
if (sbi->fs_cs(i).cs_nifree) {
cg = i;
goto cg_found;
}
/*
* Use a quadratic hash to find a group with a free inode
*/
for ( j = 1; j < uspi->s_ncg; j <<= 1 ) {
i += j;
if (i >= uspi->s_ncg)
i -= uspi->s_ncg;
if (sbi->fs_cs(i).cs_nifree) {
cg = i;
goto cg_found;
}
}
/*
* That failed: try linear search for a free inode
*/
i = ufs_inotocg(dir->i_ino) + 1;
for (j = 2; j < uspi->s_ncg; j++) {
i++;
if (i >= uspi->s_ncg)
i = 0;
if (sbi->fs_cs(i).cs_nifree) {
cg = i;
goto cg_found;
}
}
goto failed;
cg_found:
ucpi = ufs_load_cylinder (sb, cg);
if (!ucpi)
goto failed;
ucg = ubh_get_ucg(UCPI_UBH);
if (!ufs_cg_chkmagic(sb, ucg))
ufs_panic (sb, "ufs_new_inode", "internal error, bad cg magic number");
start = ucpi->c_irotor;
bit = ubh_find_next_zero_bit (UCPI_UBH, ucpi->c_iusedoff, uspi->s_ipg, start);
if (!(bit < uspi->s_ipg)) {
bit = ubh_find_first_zero_bit (UCPI_UBH, ucpi->c_iusedoff, start);
if (!(bit < start)) {
ufs_error (sb, "ufs_new_inode",
"cylinder group %u corrupted - error in inode bitmap\n", cg);
goto failed;
}
}
UFSD(("start = %u, bit = %u, ipg = %u\n", start, bit, uspi->s_ipg))
if (ubh_isclr (UCPI_UBH, ucpi->c_iusedoff, bit))
ubh_setbit (UCPI_UBH, ucpi->c_iusedoff, bit);
else {
ufs_panic (sb, "ufs_new_inode", "internal error");
goto failed;
}
fs32_sub(sb, &ucg->cg_cs.cs_nifree, 1);
fs32_sub(sb, &usb1->fs_cstotal.cs_nifree, 1);
fs32_sub(sb, &sbi->fs_cs(cg).cs_nifree, 1);
if (S_ISDIR(mode)) {
fs32_add(sb, &ucg->cg_cs.cs_ndir, 1);
fs32_add(sb, &usb1->fs_cstotal.cs_ndir, 1);
fs32_add(sb, &sbi->fs_cs(cg).cs_ndir, 1);
}
ubh_mark_buffer_dirty (USPI_UBH);
ubh_mark_buffer_dirty (UCPI_UBH);
if (sb->s_flags & MS_SYNCHRONOUS) {
ubh_wait_on_buffer (UCPI_UBH);
ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **) &ucpi);
ubh_wait_on_buffer (UCPI_UBH);
}
sb->s_dirt = 1;
inode->i_mode = mode;
inode->i_uid = current->fsuid;
if (dir->i_mode & S_ISGID) {
inode->i_gid = dir->i_gid;
if (S_ISDIR(mode))
inode->i_mode |= S_ISGID;
} else
inode->i_gid = current->fsgid;
inode->i_ino = cg * uspi->s_ipg + bit;
inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat), not the fs block size */
inode->i_blocks = 0;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
ufsi->i_flags = UFS_I(dir)->i_flags;
ufsi->i_lastfrag = 0;
ufsi->i_gen = 0;
ufsi->i_shadow = 0;
ufsi->i_osync = 0;
ufsi->i_oeftflag = 0;
memset(&ufsi->i_u1, 0, sizeof(ufsi->i_u1));
insert_inode_hash(inode);
mark_inode_dirty(inode);
unlock_super (sb);
if (DQUOT_ALLOC_INODE(inode)) {
DQUOT_DROP(inode);
inode->i_flags |= S_NOQUOTA;
inode->i_nlink = 0;
iput(inode);
return ERR_PTR(-EDQUOT);
}
UFSD(("allocating inode %lu\n", inode->i_ino))
UFSD(("EXIT\n"))
return inode;
failed:
unlock_super (sb);
make_bad_inode(inode);
iput (inode);
UFSD(("EXIT (FAILED)\n"))
return ERR_PTR(-ENOSPC);
}
/*
* Read on-disk structures associated with cylinder groups
*/
static int ufs_read_cylinder_structures(struct super_block *sb)
{
struct ufs_sb_info *sbi = UFS_SB(sb);
struct ufs_sb_private_info *uspi = sbi->s_uspi;
struct ufs_buffer_head * ubh;
unsigned char * base, * space;
unsigned size, blks, i;
struct ufs_super_block_third *usb3;
UFSD("ENTER\n");
usb3 = ubh_get_usb_third(uspi);
/*
* Read cs structures from (usually) first data block
* on the device.
