#include "swab.h"
#include "util.h"
-static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock);
-
-static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
+static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
{
struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
int ptrs = uspi->s_apb;
return n;
}
+typedef struct {
+ void *p;
+ union {
+ __fs32 key32;
+ __fs64 key64;
+ };
+ struct buffer_head *bh;
+} Indirect;
+
+static inline int grow_chain32(struct ufs_inode_info *ufsi,
+ struct buffer_head *bh, __fs32 *v,
+ Indirect *from, Indirect *to)
+{
+ Indirect *p;
+ unsigned seq;
+ to->bh = bh;
+ do {
+ seq = read_seqbegin(&ufsi->meta_lock);
+ to->key32 = *(__fs32 *)(to->p = v);
+ for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
+ ;
+ } while (read_seqretry(&ufsi->meta_lock, seq));
+ return (p > to);
+}
+
+static inline int grow_chain64(struct ufs_inode_info *ufsi,
+ struct buffer_head *bh, __fs64 *v,
+ Indirect *from, Indirect *to)
+{
+ Indirect *p;
+ unsigned seq;
+ to->bh = bh;
+ do {
+ seq = read_seqbegin(&ufsi->meta_lock);
+ to->key64 = *(__fs64 *)(to->p = v);
+ for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
+ ;
+ } while (read_seqretry(&ufsi->meta_lock, seq));
+ return (p > to);
+}
+
/*
* Returns the location of the fragment from
* the beginning of the filesystem.
*/
-static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock)
+static u64 ufs_frag_map(struct inode *inode, sector_t frag)
{
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;
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);
- u64 ret = 0L;
- __fs32 block;
- __fs64 u2_block = 0L;
unsigned flags = UFS_SB(sb)->s_flags;
- u64 temp = 0L;
+ u64 res = 0;
UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth);
UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
(unsigned long long)mask);
if (depth == 0)
- return 0;
+ goto no_block;
+again:
p = offsets;
- if (needs_lock)
- lock_ufs(sb);
if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
goto ufs2;
- block = ufsi->i_u1.i_data[*p++];
- if (!block)
- goto out;
+ if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
+ goto changed;
+ if (!q->key32)
+ goto no_block;
while (--depth) {
+ __fs32 *ptr;
struct buffer_head *bh;
- sector_t n = *p++;
+ unsigned n = *p++;
- bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
+ bh = sb_bread(sb, uspi->s_sbbase +
+ fs32_to_cpu(sb, q->key32) + (n>>shift));
if (!bh)
- goto out;
- block = ((__fs32 *) bh->b_data)[n & mask];
- brelse (bh);
- if (!block)
- goto out;
+ goto no_block;
+ ptr = (__fs32 *)bh->b_data + (n & mask);
+ if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
+ goto changed;
+ if (!q->key32)
+ goto no_block;
}
- ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
- goto out;
-ufs2:
- u2_block = ufsi->i_u1.u2_i_data[*p++];
- if (!u2_block)
- goto out;
+ res = fs32_to_cpu(sb, q->key32);
+ goto found;
+ufs2:
+ if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
+ goto changed;
+ if (!q->key64)
+ goto no_block;
while (--depth) {
+ __fs64 *ptr;
struct buffer_head *bh;
- sector_t n = *p++;
-
+ unsigned n = *p++;
- temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
- bh = sb_bread(sb, temp +(u64) (n>>shift));
+ bh = sb_bread(sb, uspi->s_sbbase +
+ fs64_to_cpu(sb, q->key64) + (n>>shift));
if (!bh)
- goto out;
- u2_block = ((__fs64 *)bh->b_data)[n & mask];
- brelse(bh);
- if (!u2_block)
- goto out;
+ goto no_block;
+ ptr = (__fs64 *)bh->b_data + (n & mask);
+ if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
+ goto changed;
+ if (!q->key64)
+ goto no_block;
+ }
+ res = fs64_to_cpu(sb, q->key64);
+found:
+ res += uspi->s_sbbase + (frag & uspi->s_fpbmask);
+no_block:
+ while (q > chain) {
+ brelse(q->bh);
+ q--;
}
- temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
- ret = temp + (u64) (frag & uspi->s_fpbmask);
+ return res;
-out:
- if (needs_lock)
- unlock_ufs(sb);
- return ret;
+changed:
+ while (q > chain) {
+ brelse(q->bh);
+ q--;
+ }
+ goto again;
}
/**
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);
if (ufs_data_ptr_to_cpu(sb, p))
goto repeat;
goto out;
- }
+ }
if (!phys) {
* 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);
int ret, err, new;
unsigned long ptr,phys;
u64 phys64 = 0;
- bool needs_lock = (sbi->mutex_owner != current);
-
+
if (!create) {
- phys64 = ufs_frag_map(inode, fragment, needs_lock);
+ phys64 = ufs_frag_map(inode, fragment);
UFSD("phys64 = %llu\n", (unsigned long long)phys64);
if (phys64)
map_bh(bh_result, sb, phys64);
ret = 0;
bh = NULL;
- if (needs_lock)
- lock_ufs(sb);
+ mutex_lock(&UFS_I(inode)->truncate_mutex);
UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
if (fragment >
err = 0;
ptr = fragment;
-
+
/*
* ok, these macros clean the logic up a bit and make
* it much more readable:
set_buffer_new(bh_result);
map_bh(bh_result, sb, phys);
abort:
- if (needs_lock)
- unlock_ufs(sb);
+ mutex_unlock(&UFS_I(inode)->truncate_mutex);
return err;
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;
- if (to > inode->i_size)
+ if (to > inode->i_size) {
truncate_pagecache(inode, inode->i_size);
+ ufs_truncate_blocks(inode);
+ }
}
static int ufs_write_begin(struct file *file, struct address_space *mapping,
return ret;
}
+static int ufs_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata)
+{
+ int ret;
+
+ ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
+ if (ret < len)
+ ufs_write_failed(mapping, pos + len);
+ return ret;
+}
+
static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
{
return generic_block_bmap(mapping,block,ufs_getfrag_block);
.readpage = ufs_readpage,
.writepage = ufs_writepage,
.write_begin = ufs_write_begin,
- .write_end = generic_write_end,
+ .write_end = ufs_write_end,
.bmap = ufs_bmap
};
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.
