forked from Minki/linux
ufs: move truncate code into inode.c
It is closely tied to block pointers handling there, can benefit from existing helpers, etc. - no point keeping them apart. Trimmed the trailing whitespaces in inode.c at the same time. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
0d23cf7616
commit
010d331fc3
@ -5,5 +5,5 @@
|
||||
obj-$(CONFIG_UFS_FS) += ufs.o
|
||||
|
||||
ufs-objs := balloc.o cylinder.o dir.o file.o ialloc.o inode.o \
|
||||
namei.o super.o symlink.o truncate.o util.o
|
||||
namei.o super.o symlink.o util.o
|
||||
ccflags-$(CONFIG_UFS_DEBUG) += -DDEBUG
|
||||
|
||||
480
fs/ufs/inode.c
480
fs/ufs/inode.c
@ -126,7 +126,7 @@ static u64 ufs_frag_map(struct inode *inode, sector_t frag)
|
||||
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
||||
u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
|
||||
int shift = uspi->s_apbshift-uspi->s_fpbshift;
|
||||
sector_t offsets[4], *p;
|
||||
unsigned offsets[4], *p;
|
||||
Indirect chain[4], *q = chain;
|
||||
int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
|
||||
unsigned flags = UFS_SB(sb)->s_flags;
|
||||
@ -290,14 +290,14 @@ repeat:
|
||||
return NULL;
|
||||
}
|
||||
lastfrag = ufsi->i_lastfrag;
|
||||
|
||||
|
||||
}
|
||||
tmp = ufs_data_ptr_to_cpu(sb,
|
||||
ufs_get_direct_data_ptr(uspi, ufsi,
|
||||
lastblock));
|
||||
if (tmp)
|
||||
goal = tmp + uspi->s_fpb;
|
||||
tmp = ufs_new_fragments (inode, p, fragment - blockoff,
|
||||
tmp = ufs_new_fragments (inode, p, fragment - blockoff,
|
||||
goal, required + blockoff,
|
||||
err,
|
||||
phys != NULL ? locked_page : NULL);
|
||||
@ -436,7 +436,7 @@ repeat:
|
||||
if (ufs_data_ptr_to_cpu(sb, p))
|
||||
goto repeat;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
if (!phys) {
|
||||
@ -463,7 +463,7 @@ out:
|
||||
* readpage, writepage and so on
|
||||
*/
|
||||
|
||||
int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
|
||||
static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
|
||||
{
|
||||
struct super_block * sb = inode->i_sb;
|
||||
struct ufs_sb_info * sbi = UFS_SB(sb);
|
||||
@ -472,7 +472,7 @@ int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head
|
||||
int ret, err, new;
|
||||
unsigned long ptr,phys;
|
||||
u64 phys64 = 0;
|
||||
|
||||
|
||||
if (!create) {
|
||||
phys64 = ufs_frag_map(inode, fragment);
|
||||
UFSD("phys64 = %llu\n", (unsigned long long)phys64);
|
||||
@ -498,7 +498,7 @@ int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head
|
||||
|
||||
err = 0;
|
||||
ptr = fragment;
|
||||
|
||||
|
||||
/*
|
||||
* ok, these macros clean the logic up a bit and make
|
||||
* it much more readable:
|
||||
@ -574,6 +574,8 @@ int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
|
||||
return __block_write_begin(page, pos, len, ufs_getfrag_block);
|
||||
}
|
||||
|
||||
static void ufs_truncate_blocks(struct inode *);
|
||||
|
||||
static void ufs_write_failed(struct address_space *mapping, loff_t to)
|
||||
{
|
||||
struct inode *inode = mapping->host;
|
||||
@ -661,7 +663,7 @@ static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
|
||||
ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Linux now has 32-bit uid and gid, so we can support EFT.
