6aab6dd379
We always have 0 < depth2 <= depth in there, so if (--depth) { if (--depth2) A B } else { C // not using depth2 } D // not using depth2 is equivalent to if (--depth2) A with s/depth/depth - 1/ if (--depth) B else C D Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1352 lines
36 KiB
C
1352 lines
36 KiB
C
/*
|
|
* linux/fs/ufs/inode.c
|
|
*
|
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* Copyright (C) 1998
|
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* Daniel Pirkl <daniel.pirkl@email.cz>
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* Charles University, Faculty of Mathematics and Physics
|
|
*
|
|
* from
|
|
*
|
|
* linux/fs/ext2/inode.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/inode.c
|
|
*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
*
|
|
* Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
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|
* Big-endian to little-endian byte-swapping/bitmaps by
|
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* David S. Miller (davem@caip.rutgers.edu), 1995
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|
*/
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|
|
|
#include <asm/uaccess.h>
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|
|
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/time.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/buffer_head.h>
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#include <linux/writeback.h>
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|
|
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#include "ufs_fs.h"
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#include "ufs.h"
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#include "swab.h"
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#include "util.h"
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|
|
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static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4])
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|
{
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struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
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int ptrs = uspi->s_apb;
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int ptrs_bits = uspi->s_apbshift;
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const long direct_blocks = UFS_NDADDR,
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indirect_blocks = ptrs,
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double_blocks = (1 << (ptrs_bits * 2));
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int n = 0;
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|
|
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UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
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if (i_block < direct_blocks) {
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offsets[n++] = i_block;
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} else if ((i_block -= direct_blocks) < indirect_blocks) {
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offsets[n++] = UFS_IND_BLOCK;
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offsets[n++] = i_block;
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} else if ((i_block -= indirect_blocks) < double_blocks) {
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offsets[n++] = UFS_DIND_BLOCK;
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offsets[n++] = i_block >> ptrs_bits;
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offsets[n++] = i_block & (ptrs - 1);
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} else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
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offsets[n++] = UFS_TIND_BLOCK;
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offsets[n++] = i_block >> (ptrs_bits * 2);
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offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
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offsets[n++] = i_block & (ptrs - 1);
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} else {
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ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
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}
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return n;
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}
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|
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typedef struct {
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void *p;
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union {
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__fs32 key32;
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__fs64 key64;
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};
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struct buffer_head *bh;
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} Indirect;
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|
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static inline int grow_chain32(struct ufs_inode_info *ufsi,
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struct buffer_head *bh, __fs32 *v,
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Indirect *from, Indirect *to)
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|
{
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|
Indirect *p;
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unsigned seq;
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to->bh = bh;
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do {
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seq = read_seqbegin(&ufsi->meta_lock);
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to->key32 = *(__fs32 *)(to->p = v);
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for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++)
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;
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} while (read_seqretry(&ufsi->meta_lock, seq));
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return (p > to);
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|
}
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|
|
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static inline int grow_chain64(struct ufs_inode_info *ufsi,
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struct buffer_head *bh, __fs64 *v,
|
|
Indirect *from, Indirect *to)
|
|
{
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|
Indirect *p;
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|
unsigned seq;
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to->bh = bh;
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do {
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seq = read_seqbegin(&ufsi->meta_lock);
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to->key64 = *(__fs64 *)(to->p = v);
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for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++)
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;
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|
} while (read_seqretry(&ufsi->meta_lock, seq));
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return (p > to);
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|
}
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|
|
|
/*
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|
* Returns the location of the fragment from
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* the beginning of the filesystem.