*/
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));
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;
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;
}
int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
- int ret;
- lock_ufs(inode->i_sb);
- ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
- unlock_ufs(inode->i_sb);
- return ret;
+ return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
}
int ufs_sync_inode (struct inode *inode)
truncate_inode_pages_final(&inode->i_data);
if (want_delete) {
- loff_t old_i_size;
- /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
- lock_ufs(inode->i_sb);
- mark_inode_dirty(inode);
- ufs_update_inode(inode, IS_SYNC(inode));
- old_i_size = inode->i_size;
inode->i_size = 0;
- if (inode->i_blocks && ufs_truncate(inode, old_i_size))
- ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
- unlock_ufs(inode->i_sb);
+ if (inode->i_blocks)
+ ufs_truncate_blocks(inode);
}
invalidate_inode_buffers(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, unsigned from, void *p)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct ufs_buffer_head * ind_ubh;
+ void *ind;
+ u64 tmp, frag_to_free = 0;
+ unsigned free_count = 0;
+ bool to_free = !from;
+ unsigned i;
+
+ 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;
+ }
+
+ for (i = from; 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);
+ }
+ if (to_free) {
+ 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);
+ return;
+ }
+ if (IS_SYNC(inode) && ubh_buffer_dirty(ind_ubh))
+ ubh_sync_block(ind_ubh);
+ ubh_brelse (ind_ubh);
+}
+
+static void ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct ufs_buffer_head *dind_bh;
+ u64 tmp;
+ void *dind;
+ bool free_it = !offset;
+ unsigned dindirect_block = offset >> uspi->s_apbshift;
+ unsigned from = offset & uspi->s_apbmask;
+ unsigned i;
+
+ 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++, from = 0) {
+ dind = ubh_get_data_ptr(uspi, dind_bh, i);
+ tmp = ufs_data_ptr_to_cpu(sb, dind);
+ if (!tmp)
+ continue;
+ ufs_trunc_indirect(inode, from, dind);
+ ubh_mark_buffer_dirty(dind_bh);
+ }
+
+ if (free_it) {
+ 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);
+ return;
+ }
+ if (IS_SYNC(inode) && ubh_buffer_dirty(dind_bh))
+ ubh_sync_block(dind_bh);
+ ubh_brelse (dind_bh);
+}
+
+static void ufs_trunc_tindirect(struct inode *inode, u64 offset)
+{
+ 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 tmp;
+ void *tind, *p;
+ bool free_it = !offset;
+ unsigned tindirect_block = offset >> uspi->s_2apbshift;
+ unsigned i;
+
+ offset -= tindirect_block << uspi->s_2apbshift;
+
+ 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++, offset = 0) {
+ tind = ubh_get_data_ptr(uspi, tind_bh, i);
+ ufs_trunc_dindirect(inode, offset, tind);
+ ubh_mark_buffer_dirty(tind_bh);
+ }
+ if (free_it) {
+ 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);
+ return;
+ }
+ if (IS_SYNC(inode) && ubh_buffer_dirty(tind_bh))
+ ubh_sync_block(tind_bh);
+ ubh_brelse (tind_bh);
+}
+
+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;
+ unsigned offsets[4];
+ int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets);
+
+ mutex_lock(&ufsi->truncate_mutex);
+ switch (depth) {
+ case 1:
+ ufs_trunc_direct(inode);
+ ufs_trunc_indirect(inode, 0,
+ ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK));
+ ufs_trunc_dindirect(inode, 0,
+ ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK));
+ ufs_trunc_tindirect(inode, 0);
+ break;
+ case 2:
+ ufs_trunc_indirect(inode, offsets[1],
+ ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK));
+ ufs_trunc_dindirect(inode, 0,
+ ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK));
+ ufs_trunc_tindirect(inode, 0);
+ break;
+ case 3:
+ ufs_trunc_dindirect(inode,
+ (offsets[1] << uspi->s_apbshift) + offsets[2],
+ ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK));
+ ufs_trunc_tindirect(inode, 0);
+ break;
+ case 4:
+ ufs_trunc_tindirect(inode,
+ (offsets[1] << uspi->s_2apbshift) +
+ (offsets[2] << uspi->s_apbshift) +
+ offsets[3]);
+ }
+ 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,
+};
projects / deliverable / linux.git / blobdiff