mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
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bb8c2d66bc
Signed-off-by: Jeff Layton <jlayton@redhat.com>
1238 lines
33 KiB
C
1238 lines
33 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/ufs/inode.c
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*
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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
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*
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* from
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*
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* linux/fs/ext2/inode.c
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* from
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*
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* linux/fs/minix/inode.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* 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 <linux/uaccess.h>
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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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#include <linux/iversion.h>
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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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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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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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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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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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static inline int grow_chain64(struct ufs_inode_info *ufsi,
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struct buffer_head *bh, __fs64 *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->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, unsigned offsets[4], int depth)
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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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Indirect chain[4], *q = chain;
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unsigned *p;
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unsigned flags = UFS_SB(sb)->s_flags;
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u64 res = 0;
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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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if (depth == 0)
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goto no_block;
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again:
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p = offsets;
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if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
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goto ufs2;
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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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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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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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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:
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res += uspi->s_sbbase;
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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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* Unpacking tails: we have a file with partial final block and
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* we had been asked to extend it. If the fragment being written
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* is within the same block, we need to extend the tail just to cover
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* that fragment. Otherwise the tail is extended to full block.
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*
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* Note that we might need to create a _new_ tail, but that will
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* be handled elsewhere; this is strictly for resizing old
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* ones.
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*/
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static bool
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ufs_extend_tail(struct inode *inode, u64 writes_to,
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int *err, 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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unsigned lastfrag = ufsi->i_lastfrag; /* it's a short file, so unsigned is enough */
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unsigned block = ufs_fragstoblks(lastfrag);
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unsigned new_size;
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void *p;
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u64 tmp;
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if (writes_to < (lastfrag | uspi->s_fpbmask))
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new_size = (writes_to & uspi->s_fpbmask) + 1;
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else
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new_size = uspi->s_fpb;
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p = ufs_get_direct_data_ptr(uspi, ufsi, block);
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tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
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new_size - (lastfrag & uspi->s_fpbmask), err,
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locked_page);
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return tmp != 0;
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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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* @index: number of block pointer within the inode's array.
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* @new_fragment: number of new allocated fragment(s)
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* @err: we set it if something wrong
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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 u64
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ufs_inode_getfrag(struct inode *inode, unsigned index,
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sector_t new_fragment, int *err,
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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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u64 tmp, goal, lastfrag;
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unsigned nfrags = uspi->s_fpb;
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void *p;
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/* 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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p = ufs_get_direct_data_ptr(uspi, ufsi, index);
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tmp = ufs_data_ptr_to_cpu(sb, p);
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if (tmp)
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goto out;
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lastfrag = ufsi->i_lastfrag;
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/* will that be a new tail? */
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if (new_fragment < UFS_NDIR_FRAGMENT && new_fragment >= lastfrag)
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nfrags = (new_fragment & uspi->s_fpbmask) + 1;
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goal = 0;
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if (index) {
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goal = ufs_data_ptr_to_cpu(sb,
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ufs_get_direct_data_ptr(uspi, ufsi, index - 1));
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if (goal)
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goal += uspi->s_fpb;
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}
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tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
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goal, nfrags, err, locked_page);
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if (!tmp) {
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*err = -ENOSPC;
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return 0;
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}
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if (new)
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*new = 1;
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inode->i_ctime = current_time(inode);
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if (IS_SYNC(inode))
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ufs_sync_inode (inode);
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mark_inode_dirty(inode);
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out:
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return tmp + uspi->s_sbbase;
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/* This part : To be implemented ....
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Required only for writing, not required for READ-ONLY.
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ufs2:
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u2_block = ufs_fragstoblks(fragment);
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u2_blockoff = ufs_fragnum(fragment);
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p = ufsi->i_u1.u2_i_data + block;
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goal = 0;
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repeat2:
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tmp = fs32_to_cpu(sb, *p);
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lastfrag = ufsi->i_lastfrag;
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*/
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}
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/**
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* ufs_inode_getblock() - allocate new block
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* @inode: pointer to inode
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* @ind_block: block number of the indirect block
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* @index: number of pointer within the indirect block
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* @new_fragment: number of new allocated fragment
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* (block will hold this fragment and also uspi->s_fpb-1)
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* @err: see ufs_inode_getfrag()
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* @new: see ufs_inode_getfrag()
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* @locked_page: see ufs_inode_getfrag()
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*/
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static u64
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ufs_inode_getblock(struct inode *inode, u64 ind_block,
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unsigned index, sector_t new_fragment, int *err,
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int *new, struct page *locked_page)
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{
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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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int shift = uspi->s_apbshift - uspi->s_fpbshift;
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u64 tmp = 0, goal;
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struct buffer_head *bh;
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void *p;
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if (!ind_block)
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return 0;
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bh = sb_bread(sb, ind_block + (index >> shift));
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if (unlikely(!bh)) {
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*err = -EIO;
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return 0;
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}
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index &= uspi->s_apbmask >> uspi->s_fpbshift;
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if (uspi->fs_magic == UFS2_MAGIC)
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p = (__fs64 *)bh->b_data + index;
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else
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p = (__fs32 *)bh->b_data + index;
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tmp = ufs_data_ptr_to_cpu(sb, p);
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if (tmp)
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goto out;
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if (index && (uspi->fs_magic == UFS2_MAGIC ?