|
|
*/
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|
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|
static u64 ufs_frag_map(struct inode *inode, sector_t frag)
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|
{
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|
struct ufs_inode_info *ufsi = UFS_I(inode);
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struct super_block *sb = inode->i_sb;
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struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
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u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
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int shift = uspi->s_apbshift-uspi->s_fpbshift;
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unsigned offsets[4], *p;
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Indirect chain[4], *q = chain;
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int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
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unsigned flags = UFS_SB(sb)->s_flags;
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u64 res = 0;
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|
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UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth);
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UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
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uspi->s_fpbshift, uspi->s_apbmask,
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(unsigned long long)mask);
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|
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if (depth == 0)
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goto no_block;
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|
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|
again:
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p = offsets;
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|
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if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
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goto ufs2;
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|
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if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q))
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goto changed;
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if (!q->key32)
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goto no_block;
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while (--depth) {
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__fs32 *ptr;
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struct buffer_head *bh;
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unsigned n = *p++;
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|
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bh = sb_bread(sb, uspi->s_sbbase +
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fs32_to_cpu(sb, q->key32) + (n>>shift));
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if (!bh)
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goto no_block;
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ptr = (__fs32 *)bh->b_data + (n & mask);
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if (!grow_chain32(ufsi, bh, ptr, chain, ++q))
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goto changed;
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if (!q->key32)
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|
goto no_block;
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|
}
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res = fs32_to_cpu(sb, q->key32);
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goto found;
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|
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|
ufs2:
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if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q))
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goto changed;
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if (!q->key64)
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goto no_block;
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|
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|
while (--depth) {
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__fs64 *ptr;
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struct buffer_head *bh;
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unsigned n = *p++;
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bh = sb_bread(sb, uspi->s_sbbase +
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fs64_to_cpu(sb, q->key64) + (n>>shift));
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if (!bh)
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goto no_block;
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ptr = (__fs64 *)bh->b_data + (n & mask);
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if (!grow_chain64(ufsi, bh, ptr, chain, ++q))
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|
goto changed;
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if (!q->key64)
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|
goto no_block;
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|
}
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|
res = fs64_to_cpu(sb, q->key64);
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|
found:
|
|
res += uspi->s_sbbase + (frag & uspi->s_fpbmask);
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no_block:
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|
while (q > chain) {
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brelse(q->bh);
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q--;
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}
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return res;
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|
changed:
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while (q > chain) {
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brelse(q->bh);
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q--;
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}
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goto again;
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}
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|
/**
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|
* ufs_inode_getfrag() - allocate new fragment(s)
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* @inode: pointer to inode
