^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) * Optimized MPEG FS - inode and super operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2006 Bob Copeland <me@bobcopeland.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/cred.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/parser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/writeback.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/crc-itu-t.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "omfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) MODULE_AUTHOR("Bob Copeland <me@bobcopeland.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) MODULE_DESCRIPTION("OMFS (ReplayTV/Karma) Filesystem for Linux");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct buffer_head *omfs_bread(struct super_block *sb, sector_t block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct omfs_sb_info *sbi = OMFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) if (block >= sbi->s_num_blocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) return sb_bread(sb, clus_to_blk(sbi, block));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct inode *omfs_new_inode(struct inode *dir, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) u64 new_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct omfs_sb_info *sbi = OMFS_SB(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) inode = new_inode(dir->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) err = omfs_allocate_range(dir->i_sb, sbi->s_mirrors, sbi->s_mirrors,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) &new_block, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) inode->i_ino = new_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) inode_init_owner(inode, NULL, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) inode->i_mapping->a_ops = &omfs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) switch (mode & S_IFMT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) case S_IFDIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) inode->i_op = &omfs_dir_inops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) inode->i_fop = &omfs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) inode->i_size = sbi->s_sys_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) inc_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) case S_IFREG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) inode->i_op = &omfs_file_inops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) inode->i_fop = &omfs_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) inode->i_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) insert_inode_hash(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) make_bad_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * Update the header checksums for a dirty inode based on its contents.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * Caller is expected to hold the buffer head underlying oi and mark it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * dirty.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static void omfs_update_checksums(struct omfs_inode *oi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) int xor, i, ofs = 0, count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) u16 crc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) unsigned char *ptr = (unsigned char *) oi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) count = be32_to_cpu(oi->i_head.h_body_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) ofs = sizeof(struct omfs_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) crc = crc_itu_t(crc, ptr + ofs, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) oi->i_head.h_crc = cpu_to_be16(crc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) xor = ptr[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) for (i = 1; i < OMFS_XOR_COUNT; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) xor ^= ptr[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) oi->i_head.h_check_xor = xor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int __omfs_write_inode(struct inode *inode, int wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct omfs_inode *oi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct omfs_sb_info *sbi = OMFS_SB(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct buffer_head *bh, *bh2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) u64 ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) int ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) int sync_failed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /* get current inode since we may have written sibling ptrs etc. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) bh = omfs_bread(inode->i_sb, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) oi = (struct omfs_inode *) bh->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) oi->i_head.h_self = cpu_to_be64(inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (S_ISDIR(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) oi->i_type = OMFS_DIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) else if (S_ISREG(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) oi->i_type = OMFS_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) printk(KERN_WARNING "omfs: unknown file type: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) goto out_brelse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) oi->i_head.h_body_size = cpu_to_be32(sbi->s_sys_blocksize -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) sizeof(struct omfs_header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) oi->i_head.h_version = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) oi->i_head.h_type = OMFS_INODE_NORMAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) oi->i_head.h_magic = OMFS_IMAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) oi->i_size = cpu_to_be64(inode->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) ctime = inode->i_ctime.tv_sec * 1000LL +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ((inode->i_ctime.tv_nsec + 999)/1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) oi->i_ctime = cpu_to_be64(ctime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) omfs_update_checksums(oi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) mark_buffer_dirty(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (wait) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) sync_dirty_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (buffer_req(bh) && !buffer_uptodate(bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) sync_failed = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* if mirroring writes, copy to next fsblock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) for (i = 1; i < sbi->s_mirrors; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) bh2 = omfs_bread(inode->i_sb, inode->i_ino + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (!bh2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) goto out_brelse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) memcpy(bh2->b_data, bh->b_data, bh->b_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) mark_buffer_dirty(bh2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (wait) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) sync_dirty_buffer(bh2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (buffer_req(bh2) && !buffer_uptodate(bh2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) sync_failed = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) brelse(bh2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) ret = (sync_failed) ? -EIO : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) out_brelse:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static int omfs_write_inode(struct inode *inode, struct writeback_control *wbc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return __omfs_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) int omfs_sync_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return __omfs_write_inode(inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * called when an entry is deleted, need to clear the bits in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * bitmaps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static void omfs_evict_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) truncate_inode_pages_final(&inode->i_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) clear_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (inode->i_nlink)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (S_ISREG(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) inode->i_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) omfs_shrink_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) omfs_clear_range(inode->i_sb, inode->i_ino, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) struct inode *omfs_iget(struct super_block *sb, ino_t ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) struct omfs_sb_info *sbi = OMFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct omfs_inode *oi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) u64 ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) unsigned long nsecs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) inode = iget_locked(sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (!(inode->i_state & I_NEW))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) bh = omfs_bread(inode->i_sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) goto iget_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) oi = (struct omfs_inode *)bh->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /* check self */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (ino != be64_to_cpu(oi->i_head.h_self))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) goto fail_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) inode->i_uid = sbi->s_uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) inode->i_gid = sbi->s_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) ctime = be64_to_cpu(oi->i_ctime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) nsecs = do_div(ctime, 1000) * 1000L;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) inode->i_atime.tv_sec = ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) inode->i_mtime.tv_sec = ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) inode->i_ctime.tv_sec = ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) inode->i_atime.tv_nsec = nsecs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) inode->i_mtime.tv_nsec = nsecs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) inode->i_ctime.tv_nsec = nsecs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) inode->i_mapping->a_ops = &omfs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) switch (oi->i_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) case OMFS_DIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) inode->i_mode = S_IFDIR | (S_IRWXUGO & ~sbi->s_dmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) inode->i_op = &omfs_dir_inops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) inode->i_fop = &omfs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) inode->i_size = sbi->s_sys_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) inc_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) case OMFS_FILE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) inode->i_mode = S_IFREG | (S_IRWXUGO & ~sbi->s_fmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) inode->i_fop = &omfs_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) inode->i_size = be64_to_cpu(oi->i_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) unlock_new_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) fail_bh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) iget_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) iget_failed(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static void omfs_put_super(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct omfs_sb_info *sbi = OMFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) kfree(sbi->s_imap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) kfree(sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) sb->s_fs_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static int omfs_statfs(struct dentry *dentry, struct kstatfs *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) struct super_block *s = dentry->d_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) struct omfs_sb_info *sbi = OMFS_SB(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) u64 id = huge_encode_dev(s->s_bdev->bd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) buf->f_type = OMFS_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) buf->f_bsize = sbi->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) buf->f_blocks = sbi->s_num_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) buf->f_files = sbi->s_num_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) buf->f_namelen = OMFS_NAMELEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) buf->f_fsid = u64_to_fsid(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) buf->f_bfree = buf->f_bavail = buf->f_ffree =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) omfs_count_free(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^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) * Display the mount options in /proc/mounts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static int omfs_show_options(struct seq_file *m, struct dentry *root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) struct omfs_sb_info *sbi = OMFS_SB(root->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) umode_t cur_umask = current_umask();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (!uid_eq(sbi->s_uid, current_uid()))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) seq_printf(m, ",uid=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) from_kuid_munged(&init_user_ns, sbi->s_uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (!gid_eq(sbi->s_gid, current_gid()))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) seq_printf(m, ",gid=%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) from_kgid_munged(&init_user_ns, sbi->s_gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (sbi->s_dmask == sbi->s_fmask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (sbi->s_fmask != cur_umask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) seq_printf(m, ",umask=%o", sbi->s_fmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (sbi->s_dmask != cur_umask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) seq_printf(m, ",dmask=%o", sbi->s_dmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (sbi->s_fmask != cur_umask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) seq_printf(m, ",fmask=%o", sbi->s_fmask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static const struct super_operations omfs_sops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) .write_inode = omfs_write_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) .evict_inode = omfs_evict_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) .put_super = omfs_put_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) .statfs = omfs_statfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) .show_options = omfs_show_options,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) * For Rio Karma, there is an on-disk free bitmap whose location is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * stored in the root block. For ReplayTV, there is no such free bitmap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) * so we have to walk the tree. Both inodes and file data are allocated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) * from the same map. This array can be big (300k) so we allocate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) * in units of the blocksize.