*/
size = uspi->s_cssize;
blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
base = space = kmalloc(size, GFP_NOFS);
if (!base)
goto failed;
sbi->s_csp = (struct ufs_csum *)space;
for (i = 0; i < blks; i += uspi->s_fpb) {
size = uspi->s_bsize;
if (i + uspi->s_fpb > blks)
size = (blks - i) * uspi->s_fsize;
ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
if (!ubh)
goto failed;
ubh_ubhcpymem (space, ubh, size);
space += size;
ubh_brelse (ubh);
ubh = NULL;
}
/*
* Read cylinder group (we read only first fragment from block
* at this time) and prepare internal data structures for cg caching.
*/
if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
goto failed;
for (i = 0; i < uspi->s_ncg; i++)
sbi->s_ucg[i] = NULL;
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
sbi->s_ucpi[i] = NULL;
sbi->s_cgno[i] = UFS_CGNO_EMPTY;
}
for (i = 0; i < uspi->s_ncg; i++) {
UFSD("read cg %u\n", i);
if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
goto failed;
if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
goto failed;
ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
}
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
goto failed;
sbi->s_cgno[i] = UFS_CGNO_EMPTY;
}
sbi->s_cg_loaded = 0;
UFSD("EXIT\n");
return 1;
failed:
kfree (base);
if (sbi->s_ucg) {
for (i = 0; i < uspi->s_ncg; i++)
if (sbi->s_ucg[i])
brelse (sbi->s_ucg[i]);
kfree (sbi->s_ucg);
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
kfree (sbi->s_ucpi[i]);
}
UFSD("EXIT (FAILED)\n");
return 0;
}
u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
u64 goal, unsigned count, int *err,
struct page *locked_page)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
unsigned cgno, oldcount, newcount;
u64 tmp, request, result;
UFSD("ENTER, ino %lu, fragment %llu, goal %llu, count %u\n",
inode->i_ino, (unsigned long long)fragment,
(unsigned long long)goal, count);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
*err = -ENOSPC;
lock_super (sb);
tmp = ufs_data_ptr_to_cpu(sb, p);
if (count + ufs_fragnum(fragment) > uspi->s_fpb) {
ufs_warning(sb, "ufs_new_fragments", "internal warning"
" fragment %llu, count %u",
(unsigned long long)fragment, count);
count = uspi->s_fpb - ufs_fragnum(fragment);
}
oldcount = ufs_fragnum (fragment);
newcount = oldcount + count;
/*
* Somebody else has just allocated our fragments
*/
if (oldcount) {
if (!tmp) {
ufs_error(sb, "ufs_new_fragments", "internal error, "
"fragment %llu, tmp %llu\n",
(unsigned long long)fragment,
(unsigned long long)tmp);
unlock_super(sb);
return INVBLOCK;
}
if (fragment < UFS_I(inode)->i_lastfrag) {
UFSD("EXIT (ALREADY ALLOCATED)\n");
unlock_super (sb);
return 0;
}
}
else {
if (tmp) {
UFSD("EXIT (ALREADY ALLOCATED)\n");
unlock_super(sb);
return 0;
}
}
/*
* There is not enough space for user on the device
*/
if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(uspi, UFS_MINFREE) <= 0) {
unlock_super (sb);
UFSD("EXIT (FAILED)\n");
return 0;
}
if (goal >= uspi->s_size)
goal = 0;
if (goal == 0)
cgno = ufs_inotocg (inode->i_ino);
else
cgno = ufs_dtog(uspi, goal);
/*
* allocate new fragment
*/
if (oldcount == 0) {
result = ufs_alloc_fragments (inode, cgno, goal, count, err);
if (result) {
ufs_cpu_to_data_ptr(sb, p, result);
*err = 0;
UFS_I(inode)->i_lastfrag =
max_t(u32, UFS_I(inode)->i_lastfrag,
fragment + count);
ufs_clear_frags(inode, result + oldcount,
newcount - oldcount, locked_page != NULL);
}
unlock_super(sb);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
/*
* resize block
*/
result = ufs_add_fragments (inode, tmp, oldcount, newcount, err);
if (result) {
*err = 0;
UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
locked_page != NULL);
unlock_super(sb);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
/*
* allocate new block and move data
*/
switch (fs32_to_cpu(sb, usb1->fs_optim)) {
case UFS_OPTSPACE:
request = newcount;
if (uspi->s_minfree < 5 || uspi->cs_total.cs_nffree
> uspi->s_dsize * uspi->s_minfree / (2 * 100))
break;
usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
break;
default:
usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
case UFS_OPTTIME:
request = uspi->s_fpb;
if (uspi->cs_total.cs_nffree < uspi->s_dsize *
(uspi->s_minfree - 2) / 100)
break;
usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
break;
}
result = ufs_alloc_fragments (inode, cgno, goal, request, err);
