*/
/*
- * Modified to avoid infinite loop on 2006 by
- * Evgeniy Dushistov <dushistov@mail.ru>
+ * Adoptation to use page cache and UFS2 write support by
+ * Evgeniy Dushistov <dushistov@mail.ru>, 2006-2007
*/
#include <linux/errno.h>
#include <linux/fs.h>
-#include <linux/ufs_fs.h>
#include <linux/fcntl.h>
#include <linux/time.h>
#include <linux/stat.h>
#include <linux/buffer_head.h>
#include <linux/blkdev.h>
#include <linux/sched.h>
+#include <linux/quotaops.h>
+#include "ufs_fs.h"
+#include "ufs.h"
#include "swab.h"
#include "util.h"
-#undef UFS_TRUNCATE_DEBUG
-
-#ifdef UFS_TRUNCATE_DEBUG
-#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
-#else
-#define UFSD(x)
-#endif
-
/*
* Secure deletion currently doesn't work. It interacts very badly
* with buffers shared with memory mappings, and for that reason
#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
-static int ufs_trunc_direct (struct inode * inode)
+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;
- __fs32 * p;
- unsigned frag1, frag2, frag3, frag4, block1, block2;
+ void *p;
+ u64 frag1, frag2, frag3, frag4, block1, block2;
unsigned frag_to_free, free_count;
unsigned i, tmp;
int retry;
- UFSD(("ENTER\n"))
+ UFSD("ENTER: ino %lu\n", inode->i_ino);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
if (frag2 > frag3) {
frag2 = frag4;
frag3 = frag4 = 0;
- }
- else if (frag2 < frag3) {
+ } else if (frag2 < frag3) {
block1 = ufs_fragstoblks (frag2);
block2 = ufs_fragstoblks (frag3);
}
- UFSD(("frag1 %u, frag2 %u, block1 %u, block2 %u, frag3 %u, frag4 %u\n", frag1, frag2, block1, block2, frag3, frag4))
+ 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 = ufsi->i_u1.i_data + ufs_fragstoblks (frag1);
- tmp = fs32_to_cpu(sb, *p);
+ 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);
- frag2 = ufs_fragnum (frag2);
- inode->i_blocks -= (frag2-frag1) << uspi->s_nspfshift;
+ ufs_free_fragments(inode, tmp + frag1, frag2);
mark_inode_dirty(inode);
- ufs_free_fragments (inode, tmp + frag1, frag2 - frag1);
frag_to_free = tmp + frag1;
next1:
* Free whole blocks
*/
for (i = block1 ; i < block2; i++) {
- p = ufsi->i_u1.i_data + i;
- tmp = fs32_to_cpu(sb, *p);
+ 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);
- *p = 0;
- inode->i_blocks -= uspi->s_nspb;
- mark_inode_dirty(inode);
if (free_count == 0) {
frag_to_free = tmp;
free_count = uspi->s_fpb;
frag_to_free = tmp;
free_count = uspi->s_fpb;
}
+ mark_inode_dirty(inode);
}
if (free_count > 0)
/*
* Free last free fragments
*/
- p = ufsi->i_u1.i_data + ufs_fragstoblks (frag3);
- tmp = fs32_to_cpu(sb, *p);
+ 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);
- *p = 0;
- inode->i_blocks -= frag4 << uspi->s_nspfshift;
- mark_inode_dirty(inode);
ufs_free_fragments (inode, tmp, frag4);
+ mark_inode_dirty(inode);
next3:
- UFSD(("EXIT\n"))
+ UFSD("EXIT: ino %lu\n", inode->i_ino);
return retry;
}
-static int ufs_trunc_indirect (struct inode * inode, unsigned offset, __fs32 *p)
+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;
- __fs32 * ind;
- unsigned indirect_block, i, tmp;
- unsigned frag_to_free, free_count;
+ void *ind;
+ u64 tmp, indirect_block, i, frag_to_free;
+ unsigned free_count;
int retry;
- UFSD(("ENTER\n"))
+ 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;
free_count = 0;
retry = 0;
- tmp = fs32_to_cpu(sb, *p);
+ tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp)
return 0;
ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize);
- if (tmp != fs32_to_cpu(sb, *p)) {
+ if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
ubh_brelse (ind_ubh);
return 1;
}
if (!ind_ubh) {
- *p = 0;
+ 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_addr32 (ind_ubh, i);
- tmp = fs32_to_cpu(sb, *ind);
+ ind = ubh_get_data_ptr(uspi, ind_ubh, i);
+ tmp = ufs_data_ptr_to_cpu(sb, ind);
if (!tmp)
continue;
- *ind = 0;
