| 1 |
1275 |
phoenix |
/*
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| 2 |
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* linux/fs/affs/inode.c
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| 3 |
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*
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| 4 |
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* (c) 1996 Hans-Joachim Widmaier - Rewritten
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| 5 |
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*
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| 6 |
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* (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
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| 7 |
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*
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| 8 |
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* (C) 1992 Eric Youngdale Modified for ISO 9660 filesystem.
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| 9 |
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*
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| 10 |
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* (C) 1991 Linus Torvalds - minix filesystem
|
| 11 |
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*/
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| 12 |
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| 13 |
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#include <linux/module.h>
|
| 14 |
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#include <linux/errno.h>
|
| 15 |
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#include <linux/fs.h>
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| 16 |
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#include <linux/slab.h>
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| 17 |
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#include <linux/stat.h>
|
| 18 |
|
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#include <linux/sched.h>
|
| 19 |
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#include <linux/affs_fs.h>
|
| 20 |
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#include <linux/kernel.h>
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| 21 |
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#include <linux/mm.h>
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| 22 |
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#include <linux/string.h>
|
| 23 |
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#include <linux/locks.h>
|
| 24 |
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#include <linux/genhd.h>
|
| 25 |
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#include <linux/amigaffs.h>
|
| 26 |
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#include <linux/major.h>
|
| 27 |
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#include <linux/blkdev.h>
|
| 28 |
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#include <linux/init.h>
|
| 29 |
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#include <asm/system.h>
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| 30 |
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#include <asm/uaccess.h>
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| 31 |
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| 32 |
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extern int *blk_size[];
|
| 33 |
|
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extern struct timezone sys_tz;
|
| 34 |
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| 35 |
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static int affs_statfs(struct super_block *sb, struct statfs *buf);
|
| 36 |
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static int affs_remount (struct super_block *sb, int *flags, char *data);
|
| 37 |
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| 38 |
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static void
|
| 39 |
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affs_put_super(struct super_block *sb)
|
| 40 |
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{
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| 41 |
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pr_debug("AFFS: put_super()\n");
|
| 42 |
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|
| 43 |
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if (!(sb->s_flags & MS_RDONLY)) {
|
| 44 |
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AFFS_ROOT_TAIL(sb, AFFS_SB->s_root_bh)->bm_flag = be32_to_cpu(1);
|
| 45 |
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secs_to_datestamp(CURRENT_TIME,
|
| 46 |
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&AFFS_ROOT_TAIL(sb, AFFS_SB->s_root_bh)->disk_change);
|
| 47 |
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affs_fix_checksum(sb, AFFS_SB->s_root_bh);
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| 48 |
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mark_buffer_dirty(AFFS_SB->s_root_bh);
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| 49 |
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}
|
| 50 |
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|
| 51 |
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affs_brelse(AFFS_SB->s_bmap_bh);
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| 52 |
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if (AFFS_SB->s_prefix)
|
| 53 |
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kfree(AFFS_SB->s_prefix);
|
| 54 |
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kfree(AFFS_SB->s_bitmap);
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| 55 |
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affs_brelse(AFFS_SB->s_root_bh);
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| 56 |
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| 57 |
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return;
|
| 58 |
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}
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| 59 |
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| 60 |
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static void
|
| 61 |
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affs_write_super(struct super_block *sb)
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| 62 |
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{
|
| 63 |
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int clean = 2;
|
| 64 |
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|
| 65 |
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if (!(sb->s_flags & MS_RDONLY)) {