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* @fragment: number of `fragment' which hold pointer
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* to new allocated fragment(s)
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|
* @new_fragment: number of new allocated fragment(s)
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* @required: how many fragment(s) we require
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* @err: we set it if something wrong
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* @phys: pointer to where we save physical number of new allocated fragments,
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* NULL if we allocate not data(indirect blocks for example).
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* @new: we set it if we allocate new block
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* @locked_page: for ufs_new_fragments()
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*/
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static struct buffer_head *
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ufs_inode_getfrag(struct inode *inode, u64 fragment,
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sector_t new_fragment, unsigned int required, int *err,
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long *phys, int *new, struct page *locked_page)
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|
{
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|
struct ufs_inode_info *ufsi = UFS_I(inode);
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struct super_block *sb = inode->i_sb;
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struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
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struct buffer_head * result;
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unsigned blockoff, lastblockoff;
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u64 tmp, goal, lastfrag, block, lastblock;
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void *p, *p2;
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|
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|
UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
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"metadata %d\n", inode->i_ino, (unsigned long long)fragment,
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(unsigned long long)new_fragment, required, !phys);
|
|
|
|
/* TODO : to be done for write support
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|
if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
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|
goto ufs2;
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|
*/
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|
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block = ufs_fragstoblks (fragment);
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blockoff = ufs_fragnum (fragment);
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p = ufs_get_direct_data_ptr(uspi, ufsi, block);
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|
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goal = 0;
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|
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repeat:
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tmp = ufs_data_ptr_to_cpu(sb, p);
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|
|
|
lastfrag = ufsi->i_lastfrag;
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|
if (tmp && fragment < lastfrag) {
|
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if (!phys) {
|
|
result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
|
|
if (tmp == ufs_data_ptr_to_cpu(sb, p)) {
|
|
UFSD("EXIT, result %llu\n",
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(unsigned long long)tmp + blockoff);
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|
return result;
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|
}
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|
brelse (result);
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|
goto repeat;
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|
} else {
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|
*phys = uspi->s_sbbase + tmp + blockoff;
|
|
return NULL;
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|
}
|
|
}
|
|
|
|
lastblock = ufs_fragstoblks (lastfrag);
|
|
lastblockoff = ufs_fragnum (lastfrag);
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|
/*
|
|
* We will extend file into new block beyond last allocated block
|
|
*/
|
|
if (lastblock < block) {
|
|
/*
|
|
* We must reallocate last allocated block
|
|
*/
|
|
if (lastblockoff) {
|
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p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
|
|
tmp = ufs_new_fragments(inode, p2, lastfrag,
|
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ufs_data_ptr_to_cpu(sb, p2),
|
|
uspi->s_fpb - lastblockoff,
|
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err, locked_page);
|
|
if (!tmp) {
|
|
if (lastfrag != ufsi->i_lastfrag)
|
|
goto repeat;
|
|
else
|
|
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,
|
|
goal, required + blockoff,
|
|
err,
|
|
phys != NULL ? locked_page : NULL);
|
|
} else if (lastblock == block) {
|
|
/*
|
|
* We will extend last allocated block
|
|
*/
|
|
tmp = ufs_new_fragments(inode, p, fragment -
|
|
(blockoff - lastblockoff),
|
|
ufs_data_ptr_to_cpu(sb, p),
|
|
required + (blockoff - lastblockoff),
|
|
err, phys != NULL ? locked_page : NULL);
|
|
} else /* (lastblock > block) */ {
|
|
/*
|
|
* We will allocate new block before last allocated block
|
|
*/
|
|
if (block) {
|
|
tmp = ufs_data_ptr_to_cpu(sb,
|
|
ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
|
|
if (tmp)
|
|
goal = tmp + uspi->s_fpb;
|
|
}
|
|
tmp = ufs_new_fragments(inode, p, fragment - blockoff,
|
|
goal, uspi->s_fpb, err,
|
|
phys != NULL ? locked_page : NULL);
|
|
}
|
|
if (!tmp) {
|
|
if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
|
|
(blockoff && lastfrag != ufsi->i_lastfrag))
|
|
goto repeat;
|
|
*err = -ENOSPC;
|
|
return NULL;
|
|
}
|
|
|
|
if (!phys) {
|
|
result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
|
|
} else {
|
|
*phys = uspi->s_sbbase + tmp + blockoff;
|
|
result = NULL;
|
|
*err = 0;
|
|
*new = 1;
|
|
}
|
|
|
|
inode->i_ctime = CURRENT_TIME_SEC;
|
|
if (IS_SYNC(inode))
|
|
ufs_sync_inode (inode);
|
|
mark_inode_dirty(inode);
|
|
UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff);
|
|
return result;
|
|
|
|
/* This part : To be implemented ....
|
|
Required only for writing, not required for READ-ONLY.