|
||||
*/
|
||||
@ -681,7 +683,7 @@ static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
|
||||
ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
|
||||
ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
|
||||
|
||||
|
||||
|
||||
if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
|
||||
memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
|
||||
sizeof(ufs_inode->ui_u2.ui_addr));
|
||||
@ -815,7 +817,7 @@ static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
|
||||
|
||||
ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
|
||||
ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
|
||||
|
||||
|
||||
ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
|
||||
ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
|
||||
ufs_inode->ui_atime.tv_usec = 0;
|
||||
@ -917,12 +919,12 @@ static int ufs_update_inode(struct inode * inode, int do_sync)
|
||||
|
||||
ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
|
||||
}
|
||||
|
||||
|
||||
mark_buffer_dirty(bh);
|
||||
if (do_sync)
|
||||
sync_dirty_buffer(bh);
|
||||
brelse (bh);
|
||||
|
||||
|
||||
UFSD("EXIT\n");
|
||||
return 0;
|
||||
}
|
||||
@ -957,3 +959,457 @@ void ufs_evict_inode(struct inode * inode)
|
||||
if (want_delete)
|
||||
ufs_free_inode(inode);
|
||||
}
|
||||
|
||||
#define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
|
||||
#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
|
||||
|
||||
static void 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;
|
||||
|
||||
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;
|
||||
|
||||
frag1 = DIRECT_FRAGMENT;
|
||||
frag4 = min_t(u64, 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;
|
||||
write_seqlock(&ufsi->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&ufsi->meta_lock);
|
||||
|
||||
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);
|
||||
write_seqlock(&ufsi->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&ufsi->meta_lock);
|
||||
|
||||
ufs_free_fragments (inode, tmp, frag4);
|
||||
mark_inode_dirty(inode);
|
||||
next3:
|
||||
|
||||
UFSD("EXIT: ino %lu\n", inode->i_ino);
|
||||
}
|
||||
|
||||
|
||||
static void 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;
|
||||
|
||||
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;
|
||||
|
||||
tmp = ufs_data_ptr_to_cpu(sb, p);
|
||||
if (!tmp)
|
||||
return;
|
||||
ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize);
|
||||
if (!ind_ubh) {
|
||||
write_seqlock(&UFS_I(inode)->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&UFS_I(inode)->meta_lock);
|
||||
return;
|
||||
}
|
||||
|
||||
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;
|
||||
|
||||
write_seqlock(&UFS_I(inode)->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, ind);
|
||||
write_sequnlock(&UFS_I(inode)->meta_lock);
|
||||
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);
|
||||
write_seqlock(&UFS_I(inode)->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&UFS_I(inode)->meta_lock);
|
||||
|
||||
ubh_bforget(ind_ubh);
|
||||
ufs_free_blocks (inode, tmp, uspi->s_fpb);
|
||||
mark_inode_dirty(inode);
|
||||
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);
|
||||
}
|
||||
|
||||
static void 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;
|
||||
|
||||
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;
|
||||
|
||||
tmp = ufs_data_ptr_to_cpu(sb, p);
|
||||
if (!tmp)
|
||||
return;
|
||||
dind_bh = ubh_bread(sb, tmp, uspi->s_bsize);
|
||||
if (!dind_bh) {
|
||||
write_seqlock(&UFS_I(inode)->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&UFS_I(inode)->meta_lock);
|
||||
return;
|
||||
}
|
||||
|
||||
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;
|
||||
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);
|
||||
write_seqlock(&UFS_I(inode)->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&UFS_I(inode)->meta_lock);
|
||||
|
||||
ubh_bforget(dind_bh);
|
||||
ufs_free_blocks(inode, tmp, uspi->s_fpb);
|
||||
mark_inode_dirty(inode);
|
||||
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);
|
||||
}
|
||||
|
||||
static void 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 ufs_buffer_head * tind_bh;
|
||||
u64 tindirect_block, tmp, i;
|
||||
void *tind, *p;
|
||||
|
||||
UFSD("ENTER: ino %lu\n", inode->i_ino);
|
||||
|
||||
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 = ufs_get_direct_data_ptr(uspi, ufsi, UFS_TIND_BLOCK);
|
||||
if (!(tmp = ufs_data_ptr_to_cpu(sb, p)))
|
||||
return;
|
||||
tind_bh = ubh_bread (sb, tmp, uspi->s_bsize);
|
||||
if (!tind_bh) {
|
||||
write_seqlock(&ufsi->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&ufsi->meta_lock);
|
||||
return;
|
||||
}
|
||||
|
||||
for (i = tindirect_block ; i < uspi->s_apb ; i++) {
|
||||
tind = ubh_get_data_ptr(uspi, tind_bh, i);