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static int omfs_get_imap(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) unsigned int bitmap_size, array_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) struct omfs_sb_info *sbi = OMFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) unsigned long **ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) sector_t block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) bitmap_size = DIV_ROUND_UP(sbi->s_num_blocks, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) array_size = DIV_ROUND_UP(bitmap_size, sb->s_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) if (sbi->s_bitmap_ino == ~0ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) sbi->s_imap_size = array_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) sbi->s_imap = kcalloc(array_size, sizeof(unsigned long *), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (!sbi->s_imap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) goto nomem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) block = clus_to_blk(sbi, sbi->s_bitmap_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (block >= sbi->s_num_blocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) goto nomem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) ptr = sbi->s_imap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) for (count = bitmap_size; count > 0; count -= sb->s_blocksize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) bh = sb_bread(sb, block++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) goto nomem_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) *ptr = kmemdup(bh->b_data, sb->s_blocksize, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) if (!*ptr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) goto nomem_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (count < sb->s_blocksize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) memset((void *)*ptr + count, 0xff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) sb->s_blocksize - count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) nomem_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) for (count = 0; count < array_size; count++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) kfree(sbi->s_imap[count]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) kfree(sbi->s_imap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) nomem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) sbi->s_imap = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) sbi->s_imap_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) Opt_uid, Opt_gid, Opt_umask, Opt_dmask, Opt_fmask, Opt_err
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) static const match_table_t tokens = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) {Opt_uid, "uid=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {Opt_gid, "gid=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) {Opt_umask, "umask=%o"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) {Opt_dmask, "dmask=%o"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) {Opt_fmask, "fmask=%o"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) {Opt_err, NULL},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) static int parse_options(char *options, struct omfs_sb_info *sbi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) substring_t args[MAX_OPT_ARGS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) int option;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (!options)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) while ((p = strsep(&options, ",")) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) int token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (!*p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) token = match_token(p, tokens, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) switch (token) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) case Opt_uid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (match_int(&args[0], &option))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) sbi->s_uid = make_kuid(current_user_ns(), option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) if (!uid_valid(sbi->s_uid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) case Opt_gid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (match_int(&args[0], &option))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) sbi->s_gid = make_kgid(current_user_ns(), option);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (!gid_valid(sbi->s_gid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) case Opt_umask:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (match_octal(&args[0], &option))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) sbi->s_fmask = sbi->s_dmask = option;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) case Opt_dmask:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (match_octal(&args[0], &option))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) sbi->s_dmask = option;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) case Opt_fmask:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) if (match_octal(&args[0], &option))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) sbi->s_fmask = option;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) static int omfs_fill_super(struct super_block *sb, void *data, int silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) struct buffer_head *bh, *bh2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) struct omfs_super_block *omfs_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) struct omfs_root_block *omfs_rb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) struct omfs_sb_info *sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) struct inode *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) int ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) sbi = kzalloc(sizeof(struct omfs_sb_info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (!sbi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) sb->s_fs_info = sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) sbi->s_uid = current_uid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) sbi->s_gid = current_gid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) sbi->s_dmask = sbi->s_fmask = current_umask();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) if (!parse_options((char *) data, sbi))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) sb->s_maxbytes = 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) sb->s_time_gran = NSEC_PER_MSEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) sb->s_time_min = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) sb->s_time_max = U64_MAX / MSEC_PER_SEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) sb_set_blocksize(sb, 0x200);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) bh = sb_bread(sb, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) omfs_sb = (struct omfs_super_block *)bh->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (omfs_sb->s_magic != cpu_to_be32(OMFS_MAGIC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (!silent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) printk(KERN_ERR "omfs: Invalid superblock (%x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) omfs_sb->s_magic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) goto out_brelse_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) sb->s_magic = OMFS_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) sbi->s_num_blocks = be64_to_cpu(omfs_sb->s_num_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) sbi->s_blocksize = be32_to_cpu(omfs_sb->s_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) sbi->s_mirrors = be32_to_cpu(omfs_sb->s_mirrors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) sbi->s_root_ino = be64_to_cpu(omfs_sb->s_root_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) sbi->s_sys_blocksize = be32_to_cpu(omfs_sb->s_sys_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) mutex_init(&sbi->s_bitmap_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) if (sbi->s_num_blocks > OMFS_MAX_BLOCKS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) printk(KERN_ERR "omfs: sysblock number (%llx) is out of range\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) (unsigned long long)sbi->s_num_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) goto out_brelse_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) if (sbi->s_sys_blocksize > PAGE_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) printk(KERN_ERR "omfs: sysblock size (%d) is out of range\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) sbi->s_sys_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) goto out_brelse_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (sbi->s_blocksize < sbi->s_sys_blocksize ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) sbi->s_blocksize > OMFS_MAX_BLOCK_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) printk(KERN_ERR "omfs: block size (%d) is out of range\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) sbi->s_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) goto out_brelse_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) * Use sys_blocksize as the fs block since it is smaller than a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) * page while the fs blocksize can be larger.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) sb_set_blocksize(sb, sbi->s_sys_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * ...and the difference goes into a shift. sys_blocksize is always
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) * a power of two factor of blocksize.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) sbi->s_block_shift = get_bitmask_order(sbi->s_blocksize) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) get_bitmask_order(sbi->s_sys_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) bh2 = omfs_bread(sb, be64_to_cpu(omfs_sb->s_root_block));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (!bh2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) goto out_brelse_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) omfs_rb = (struct omfs_root_block *)bh2->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) sbi->s_bitmap_ino = be64_to_cpu(omfs_rb->r_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) sbi->s_clustersize = be32_to_cpu(omfs_rb->r_clustersize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) if (sbi->s_num_blocks != be64_to_cpu(omfs_rb->r_num_blocks)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) printk(KERN_ERR "omfs: block count discrepancy between "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) "super and root blocks (%llx, %llx)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) (unsigned long long)sbi->s_num_blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) (unsigned long long)be64_to_cpu(omfs_rb->r_num_blocks));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) goto out_brelse_bh2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) if (sbi->s_bitmap_ino != ~0ULL &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) sbi->s_bitmap_ino > sbi->s_num_blocks) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) printk(KERN_ERR "omfs: free space bitmap location is corrupt "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) "(%llx, total blocks %llx)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) (unsigned long long) sbi->s_bitmap_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) (unsigned long long) sbi->s_num_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) goto out_brelse_bh2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) if (sbi->s_clustersize < 1 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) sbi->s_clustersize > OMFS_MAX_CLUSTER_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) printk(KERN_ERR "omfs: cluster size out of range (%d)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) sbi->s_clustersize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) goto out_brelse_bh2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) ret = omfs_get_imap(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) goto out_brelse_bh2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) sb->s_op = &omfs_sops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) root = omfs_iget(sb, be64_to_cpu(omfs_rb->r_root_dir));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) if (IS_ERR(root)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) ret = PTR_ERR(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) goto out_brelse_bh2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) sb->s_root = d_make_root(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) if (!sb->s_root) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) goto out_brelse_bh2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) printk(KERN_DEBUG "omfs: Mounted volume %s\n", omfs_rb->r_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) out_brelse_bh2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) brelse(bh2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) out_brelse_bh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) kfree(sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) static struct dentry *omfs_mount(struct file_system_type *fs_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) int flags, const char *dev_name, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) return mount_bdev(fs_type, flags, dev_name, data, omfs_fill_super);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) static struct file_system_type omfs_fs_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) .name = "omfs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) .mount = omfs_mount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) .kill_sb = kill_block_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) .fs_flags = FS_REQUIRES_DEV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) MODULE_ALIAS_FS("omfs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) static int __init init_omfs_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) return register_filesystem(&omfs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) static void __exit exit_omfs_fs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) unregister_filesystem(&omfs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) module_init(init_omfs_fs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) module_exit(exit_omfs_fs);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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