^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/fs/affs/file.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * (c) 1996 Hans-Joachim Widmaier - Rewritten
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * (C) 1992 Eric Youngdale Modified for ISO 9660 filesystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * (C) 1991 Linus Torvalds - minix filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * affs regular file handling primitives
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/uio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "affs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static struct buffer_head *affs_get_extblock_slow(struct inode *inode, u32 ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) affs_file_open(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) pr_debug("open(%lu,%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) atomic_inc(&AFFS_I(inode)->i_opencnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) affs_file_release(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) pr_debug("release(%lu, %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (atomic_dec_and_test(&AFFS_I(inode)->i_opencnt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (inode->i_size != AFFS_I(inode)->mmu_private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) affs_truncate(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) affs_free_prealloc(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) affs_grow_extcache(struct inode *inode, u32 lc_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u32 lc_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int i, j, key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (!AFFS_I(inode)->i_lc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) char *ptr = (char *)get_zeroed_page(GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (!ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) AFFS_I(inode)->i_lc = (u32 *)ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) AFFS_I(inode)->i_ac = (struct affs_ext_key *)(ptr + AFFS_CACHE_SIZE / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) lc_max = AFFS_LC_SIZE << AFFS_I(inode)->i_lc_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (AFFS_I(inode)->i_extcnt > lc_max) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) u32 lc_shift, lc_mask, tmp, off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* need to recalculate linear cache, start from old size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) lc_shift = AFFS_I(inode)->i_lc_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) tmp = (AFFS_I(inode)->i_extcnt / AFFS_LC_SIZE) >> lc_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) for (; tmp; tmp >>= 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) lc_shift++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) lc_mask = (1 << lc_shift) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /* fix idx and old size to new shift */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) lc_idx >>= (lc_shift - AFFS_I(inode)->i_lc_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) AFFS_I(inode)->i_lc_size >>= (lc_shift - AFFS_I(inode)->i_lc_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /* first shrink old cache to make more space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) off = 1 << (lc_shift - AFFS_I(inode)->i_lc_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) for (i = 1, j = off; j < AFFS_LC_SIZE; i++, j += off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) AFFS_I(inode)->i_ac[i] = AFFS_I(inode)->i_ac[j];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) AFFS_I(inode)->i_lc_shift = lc_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) AFFS_I(inode)->i_lc_mask = lc_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /* fill cache to the needed index */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) i = AFFS_I(inode)->i_lc_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) AFFS_I(inode)->i_lc_size = lc_idx + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) for (; i <= lc_idx; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (!i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) AFFS_I(inode)->i_lc[0] = inode->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) key = AFFS_I(inode)->i_lc[i - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) j = AFFS_I(inode)->i_lc_mask + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) // unlock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) for (; j > 0; j--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) bh = affs_bread(sb, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) key = be32_to_cpu(AFFS_TAIL(sb, bh)->extension);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) // lock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) AFFS_I(inode)->i_lc[i] = key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) // lock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) affs_alloc_extblock(struct inode *inode, struct buffer_head *bh, u32 ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct buffer_head *new_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) u32 blocknr, tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) blocknr = affs_alloc_block(inode, bh->b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (!blocknr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return ERR_PTR(-ENOSPC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) new_bh = affs_getzeroblk(sb, blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (!new_bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) affs_free_block(sb, blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) AFFS_HEAD(new_bh)->ptype = cpu_to_be32(T_LIST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) AFFS_HEAD(new_bh)->key = cpu_to_be32(blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) AFFS_TAIL(sb, new_bh)->stype = cpu_to_be32(ST_FILE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) AFFS_TAIL(sb, new_bh)->parent = cpu_to_be32(inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) affs_fix_checksum(sb, new_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) mark_buffer_dirty_inode(new_bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) tmp = be32_to_cpu(AFFS_TAIL(sb, bh)->extension);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) affs_warning(sb, "alloc_ext", "previous extension set (%x)", tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) AFFS_TAIL(sb, bh)->extension = cpu_to_be32(blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) affs_adjust_checksum(bh, blocknr - tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) mark_buffer_dirty_inode(bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) AFFS_I(inode)->i_extcnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return new_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static inline struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) affs_get_extblock(struct inode *inode, u32 ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) /* inline the simplest case: same extended block as last time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct buffer_head *bh = AFFS_I(inode)->i_ext_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (ext == AFFS_I(inode)->i_ext_last)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) get_bh(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /* we have to do more (not inlined) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) bh = affs_get_extblock_slow(inode, ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) affs_get_extblock_slow(struct inode *inode, u32 ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) u32 ext_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) u32 lc_idx, lc_off, ac_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) u32 tmp, idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (ext == AFFS_I(inode)->i_ext_last + 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /* read the next extended block from the current one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) bh = AFFS_I(inode)->i_ext_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) ext_key = be32_to_cpu(AFFS_TAIL(sb, bh)->extension);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (ext < AFFS_I(inode)->i_extcnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) goto read_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) BUG_ON(ext > AFFS_I(inode)->i_extcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) bh = affs_alloc_extblock(inode, bh, ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (IS_ERR(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) goto store_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (ext == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* we seek back to the file header block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) ext_key = inode->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) goto read_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (ext >= AFFS_I(inode)->i_extcnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct buffer_head *prev_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /* allocate a new extended block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) BUG_ON(ext > AFFS_I(inode)->i_extcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /* get previous extended block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) prev_bh = affs_get_extblock(inode, ext - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (IS_ERR(prev_bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return prev_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) bh = affs_alloc_extblock(inode, prev_bh, ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) affs_brelse(prev_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (IS_ERR(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) goto store_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) /* check if there is an extended cache and whether it's large enough */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) lc_idx = ext >> AFFS_I(inode)->i_lc_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) lc_off = ext & AFFS_I(inode)->i_lc_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (lc_idx >= AFFS_I(inode)->i_lc_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) err = affs_grow_extcache(inode, lc_idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /* every n'th key we find in the linear cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (!lc_off) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) ext_key = AFFS_I(inode)->i_lc[lc_idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) goto read_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) /* maybe it's still in the associative cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) ac_idx = (ext - lc_idx - 1) & AFFS_AC_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (AFFS_I(inode)->i_ac[ac_idx].ext == ext) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) ext_key = AFFS_I(inode)->i_ac[ac_idx].key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) goto read_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /* try to find one of the previous extended blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) tmp = ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) idx = ac_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) while (--tmp, --lc_off > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) idx = (idx - 1) & AFFS_AC_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (AFFS_I(inode)->i_ac[idx].ext == tmp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) ext_key = AFFS_I(inode)->i_ac[idx].key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) goto find_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /* fall back to the linear cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) ext_key = AFFS_I(inode)->i_lc[lc_idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) find_ext:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) /* read all extended blocks until we find the one we need */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) //unlock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) bh = affs_bread(sb, ext_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) goto err_bread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) ext_key = be32_to_cpu(AFFS_TAIL(sb, bh)->extension);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) tmp++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) } while (tmp < ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) //lock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /* store it in the associative cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) // recalculate ac_idx?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) AFFS_I(inode)->i_ac[ac_idx].ext = ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) AFFS_I(inode)->i_ac[ac_idx].key = ext_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) read_ext:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) /* finally read the right extended block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) //unlock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) bh = affs_bread(sb, ext_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) goto err_bread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) //lock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) store_ext:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) /* release old cached extended block and store the new one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) affs_brelse(AFFS_I(inode)->i_ext_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) AFFS_I(inode)->i_ext_last = ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) AFFS_I(inode)->i_ext_bh = bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) get_bh(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) err_bread:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) affs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_result, int create)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) struct buffer_head *ext_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) u32 ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) pr_debug("%s(%lu, %llu)\n", __func__, inode->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) (unsigned long long)block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) BUG_ON(block > (sector_t)0x7fffffffUL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) if (block >= AFFS_I(inode)->i_blkcnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (block > AFFS_I(inode)->i_blkcnt || !create)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) goto err_big;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) create = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) //lock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) affs_lock_ext(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) ext = (u32)block / AFFS_SB(sb)->s_hashsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) block -= ext * AFFS_SB(sb)->s_hashsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) ext_bh = affs_get_extblock(inode, ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (IS_ERR(ext_bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) goto err_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) map_bh(bh_result, sb, (sector_t)be32_to_cpu(AFFS_BLOCK(sb, ext_bh, block)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (create) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) u32 blocknr = affs_alloc_block(inode, ext_bh->b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (!blocknr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) goto err_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) set_buffer_new(bh_result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) AFFS_I(inode)->mmu_private += AFFS_SB(sb)->s_data_blksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) AFFS_I(inode)->i_blkcnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) /* store new block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (bh_result->b_blocknr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) affs_warning(sb, "get_block",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) "block already set (%llx)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) (unsigned long long)bh_result->b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) AFFS_BLOCK(sb, ext_bh, block) = cpu_to_be32(blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) AFFS_HEAD(ext_bh)->block_count = cpu_to_be32(block + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) affs_adjust_checksum(ext_bh, blocknr - bh_result->b_blocknr + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) bh_result->b_blocknr = blocknr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (!block) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) /* insert first block into header block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) u32 tmp = be32_to_cpu(AFFS_HEAD(ext_bh)->first_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) affs_warning(sb, "get_block", "first block already set (%d)", tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) AFFS_HEAD(ext_bh)->first_data = cpu_to_be32(blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) affs_adjust_checksum(ext_bh, blocknr - tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) affs_brelse(ext_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) //unlock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) affs_unlock_ext(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) err_big:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) affs_error(inode->i_sb, "get_block", "strange block request %llu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) (unsigned long long)block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) err_ext:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) // unlock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) affs_unlock_ext(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return PTR_ERR(ext_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) err_alloc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) brelse(ext_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) clear_buffer_mapped(bh_result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) bh_result->b_bdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) // unlock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) affs_unlock_ext(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) return -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static int affs_writepage(struct page *page, struct writeback_control *wbc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) return block_write_full_page(page, affs_get_block, wbc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) static int affs_readpage(struct file *file, struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) return block_read_full_page(page, affs_get_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) static void affs_write_failed(struct address_space *mapping, loff_t to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) struct inode *inode = mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (to > inode->i_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) truncate_pagecache(inode, inode->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) affs_truncate(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) affs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) struct file *file = iocb->ki_filp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) struct address_space *mapping = file->f_mapping;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct inode *inode = mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) size_t count = iov_iter_count(iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) loff_t offset = iocb->ki_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) ssize_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (iov_iter_rw(iter) == WRITE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) loff_t size = offset + count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (AFFS_I(inode)->mmu_private < size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) ret = blockdev_direct_IO(iocb, inode, iter, affs_get_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (ret < 0 && iov_iter_rw(iter) == WRITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) affs_write_failed(mapping, offset + count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) static int affs_write_begin(struct file *file, struct address_space *mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) loff_t pos, unsigned len, unsigned flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) struct page **pagep, void **fsdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) *pagep = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) affs_get_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) &AFFS_I(mapping->host)->mmu_private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) affs_write_failed(mapping, pos + len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) static int affs_write_end(struct file *file, struct address_space *mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) loff_t pos, unsigned int len, unsigned int copied,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) struct page *page, void *fsdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) struct inode *inode = mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) /* Clear Archived bit on file writes, as AmigaOS would do */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) if (AFFS_I(inode)->i_protect & FIBF_ARCHIVED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) AFFS_I(inode)->i_protect &= ~FIBF_ARCHIVED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) static sector_t _affs_bmap(struct address_space *mapping, sector_t block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) return generic_block_bmap(mapping,block,affs_get_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) const struct address_space_operations affs_aops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) .readpage = affs_readpage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) .writepage = affs_writepage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) .write_begin = affs_write_begin,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) .write_end = affs_write_end,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) .direct_IO = affs_direct_IO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) .bmap = _affs_bmap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) static inline struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) affs_bread_ino(struct inode *inode, int block, int create)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) struct buffer_head *bh, tmp_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) tmp_bh.b_state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) err = affs_get_block(inode, block, &tmp_bh, create);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) bh = affs_bread(inode->i_sb, tmp_bh.b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) bh->b_state |= tmp_bh.b_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) static inline struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) affs_getzeroblk_ino(struct inode *inode, int block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) struct buffer_head *bh, tmp_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) tmp_bh.b_state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) err = affs_get_block(inode, block, &tmp_bh, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) bh = affs_getzeroblk(inode->i_sb, tmp_bh.b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) bh->b_state |= tmp_bh.b_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) static inline struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) affs_getemptyblk_ino(struct inode *inode, int block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) struct buffer_head *bh, tmp_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) tmp_bh.b_state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) err = affs_get_block(inode, block, &tmp_bh, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) bh = affs_getemptyblk(inode->i_sb, tmp_bh.b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) bh->b_state |= tmp_bh.b_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) affs_do_readpage_ofs(struct page *page, unsigned to, int create)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) struct inode *inode = page->mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) unsigned pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) u32 bidx, boff, bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) u32 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) pr_debug("%s(%lu, %ld, 0, %d)\n", __func__, inode->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) page->index, to);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) BUG_ON(to > PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) bsize = AFFS_SB(sb)->s_data_blksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) tmp = page->index << PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) bidx = tmp / bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) boff = tmp % bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) while (pos < to) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) bh = affs_bread_ino(inode, bidx, create);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (IS_ERR(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) return PTR_ERR(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) tmp = min(bsize - boff, to - pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) BUG_ON(pos + tmp > to || tmp > bsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) data = kmap_atomic(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) memcpy(data + pos, AFFS_DATA(bh) + boff, tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) kunmap_atomic(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) bidx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) pos += tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) boff = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) flush_dcache_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) affs_extent_file_ofs(struct inode *inode, u32 newsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) struct buffer_head *bh, *prev_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) u32 bidx, boff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) u32 size, bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) u32 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) pr_debug("%s(%lu, %d)\n", __func__, inode->i_ino, newsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) bsize = AFFS_SB(sb)->s_data_blksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) bh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) size = AFFS_I(inode)->mmu_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) bidx = size / bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) boff = size % bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) if (boff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) bh = affs_bread_ino(inode, bidx, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (IS_ERR(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) return PTR_ERR(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) tmp = min(bsize - boff, newsize - size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) BUG_ON(boff + tmp > bsize || tmp > bsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) memset(AFFS_DATA(bh) + boff, 0, tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) be32_add_cpu(&AFFS_DATA_HEAD(bh)->size, tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) affs_fix_checksum(sb, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) mark_buffer_dirty_inode(bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) size += tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) bidx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) } else if (bidx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) bh = affs_bread_ino(inode, bidx - 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if (IS_ERR(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) return PTR_ERR(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) while (size < newsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) prev_bh = bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) bh = affs_getzeroblk_ino(inode, bidx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) if (IS_ERR(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) tmp = min(bsize, newsize - size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) BUG_ON(tmp > bsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) AFFS_DATA_HEAD(bh)->ptype = cpu_to_be32(T_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) AFFS_DATA_HEAD(bh)->key = cpu_to_be32(inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) AFFS_DATA_HEAD(bh)->sequence = cpu_to_be32(bidx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) AFFS_DATA_HEAD(bh)->size = cpu_to_be32(tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) affs_fix_checksum(sb, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) bh->b_state &= ~(1UL << BH_New);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) mark_buffer_dirty_inode(bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (prev_bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) u32 tmp_next = be32_to_cpu(AFFS_DATA_HEAD(prev_bh)->next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) if (tmp_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) affs_warning(sb, "extent_file_ofs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) "next block already set for %d (%d)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) bidx, tmp_next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) AFFS_DATA_HEAD(prev_bh)->next = cpu_to_be32(bh->b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) affs_adjust_checksum(prev_bh, bh->b_blocknr - tmp_next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) mark_buffer_dirty_inode(prev_bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) affs_brelse(prev_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) size += bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) bidx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) inode->i_size = AFFS_I(inode)->mmu_private = newsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) inode->i_size = AFFS_I(inode)->mmu_private = newsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) return PTR_ERR(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) affs_readpage_ofs(struct file *file, struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) struct inode *inode = page->mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) u32 to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) pr_debug("%s(%lu, %ld)\n", __func__, inode->i_ino, page->index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) to = PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (((page->index + 1) << PAGE_SHIFT) > inode->i_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) to = inode->i_size & ~PAGE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) memset(page_address(page) + to, 0, PAGE_SIZE - to);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) err = affs_do_readpage_ofs(page, to, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) SetPageUptodate(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) static int affs_write_begin_ofs(struct file *file, struct address_space *mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) loff_t pos, unsigned len, unsigned flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct page **pagep, void **fsdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) struct inode *inode = mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) pgoff_t index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) pr_debug("%s(%lu, %llu, %llu)\n", __func__, inode->i_ino, pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) pos + len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) if (pos > AFFS_I(inode)->mmu_private) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) /* XXX: this probably leaves a too-big i_size in case of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) * failure. Should really be updating i_size at write_end time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) err = affs_extent_file_ofs(inode, pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) index = pos >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) page = grab_cache_page_write_begin(mapping, index, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) if (!page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) *pagep = page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) if (PageUptodate(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) /* XXX: inefficient but safe in the face of short writes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) err = affs_do_readpage_ofs(page, PAGE_SIZE, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) static int affs_write_end_ofs(struct file *file, struct address_space *mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) loff_t pos, unsigned len, unsigned copied,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) struct page *page, void *fsdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) struct inode *inode = mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) struct buffer_head *bh, *prev_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) u32 bidx, boff, bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) unsigned from, to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) u32 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) int written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) from = pos & (PAGE_SIZE - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) to = from + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * XXX: not sure if this can handle short copies (len < copied), but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) * we don't have to, because the page should always be uptodate here,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) * due to write_begin.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) pr_debug("%s(%lu, %llu, %llu)\n", __func__, inode->i_ino, pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) pos + len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) bsize = AFFS_SB(sb)->s_data_blksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) data = page_address(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) bh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) written = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) tmp = (page->index << PAGE_SHIFT) + from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) bidx = tmp / bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) boff = tmp % bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) if (boff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) bh = affs_bread_ino(inode, bidx, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (IS_ERR(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) written = PTR_ERR(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) goto err_first_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) tmp = min(bsize - boff, to - from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) BUG_ON(boff + tmp > bsize || tmp > bsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) memcpy(AFFS_DATA(bh) + boff, data + from, tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) be32_add_cpu(&AFFS_DATA_HEAD(bh)->size, tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) affs_fix_checksum(sb, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) mark_buffer_dirty_inode(bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) written += tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) from += tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) bidx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) } else if (bidx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) bh = affs_bread_ino(inode, bidx - 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) if (IS_ERR(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) written = PTR_ERR(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) goto err_first_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) while (from + bsize <= to) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) prev_bh = bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) bh = affs_getemptyblk_ino(inode, bidx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) if (IS_ERR(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) goto err_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) memcpy(AFFS_DATA(bh), data + from, bsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (buffer_new(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) AFFS_DATA_HEAD(bh)->ptype = cpu_to_be32(T_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) AFFS_DATA_HEAD(bh)->key = cpu_to_be32(inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) AFFS_DATA_HEAD(bh)->sequence = cpu_to_be32(bidx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) AFFS_DATA_HEAD(bh)->size = cpu_to_be32(bsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) AFFS_DATA_HEAD(bh)->next = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) bh->b_state &= ~(1UL << BH_New);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) if (prev_bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) u32 tmp_next = be32_to_cpu(AFFS_DATA_HEAD(prev_bh)->next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) if (tmp_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) affs_warning(sb, "commit_write_ofs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) "next block already set for %d (%d)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) bidx, tmp_next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) AFFS_DATA_HEAD(prev_bh)->next = cpu_to_be32(bh->b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) affs_adjust_checksum(prev_bh, bh->b_blocknr - tmp_next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) mark_buffer_dirty_inode(prev_bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) affs_brelse(prev_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) affs_fix_checksum(sb, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) mark_buffer_dirty_inode(bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) written += bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) from += bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) bidx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) if (from < to) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) prev_bh = bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) bh = affs_bread_ino(inode, bidx, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) if (IS_ERR(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) goto err_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) tmp = min(bsize, to - from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) BUG_ON(tmp > bsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) memcpy(AFFS_DATA(bh), data + from, tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) if (buffer_new(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) AFFS_DATA_HEAD(bh)->ptype = cpu_to_be32(T_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) AFFS_DATA_HEAD(bh)->key = cpu_to_be32(inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) AFFS_DATA_HEAD(bh)->sequence = cpu_to_be32(bidx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) AFFS_DATA_HEAD(bh)->size = cpu_to_be32(tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) AFFS_DATA_HEAD(bh)->next = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) bh->b_state &= ~(1UL << BH_New);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) if (prev_bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) u32 tmp_next = be32_to_cpu(AFFS_DATA_HEAD(prev_bh)->next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) if (tmp_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) affs_warning(sb, "commit_write_ofs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) "next block already set for %d (%d)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) bidx, tmp_next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) AFFS_DATA_HEAD(prev_bh)->next = cpu_to_be32(bh->b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) affs_adjust_checksum(prev_bh, bh->b_blocknr - tmp_next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) mark_buffer_dirty_inode(prev_bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) } else if (be32_to_cpu(AFFS_DATA_HEAD(bh)->size) < tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) AFFS_DATA_HEAD(bh)->size = cpu_to_be32(tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) affs_brelse(prev_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) affs_fix_checksum(sb, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) mark_buffer_dirty_inode(bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) written += tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) from += tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) bidx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) SetPageUptodate(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) tmp = (page->index << PAGE_SHIFT) + from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) if (tmp > inode->i_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) inode->i_size = AFFS_I(inode)->mmu_private = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) /* Clear Archived bit on file writes, as AmigaOS would do */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) if (AFFS_I(inode)->i_protect & FIBF_ARCHIVED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) AFFS_I(inode)->i_protect &= ~FIBF_ARCHIVED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) err_first_bh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) return written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) err_bh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) bh = prev_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) if (!written)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) written = PTR_ERR(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) const struct address_space_operations affs_aops_ofs = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) .readpage = affs_readpage_ofs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) //.writepage = affs_writepage_ofs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) .write_begin = affs_write_begin_ofs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) .write_end = affs_write_end_ofs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) /* Free any preallocated blocks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) affs_free_prealloc(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) pr_debug("free_prealloc(ino=%lu)\n", inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) while (AFFS_I(inode)->i_pa_cnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) AFFS_I(inode)->i_pa_cnt--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) affs_free_block(sb, ++AFFS_I(inode)->i_lastalloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) /* Truncate (or enlarge) a file to the requested size. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) affs_truncate(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) u32 ext, ext_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) u32 last_blk, blkcnt, blk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) u32 size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) struct buffer_head *ext_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) pr_debug("truncate(inode=%lu, oldsize=%llu, newsize=%llu)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) inode->i_ino, AFFS_I(inode)->mmu_private, inode->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) last_blk = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) ext = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) if (inode->i_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) last_blk = ((u32)inode->i_size - 1) / AFFS_SB(sb)->s_data_blksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) ext = last_blk / AFFS_SB(sb)->s_hashsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) if (inode->i_size > AFFS_I(inode)->mmu_private) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) struct address_space *mapping = inode->i_mapping;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) void *fsdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) loff_t isize = inode->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) res = mapping->a_ops->write_begin(NULL, mapping, isize, 0, 0, &page, &fsdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) res = mapping->a_ops->write_end(NULL, mapping, isize, 0, 0, page, fsdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) inode->i_size = AFFS_I(inode)->mmu_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) } else if (inode->i_size == AFFS_I(inode)->mmu_private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) // lock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) ext_bh = affs_get_extblock(inode, ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) if (IS_ERR(ext_bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) affs_warning(sb, "truncate",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) "unexpected read error for ext block %u (%ld)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) ext, PTR_ERR(ext_bh));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) if (AFFS_I(inode)->i_lc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) /* clear linear cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) i = (ext + 1) >> AFFS_I(inode)->i_lc_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) if (AFFS_I(inode)->i_lc_size > i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) AFFS_I(inode)->i_lc_size = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) for (; i < AFFS_LC_SIZE; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) AFFS_I(inode)->i_lc[i] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) /* clear associative cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) for (i = 0; i < AFFS_AC_SIZE; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) if (AFFS_I(inode)->i_ac[i].ext >= ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) AFFS_I(inode)->i_ac[i].ext = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) ext_key = be32_to_cpu(AFFS_TAIL(sb, ext_bh)->extension);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) blkcnt = AFFS_I(inode)->i_blkcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) blk = last_blk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) if (inode->i_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) i = last_blk % AFFS_SB(sb)->s_hashsize + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) blk++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) AFFS_HEAD(ext_bh)->first_data = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) AFFS_HEAD(ext_bh)->block_count = cpu_to_be32(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) size = AFFS_SB(sb)->s_hashsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) if (size > blkcnt - blk + i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) size = blkcnt - blk + i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) for (; i < size; i++, blk++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) affs_free_block(sb, be32_to_cpu(AFFS_BLOCK(sb, ext_bh, i)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) AFFS_BLOCK(sb, ext_bh, i) = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) AFFS_TAIL(sb, ext_bh)->extension = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) affs_fix_checksum(sb, ext_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) mark_buffer_dirty_inode(ext_bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) affs_brelse(ext_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) if (inode->i_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) AFFS_I(inode)->i_blkcnt = last_blk + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) AFFS_I(inode)->i_extcnt = ext + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_OFS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) struct buffer_head *bh = affs_bread_ino(inode, last_blk, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) u32 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) if (IS_ERR(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) affs_warning(sb, "truncate",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) "unexpected read error for last block %u (%ld)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) ext, PTR_ERR(bh));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) tmp = be32_to_cpu(AFFS_DATA_HEAD(bh)->next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) AFFS_DATA_HEAD(bh)->next = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) affs_adjust_checksum(bh, -tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) AFFS_I(inode)->i_blkcnt = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) AFFS_I(inode)->i_extcnt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) AFFS_I(inode)->mmu_private = inode->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) // unlock cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) while (ext_key) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) ext_bh = affs_bread(sb, ext_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) size = AFFS_SB(sb)->s_hashsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) if (size > blkcnt - blk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) size = blkcnt - blk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) for (i = 0; i < size; i++, blk++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) affs_free_block(sb, be32_to_cpu(AFFS_BLOCK(sb, ext_bh, i)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) affs_free_block(sb, ext_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) ext_key = be32_to_cpu(AFFS_TAIL(sb, ext_bh)->extension);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) affs_brelse(ext_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) affs_free_prealloc(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) int affs_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) struct inode *inode = filp->f_mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) int ret, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) err = file_write_and_wait_range(filp, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) inode_lock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) ret = write_inode_now(inode, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) err = sync_blockdev(inode->i_sb->s_bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) ret = err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) inode_unlock(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) const struct file_operations affs_file_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) .read_iter = generic_file_read_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) .write_iter = generic_file_write_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) .mmap = generic_file_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) .open = affs_file_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) .release = affs_file_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) .fsync = affs_file_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) .splice_read = generic_file_splice_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) const struct inode_operations affs_file_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) .setattr = affs_notify_change,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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