if (result) {
ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
locked_page != NULL);
ufs_change_blocknr(inode, fragment - oldcount, oldcount,
uspi->s_sbbase + tmp,
uspi->s_sbbase + result, locked_page);
ufs_cpu_to_data_ptr(sb, p, result);
*err = 0;
UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
unlock_super(sb);
if (newcount < request)
ufs_free_fragments (inode, result + newcount, request - newcount);
ufs_free_fragments (inode, tmp, oldcount);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
unlock_super(sb);
UFSD("EXIT (FAILED)\n");
return 0;
}
static int ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_buffer_head *dind_bh;
u64 i, tmp, dindirect_block;
void *dind;
int retry = 0;
UFSD("ENTER: ino %lu\n", inode->i_ino);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
dindirect_block = (DIRECT_BLOCK > offset)
? ((DIRECT_BLOCK - offset) >> uspi->s_apbshift) : 0;
retry = 0;
tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp)
return 0;
dind_bh = ubh_bread(sb, tmp, uspi->s_bsize);
if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
ubh_brelse (dind_bh);
return 1;
}
if (!dind_bh) {
ufs_data_ptr_clear(uspi, p);
return 0;
}
for (i = dindirect_block ; i < uspi->s_apb ; i++) {
dind = ubh_get_data_ptr(uspi, dind_bh, i);
tmp = ufs_data_ptr_to_cpu(sb, dind);
if (!tmp)
continue;
retry |= ufs_trunc_indirect (inode, offset + (i << uspi->s_apbshift), dind);
ubh_mark_buffer_dirty(dind_bh);
}
for (i = 0; i < uspi->s_apb; i++)
if (!ufs_is_data_ptr_zero(uspi,
ubh_get_data_ptr(uspi, dind_bh, i)))
break;
if (i >= uspi->s_apb) {
tmp = ufs_data_ptr_to_cpu(sb, p);
ufs_data_ptr_clear(uspi, p);
ufs_free_blocks(inode, tmp, uspi->s_fpb);
mark_inode_dirty(inode);
ubh_bforget(dind_bh);
dind_bh = NULL;
}
if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh))
ubh_sync_block(dind_bh);
ubh_brelse (dind_bh);
UFSD("EXIT: ino %lu\n", inode->i_ino);
return retry;
}
/*
* Read on-disk structures associated with cylinder groups
*/
static int ufs_read_cylinder_structures (struct super_block *sb) {
struct ufs_sb_info * sbi = UFS_SB(sb);
struct ufs_sb_private_info * uspi;
struct ufs_super_block *usb;
struct ufs_buffer_head * ubh;
unsigned char * base, * space;
unsigned size, blks, i;
unsigned flags = 0;
UFSD(("ENTER\n"))
uspi = sbi->s_uspi;
usb = (struct ufs_super_block *)
((struct ufs_buffer_head *)uspi)->bh[0]->b_data;
flags = UFS_SB(sb)->s_flags;
/*
* Read cs structures from (usually) first data block
* on the device.
*/
size = uspi->s_cssize;
blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
base = space = kmalloc(size, GFP_KERNEL);
if (!base)
goto failed;
for (i = 0; i < blks; i += uspi->s_fpb) {
size = uspi->s_bsize;
if (i + uspi->s_fpb > blks)
size = (blks - i) * uspi->s_fsize;
if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
ubh = ubh_bread(sb,
fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size);
if (!ubh)
goto failed;
ubh_ubhcpymem (space, ubh, size);
sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
}
else {
ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
if (!ubh)
goto failed;
ubh_ubhcpymem(space, ubh, size);
sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
}
space += size;
ubh_brelse (ubh);
ubh = NULL;
}
/*
* Read cylinder group (we read only first fragment from block
* at this time) and prepare internal data structures for cg caching.
*/
if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
goto failed;
for (i = 0; i < uspi->s_ncg; i++)
sbi->s_ucg[i] = NULL;
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
sbi->s_ucpi[i] = NULL;
sbi->s_cgno[i] = UFS_CGNO_EMPTY;
}
for (i = 0; i < uspi->s_ncg; i++) {
UFSD(("read cg %u\n", i))
if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
goto failed;
if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
goto failed;
#ifdef UFS_SUPER_DEBUG_MORE
ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
#endif
}
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
goto failed;
sbi->s_cgno[i] = UFS_CGNO_EMPTY;
}
sbi->s_cg_loaded = 0;
UFSD(("EXIT\n"))
return 1;
failed:
if (base) kfree (base);
if (sbi->s_ucg) {
for (i = 0; i < uspi->s_ncg; i++)
if (sbi->s_ucg[i]) brelse (sbi->s_ucg[i]);
kfree (sbi->s_ucg);
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
if (sbi->s_ucpi[i]) kfree (sbi->s_ucpi[i]);
}
UFSD(("EXIT (FAILED)\n"))
return 0;
}