|
|
ufs2:
|
|
|
|
u2_block = ufs_fragstoblks(fragment);
|
|
u2_blockoff = ufs_fragnum(fragment);
|
|
p = ufsi->i_u1.u2_i_data + block;
|
|
goal = 0;
|
|
|
|
repeat2:
|
|
tmp = fs32_to_cpu(sb, *p);
|
|
lastfrag = ufsi->i_lastfrag;
|
|
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* ufs_inode_getblock() - allocate new block
|
|
* @inode: pointer to inode
|
|
* @bh: pointer to block which hold "pointer" to new allocated block
|
|
* @fragment: number of `fragment' which hold pointer
|
|
* to new allocated block
|
|
* @new_fragment: number of new allocated fragment
|
|
* (block will hold this fragment and also uspi->s_fpb-1)
|
|
* @err: see ufs_inode_getfrag()
|
|
* @phys: see ufs_inode_getfrag()
|
|
* @new: see ufs_inode_getfrag()
|
|
* @locked_page: see ufs_inode_getfrag()
|
|
*/
|
|
static struct buffer_head *
|
|
ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
|
|
u64 fragment, sector_t new_fragment, int *err,
|
|
long *phys, int *new, struct page *locked_page)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
|
struct buffer_head * result;
|
|
unsigned blockoff;
|
|
u64 tmp, goal, block;
|
|
void *p;
|
|
|
|
block = ufs_fragstoblks (fragment);
|
|
blockoff = ufs_fragnum (fragment);
|
|
|
|
UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
|
|
inode->i_ino, (unsigned long long)fragment,
|
|
(unsigned long long)new_fragment, !phys);
|
|
|
|
result = NULL;
|
|
if (!bh)
|
|
goto out;
|
|
if (!buffer_uptodate(bh)) {
|
|
ll_rw_block (READ, 1, &bh);
|
|
wait_on_buffer (bh);
|
|
if (!buffer_uptodate(bh))
|
|
goto out;
|
|
}
|
|
if (uspi->fs_magic == UFS2_MAGIC)
|
|
p = (__fs64 *)bh->b_data + block;
|
|
else
|
|
p = (__fs32 *)bh->b_data + block;
|
|
repeat:
|
|
tmp = ufs_data_ptr_to_cpu(sb, p);
|
|
if (tmp) {
|
|
if (!phys) {
|
|
result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
|
|
if (tmp == ufs_data_ptr_to_cpu(sb, p))
|
|
goto out;
|
|
brelse (result);
|
|
goto repeat;
|
|
} else {
|
|
*phys = uspi->s_sbbase + tmp + blockoff;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (block && (uspi->fs_magic == UFS2_MAGIC ?
|
|
(tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
|
|
(tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
|
|
goal = tmp + uspi->s_fpb;
|
|
else
|
|
goal = bh->b_blocknr + uspi->s_fpb;
|
|
tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
|
|
uspi->s_fpb, err, locked_page);
|
|
if (!tmp) {
|
|
if (ufs_data_ptr_to_cpu(sb, p))
|
|
goto repeat;
|
|
goto out;
|
|
}
|
|
|
|
|
|
if (!phys) {
|
|
result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
|
|
} else {
|
|
*phys = uspi->s_sbbase + tmp + blockoff;
|
|
*new = 1;
|
|
}
|
|
|
|
mark_buffer_dirty(bh);
|
|
if (IS_SYNC(inode))
|
|
sync_dirty_buffer(bh);
|
|
inode->i_ctime = CURRENT_TIME_SEC;
|
|
mark_inode_dirty(inode);
|
|
UFSD("result %llu\n", (unsigned long long)tmp + blockoff);
|
|
out:
|
|
brelse (bh);
|
|
UFSD("EXIT\n");
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* ufs_getfrag_block() - `get_block_t' function, interface between UFS and
|
|
* readpage, writepage and so on
|
|
*/
|
|
|
|
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);
|
|
struct ufs_sb_private_info * uspi = sbi->s_uspi;
|
|
struct buffer_head * bh;
|
|
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);
|
|
if (phys64)
|
|
map_bh(bh_result, sb, phys64);
|
|
return 0;
|
|
}
|
|
|
|
/* This code entered only while writing ....? */
|
|
|
|
err = -EIO;
|
|
new = 0;
|
|
ret = 0;
|
|
bh = NULL;
|
|
|
|
mutex_lock(&UFS_I(inode)->truncate_mutex);
|
|
|
|
UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
|
|
if (fragment >
|
|
((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
|
|
<< uspi->s_fpbshift))
|
|
goto abort_too_big;
|
|
|
|
err = 0;
|
|
ptr = fragment;
|
|
|
|
/*
|
|