+ ufs_data_ptr_clear(uspi, ind);
ubh_mark_buffer_dirty(ind_ubh);
if (free_count == 0) {
frag_to_free = tmp;
frag_to_free = tmp;
free_count = uspi->s_fpb;
}
- inode->i_blocks -= uspi->s_nspb;
+
mark_inode_dirty(inode);
}
ufs_free_blocks (inode, frag_to_free, free_count);
}
for (i = 0; i < uspi->s_apb; i++)
- if (*ubh_get_addr32(ind_ubh,i))
+ if (!ufs_is_data_ptr_zero(uspi,
+ ubh_get_data_ptr(uspi, ind_ubh, i)))
break;
if (i >= uspi->s_apb) {
- if (ubh_max_bcount(ind_ubh) != 1) {
- retry = 1;
- }
- else {
- tmp = fs32_to_cpu(sb, *p);
- *p = 0;
- inode->i_blocks -= uspi->s_nspb;
- mark_inode_dirty(inode);
- ufs_free_blocks (inode, tmp, uspi->s_fpb);
- ubh_bforget(ind_ubh);
- ind_ubh = NULL;
- }
+ 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_ll_rw_block (SWRITE, 1, &ind_ubh);
+ ubh_ll_rw_block(SWRITE, ind_ubh);
ubh_wait_on_buffer (ind_ubh);
}
ubh_brelse (ind_ubh);
- UFSD(("EXIT\n"))
+ UFSD("EXIT: ino %lu\n", inode->i_ino);
return retry;
}
-static int ufs_trunc_dindirect (struct inode *inode, unsigned offset, __fs32 *p)
+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;
- unsigned i, tmp, dindirect_block;
- __fs32 * dind;
+ struct ufs_buffer_head *dind_bh;
+ u64 i, tmp, dindirect_block;
+ void *dind;
int retry = 0;
- UFSD(("ENTER\n"))
+ UFSD("ENTER: ino %lu\n", inode->i_ino);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
? ((DIRECT_BLOCK - offset) >> uspi->s_apbshift) : 0;
retry = 0;
- tmp = fs32_to_cpu(sb, *p);
+ tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp)
return 0;
dind_bh = ubh_bread(sb, tmp, uspi->s_bsize);
- if (tmp != fs32_to_cpu(sb, *p)) {
+ if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
ubh_brelse (dind_bh);
return 1;
}
if (!dind_bh) {
- *p = 0;
+ ufs_data_ptr_clear(uspi, p);
return 0;
}
for (i = dindirect_block ; i < uspi->s_apb ; i++) {
- dind = ubh_get_addr32 (dind_bh, i);
- tmp = fs32_to_cpu(sb, *dind);
+ 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);
}
for (i = 0; i < uspi->s_apb; i++)
- if (*ubh_get_addr32 (dind_bh, i))
+ if (!ufs_is_data_ptr_zero(uspi,
+ ubh_get_data_ptr(uspi, dind_bh, i)))
break;
if (i >= uspi->s_apb) {
- if (ubh_max_bcount(dind_bh) != 1)
- retry = 1;
- else {
- tmp = fs32_to_cpu(sb, *p);
- *p = 0;
- inode->i_blocks -= uspi->s_nspb;
- mark_inode_dirty(inode);
- ufs_free_blocks (inode, tmp, uspi->s_fpb);
- ubh_bforget(dind_bh);
- dind_bh = NULL;
- }
+ 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_ll_rw_block (SWRITE, 1, &dind_bh);
+ ubh_ll_rw_block(SWRITE, dind_bh);
ubh_wait_on_buffer (dind_bh);
}
ubh_brelse (dind_bh);
- UFSD(("EXIT\n"))
+ UFSD("EXIT: ino %lu\n", inode->i_ino);
return retry;
}
-static int ufs_trunc_tindirect (struct inode * inode)
+static int ufs_trunc_tindirect(struct inode *inode)
{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
struct ufs_inode_info *ufsi = UFS_I(inode);
- struct super_block * sb;
- struct ufs_sb_private_info * uspi;
struct ufs_buffer_head * tind_bh;
- unsigned tindirect_block, tmp, i;
- __fs32 * tind, * p;
+ u64 tindirect_block, tmp, i;
+ void *tind, *p;
int retry;
- UFSD(("ENTER\n"))
+ UFSD("ENTER: ino %lu\n", inode->i_ino);
- sb = inode->i_sb;
- uspi = UFS_SB(sb)->s_uspi;
retry = 0;
tindirect_block = (DIRECT_BLOCK > (UFS_NDADDR + uspi->s_apb + uspi->s_2apb))
? ((DIRECT_BLOCK - UFS_NDADDR - uspi->s_apb - uspi->s_2apb) >> uspi->s_2apbshift) : 0;
- p = ufsi->i_u1.i_data + UFS_TIND_BLOCK;
- if (!(tmp = fs32_to_cpu(sb, *p)))
+
+ p = ufs_get_direct_data_ptr(uspi, ufsi, UFS_TIND_BLOCK);
+ if (!(tmp = ufs_data_ptr_to_cpu(sb, p)))
return 0;
tind_bh = ubh_bread (sb, tmp, uspi->s_bsize);
- if (tmp != fs32_to_cpu(sb, *p)) {
+ if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
ubh_brelse (tind_bh);
return 1;
}
if (!tind_bh) {
- *p = 0;
+ ufs_data_ptr_clear(uspi, p);
return 0;
}
for (i = tindirect_block ; i < uspi->s_apb ; i++) {
- tind = ubh_get_addr32 (tind_bh, i);