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| 66 |
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// if (AFFS_SB->s_bitmap[i].bm_bh) {
|
| 67 |
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// if (buffer_dirty(AFFS_SB->s_bitmap[i].bm_bh)) {
|
| 68 |
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// clean = 0;
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| 69 |
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AFFS_ROOT_TAIL(sb, AFFS_SB->s_root_bh)->bm_flag = be32_to_cpu(clean);
|
| 70 |
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secs_to_datestamp(CURRENT_TIME,
|
| 71 |
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&AFFS_ROOT_TAIL(sb, AFFS_SB->s_root_bh)->disk_change);
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| 72 |
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affs_fix_checksum(sb, AFFS_SB->s_root_bh);
|
| 73 |
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mark_buffer_dirty(AFFS_SB->s_root_bh);
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| 74 |
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sb->s_dirt = !clean; /* redo until bitmap synced */
|
| 75 |
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} else
|
| 76 |
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sb->s_dirt = 0;
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| 77 |
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|
| 78 |
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pr_debug("AFFS: write_super() at %lu, clean=%d\n", CURRENT_TIME, clean);
|
| 79 |
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}
|
| 80 |
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|
| 81 |
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static struct super_operations affs_sops = {
|
| 82 |
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read_inode: affs_read_inode,
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| 83 |
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write_inode: affs_write_inode,
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| 84 |
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put_inode: affs_put_inode,
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| 85 |
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delete_inode: affs_delete_inode,
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| 86 |
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clear_inode: affs_clear_inode,
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| 87 |
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put_super: affs_put_super,
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| 88 |
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write_super: affs_write_super,
|
| 89 |
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statfs: affs_statfs,
|
| 90 |
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remount_fs: affs_remount,
|
| 91 |
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};
|
| 92 |
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|
| 93 |
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static int
|
| 94 |
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parse_options(char *options, uid_t *uid, gid_t *gid, int *mode, int *reserved, s32 *root,
|
| 95 |
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int *blocksize, char **prefix, char *volume, unsigned long *mount_opts)
|
| 96 |
|
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{
|
| 97 |
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char *this_char, *value, *optn;
|
| 98 |
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int f;
|
| 99 |
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| 100 |
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/* Fill in defaults */
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| 101 |
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| 102 |
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*uid = current->uid;
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| 103 |
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*gid = current->gid;
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| 104 |
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*reserved = 2;
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| 105 |
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*root = -1;
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| 106 |
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*blocksize = -1;
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| 107 |
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volume[0] = ':';
|
| 108 |
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volume[1] = 0;
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| 109 |
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*mount_opts = 0;
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| 110 |
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if (!options)
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| 111 |
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return 1;
|
| 112 |
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for (this_char = strtok(options,","); this_char; this_char = strtok(NULL,",")) {
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| 113 |
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f = 0;
|
| 114 |
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if ((value = strchr(this_char,'=')) != NULL)
|
| 115 |
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*value++ = 0;
|
| 116 |
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if ((optn = "protect") && !strcmp(this_char, optn)) {
|
| 117 |
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if (value)
|
| 118 |
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goto out_inv_arg;
|
| 119 |
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*mount_opts |= SF_IMMUTABLE;
|
| 120 |
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} else if ((optn = "verbose") && !strcmp(this_char, optn)) {
|
| 121 |
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if (value)
|
| 122 |
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goto out_inv_arg;
|
| 123 |
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*mount_opts |= SF_VERBOSE;
|
| 124 |
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} else if ((optn = "mufs") && !strcmp(this_char, optn)) {
|
| 125 |
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if (value)
|
| 126 |
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goto out_inv_arg;
|
| 127 |
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*mount_opts |= SF_MUFS;
|
| 128 |
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} else if ((f = !strcmp(this_char,"setuid")) || !strcmp(this_char,"setgid")) {