* ok, these macros clean the logic up a bit and make
|
|
* it much more readable:
|
|
*/
|
|
#define GET_INODE_DATABLOCK(x) \
|
|
ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
|
|
bh_result->b_page)
|
|
#define GET_INODE_PTR(x) \
|
|
ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
|
|
bh_result->b_page)
|
|
#define GET_INDIRECT_DATABLOCK(x) \
|
|
ufs_inode_getblock(inode, bh, x, fragment, \
|
|
&err, &phys, &new, bh_result->b_page)
|
|
#define GET_INDIRECT_PTR(x) \
|
|
ufs_inode_getblock(inode, bh, x, fragment, \
|
|
&err, NULL, NULL, NULL)
|
|
|
|
if (ptr < UFS_NDIR_FRAGMENT) {
|
|
bh = GET_INODE_DATABLOCK(ptr);
|
|
goto out;
|
|
}
|
|
ptr -= UFS_NDIR_FRAGMENT;
|
|
if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
|
|
bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
|
|
goto get_indirect;
|
|
}
|
|
ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
|
|
if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
|
|
bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
|
|
goto get_double;
|
|
}
|
|
ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
|
|
bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
|
|
bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
|
|
get_double:
|
|
bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
|
|
get_indirect:
|
|
bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
|
|
|
|
#undef GET_INODE_DATABLOCK
|
|
#undef GET_INODE_PTR
|
|
#undef GET_INDIRECT_DATABLOCK
|
|
#undef GET_INDIRECT_PTR
|
|
|
|
out:
|
|
if (err)
|
|
goto abort;
|
|
if (new)
|
|
set_buffer_new(bh_result);
|
|
map_bh(bh_result, sb, phys);
|
|
abort:
|
|
mutex_unlock(&UFS_I(inode)->truncate_mutex);
|
|
|
|
return err;
|
|
|
|
abort_too_big:
|
|
ufs_warning(sb, "ufs_get_block", "block > big");
|
|
goto abort;
|
|
}
|
|
|
|
static int ufs_writepage(struct page *page, struct writeback_control *wbc)
|
|
{
|
|
return block_write_full_page(page,ufs_getfrag_block,wbc);
|
|
}
|
|
|
|
static int ufs_readpage(struct file *file, struct page *page)
|
|
{
|
|
return block_read_full_page(page,ufs_getfrag_block);
|
|
}
|
|
|
|
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;
|
|
|
|
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,
|
|
loff_t pos, unsigned len, unsigned flags,
|
|
struct page **pagep, void **fsdata)
|
|
{
|
|
int ret;
|
|
|
|
ret = block_write_begin(mapping, pos, len, flags, pagep,
|
|
ufs_getfrag_block);
|
|
if (unlikely(ret))
|
|
ufs_write_failed(mapping, pos + len);
|
|
|
|
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);
|
|
}
|
|
|
|
const struct address_space_operations ufs_aops = {
|
|
.readpage = ufs_readpage,
|
|
.writepage = ufs_writepage,
|
|
.write_begin = ufs_write_begin,
|
|
.write_end = ufs_write_end,
|
|
.bmap = ufs_bmap
|
|
};
|
|
|
|
static void ufs_set_inode_ops(struct inode *inode)
|
|
{
|
|
if (S_ISREG(inode->i_mode)) {
|
|
inode->i_op = &ufs_file_inode_operations;
|
|
inode->i_fop = &ufs_file_operations;
|
|
inode->i_mapping->a_ops = &ufs_aops;
|
|
} else if (S_ISDIR(inode->i_mode)) {
|
|
inode->i_op = &ufs_dir_inode_operations;
|
|
inode->i_fop = &ufs_dir_operations;
|
|
inode->i_mapping->a_ops = &ufs_aops;
|
|
} else if (S_ISLNK(inode->i_mode)) {
|
|
if (!inode->i_blocks) {
|
|
inode->i_op = &ufs_fast_symlink_inode_operations;
|
|
inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
|
|
} else {
|
|
inode->i_op = &ufs_symlink_inode_operations;
|
|
inode->i_mapping->a_ops = &ufs_aops;
|
|
}
|
|
} else
|
|
init_special_inode(inode, inode->i_mode,
|
|
ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
|
|
}
|
|
|
|
static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
|
|
{
|
|
struct ufs_inode_info *ufsi = UFS_I(inode);
|
|
struct super_block *sb = inode->i_sb;
|
|
umode_t mode;
|
|
|
|
/*
|
|
* Copy data to the in-core inode.