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(tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) :
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(tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1]))))
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goal = tmp + uspi->s_fpb;
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else
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goal = bh->b_blocknr + uspi->s_fpb;
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tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
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uspi->s_fpb, err, locked_page);
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if (!tmp)
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goto out;
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|
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if (new)
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*new = 1;
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mark_buffer_dirty(bh);
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if (IS_SYNC(inode))
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sync_dirty_buffer(bh);
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inode->i_ctime = current_time(inode);
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mark_inode_dirty(inode);
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out:
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brelse (bh);
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UFSD("EXIT\n");
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if (tmp)
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tmp += uspi->s_sbbase;
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return tmp;
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}
|
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|
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/**
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* ufs_getfrag_block() - `get_block_t' function, interface between UFS and
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* readpage, writepage and so on
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*/
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|
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static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
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{
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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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int err = 0, new = 0;
|
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unsigned offsets[4];
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int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
|
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u64 phys64 = 0;
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unsigned frag = fragment & uspi->s_fpbmask;
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|
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phys64 = ufs_frag_map(inode, offsets, depth);
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if (!create)
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goto done;
|
|
|
|
if (phys64) {
|
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if (fragment >= UFS_NDIR_FRAGMENT)
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goto done;
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read_seqlock_excl(&UFS_I(inode)->meta_lock);
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if (fragment < UFS_I(inode)->i_lastfrag) {
|
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read_sequnlock_excl(&UFS_I(inode)->meta_lock);
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goto done;
|
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}
|
|
read_sequnlock_excl(&UFS_I(inode)->meta_lock);
|
|
}
|
|
/* This code entered only while writing ....? */
|
|
|
|
mutex_lock(&UFS_I(inode)->truncate_mutex);
|
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|
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UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
|
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if (unlikely(!depth)) {
|
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ufs_warning(sb, "ufs_get_block", "block > big");
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err = -EIO;
|
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goto out;
|
|
}
|
|
|
|
if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
|
|
unsigned lastfrag = UFS_I(inode)->i_lastfrag;
|
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unsigned tailfrags = lastfrag & uspi->s_fpbmask;
|
|
if (tailfrags && fragment >= lastfrag) {
|
|
if (!ufs_extend_tail(inode, fragment,
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&err, bh_result->b_page))
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (depth == 1) {
|
|
phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
|
|
&err, &new, bh_result->b_page);
|
|
} else {
|
|
int i;
|
|
phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
|
|
&err, NULL, NULL);
|
|
for (i = 1; i < depth - 1; i++)
|
|
phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
|
|
fragment, &err, NULL, NULL);
|
|
phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
|
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fragment, &err, &new, bh_result->b_page);
|
|
}
|
|
out:
|
|
if (phys64) {
|
|
phys64 += frag;
|
|
map_bh(bh_result, sb, phys64);
|
|
if (new)
|
|
set_buffer_new(bh_result);
|
|
}
|
|
mutex_unlock(&UFS_I(inode)->truncate_mutex);
|
|
return err;
|
|
|
|
done:
|
|
if (phys64)
|
|
map_bh(bh_result, sb, phys64 + frag);
