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09cbfeaf1a
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time ago with promise that one day it will be possible to implement page cache with bigger chunks than PAGE_SIZE. This promise never materialized. And unlikely will. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); This patch contains automated changes generated with coccinelle using script below. For some reason, coccinelle doesn't patch header files. I've called spatch for them manually. The only adjustment after coccinelle is revert of changes to PAGE_CAHCE_ALIGN definition: we are going to drop it later. There are few places in the code where coccinelle didn't reach. I'll fix them manually in a separate patch. Comments and documentation also will be addressed with the separate patch. virtual patch @@ expression E; @@ - E << (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ expression E; @@ - E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ @@ - PAGE_CACHE_SHIFT + PAGE_SHIFT @@ @@ - PAGE_CACHE_SIZE + PAGE_SIZE @@ @@ - PAGE_CACHE_MASK + PAGE_MASK @@ expression E; @@ - PAGE_CACHE_ALIGN(E) + PAGE_ALIGN(E) @@ expression E; @@ - page_cache_get(E) + get_page(E) @@ expression E; @@ - page_cache_release(E) + put_page(E) Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1229 lines
33 KiB
C
1229 lines
33 KiB
C
/*
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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 <asm/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 "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, err, 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, uspi->s_fpb, 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_SEC;
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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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|
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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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|
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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;
|
|
|
|
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_SEC;
|
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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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}
|
|
|
|
/**
|
|
* ufs_getfrag_block() - `get_block_t' function, interface between UFS and
|
|
* readpage, writepage and so on
|
|
*/
|
|
|
|
static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
|
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;
|
|
|
|
if (!create) {
|
|
phys64 = ufs_frag_map(inode, offsets, depth);
|
|
goto out;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
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) {
|
|
ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Linux now has 32-bit uid and gid, so we can support EFT.
|
|
*/
|
|
i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode));
|
|
i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode));
|
|
|
|
inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
|
|
inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
|
|
inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
|
|
inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
|
|
inode->i_mtime.tv_nsec = 0;
|
|
inode->i_atime.tv_nsec = 0;
|
|
inode->i_ctime.tv_nsec = 0;
|
|
inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
|
|
inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
|
|
ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
|
|
ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
|
|
ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
|
|
|
|
|
|
if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
|
|
memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
|
|
sizeof(ufs_inode->ui_u2.ui_addr));
|
|
} else {
|
|
memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
|
|
sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
|
|
ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
|
|
{
|
|
struct ufs_inode_info *ufsi = UFS_I(inode);
|
|
struct super_block *sb = inode->i_sb;
|
|
umode_t mode;
|
|
|
|
UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
|
|
/*
|
|
* Copy data to the in-core inode.
|
|
*/
|
|
inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
|
|
set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
|
|
if (inode->i_nlink == 0) {
|
|
ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Linux now has 32-bit uid and gid, so we can support EFT.
|
|
*/
|
|
i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid));
|
|
i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid));
|
|
|
|
inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
|
|
inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
|
|
inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
|
|
inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
|
|
inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
|
|
inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
|
|
inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
|
|
inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
|
|
inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
|
|
ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
|
|
/*
|
|
ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
|
|
ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
|
|
*/
|
|
|
|
if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
|
|
memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
|
|
sizeof(ufs2_inode->ui_u2.ui_addr));
|
|
} else {
|
|
memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
|
|
sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
|
|
ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
|
|
{
|
|
struct ufs_inode_info *ufsi;
|
|
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
|
struct buffer_head * bh;
|
|
struct inode *inode;
|
|
int err;
|
|
|
|
UFSD("ENTER, ino %lu\n", ino);
|
|
|
|
if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
|
|
ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
|
|
ino);
|
|
return ERR_PTR(-EIO);
|
|
}
|
|
|
|
inode = iget_locked(sb, ino);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
if (!(inode->i_state & I_NEW))
|
|
return inode;
|
|
|
|
ufsi = UFS_I(inode);
|
|
|
|
bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
|
|
if (!bh) {
|
|
ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
|
|
inode->i_ino);
|
|
goto bad_inode;
|
|
}
|
|
if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
|
|
struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
|
|
|
|
err = ufs2_read_inode(inode,
|
|
ufs2_inode + ufs_inotofsbo(inode->i_ino));
|
|
} else {
|
|
struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
|
|
|
|
err = ufs1_read_inode(inode,
|
|
ufs_inode + ufs_inotofsbo(inode->i_ino));
|
|
}
|
|
|
|
if (err)
|
|
goto bad_inode;
|
|
inode->i_version++;
|
|
ufsi->i_lastfrag =
|
|
(inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
|
|
ufsi->i_dir_start_lookup = 0;
|
|
ufsi->i_osync = 0;
|
|
|
|
ufs_set_inode_ops(inode);
|
|
|
|
brelse(bh);
|
|
|
|
UFSD("EXIT\n");
|
|
unlock_new_inode(inode);
|
|
return inode;
|
|
|
|
bad_inode:
|
|
iget_failed(inode);
|
|
return ERR_PTR(-EIO);
|
|
}
|
|
|
|
static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_inode_info *ufsi = UFS_I(inode);
|
|
|
|
ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
|
|
ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
|
|
|
|
ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode));
|
|
ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode));
|
|
|
|
ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
|
|
ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
|
|
ufs_inode->ui_atime.tv_usec = 0;
|
|
ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
|
|
ufs_inode->ui_ctime.tv_usec = 0;
|
|
ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
|
|
ufs_inode->ui_mtime.tv_usec = 0;
|
|
ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
|
|
ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
|
|
ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
|
|
|
|
if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
|
|
ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
|
|
ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
|
|
}
|
|
|
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
|
|
/* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
|
|
ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
|
|
} else if (inode->i_blocks) {
|
|
memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
|
|
sizeof(ufs_inode->ui_u2.ui_addr));
|
|
}
|
|
else {
|
|
memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
|
|
sizeof(ufs_inode->ui_u2.ui_symlink));
|
|
}
|
|
|
|
if (!inode->i_nlink)
|
|
memset (ufs_inode, 0, sizeof(struct ufs_inode));
|
|
}
|
|
|
|
static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_inode_info *ufsi = UFS_I(inode);
|
|
|
|
UFSD("ENTER\n");
|
|
ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
|
|
ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
|
|
|
|
ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode));
|
|
ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode));
|
|
|
|
ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
|
|
ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
|
|
ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
|
|
ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
|
|
ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
|
|
ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
|
|
ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
|
|
|
|
ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
|
|
ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
|
|
ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
|
|
|
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
|
|
/* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
|
|
ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
|
|
} else if (inode->i_blocks) {
|
|
memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
|
|
sizeof(ufs_inode->ui_u2.ui_addr));
|
|
} else {
|
|
memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
|
|
sizeof(ufs_inode->ui_u2.ui_symlink));
|
|
}
|
|
|
|
if (!inode->i_nlink)
|
|
memset (ufs_inode, 0, sizeof(struct ufs2_inode));
|
|
UFSD("EXIT\n");
|
|
}
|
|
|
|
static int ufs_update_inode(struct inode * inode, int do_sync)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
|
struct buffer_head * bh;
|
|
|
|
UFSD("ENTER, ino %lu\n", inode->i_ino);
|
|
|
|
if (inode->i_ino < UFS_ROOTINO ||
|
|
inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
|
|
ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
|
|
return -1;
|
|
}
|
|
|
|
bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
|
|
if (!bh) {
|
|
ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
|
|
return -1;
|
|
}
|
|
if (uspi->fs_magic == UFS2_MAGIC) {
|
|
struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
|
|
|
|
ufs2_update_inode(inode,
|
|
ufs2_inode + ufs_inotofsbo(inode->i_ino));
|
|
} else {
|
|
struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
|
|
|
|
ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
|
|
}
|
|
|
|
mark_buffer_dirty(bh);
|
|
if (do_sync)
|
|
sync_dirty_buffer(bh);
|
|
brelse (bh);
|
|
|
|
UFSD("EXIT\n");
|
|
return 0;
|
|
}
|
|
|
|
int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
|
|
{
|
|
return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
|
|
}
|
|
|
|
int ufs_sync_inode (struct inode *inode)
|
|
{
|
|
return ufs_update_inode (inode, 1);
|
|
}
|
|
|
|
void ufs_evict_inode(struct inode * inode)
|
|
{
|
|
int want_delete = 0;
|
|
|
|
if (!inode->i_nlink && !is_bad_inode(inode))
|
|
want_delete = 1;
|
|
|
|
truncate_inode_pages_final(&inode->i_data);
|
|
if (want_delete) {
|
|
inode->i_size = 0;
|
|
if (inode->i_blocks)
|
|
ufs_truncate_blocks(inode);
|
|
}
|
|
|
|
invalidate_inode_buffers(inode);
|
|
clear_inode(inode);
|
|
|
|
if (want_delete)
|
|
ufs_free_inode(inode);
|
|
}
|
|
|
|
struct to_free {
|
|
struct inode *inode;
|
|
u64 to;
|
|
unsigned count;
|
|
};
|
|
|
|
static inline void free_data(struct to_free *ctx, u64 from, unsigned count)
|
|
{
|
|
if (ctx->count && ctx->to != from) {
|
|
ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count);
|
|
ctx->count = 0;
|
|
}
|
|
ctx->count += count;
|
|
ctx->to = from + count;
|
|
}
|
|
|
|
#define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift)
|
|
#define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift)
|
|
|
|
static void ufs_trunc_direct(struct inode *inode)
|
|
{
|
|
struct ufs_inode_info *ufsi = UFS_I(inode);
|
|
struct super_block * sb;
|
|
struct ufs_sb_private_info * uspi;
|
|
void *p;
|
|
u64 frag1, frag2, frag3, frag4, block1, block2;
|
|
struct to_free ctx = {.inode = inode};
|
|
unsigned i, tmp;
|
|
|
|
UFSD("ENTER: ino %lu\n", inode->i_ino);
|
|
|
|
sb = inode->i_sb;
|
|
uspi = UFS_SB(sb)->s_uspi;
|
|
|
|
frag1 = DIRECT_FRAGMENT;
|
|
frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
|
|
frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
|
|
frag3 = frag4 & ~uspi->s_fpbmask;
|
|
block1 = block2 = 0;
|
|
if (frag2 > frag3) {
|
|
frag2 = frag4;
|
|
frag3 = frag4 = 0;
|
|
} else if (frag2 < frag3) {
|
|
block1 = ufs_fragstoblks (frag2);
|
|
block2 = ufs_fragstoblks (frag3);
|
|
}
|
|
|
|
UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
|
|
" frag3 %llu, frag4 %llu\n", inode->i_ino,
|
|
(unsigned long long)frag1, (unsigned long long)frag2,
|
|
(unsigned long long)block1, (unsigned long long)block2,
|
|
(unsigned long long)frag3, (unsigned long long)frag4);
|
|
|
|
if (frag1 >= frag2)
|
|
goto next1;
|
|
|
|
/*
|
|
* Free first free fragments
|
|
*/
|
|
p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
|
|
tmp = ufs_data_ptr_to_cpu(sb, p);
|
|
if (!tmp )
|
|
ufs_panic (sb, "ufs_trunc_direct", "internal error");
|
|
frag2 -= frag1;
|
|
frag1 = ufs_fragnum (frag1);
|
|
|
|
ufs_free_fragments(inode, tmp + frag1, frag2);
|
|
|
|
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);
|
|
unmap_underlying_metadata(bh->b_bdev,
|
|
bh->b_blocknr);
|
|
/*
|
|
* we do not zeroize fragment, because of
|
|
* if it maped to hole, it already contains zeroes
|
|
*/
|
|
set_buffer_uptodate(bh);
|
|
mark_buffer_dirty(bh);
|
|
set_page_dirty(lastpage);
|
|
}
|
|
|
|
if (lastfrag >= UFS_IND_FRAGMENT) {
|
|
end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
|
|
phys64 = bh->b_blocknr + 1;
|
|
for (i = 0; i < end; ++i) {
|
|
bh = sb_getblk(sb, i + phys64);
|
|
lock_buffer(bh);
|
|
memset(bh->b_data, 0, sb->s_blocksize);
|
|
set_buffer_uptodate(bh);
|
|
mark_buffer_dirty(bh);
|
|
unlock_buffer(bh);
|
|
sync_dirty_buffer(bh);
|
|
brelse(bh);
|
|
}
|
|
}
|
|
out_unlock:
|
|
ufs_put_locked_page(lastpage);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static void __ufs_truncate_blocks(struct inode *inode)
|
|
{
|
|
struct ufs_inode_info *ufsi = UFS_I(inode);
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
|
|
unsigned offsets[4];
|
|
int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets);
|
|
int depth2;
|
|
unsigned i;
|
|
struct ufs_buffer_head *ubh[3];
|
|
void *p;
|
|
u64 block;
|
|
|
|
if (!depth)
|
|
return;
|
|
|
|
/* find the last non-zero in offsets[] */
|
|
for (depth2 = depth - 1; depth2; depth2--)
|
|
if (offsets[depth2])
|
|
break;
|
|
|
|
mutex_lock(&ufsi->truncate_mutex);
|
|
if (depth == 1) {
|
|
ufs_trunc_direct(inode);
|
|
offsets[0] = UFS_IND_BLOCK;
|
|
} else {
|
|
/* get the blocks that should be partially emptied */
|
|
p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]);
|
|
for (i = 0; i < depth2; i++) {
|
|
offsets[i]++; /* next branch is fully freed */
|
|
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);
|
|
}
|
|
}
|
|
ufsi->i_lastfrag = DIRECT_FRAGMENT;
|
|
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_SEC;
|
|
mark_inode_dirty(inode);
|
|
out:
|
|
UFSD("EXIT: err %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
void ufs_truncate_blocks(struct inode *inode)
|
|
{
|
|
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
|
|
S_ISLNK(inode->i_mode)))
|
|
return;
|
|
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
|
|
return;
|
|
__ufs_truncate_blocks(inode);
|
|
}
|
|
|
|
int ufs_setattr(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
unsigned int ia_valid = attr->ia_valid;
|
|
int error;
|
|
|
|
error = inode_change_ok(inode, attr);
|
|
if (error)
|
|
return error;
|
|
|
|
if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) {
|
|
error = ufs_truncate(inode, attr->ia_size);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
setattr_copy(inode, attr);
|
|
mark_inode_dirty(inode);
|
|
return 0;
|
|
}
|
|
|
|
const struct inode_operations ufs_file_inode_operations = {
|
|
.setattr = ufs_setattr,
|
|
};
|