+ tind = ubh_get_data_ptr(uspi, tind_bh, i);
retry |= ufs_trunc_dindirect(inode, UFS_NDADDR +
uspi->s_apb + ((i + 1) << uspi->s_2apbshift), tind);
ubh_mark_buffer_dirty(tind_bh);
}
for (i = 0; i < uspi->s_apb; i++)
- if (*ubh_get_addr32 (tind_bh, i))
+ if (!ufs_is_data_ptr_zero(uspi,
+ ubh_get_data_ptr(uspi, tind_bh, i)))
break;
if (i >= uspi->s_apb) {
- if (ubh_max_bcount(tind_bh) != 1)
- retry = 1;
- else {
- tmp = fs32_to_cpu(sb, *p);
- *p = 0;
- inode->i_blocks -= uspi->s_nspb;
- mark_inode_dirty(inode);
- ufs_free_blocks (inode, tmp, uspi->s_fpb);
- ubh_bforget(tind_bh);
- tind_bh = NULL;
- }
+ 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(tind_bh);
+ tind_bh = NULL;
}
if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh)) {
- ubh_ll_rw_block (SWRITE, 1, &tind_bh);
+ ubh_ll_rw_block(SWRITE, tind_bh);
ubh_wait_on_buffer (tind_bh);
}
ubh_brelse (tind_bh);
- UFSD(("EXIT\n"))
+ UFSD("EXIT: ino %lu\n", inode->i_ino);
return retry;
}
-
-void ufs_truncate (struct inode * inode)
+
+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;
+}
+
+int ufs_truncate(struct inode *inode, loff_t old_i_size)
{
struct ufs_inode_info *ufsi = UFS_I(inode);
- struct super_block * sb;
- struct ufs_sb_private_info * uspi;
- int retry;
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ int retry, err = 0;
- UFSD(("ENTER\n"))
- sb = inode->i_sb;
- uspi = UFS_SB(sb)->s_uspi;
+ UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
+ inode->i_ino, (unsigned long long)i_size_read(inode),
+ (unsigned long long)old_i_size);
- if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)))
- return;
+ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)))
+ return -EINVAL;
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
- return;
+ return -EPERM;
- block_truncate_page(inode->i_mapping, inode->i_size, ufs_getfrag_block);
+ err = ufs_alloc_lastblock(inode);
+
+ if (err) {
+ i_size_write(inode, old_i_size);
+ goto out;
+ }
+
+ block_truncate_page(inode->i_mapping, inode->i_size, ufs_getfrag_block);
lock_kernel();
while (1) {
retry = ufs_trunc_direct(inode);
- retry |= ufs_trunc_indirect (inode, UFS_IND_BLOCK,
- (__fs32 *) &ufsi->i_u1.i_data[UFS_IND_BLOCK]);
- retry |= ufs_trunc_dindirect (inode, UFS_IND_BLOCK + uspi->s_apb,
- (__fs32 *) &ufsi->i_u1.i_data[UFS_DIND_BLOCK]);
+ retry |= ufs_trunc_indirect(inode, UFS_IND_BLOCK,
+ ufs_get_direct_data_ptr(uspi, ufsi,
+ UFS_IND_BLOCK));
+ retry |= ufs_trunc_dindirect(inode, UFS_IND_BLOCK + uspi->s_apb,
+ ufs_get_direct_data_ptr(uspi, ufsi,
+ UFS_DIND_BLOCK));
retry |= ufs_trunc_tindirect (inode);
if (!retry)
break;
ufsi->i_lastfrag = DIRECT_FRAGMENT;
unlock_kernel();
mark_inode_dirty(inode);
- UFSD(("EXIT\n"))
+out:
+ UFSD("EXIT: err %d\n", err);
+ return err;
+}
+
+
+/*
+ * We don't define our `inode->i_op->truncate', and call it here,
+ * because of:
+ * - there is no way to know old size
+ * - there is no way inform user about error, if it happens in `truncate'
+ */
+static int ufs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = dentry->d_inode;
+ unsigned int ia_valid = attr->ia_valid;
+ int error;
+
+ error = inode_change_ok(inode, attr);
+ if (error)
+ return error;
+
+ if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
+ (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
+ error = dquot_transfer(inode, attr);
+ if (error)
+ return error;
+ }
+ if (ia_valid & ATTR_SIZE &&
+ attr->ia_size != i_size_read(inode)) {
+ loff_t old_i_size = inode->i_size;
+
+ vfs_dq_init(inode);
+
+ error = vmtruncate(inode, attr->ia_size);
+ if (error)
+ return error;
+ error = ufs_truncate(inode, old_i_size);
+ if (error)
+ return error;
+ }
+ return inode_setattr(inode, attr);
}
+
+const struct inode_operations ufs_file_inode_operations = {
+ .setattr = ufs_setattr,
+};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff