^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * QNX4 file system, Linux implementation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Version : 0.2.1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Using parts of the xiafs filesystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * History :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * 01-06-1998 by Richard Frowijn : first release.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * 20-06-1998 by Frank Denis : Linux 2.1.99+ support, boot signature, misc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * 30-06-1998 by Frank Denis : first step to write inodes.
^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/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/highuid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/writeback.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/statfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "qnx4.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define QNX4_VERSION 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define QNX4_BMNAME ".bitmap"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static const struct super_operations qnx4_sops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static struct inode *qnx4_alloc_inode(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static void qnx4_free_inode(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static int qnx4_remount(struct super_block *sb, int *flags, char *data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static int qnx4_statfs(struct dentry *, struct kstatfs *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static const struct super_operations qnx4_sops =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .alloc_inode = qnx4_alloc_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .free_inode = qnx4_free_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .statfs = qnx4_statfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .remount_fs = qnx4_remount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static int qnx4_remount(struct super_block *sb, int *flags, char *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct qnx4_sb_info *qs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) sync_filesystem(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) qs = qnx4_sb(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) qs->Version = QNX4_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) *flags |= SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_head *bh, int create )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) unsigned long phys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) QNX4DEBUG((KERN_INFO "qnx4: qnx4_get_block inode=[%ld] iblock=[%ld]\n",inode->i_ino,iblock));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) phys = qnx4_block_map( inode, iblock );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if ( phys ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) // logical block is before EOF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) map_bh(bh, inode->i_sb, phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static inline u32 try_extent(qnx4_xtnt_t *extent, u32 *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) u32 size = le32_to_cpu(extent->xtnt_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (*offset < size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return le32_to_cpu(extent->xtnt_blk) + *offset - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) *offset -= size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) unsigned long qnx4_block_map( struct inode *inode, long iblock )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) int ix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) long i_xblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct buffer_head *bh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct qnx4_xblk *xblk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct qnx4_inode_entry *qnx4_inode = qnx4_raw_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) u16 nxtnt = le16_to_cpu(qnx4_inode->di_num_xtnts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) u32 offset = iblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) u32 block = try_extent(&qnx4_inode->di_first_xtnt, &offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (block) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) // iblock is in the first extent. This is easy.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) // iblock is beyond first extent. We have to follow the extent chain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) i_xblk = le32_to_cpu(qnx4_inode->di_xblk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ix = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) while ( --nxtnt > 0 ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if ( ix == 0 ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) // read next xtnt block.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) bh = sb_bread(inode->i_sb, i_xblk - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if ( !bh ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) QNX4DEBUG((KERN_ERR "qnx4: I/O error reading xtnt block [%ld])\n", i_xblk - 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) xblk = (struct qnx4_xblk*)bh->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if ( memcmp( xblk->xblk_signature, "IamXblk", 7 ) ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) QNX4DEBUG((KERN_ERR "qnx4: block at %ld is not a valid xtnt\n", qnx4_inode->i_xblk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) block = try_extent(&xblk->xblk_xtnts[ix], &offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (block) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) // got it!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if ( ++ix >= xblk->xblk_num_xtnts ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) i_xblk = le32_to_cpu(xblk->xblk_next_xblk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) ix = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) brelse( bh );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) bh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if ( bh )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) brelse( bh );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) QNX4DEBUG((KERN_INFO "qnx4: mapping block %ld of inode %ld = %ld\n",iblock,inode->i_ino,block));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int qnx4_statfs(struct dentry *dentry, struct kstatfs *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct super_block *sb = dentry->d_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) buf->f_type = sb->s_magic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) buf->f_bsize = sb->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) buf->f_blocks = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size) * 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) buf->f_bfree = qnx4_count_free_blocks(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) buf->f_bavail = buf->f_bfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) buf->f_namelen = QNX4_NAME_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) buf->f_fsid = u64_to_fsid(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * Check the root directory of the filesystem to make sure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * it really _is_ a qnx4 filesystem, and to check the size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * of the directory entry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static const char *qnx4_checkroot(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct qnx4_super_block *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct qnx4_inode_entry *rootdir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) int rd, rl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (s->RootDir.di_fname[0] != '/' || s->RootDir.di_fname[1] != '\0')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return "no qnx4 filesystem (no root dir).";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) QNX4DEBUG((KERN_NOTICE "QNX4 filesystem found on dev %s.\n", sb->s_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) rd = le32_to_cpu(s->RootDir.di_first_xtnt.xtnt_blk) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) rl = le32_to_cpu(s->RootDir.di_first_xtnt.xtnt_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) for (j = 0; j < rl; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) bh = sb_bread(sb, rd + j); /* root dir, first block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (bh == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return "unable to read root entry.";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) rootdir = (struct qnx4_inode_entry *) bh->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) for (i = 0; i < QNX4_INODES_PER_BLOCK; i++, rootdir++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) QNX4DEBUG((KERN_INFO "rootdir entry found : [%s]\n", rootdir->di_fname));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (strcmp(rootdir->di_fname, QNX4_BMNAME) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) qnx4_sb(sb)->BitMap = kmemdup(rootdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) sizeof(struct qnx4_inode_entry),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (!qnx4_sb(sb)->BitMap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return "not enough memory for bitmap inode";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /* keep bitmap inode known */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return "bitmap file not found.";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static int qnx4_fill_super(struct super_block *s, void *data, int silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct inode *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) const char *errmsg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) struct qnx4_sb_info *qs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (!qs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) s->s_fs_info = qs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) sb_set_blocksize(s, QNX4_BLOCK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) s->s_op = &qnx4_sops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) s->s_magic = QNX4_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) s->s_flags |= SB_RDONLY; /* Yup, read-only yet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) s->s_time_min = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) s->s_time_max = U32_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /* Check the superblock signature. Since the qnx4 code is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) dangerous, we should leave as quickly as possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if we don't belong here... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) bh = sb_bread(s, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (!bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) printk(KERN_ERR "qnx4: unable to read the superblock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) return -EINVAL;
^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) /* check before allocating dentries, inodes, .. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) errmsg = qnx4_checkroot(s, (struct qnx4_super_block *) bh->b_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (errmsg != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) printk(KERN_ERR "qnx4: %s\n", errmsg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /* does root not have inode number QNX4_ROOT_INO ?? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) root = qnx4_iget(s, QNX4_ROOT_INO * QNX4_INODES_PER_BLOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (IS_ERR(root)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) printk(KERN_ERR "qnx4: get inode failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) return PTR_ERR(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) s->s_root = d_make_root(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (s->s_root == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static void qnx4_kill_sb(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct qnx4_sb_info *qs = qnx4_sb(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) kill_block_super(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (qs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) kfree(qs->BitMap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) kfree(qs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static int qnx4_readpage(struct file *file, struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return block_read_full_page(page,qnx4_get_block);
^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) static sector_t qnx4_bmap(struct address_space *mapping, sector_t block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return generic_block_bmap(mapping,block,qnx4_get_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static const struct address_space_operations qnx4_aops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) .readpage = qnx4_readpage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) .bmap = qnx4_bmap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) struct inode *qnx4_iget(struct super_block *sb, unsigned long ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) struct qnx4_inode_entry *raw_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) int block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct qnx4_inode_entry *qnx4_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) inode = iget_locked(sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (!(inode->i_state & I_NEW))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) qnx4_inode = qnx4_raw_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) inode->i_mode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) QNX4DEBUG((KERN_INFO "reading inode : [%d]\n", ino));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (!ino) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) printk(KERN_ERR "qnx4: bad inode number on dev %s: %lu is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) "out of range\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) sb->s_id, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) iget_failed(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) block = ino / QNX4_INODES_PER_BLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (!(bh = sb_bread(sb, block))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) printk(KERN_ERR "qnx4: major problem: unable to read inode from dev "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) "%s\n", sb->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) iget_failed(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) raw_inode = ((struct qnx4_inode_entry *) bh->b_data) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) (ino % QNX4_INODES_PER_BLOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) inode->i_mode = le16_to_cpu(raw_inode->di_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) i_uid_write(inode, (uid_t)le16_to_cpu(raw_inode->di_uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) i_gid_write(inode, (gid_t)le16_to_cpu(raw_inode->di_gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) set_nlink(inode, le16_to_cpu(raw_inode->di_nlink));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) inode->i_size = le32_to_cpu(raw_inode->di_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) inode->i_mtime.tv_sec = le32_to_cpu(raw_inode->di_mtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) inode->i_mtime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) inode->i_atime.tv_sec = le32_to_cpu(raw_inode->di_atime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) inode->i_atime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) inode->i_ctime.tv_sec = le32_to_cpu(raw_inode->di_ctime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) inode->i_ctime.tv_nsec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) inode->i_blocks = le32_to_cpu(raw_inode->di_first_xtnt.xtnt_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) memcpy(qnx4_inode, raw_inode, QNX4_DIR_ENTRY_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (S_ISREG(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) inode->i_fop = &generic_ro_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) inode->i_mapping->a_ops = &qnx4_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) qnx4_i(inode)->mmu_private = inode->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) } else if (S_ISDIR(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) inode->i_op = &qnx4_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) inode->i_fop = &qnx4_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) } else if (S_ISLNK(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) inode->i_op = &page_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) inode_nohighmem(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) inode->i_mapping->a_ops = &qnx4_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) qnx4_i(inode)->mmu_private = inode->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) printk(KERN_ERR "qnx4: bad inode %lu on dev %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) ino, sb->s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) iget_failed(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) unlock_new_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) static struct kmem_cache *qnx4_inode_cachep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) static struct inode *qnx4_alloc_inode(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) struct qnx4_inode_info *ei;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) ei = kmem_cache_alloc(qnx4_inode_cachep, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (!ei)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return &ei->vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) static void qnx4_free_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) kmem_cache_free(qnx4_inode_cachep, qnx4_i(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) static void init_once(void *foo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) struct qnx4_inode_info *ei = (struct qnx4_inode_info *) foo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) inode_init_once(&ei->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static int init_inodecache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) qnx4_inode_cachep = kmem_cache_create("qnx4_inode_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) sizeof(struct qnx4_inode_info),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 0, (SLAB_RECLAIM_ACCOUNT|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) SLAB_MEM_SPREAD|SLAB_ACCOUNT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) init_once);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (qnx4_inode_cachep == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) static void destroy_inodecache(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * Make sure all delayed rcu free inodes are flushed before we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * destroy cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) rcu_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) kmem_cache_destroy(qnx4_inode_cachep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) static struct dentry *qnx4_mount(struct file_system_type *fs_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) int flags, const char *dev_name, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return mount_bdev(fs_type, flags, dev_name, data, qnx4_fill_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) static struct file_system_type qnx4_fs_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) .name = "qnx4",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) .mount = qnx4_mount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) .kill_sb = qnx4_kill_sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) .fs_flags = FS_REQUIRES_DEV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) MODULE_ALIAS_FS("qnx4");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) static int __init init_qnx4_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) err = init_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) err = register_filesystem(&qnx4_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) destroy_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return err;
^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) printk(KERN_INFO "QNX4 filesystem 0.2.3 registered.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) static void __exit exit_qnx4_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) unregister_filesystem(&qnx4_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) destroy_inodecache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) module_init(init_qnx4_fs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) module_exit(exit_qnx4_fs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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