|
|
*/
|
|
inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
|
|
set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
|
|
if (inode->i_nlink == 0) {
|
|
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.
|
|
*/
|
|
i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
|
|
i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
|
|
|
|
inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
|
|
inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
|
|
inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
|
|
inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
|
|
inode->i_mtime.tv_nsec = 0;
|
|
inode->i_atime.tv_nsec = 0;
|
|
inode->i_ctime.tv_nsec = 0;
|
|
inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
|
|
inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
|
|
ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
|
|
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));
|
|
} else {
|
|
memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
|
|
sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
|
|
ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
|
|
{
|
|
struct ufs_inode_info *ufsi = UFS_I(inode);
|
|
struct super_block *sb = inode->i_sb;
|
|
umode_t mode;
|
|
|
|
UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
|
|
/*
|
|
* Copy data to the in-core inode.
|
|
*/
|
|
inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
|
|
set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
|
|
if (inode->i_nlink == 0) {
|
|
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.
|
|
*/
|
|
i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
|
|
i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
|
|
|
|
inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
|
|
inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
|
|
inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
|
|
inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
|
|
inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
|
|
inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
|
|
inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
|
|
inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
|
|
inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
|
|
ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
|
|
/*
|
|
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.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
|
|
sizeof(ufs2_inode->ui_u2.ui_addr));
|
|
} else {
|
|
memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
|
|
sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
|
|
ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
|
|
{
|
|
struct ufs_inode_info *ufsi;
|
|
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
|
struct buffer_head * bh;
|
|
struct inode *inode;
|
|
int err;
|
|
|
|
UFSD("ENTER, ino %lu\n", ino);
|
|
|
|
if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
|
|
ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
|
|
ino);
|
|
return ERR_PTR(-EIO);
|
|
}
|
|
|
|
inode = iget_locked(sb, ino);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
if (!(inode->i_state & I_NEW))
|
|
return inode;
|
|
|
|
ufsi = UFS_I(inode);
|
|
|
|
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);
|
|
goto bad_inode;
|
|
}
|
|
if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
|
|
struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
|
|
|
|
err = ufs2_read_inode(inode,
|
|
ufs2_inode + ufs_inotofsbo(inode->i_ino));
|
|
} else {
|
|
struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
|
|
|
|
err = ufs1_read_inode(inode,
|
|
ufs_inode + ufs_inotofsbo(inode->i_ino));
|
|
}
|
|
|
|
if (err)
|
|
goto bad_inode;
|
|
inode->i_version++;
|
|
ufsi->i_lastfrag =
|
|
(inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
|
|
ufsi->i_dir_start_lookup = 0;
|
|
ufsi->i_osync = 0;
|
|
|
|
ufs_set_inode_ops(inode);
|
|
|
|
brelse(bh);
|
|
|
|
UFSD("EXIT\n");
|
|
unlock_new_inode(inode);
|
|
return inode;
|
|
|
|
bad_inode:
|
|
iget_failed(inode);
|
|
return ERR_PTR(-EIO);
|
|
}
|
|
|
|
static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_inode_info *ufsi = UFS_I(inode);