|
| 129 |
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if (value) {
|
| 130 |
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if (!*value) {
|
| 131 |
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printk("AFFS: Argument for set[ug]id option missing\n");
|
| 132 |
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return 0;
|
| 133 |
|
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} else {
|
| 134 |
|
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(f ? *uid : *gid) = simple_strtoul(value,&value,0);
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| 135 |
|
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if (*value) {
|
| 136 |
|
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printk("AFFS: Bad set[ug]id argument\n");
|
| 137 |
|
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return 0;
|
| 138 |
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}
|
| 139 |
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*mount_opts |= f ? SF_SETUID : SF_SETGID;
|
| 140 |
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}
|
| 141 |
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}
|
| 142 |
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} else if (!strcmp(this_char,"prefix")) {
|
| 143 |
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optn = "prefix";
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| 144 |
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if (!value || !*value)
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| 145 |
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goto out_no_arg;
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| 146 |
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if (*prefix) { /* Free any previous prefix */
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| 147 |
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kfree(*prefix);
|
| 148 |
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*prefix = NULL;
|
| 149 |
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}
|
| 150 |
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*prefix = kmalloc(strlen(value) + 1,GFP_KERNEL);
|
| 151 |
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if (!*prefix)
|
| 152 |
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return 0;
|
| 153 |
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strcpy(*prefix,value);
|
| 154 |
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*mount_opts |= SF_PREFIX;
|
| 155 |
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} else if (!strcmp(this_char,"volume")) {
|
| 156 |
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optn = "volume";
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| 157 |
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if (!value || !*value)
|
| 158 |
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goto out_no_arg;
|
| 159 |
|
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if (strlen(value) > 30)
|
| 160 |
|
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value[30] = 0;
|
| 161 |
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strncpy(volume,value,30);
|
| 162 |
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} else if (!strcmp(this_char,"mode")) {
|
| 163 |
|
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optn = "mode";
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| 164 |
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if (!value || !*value)
|
| 165 |
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goto out_no_arg;
|
| 166 |
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*mode = simple_strtoul(value,&value,8) & 0777;
|
| 167 |
|
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if (*value)
|
| 168 |
|
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return 0;
|
| 169 |
|
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*mount_opts |= SF_SETMODE;
|
| 170 |
|
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} else if (!strcmp(this_char,"reserved")) {
|
| 171 |
|
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optn = "reserved";
|
| 172 |
|
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if (!value || !*value)
|
| 173 |
|
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goto out_no_arg;
|
| 174 |
|
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*reserved = simple_strtoul(value,&value,0);
|
| 175 |
|
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if (*value)
|
| 176 |
|
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return 0;
|
| 177 |
|
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} else if (!strcmp(this_char,"root")) {
|
| 178 |
|
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optn = "root";
|
| 179 |
|
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if (!value || !*value)
|
| 180 |
|
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goto out_no_arg;
|
| 181 |
|
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*root = simple_strtoul(value,&value,0);
|
| 182 |
|
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if (*value)
|
| 183 |
|
|
return 0;
|
| 184 |
|
|
} else if (!strcmp(this_char,"bs")) {
|
| 185 |
|
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optn = "bs";
|
| 186 |
|
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if (!value || !*value)
|
| 187 |
|
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goto out_no_arg;
|
| 188 |
|
|
*blocksize = simple_strtoul(value,&value,0);
|
| 189 |
|
|
if (*value)
|
| 190 |
|
|
return 0;
|
| 191 |
|
|
if (*blocksize != 512 && *blocksize != 1024 && *blocksize != 2048
|
| 192 |
|
|
&& *blocksize != 4096) {
|
| 193 |
|
|
printk ("AFFS: Invalid blocksize (512, 1024, 2048, 4096 allowed)\n");
|
| 194 |
|
|
return 0;
|
| 195 |
|
|
}
|
| 196 |
|
|
} else if (!strcmp (this_char, "grpquota")
|
| 197 |
|
|
|| !strcmp (this_char, "noquota")
|
| 198 |
|
|
|| !strcmp (this_char, "quota")
|
| 199 |
|
|
|| !strcmp (this_char, "usrquota"))
|
| 200 |
|
|
/* Silently ignore the quota options */
|
| 201 |
|
|
;
|
| 202 |
|
|
else {
|
| 203 |
|
|
printk("AFFS: Unrecognized mount option %s\n", this_char);
|
| 204 |
|
|
return 0;
|
| 205 |
|
|
}
|
| 206 |
|
|
}
|
| 207 |
|
|
return 1;
|
| 208 |
|
|
|
| 209 |
|
|
out_no_arg:
|
| 210 |
|
|
printk("AFFS: The %s option requires an argument\n", optn);
|
| 211 |
|
|
return 0;
|
| 212 |
|
|
out_inv_arg:
|
| 213 |
|
|
printk("AFFS: Option %s does not take an argument\n", optn);
|
| 214 |
|
|
return 0;
|
| 215 |
|
|
}
|
| 216 |
|
|
|
| 217 |
|
|
/* This function definitely needs to be split up. Some fine day I'll
|
| 218 |
|
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* hopefully have the guts to do so. Until then: sorry for the mess.