|
||||
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 (!ufs_is_data_ptr_zero(uspi,
|
||||
ubh_get_data_ptr(uspi, tind_bh, i)))
|
||||
break;
|
||||
if (i >= uspi->s_apb) {
|
||||
tmp = ufs_data_ptr_to_cpu(sb, p);
|
||||
write_seqlock(&ufsi->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&ufsi->meta_lock);
|
||||
|
||||
ubh_bforget(tind_bh);
|
||||
ufs_free_blocks(inode, tmp, uspi->s_fpb);
|
||||
mark_inode_dirty(inode);
|
||||
tind_bh = NULL;
|
||||
}
|
||||
if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh))
|
||||
ubh_sync_block(tind_bh);
|
||||
ubh_brelse (tind_bh);
|
||||
|
||||
UFSD("EXIT: ino %lu\n", inode->i_ino);
|
||||
}
|
||||
|
||||
static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
|
||||
{
|
||||
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 = (size + 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 void __ufs_truncate_blocks(struct inode *inode)
|
||||
{
|
||||
struct ufs_inode_info *ufsi = UFS_I(inode);
|
||||
struct super_block *sb = inode->i_sb;
|
||||
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
||||
|
||||
mutex_lock(&ufsi->truncate_mutex);
|
||||
ufs_trunc_direct(inode);
|
||||
ufs_trunc_indirect(inode, UFS_IND_BLOCK,
|
||||
ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK));
|
||||
ufs_trunc_dindirect(inode, UFS_IND_BLOCK + uspi->s_apb,
|
||||
ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK));
|
||||
ufs_trunc_tindirect(inode);
|
||||
ufsi->i_lastfrag = DIRECT_FRAGMENT;
|
||||
mutex_unlock(&ufsi->truncate_mutex);
|
||||
}
|
||||
|
||||
static int ufs_truncate(struct inode *inode, loff_t size)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
|
||||
inode->i_ino, (unsigned long long)size,
|
||||
(unsigned long long)i_size_read(inode));
|
||||
|
||||
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 -EPERM;
|
||||
|
||||
err = ufs_alloc_lastblock(inode, size);
|
||||
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
|
||||
|
||||
truncate_setsize(inode, size);
|
||||
|
||||
__ufs_truncate_blocks(inode);
|
||||
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
|
||||
mark_inode_dirty(inode);
|
||||
out:
|
||||
UFSD("EXIT: err %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
void ufs_truncate_blocks(struct inode *inode)
|
||||
{
|
||||
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
|
||||
S_ISLNK(inode->i_mode)))
|
||||
return;
|
||||
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
|
||||
return;
|
||||
__ufs_truncate_blocks(inode);
|
||||
}
|
||||
|
||||
int ufs_setattr(struct dentry *dentry, struct iattr *attr)
|
||||
{
|
||||
struct inode *inode = d_inode(dentry);
|
||||
unsigned int ia_valid = attr->ia_valid;
|
||||
int error;
|
||||
|
||||
error = inode_change_ok(inode, attr);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
|
||||
error = ufs_truncate(inode, attr->ia_size);
|
||||
if (error)
|
||||
return error;
|
||||
}
|
||||
|
||||
setattr_copy(inode, attr);
|
||||
mark_inode_dirty(inode);
|
||||
return 0;
|
||||
}
|
||||
|
||||
const struct inode_operations ufs_file_inode_operations = {
|
||||
.setattr = ufs_setattr,
|
||||
};
|
||||
|
||||
@ -1,515 +0,0 @@
|
||||
/*
|
||||
* linux/fs/ufs/truncate.c
|
||||
*
|
||||
* Copyright (C) 1998
|
||||
* Daniel Pirkl <daniel.pirkl@email.cz>
|
||||
* Charles University, Faculty of Mathematics and Physics
|
||||
*
|
||||
* from
|
||||
*
|
||||
* linux/fs/ext2/truncate.c
|
||||
*
|
||||
* Copyright (C) 1992, 1993, 1994, 1995
|
||||
* Remy Card (card@masi.ibp.fr)
|
||||
* Laboratoire MASI - Institut Blaise Pascal
|
||||
* Universite Pierre et Marie Curie (Paris VI)
|
||||
*
|
||||
* from
|
||||
*
|
||||
* linux/fs/minix/truncate.c
|
||||
*
|
||||
* Copyright (C) 1991, 1992 Linus Torvalds
|
||||
*
|
||||
* Big-endian to little-endian byte-swapping/bitmaps by
|
||||
* David S. Miller (davem@caip.rutgers.edu), 1995
|
||||
*/
|
||||
|
||||
/*
|
||||
* Real random numbers for secure rm added 94/02/18
|
||||
* Idea from Pierre del Perugia <delperug@gla.ecoledoc.ibp.fr>
|
||||
*/
|
||||
|
||||
/*
|
||||
* 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/fcntl.h>
|
||||
#include <linux/time.h>
|
||||
#include <linux/stat.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/buffer_head.h>
|
||||
#include <linux/blkdev.h>
|
||||
#include <linux/sched.h>
|
||||
|
||||
#include "ufs_fs.h"
|
||||
#include "ufs.h"
|
||||
#include "swab.h"
|
||||
#include "util.h"
|
||||
|
||||
/*
|
||||
* Secure deletion currently doesn't work. It interacts very badly
|
||||
* with buffers shared with memory mappings, and for that reason
|
||||
* can't be done in the truncate() routines. It should instead be
|
||||
* done separately in "release()" before calling the truncate routines
|
||||
* that will release the actual file blocks.