|
|
|
|
ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
|
|
ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
|
|
|
|
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;
|
|
ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
|
|
ufs_inode->ui_ctime.tv_usec = 0;
|
|
ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
|
|
ufs_inode->ui_mtime.tv_usec = 0;
|
|
ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
|
|
ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
|
|
ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
|
|
|
|
if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
|
|
ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
|
|
ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
|
|
}
|
|
|
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
|
|
/* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
|
|
ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
|
|
} else if (inode->i_blocks) {
|
|
memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
|
|
sizeof(ufs_inode->ui_u2.ui_addr));
|
|
}
|
|
else {
|
|
memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
|
|
sizeof(ufs_inode->ui_u2.ui_symlink));
|
|
}
|
|
|
|
if (!inode->i_nlink)
|
|
memset (ufs_inode, 0, sizeof(struct ufs_inode));
|
|
}
|
|
|
|
static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_inode_info *ufsi = UFS_I(inode);
|
|
|
|
UFSD("ENTER\n");
|
|
ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
|
|
ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
|
|
|
|
ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
|
|
ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
|
|
|
|
ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
|
|
ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
|
|
ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
|
|
ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
|
|
ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
|
|
ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
|
|
ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
|
|
|
|
ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
|
|
ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
|
|
ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
|
|
|
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
|
|
/* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
|
|
ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
|
|
} else if (inode->i_blocks) {
|
|
memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
|
|
sizeof(ufs_inode->ui_u2.ui_addr));
|
|
} else {
|
|
memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
|
|
sizeof(ufs_inode->ui_u2.ui_symlink));
|
|
}
|
|
|
|
if (!inode->i_nlink)
|
|
memset (ufs_inode, 0, sizeof(struct ufs2_inode));
|
|
UFSD("EXIT\n");
|
|
}
|
|
|
|
static int ufs_update_inode(struct inode * inode, int do_sync)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
|
struct buffer_head * bh;
|
|
|
|
UFSD("ENTER, ino %lu\n", inode->i_ino);
|
|
|
|
if (inode->i_ino < UFS_ROOTINO ||
|
|
inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
|
|
ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
|
|
return -1;
|
|
}
|
|
|
|
bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
|
|
if (!bh) {
|
|
ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
|
|
return -1;
|
|
}
|
|
if (uspi->fs_magic == UFS2_MAGIC) {
|
|
struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
|
|
|
|
ufs2_update_inode(inode,
|
|
ufs2_inode + ufs_inotofsbo(inode->i_ino));
|
|
} else {
|
|
struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
|
|
|
|
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)
|
|
{
|
|
return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
|
|
}
|
|
|
|
int ufs_sync_inode (struct inode *inode)
|
|
{
|
|
return ufs_update_inode (inode, 1);
|
|
}
|
|
|
|
void ufs_evict_inode(struct inode * inode)
|
|
{
|
|
int want_delete = 0;
|
|
|
|
if (!inode->i_nlink && !is_bad_inode(inode))
|
|
want_delete = 1;
|
|
|
|
truncate_inode_pages_final(&inode->i_data);
|
|
if (want_delete) {
|
|
inode->i_size = 0;
|
|