|
| 219 |
|
|
*/
|
| 220 |
|
|
|
| 221 |
|
|
static struct super_block *
|
| 222 |
|
|
affs_read_super(struct super_block *sb, void *data, int silent)
|
| 223 |
|
|
{
|
| 224 |
|
|
struct buffer_head *root_bh = NULL;
|
| 225 |
|
|
struct buffer_head *boot_bh;
|
| 226 |
|
|
struct inode *root_inode = NULL;
|
| 227 |
|
|
kdev_t dev = sb->s_dev;
|
| 228 |
|
|
s32 root_block;
|
| 229 |
|
|
int blocks, size, blocksize;
|
| 230 |
|
|
u32 chksum;
|
| 231 |
|
|
int num_bm;
|
| 232 |
|
|
int i, j;
|
| 233 |
|
|
s32 key;
|
| 234 |
|
|
uid_t uid;
|
| 235 |
|
|
gid_t gid;
|
| 236 |
|
|
int reserved;
|
| 237 |
|
|
unsigned long mount_flags;
|
| 238 |
|
|
|
| 239 |
|
|
pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");
|
| 240 |
|
|
|
| 241 |
|
|
sb->s_magic = AFFS_SUPER_MAGIC;
|
| 242 |
|
|
sb->s_op = &affs_sops;
|
| 243 |
|
|
memset(AFFS_SB, 0, sizeof(*AFFS_SB));
|
| 244 |
|
|
init_MUTEX(&AFFS_SB->s_bmlock);
|
| 245 |
|
|
|
| 246 |
|
|
if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block,
|
| 247 |
|
|
&blocksize,&AFFS_SB->s_prefix,
|
| 248 |
|
|
AFFS_SB->s_volume, &mount_flags)) {
|
| 249 |
|
|
printk(KERN_ERR "AFFS: Error parsing options\n");
|
| 250 |
|
|
return NULL;
|
| 251 |
|
|
}
|
| 252 |
|
|
/* N.B. after this point s_prefix must be released */
|
| 253 |
|
|
|
| 254 |
|
|
AFFS_SB->s_flags = mount_flags;
|
| 255 |
|
|
AFFS_SB->s_mode = i;
|
| 256 |
|
|
AFFS_SB->s_uid = uid;
|
| 257 |
|
|
AFFS_SB->s_gid = gid;
|
| 258 |
|
|
AFFS_SB->s_reserved= reserved;
|
| 259 |
|
|
|
| 260 |
|
|
/* Get the size of the device in 512-byte blocks.
|
| 261 |
|
|
* If we later see that the partition uses bigger
|
| 262 |
|
|
* blocks, we will have to change it.