|
||||
*
|
||||
* Linus
|
||||
*/
|
||||
|
||||
#define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
|
||||
#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
|
||||
|
||||
|
||||
static void 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;
|
||||
|
||||
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;
|
||||
|
||||
frag1 = DIRECT_FRAGMENT;
|
||||
frag4 = min_t(u64, 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;
|
||||
write_seqlock(&ufsi->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&ufsi->meta_lock);
|
||||
|
||||
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);
|
||||
write_seqlock(&ufsi->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&ufsi->meta_lock);
|
||||
|
||||
ufs_free_fragments (inode, tmp, frag4);
|
||||
mark_inode_dirty(inode);
|
||||
next3:
|
||||
|
||||
UFSD("EXIT: ino %lu\n", inode->i_ino);
|
||||
}
|
||||
|
||||
|
||||
static void 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;
|
||||
|
||||
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;
|
||||
|
||||
tmp = ufs_data_ptr_to_cpu(sb, p);
|
||||
if (!tmp)
|
||||
return;
|
||||
ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize);
|
||||
if (!ind_ubh) {
|
||||
write_seqlock(&UFS_I(inode)->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&UFS_I(inode)->meta_lock);
|
||||
return;
|
||||
}
|
||||
|
||||
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;
|
||||
|
||||
write_seqlock(&UFS_I(inode)->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, ind);
|
||||
write_sequnlock(&UFS_I(inode)->meta_lock);
|
||||
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);
|
||||
write_seqlock(&UFS_I(inode)->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&UFS_I(inode)->meta_lock);
|
||||
|
||||
ubh_bforget(ind_ubh);
|
||||
ufs_free_blocks (inode, tmp, uspi->s_fpb);
|
||||
mark_inode_dirty(inode);
|
||||
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);
|
||||
}
|
||||
|
||||
static void 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;
|
||||
|
||||
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;
|
||||
|
||||
tmp = ufs_data_ptr_to_cpu(sb, p);
|
||||
if (!tmp)
|
||||
return;
|
||||
dind_bh = ubh_bread(sb, tmp, uspi->s_bsize);
|
||||
if (!dind_bh) {
|
||||
write_seqlock(&UFS_I(inode)->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&UFS_I(inode)->meta_lock);
|
||||
return;
|
||||
}
|
||||
|
||||
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;
|
||||
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);
|
||||
write_seqlock(&UFS_I(inode)->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&UFS_I(inode)->meta_lock);
|
||||
|
||||
ubh_bforget(dind_bh);
|
||||
ufs_free_blocks(inode, tmp, uspi->s_fpb);
|
||||
mark_inode_dirty(inode);
|
||||
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);
|
||||
}
|
||||
|
||||
static void 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 ufs_buffer_head * tind_bh;
|
||||
u64 tindirect_block, tmp, i;
|
||||
void *tind, *p;
|
||||
|
||||
UFSD("ENTER: ino %lu\n", inode->i_ino);
|
||||
|
||||
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 = ufs_get_direct_data_ptr(uspi, ufsi, UFS_TIND_BLOCK);
|
||||
if (!(tmp = ufs_data_ptr_to_cpu(sb, p)))
|
||||
return;
|
||||
tind_bh = ubh_bread (sb, tmp, uspi->s_bsize);
|
||||
if (!tind_bh) {
|
||||
write_seqlock(&ufsi->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&ufsi->meta_lock);
|
||||
return;
|
||||
}
|
||||
|
||||
for (i = tindirect_block ; i < uspi->s_apb ; i++) {
|
||||
tind = ubh_get_data_ptr(uspi, tind_bh, i);
|
||||
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 (!ufs_is_data_ptr_zero(uspi,
|
||||
ubh_get_data_ptr(uspi, tind_bh, i)))
|
||||
break;
|
||||
if (i >= uspi->s_apb) {
|
||||
tmp = ufs_data_ptr_to_cpu(sb, p);
|
||||
write_seqlock(&ufsi->meta_lock);
|
||||
ufs_data_ptr_clear(uspi, p);
|
||||
write_sequnlock(&ufsi->meta_lock);
|
||||
|
||||
ubh_bforget(tind_bh);