if (inode->i_blocks)
|
|
ufs_truncate_blocks(inode);
|
|
}
|
|
|
|
invalidate_inode_buffers(inode);
|
|
clear_inode(inode);
|
|
|
|
if (want_delete)
|
|
ufs_free_inode(inode);
|
|
}
|
|
|
|
struct to_free {
|
|
struct inode *inode;
|
|
u64 to;
|
|
unsigned count;
|
|
};
|
|
|
|
static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
|
|
{
|
|
if (ctx->count && ctx->to != from) {
|
|
ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
|
|
ctx->count = 0;
|
|
}
|
|
ctx->count += count;
|
|
ctx->to = from + count;
|
|
}
|
|
|
|
#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;
|
|
struct to_free ctx = {.inode = inode};
|
|
unsigned i, tmp;
|
|
|
|
UFSD("ENTER: ino %lu\n", inode->i_ino);
|
|
|
|
sb = inode->i_sb;
|
|
uspi = UFS_SB(sb)->s_uspi;
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
free_data(&ctx, tmp, uspi->s_fpb);
|
|
mark_inode_dirty(inode);
|
|
}
|
|
|
|
free_data(&ctx, 0, 0);
|
|
|
|
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 free_full_branch(struct inode *inode, int depth, void *p)
|
|
{
|
|
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 *ubh;
|
|
u64 tmp;
|
|
unsigned i;
|
|
|
|
tmp = ufs_data_ptr_to_cpu(sb, p);
|
|
if (!tmp)
|
|
return;
|
|
ubh = ubh_bread (sb, tmp, uspi->s_bsize);
|
|
if (!ubh) {
|
|
write_seqlock(&ufsi->meta_lock);
|
|
ufs_data_ptr_clear(uspi, p);
|
|
write_sequnlock(&ufsi->meta_lock);
|
|
return;
|
|
}
|
|
|
|
if (--depth) {
|
|
for (i = 0 ; i < uspi->s_apb ; i++) {
|
|
void *ind = ubh_get_data_ptr(uspi, ubh, i);
|
|
free_full_branch(inode, depth, ind);
|
|
ubh_mark_buffer_dirty(ubh);
|
|
}
|
|
} else {
|
|
struct to_free ctx = {.inode = inode};
|
|
|
|
for (i = 0; i < uspi->s_apb; i++) {
|
|
void *ind = ubh_get_data_ptr(uspi, 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(ubh);
|
|
free_data(&ctx, tmp, uspi->s_fpb);
|
|
mark_inode_dirty(inode);
|
|
}
|
|
free_data(&ctx, 0, 0);
|
|
}
|
|
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(ubh);
|
|
ufs_free_blocks(inode, tmp, uspi->s_fpb);
|
|
mark_inode_dirty(inode);
|
|
}
|
|
|
|
static void ufs_trunc_branch(struct inode *inode, unsigned *offsets, int depth2, int depth, void *p)
|
|
{
|
|
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 *ubh;
|
|
u64 tmp;
|
|
unsigned from = *offsets++;
|
|
unsigned i;
|
|
|
|
tmp = ufs_data_ptr_to_cpu(sb, p);
|
|
if (!tmp)
|
|
return;
|
|
ubh = ubh_bread (sb, tmp, uspi->s_bsize);
|
|
if (!ubh) {
|
|
write_seqlock(&ufsi->meta_lock);
|
|
ufs_data_ptr_clear(uspi, p);
|
|
write_sequnlock(&ufsi->meta_lock);
|
|
return;
|
|
}
|
|
|
|
if (--depth2) {
|
|
void *ind = ubh_get_data_ptr(uspi, ubh, from++);
|
|
ufs_trunc_branch(inode, offsets, depth2, depth - 1, ind);
|
|
ubh_mark_buffer_dirty(ubh);
|
|
}
|
|
if (--depth) {
|
|
for (i = from ; i < uspi->s_apb ; i++) {
|
|
void *ind = ubh_get_data_ptr(uspi, ubh, i);
|
|
free_full_branch(inode, depth, ind);
|
|
ubh_mark_buffer_dirty(ubh);
|
|
}
|
|
} else {
|
|
struct to_free ctx = {.inode = inode};
|
|
|
|
for (i = from; i < uspi->s_apb; i++) {
|
|
void *ind = ubh_get_data_ptr(uspi, 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(ubh);
|
|
free_data(&ctx, tmp, uspi->s_fpb);
|
|
mark_inode_dirty(inode);
|
|
}
|
|
free_data(&ctx, 0, 0);
|
|
}
|
|
if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
|
|
ubh_sync_block(ubh);
|
|
ubh_brelse(ubh);
|
|
}
|
|
|
|
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);
|
|
int depth2;
|
|
unsigned i;
|
|
|
|
if (!depth)
|
|
return;
|
|
|
|
/* find the last non-zero in offsets[] */
|
|
for (depth2 = depth - 1; depth2; depth2--)
|
|
if (offsets[depth2])
|
|
break;
|
|
|
|
mutex_lock(&ufsi->truncate_mutex);
|
|
if (depth == 1) {
|
|
ufs_trunc_direct(inode);
|
|
offsets[0] = UFS_IND_BLOCK;
|
|
} else {
|
|
if (depth2)
|
|
ufs_trunc_branch(inode, offsets + 1, depth2, depth - 1,
|
|
ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++));
|
|
}
|
|
for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
|
|
free_full_branch(inode, i - UFS_IND_BLOCK + 1,
|
|
ufs_get_direct_data_ptr(uspi, ufsi, i));
|
|
}
|
|
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,
|
|
};
|