|
| 263 |
|
|
*/
|
| 264 |
|
|
|
| 265 |
|
|
blocks = blk_size[MAJOR(dev)] ? blk_size[MAJOR(dev)][MINOR(dev)] : 0;
|
| 266 |
|
|
if (!blocks) {
|
| 267 |
|
|
printk(KERN_ERR "AFFS: Could not determine device size\n");
|
| 268 |
|
|
goto out_error;
|
| 269 |
|
|
}
|
| 270 |
|
|
size = (BLOCK_SIZE / 512) * blocks;
|
| 271 |
|
|
pr_debug("AFFS: initial blksize=%d, blocks=%d\n", 512, blocks);
|
| 272 |
|
|
|
| 273 |
|
|
affs_set_blocksize(sb, PAGE_SIZE);
|
| 274 |
|
|
/* Try to find root block. Its location depends on the block size. */
|
| 275 |
|
|
|
| 276 |
|
|
i = 512;
|
| 277 |
|
|
j = 4096;
|
| 278 |
|
|
if (blocksize > 0) {
|
| 279 |
|
|
i = j = blocksize;
|
| 280 |
|
|
size = size / (blocksize / 512);
|
| 281 |
|
|
}
|
| 282 |
|
|
for (blocksize = i, key = 0; blocksize <= j; blocksize <<= 1, size >>= 1) {
|
| 283 |
|
|
AFFS_SB->s_root_block = root_block;
|
| 284 |
|
|
if (root_block < 0)
|
| 285 |
|
|
AFFS_SB->s_root_block = (reserved + size - 1) / 2;
|
| 286 |
|
|
pr_debug("AFFS: setting blocksize to %d\n", blocksize);
|
| 287 |
|
|
affs_set_blocksize(sb, blocksize);
|
| 288 |
|
|
AFFS_SB->s_partition_size = size;
|
| 289 |
|
|
|
| 290 |
|
|
/* The root block location that was calculated above is not
|
| 291 |
|
|
* correct if the partition size is an odd number of 512-
|
| 292 |
|
|
* byte blocks, which will be rounded down to a number of
|
| 293 |
|
|
* 1024-byte blocks, and if there were an even number of
|
| 294 |
|
|
* reserved blocks. Ideally, all partition checkers should
|
| 295 |
|
|
* report the real number of blocks of the real blocksize,
|
| 296 |
|
|
* but since this just cannot be done, we have to try to
|
| 297 |
|
|
* find the root block anyways. In the above case, it is one
|
| 298 |
|
|
* block behind the calculated one. So we check this one, too.
|
| 299 |
|
|
*/
|
| 300 |
|
|
for (num_bm = 0; num_bm < 2; num_bm++) {
|
| 301 |
|
|
pr_debug("AFFS: Dev %s, trying root=%u, bs=%d, "
|
| 302 |
|
|
"size=%d, reserved=%d\n",
|
| 303 |
|
|
kdevname(dev),
|
| 304 |
|
|
AFFS_SB->s_root_block + num_bm,
|
| 305 |
|
|
blocksize, size, reserved);
|
| 306 |
|
|
root_bh = affs_bread(sb, AFFS_SB->s_root_block + num_bm);
|
| 307 |
|
|
if (!root_bh)
|
| 308 |
|
|
continue;
|
| 309 |
|
|
if (!affs_checksum_block(sb, root_bh) &&
|
| 310 |
|
|
be32_to_cpu(AFFS_ROOT_HEAD(root_bh)->ptype) == T_SHORT &&
|
| 311 |
|
|
be32_to_cpu(AFFS_ROOT_TAIL(sb, root_bh)->stype) == ST_ROOT) {
|
| 312 |
|
|
AFFS_SB->s_hashsize = blocksize / 4 - 56;
|
| 313 |
|
|
AFFS_SB->s_root_block += num_bm;
|
| 314 |
|
|
key = 1;
|
| 315 |
|
|
goto got_root;
|
| 316 |
|
|
}
|
| 317 |
|
|
affs_brelse(root_bh);
|
| 318 |
|
|
root_bh = NULL;
|
| 319 |
|
|
}
|
| 320 |
|
|
}
|
| 321 |
|
|
if (!silent)
|
| 322 |
|
|
printk(KERN_ERR "AFFS: No valid root block on device %s\n",
|
| 323 |
|
|
kdevname(dev));
|
| 324 |
|
|
goto out_error;
|
| 325 |
|
|
|
| 326 |
|
|
/* N.B. after this point bh must be released */
|
| 327 |
|
|
got_root:
|
| 328 |
|
|
root_block = AFFS_SB->s_root_block;
|
| 329 |
|
|
|
| 330 |
|
|
sb->s_blocksize_bits = blocksize == 512 ? 9 :
|
| 331 |
|
|
blocksize == 1024 ? 10 :
|
| 332 |
|
|
blocksize == 2048 ? 11 : 12;
|
| 333 |
|
|
|
| 334 |
|
|
/* Find out which kind of FS we have */
|
| 335 |
|
|
boot_bh = sb_bread(sb, 0);
|
| 336 |
|
|
if (!boot_bh) {
|
| 337 |
|
|
printk(KERN_ERR "AFFS: Cannot read boot block\n");
|
| 338 |
|
|
goto out_error;
|
| 339 |
|
|
}
|
| 340 |
|
|
chksum = be32_to_cpu(*(u32 *)boot_bh->b_data);
|
| 341 |
|
|
brelse(boot_bh);
|
| 342 |
|
|
|
| 343 |
|
|
/* Dircache filesystems are compatible with non-dircache ones
|
| 344 |
|
|
* when reading. As long as they aren't supported, writing is
|
| 345 |
|
|
* not recommended.
|
| 346 |
|
|
*/
|
| 347 |
|
|
if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS
|
| 348 |
|
|
|| chksum == MUFS_DCOFS) && !(sb->s_flags & MS_RDONLY)) {
|
| 349 |
|
|
printk(KERN_NOTICE "AFFS: Dircache FS - mounting %s read only\n",
|
| 350 |
|
|
kdevname(dev));
|
| 351 |
|
|
sb->s_flags |= MS_RDONLY;
|
| 352 |
|
|
AFFS_SB->s_flags |= SF_READONLY;
|
| 353 |
|
|
}
|
| 354 |
|
|
switch (chksum) {
|
| 355 |
|
|
case MUFS_FS:
|
| 356 |
|
|
case MUFS_INTLFFS:
|
| 357 |
|
|
case MUFS_DCFFS:
|
| 358 |
|
|
AFFS_SB->s_flags |= SF_MUFS;
|
| 359 |
|
|
/* fall thru */
|
| 360 |
|
|
case FS_INTLFFS:
|
| 361 |
|
|
case FS_DCFFS:
|
| 362 |
|
|
AFFS_SB->s_flags |= SF_INTL;
|
| 363 |
|
|
break;
|
| 364 |
|
|
case MUFS_FFS:
|
| 365 |
|
|
AFFS_SB->s_flags |= SF_MUFS;
|
| 366 |
|
|
break;
|
| 367 |
|
|
case FS_FFS:
|
| 368 |
|
|
break;
|
| 369 |
|
|
case MUFS_OFS:
|
| 370 |
|
|
AFFS_SB->s_flags |= SF_MUFS;
|
| 371 |
|
|
/* fall thru */
|
| 372 |
|
|
case FS_OFS:
|
| 373 |
|
|
AFFS_SB->s_flags |= SF_OFS;
|
| 374 |
|
|
sb->s_flags |= MS_NOEXEC;
|
| 375 |
|
|
break;
|
| 376 |
|
|
case MUFS_DCOFS:
|
| 377 |
|
|
case MUFS_INTLOFS:
|
| 378 |
|
|
AFFS_SB->s_flags |= SF_MUFS;
|
| 379 |
|
|
