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1238 lines
33 KiB
1238 lines
33 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
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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 <[email protected]> |
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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 ([email protected]) |
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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 ([email protected]), 1993 |
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* Big-endian to little-endian byte-swapping/bitmaps by |
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* David S. Miller ([email protected]), 1995 |
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*/ |
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|
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#include <linux/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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#include <linux/iversion.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, |
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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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/* |
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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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|
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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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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; |
|
|
|
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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|
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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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|
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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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|
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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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|
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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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|
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lastfrag = ufsi->i_lastfrag; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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; |
|
void *p; |
|
|
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if (!ind_block) |
|
return 0; |
|
|
|
bh = sb_bread(sb, ind_block + (index >> shift)); |
|
if (unlikely(!bh)) { |
|
*err = -EIO; |
|
return 0; |
|
} |
|
|
|
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); |
|
if (tmp) |
|
goto out; |
|
|
|
if (index && (uspi->fs_magic == UFS2_MAGIC ? |
|
(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; |
|
tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, |
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uspi->s_fpb, err, locked_page); |
|
if (!tmp) |
|
goto out; |
|
|
|
if (new) |
|
*new = 1; |
|
|
|
mark_buffer_dirty(bh); |
|
if (IS_SYNC(inode)) |
|
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); |
|
UFSD("EXIT\n"); |
|
if (tmp) |
|
tmp += uspi->s_sbbase; |
|
return tmp; |
|
} |
|
|
|
/** |
|
* ufs_getfrag_block() - `get_block_t' function, interface between UFS and |
|
* readpage, writepage and so on |
|
*/ |
|
|
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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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{ |
|
struct super_block *sb = inode->i_sb; |
|
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; |
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int err = 0, new = 0; |
|
unsigned offsets[4]; |
|
int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); |
|
u64 phys64 = 0; |
|
unsigned frag = fragment & uspi->s_fpbmask; |
|
|
|
phys64 = ufs_frag_map(inode, offsets, depth); |
|
if (!create) |
|
goto done; |
|
|
|
if (phys64) { |
|
if (fragment >= UFS_NDIR_FRAGMENT) |
|
goto done; |
|
read_seqlock_excl(&UFS_I(inode)->meta_lock); |
|
if (fragment < UFS_I(inode)->i_lastfrag) { |
|
read_sequnlock_excl(&UFS_I(inode)->meta_lock); |
|
goto done; |
|
} |
|
read_sequnlock_excl(&UFS_I(inode)->meta_lock); |
|
} |
|
/* This code entered only while writing ....? */ |
|
|
|
mutex_lock(&UFS_I(inode)->truncate_mutex); |
|
|
|
UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); |
|
if (unlikely(!depth)) { |
|
ufs_warning(sb, "ufs_get_block", "block > big"); |
|
err = -EIO; |
|
goto out; |
|
} |
|
|
|
if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) { |
|
unsigned lastfrag = UFS_I(inode)->i_lastfrag; |
|
unsigned tailfrags = lastfrag & uspi->s_fpbmask; |
|
if (tailfrags && fragment >= lastfrag) { |
|
if (!ufs_extend_tail(inode, fragment, |
|
&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], |
|
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 user_namespace *mnt_userns, struct dentry *dentry, |
|
struct iattr *attr) |
|
{ |
|
struct inode *inode = d_inode(dentry); |
|
unsigned int ia_valid = attr->ia_valid; |
|
int error; |
|
|
|
error = setattr_prepare(&init_user_ns, 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(&init_user_ns, inode, attr); |
|
mark_inode_dirty(inode); |
|
return 0; |
|
} |
|
|
|
const struct inode_operations ufs_file_inode_operations = { |
|
.setattr = ufs_setattr, |
|
};
|
|
|