|
|
return 0;
|
|
}
|
|
|
|
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_link = (char *)UFS_I(inode)->i_u1.i_symlink;
|
|
inode->i_op = &simple_symlink_inode_operations;
|
|
} else {
|
|
inode->i_mapping->a_ops = &ufs_aops;
|
|
inode->i_op = &page_symlink_inode_operations;
|
|
inode_nohighmem(inode);
|
|
}
|
|
} 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)
|
|
return -ESTALE;
|
|
|
|
/*
|
|
* 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 = (signed)fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
|
|
inode->i_ctime.tv_sec = (signed)fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
|
|
inode->i_mtime.tv_sec = (signed)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)
|
|
return -ESTALE;
|
|
|
|
/*
|
|
* 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 = -EIO;
|
|
|
|
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));
|
|
}
|
|
brelse(bh);
|
|
if (err)
|
|
goto bad_inode;
|
|
|
|
inode_inc_iversion(inode);
|
|
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);
|
|
|
|
UFSD("EXIT\n");
|
|
unlock_new_inode(inode);
|
|
return inode;
|
|
|
|
bad_inode:
|
|
iget_failed(inode);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
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 &&
|
|
(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
|
|
S_ISLNK(inode->i_mode)))
|
|
ufs_truncate_blocks(inode);
|
|
ufs_update_inode(inode, inode_needs_sync(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_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);
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
next3:
|
|
|
|
UFSD("EXIT: ino %lu\n", inode->i_ino);
|
|
}
|
|
|
|
static void free_full_branch(struct inode *inode, u64 ind_block, int depth)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
|
struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize);
|
|
unsigned i;
|
|
|
|
if (!ubh)
|
|
return;
|
|
|
|
if (--depth) {
|
|
for (i = 0; i < uspi->s_apb; i++) {
|
|
void *p = ubh_get_data_ptr(uspi, ubh, i);
|
|
u64 block = ufs_data_ptr_to_cpu(sb, p);
|
|
if (block)
|
|
free_full_branch(inode, block, depth);
|
|
}
|
|
} else {
|
|
struct to_free ctx = {.inode = inode};
|
|
|
|
for (i = 0; i < uspi->s_apb; i++) {
|
|
void *p = ubh_get_data_ptr(uspi, ubh, i);
|
|
u64 block = ufs_data_ptr_to_cpu(sb, p);
|
|
if (block)
|
|
free_data(&ctx, block, uspi->s_fpb);
|
|
}
|
|
free_data(&ctx, 0, 0);
|
|
}
|
|
|
|
ubh_bforget(ubh);
|
|
ufs_free_blocks(inode, ind_block, uspi->s_fpb);
|
|
}
|
|
|
|
static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
|
unsigned i;
|
|
|
|
if (--depth) {
|
|
for (i = from; i < uspi->s_apb ; i++) {
|
|
void *p = ubh_get_data_ptr(uspi, ubh, i);
|
|
u64 block = ufs_data_ptr_to_cpu(sb, p);
|
|
if (block) {
|
|
write_seqlock(&UFS_I(inode)->meta_lock);
|
|
ufs_data_ptr_clear(uspi, p);
|
|
write_sequnlock(&UFS_I(inode)->meta_lock);
|
|
ubh_mark_buffer_dirty(ubh);
|
|
free_full_branch(inode, block, depth);
|
|
}
|
|
}
|
|
} else {
|
|
struct to_free ctx = {.inode = inode};
|
|
|
|
for (i = from; i < uspi->s_apb; i++) {
|
|
void *p = ubh_get_data_ptr(uspi, ubh, i);
|
|
u64 block = ufs_data_ptr_to_cpu(sb, p);
|
|
if (block) {
|
|
write_seqlock(&UFS_I(inode)->meta_lock);
|
|
ufs_data_ptr_clear(uspi, p);
|
|
write_sequnlock(&UFS_I(inode)->meta_lock);
|
|
ubh_mark_buffer_dirty(ubh);
|
|
free_data(&ctx, block, uspi->s_fpb);
|
|
}
|
|
}
|
|
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_SHIFT - inode->i_blkbits));
|
|
if (IS_ERR(lastpage)) {
|
|
err = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
end = lastfrag & ((1 << (PAGE_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);
|
|
clean_bdev_bh_alias(bh);
|
|
/*
|
|
* 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;
|
|
int depth2;
|
|
unsigned i;
|
|
struct ufs_buffer_head *ubh[3];
|
|
void *p;
|
|
u64 block;
|
|
|
|
if (inode->i_size) {
|
|
sector_t last = (inode->i_size - 1) >> uspi->s_bshift;
|
|
depth = ufs_block_to_path(inode, last, offsets);
|
|
if (!depth)
|
|
return;
|
|
} else {
|
|
depth = 1;
|
|
}
|
|
|
|
for (depth2 = depth - 1; depth2; depth2--)
|
|
if (offsets[depth2] != uspi->s_apb - 1)
|
|
break;
|
|
|
|
mutex_lock(&ufsi->truncate_mutex);
|
|
if (depth == 1) {
|
|
ufs_trunc_direct(inode);
|
|
offsets[0] = UFS_IND_BLOCK;
|
|
} else {
|
|
/* get the blocks that should be partially emptied */
|
|
p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++);
|
|
for (i = 0; i < depth2; i++) {
|
|
block = ufs_data_ptr_to_cpu(sb, p);
|
|
if (!block)
|
|
break;
|
|
ubh[i] = ubh_bread(sb, block, uspi->s_bsize);
|
|
if (!ubh[i]) {
|
|
write_seqlock(&ufsi->meta_lock);
|
|
ufs_data_ptr_clear(uspi, p);
|
|
write_sequnlock(&ufsi->meta_lock);
|
|
break;
|
|
}
|
|
p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]++);
|
|
}
|
|
while (i--)
|
|
free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1);
|
|
}
|
|
for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
|
|
p = ufs_get_direct_data_ptr(uspi, ufsi, i);
|
|
block = ufs_data_ptr_to_cpu(sb, p);
|
|
if (block) {
|
|
write_seqlock(&ufsi->meta_lock);
|
|
ufs_data_ptr_clear(uspi, p);
|
|
write_sequnlock(&ufsi->meta_lock);
|
|
free_full_branch(inode, block, i - UFS_IND_BLOCK + 1);
|
|
}
|
|
}
|
|
read_seqlock_excl(&ufsi->meta_lock);
|
|
ufsi->i_lastfrag = DIRECT_FRAGMENT;
|
|
read_sequnlock_excl(&ufsi->meta_lock);
|
|
mark_inode_dirty(inode);
|
|
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(inode);
|
|
mark_inode_dirty(inode);
|
|
out:
|
|
UFSD("EXIT: err %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
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 = setattr_prepare(dentry, 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,
|
|
};
|