case FS_DCOFS:
|
| 380 |
|
|
case FS_INTLOFS:
|
| 381 |
|
|
AFFS_SB->s_flags |= SF_INTL | SF_OFS;
|
| 382 |
|
|
sb->s_flags |= MS_NOEXEC;
|
| 383 |
|
|
break;
|
| 384 |
|
|
default:
|
| 385 |
|
|
printk(KERN_ERR "AFFS: Unknown filesystem on device %s: %08X\n",
|
| 386 |
|
|
kdevname(dev), chksum);
|
| 387 |
|
|
goto out_error;
|
| 388 |
|
|
}
|
| 389 |
|
|
|
| 390 |
|
|
if (mount_flags & SF_VERBOSE) {
|
| 391 |
|
|
chksum = cpu_to_be32(chksum);
|
| 392 |
|
|
printk(KERN_NOTICE "AFFS: Mounting volume \"%*s\": Type=%.3s\\%c, Blocksize=%d\n",
|
| 393 |
|
|
AFFS_ROOT_TAIL(sb, root_bh)->disk_name[0],
|
| 394 |
|
|
AFFS_ROOT_TAIL(sb, root_bh)->disk_name + 1,
|
| 395 |
|
|
(char *)&chksum,((char *)&chksum)[3] + '0',blocksize);
|
| 396 |
|
|
}
|
| 397 |
|
|
|
| 398 |
|
|
sb->s_flags |= MS_NODEV | MS_NOSUID;
|
| 399 |
|
|
|
| 400 |
|
|
AFFS_SB->s_data_blksize = sb->s_blocksize;
|
| 401 |
|
|
if (AFFS_SB->s_flags & SF_OFS)
|
| 402 |
|
|
AFFS_SB->s_data_blksize -= 24;
|
| 403 |
|
|
|
| 404 |
|
|
/* Keep super block in cache */
|
| 405 |
|
|
AFFS_SB->s_root_bh = root_bh;
|
| 406 |
|
|
/* N.B. after this point s_root_bh must be released */
|
| 407 |
|
|
|
| 408 |
|
|
if (affs_init_bitmap(sb))
|
| 409 |
|
|
goto out_error;
|
| 410 |
|
|
|
| 411 |
|
|
/* set up enough so that it can read an inode */
|
| 412 |
|
|
|
| 413 |
|
|
root_inode = iget(sb, root_block);
|
| 414 |
|
|
sb->s_root = d_alloc_root(root_inode);
|
| 415 |
|
|
if (!sb->s_root) {
|
| 416 |
|
|
printk(KERN_ERR "AFFS: Get root inode failed\n");
|
| 417 |
|
|
goto out_error;
|
| 418 |
|
|
}
|
| 419 |
|
|
sb->s_root->d_op = &affs_dentry_operations;
|
| 420 |
|
|
|
| 421 |
|
|
pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
|
| 422 |
|
|
return sb;
|
| 423 |
|
|
|
| 424 |
|
|
/*
|
| 425 |
|
|
* Begin the cascaded cleanup ...
|
| 426 |
|
|
*/
|
| 427 |
|
|
out_error:
|
| 428 |
|
|
if (root_inode)
|
| 429 |
|
|
iput(root_inode);
|
| 430 |
|
|
if (AFFS_SB->s_bitmap)
|
| 431 |
|
|
kfree(AFFS_SB->s_bitmap);
|
| 432 |
|
|
affs_brelse(root_bh);
|
| 433 |
|
|
if (AFFS_SB->s_prefix)
|
| 434 |
|
|
kfree(AFFS_SB->s_prefix);
|
| 435 |
|
|
return NULL;
|
| 436 |
|
|
}
|
| 437 |
|
|
|
| 438 |
|
|
static int
|
| 439 |
|
|
affs_remount(struct super_block *sb, int *flags, char *data)
|
| 440 |
|
|
{
|
| 441 |
|
|
int blocksize;
|
| 442 |
|
|
uid_t uid;
|
| 443 |
|
|
gid_t gid;
|
| 444 |
|
|
int mode;
|
| 445 |
|
|
int reserved;
|
| 446 |
|
|
int root_block;
|
| 447 |
|
|