|
||||
ufs_free_blocks(inode, tmp, uspi->s_fpb);
|
||||
mark_inode_dirty(inode);
|
||||
tind_bh = NULL;
|
||||
}
|
||||
if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh))
|
||||
ubh_sync_block(tind_bh);
|
||||
ubh_brelse (tind_bh);
|
||||
|
||||
UFSD("EXIT: ino %lu\n", inode->i_ino);
|
||||
}
|
||||
|
||||
static int ufs_alloc_lastblock(struct inode *inode, loff_t size)
|
||||
{
|
||||
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 = (size + 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 void __ufs_truncate_blocks(struct inode *inode)
|
||||
{
|
||||
struct ufs_inode_info *ufsi = UFS_I(inode);
|
||||
struct super_block *sb = inode->i_sb;
|
||||
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
||||
|
||||
mutex_lock(&ufsi->truncate_mutex);
|
||||
ufs_trunc_direct(inode);
|
||||
ufs_trunc_indirect(inode, UFS_IND_BLOCK,
|
||||
ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK));
|
||||
ufs_trunc_dindirect(inode, UFS_IND_BLOCK + uspi->s_apb,
|
||||
ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK));
|
||||
ufs_trunc_tindirect(inode);
|
||||
ufsi->i_lastfrag = DIRECT_FRAGMENT;
|
||||
mutex_unlock(&ufsi->truncate_mutex);
|
||||
}
|
||||
|
||||
int ufs_truncate(struct inode *inode, loff_t size)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n",
|
||||
inode->i_ino, (unsigned long long)size,
|
||||
(unsigned long long)i_size_read(inode));
|
||||
|
||||
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 -EPERM;
|
||||
|
||||
err = ufs_alloc_lastblock(inode, size);
|
||||
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
block_truncate_page(inode->i_mapping, size, ufs_getfrag_block);
|
||||
|
||||
truncate_setsize(inode, size);
|
||||
|
||||
__ufs_truncate_blocks(inode);
|
||||
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
|
||||
mark_inode_dirty(inode);
|
||||
out:
|
||||
UFSD("EXIT: err %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
void ufs_truncate_blocks(struct inode *inode)
|
||||
{
|
||||
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
|
||||
S_ISLNK(inode->i_mode)))
|
||||
return;
|
||||
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
|
||||
return;
|
||||
__ufs_truncate_blocks(inode);
|
||||
}
|
||||
|
||||
int ufs_setattr(struct dentry *dentry, struct iattr *attr)
|
||||
{
|
||||
struct inode *inode = d_inode(dentry);
|
||||
unsigned int ia_valid = attr->ia_valid;
|
||||
int error;
|
||||
|
||||
error = inode_change_ok(inode, attr);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
|
||||
error = ufs_truncate(inode, attr->ia_size);
|
||||
if (error)
|
||||
return error;
|
||||
}
|
||||
|
||||
setattr_copy(inode, attr);
|
||||
mark_inode_dirty(inode);
|
||||
return 0;
|
||||
}
|
||||
|
||||
const struct inode_operations ufs_file_inode_operations = {
|
||||
.setattr = ufs_setattr,
|
||||
};
|
||||
@ -122,7 +122,7 @@ extern struct inode *ufs_iget(struct super_block *, unsigned long);
|
||||
extern int ufs_write_inode (struct inode *, struct writeback_control *);
|
||||
extern int ufs_sync_inode (struct inode *);
|
||||
extern void ufs_evict_inode (struct inode *);
|
||||
extern int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create);
|
||||
extern int ufs_setattr(struct dentry *dentry, struct iattr *attr);
|
||||
|
||||
/* namei.c */
|
||||
extern const struct file_operations ufs_dir_operations;
|
||||
@ -140,10 +140,6 @@ void ufs_mark_sb_dirty(struct super_block *sb);
|
||||
extern const struct inode_operations ufs_fast_symlink_inode_operations;
|
||||
extern const struct inode_operations ufs_symlink_inode_operations;
|
||||
|
||||
/* truncate.c */
|
||||
extern void ufs_truncate_blocks(struct inode *);
|
||||
extern int ufs_setattr(struct dentry *dentry, struct iattr *attr);
|
||||
|
||||
static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)
|
||||
{
|
||||
return sb->s_fs_info;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user