unsigned long mount_flags;
|
| 448 |
|
|
unsigned long read_only = AFFS_SB->s_flags & SF_READONLY;
|
| 449 |
|
|
|
| 450 |
|
|
pr_debug("AFFS: remount(flags=0x%x,opts=\"%s\")\n",*flags,data);
|
| 451 |
|
|
|
| 452 |
|
|
if (!parse_options(data,&uid,&gid,&mode,&reserved,&root_block,
|
| 453 |
|
|
&blocksize,&AFFS_SB->s_prefix,AFFS_SB->s_volume,&mount_flags))
|
| 454 |
|
|
return -EINVAL;
|
| 455 |
|
|
AFFS_SB->s_flags = mount_flags | read_only;
|
| 456 |
|
|
AFFS_SB->s_mode = mode;
|
| 457 |
|
|
AFFS_SB->s_uid = uid;
|
| 458 |
|
|
AFFS_SB->s_gid = gid;
|
| 459 |
|
|
|
| 460 |
|
|
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
|
| 461 |
|
|
return 0;
|
| 462 |
|
|
if (*flags & MS_RDONLY) {
|
| 463 |
|
|
sb->s_dirt = 1;
|
| 464 |
|
|
while (sb->s_dirt)
|
| 465 |
|
|
affs_write_super(sb);
|
| 466 |
|
|
sb->s_flags |= MS_RDONLY;
|
| 467 |
|
|
} else if (!(AFFS_SB->s_flags & SF_READONLY)) {
|
| 468 |
|
|
sb->s_flags &= ~MS_RDONLY;
|
| 469 |
|
|
} else {
|
| 470 |
|
|
affs_warning(sb,"remount","Cannot remount fs read/write because of errors");
|
| 471 |
|
|
return -EINVAL;
|
| 472 |
|
|
}
|
| 473 |
|
|
return 0;
|
| 474 |
|
|
}
|
| 475 |
|
|
|
| 476 |
|
|
static int
|
| 477 |
|
|
affs_statfs(struct super_block *sb, struct statfs *buf)
|
| 478 |
|
|
{
|
| 479 |
|
|
int free;
|
| 480 |
|
|
|
| 481 |
|
|
pr_debug("AFFS: statfs() partsize=%d, reserved=%d\n",AFFS_SB->s_partition_size,
|
| 482 |
|
|
AFFS_SB->s_reserved);
|
| 483 |
|
|
|
| 484 |
|
|
free = affs_count_free_blocks(sb);
|
| 485 |
|
|
buf->f_type = AFFS_SUPER_MAGIC;
|
| 486 |
|
|
buf->f_bsize = sb->s_blocksize;
|
| 487 |
|
|
buf->f_blocks = AFFS_SB->s_partition_size - AFFS_SB->s_reserved;
|
| 488 |
|
|
buf->f_bfree = free;
|
| 489 |
|
|
buf->f_bavail = free;
|
| 490 |
|
|
return 0;
|
| 491 |
|
|
}
|
| 492 |
|
|
|
| 493 |
|
|
static DECLARE_FSTYPE_DEV(affs_fs_type, "affs", affs_read_super);
|
| 494 |
|
|
|
| 495 |
|
|
static int __init init_affs_fs(void)
|
| 496 |
|
|
{
|
| 497 |
|
|
return register_filesystem(&affs_fs_type);
|
| 498 |
|
|
}
|
| 499 |
|
|
|
| 500 |
|
|
static void __exit exit_affs_fs(void)
|
| 501 |
|
|
{
|
| 502 |
|
|
unregister_filesystem(&affs_fs_type);
|
| 503 |
|
|
}
|
| 504 |
|
|
|
| 505 |
|
|
EXPORT_NO_SYMBOLS;
|
| 506 |
|
|
|
| 507 |
|
|
MODULE_DESCRIPTION("Amiga filesystem support for Linux");
|
| 508 |
|
|
MODULE_LICENSE("GPL");
|
| 509 |
|
|
|
| 510 |
|
|
module_init(init_affs_fs)
|
| 511 |
|
|
module_exit(exit_affs_fs)
|
