shmem.c (5f00110f7273f9ff04ac69a5f85bb535a4fd0987) shmem.c (49cd0a5c290f99deca3463d16c3c1c7240107889)
1/*
2 * Resizable virtual memory filesystem for Linux.
3 *
4 * Copyright (C) 2000 Linus Torvalds.
5 * 2000 Transmeta Corp.
6 * 2000-2001 Christoph Rohland
7 * 2000-2001 SAP AG
8 * 2002 Red Hat Inc.

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2380 .encode_fh = shmem_encode_fh,
2381 .fh_to_dentry = shmem_fh_to_dentry,
2382};
2383
2384static int shmem_parse_options(char *options, struct shmem_sb_info *sbinfo,
2385 bool remount)
2386{
2387 char *this_char, *value, *rest;
1/*
2 * Resizable virtual memory filesystem for Linux.
3 *
4 * Copyright (C) 2000 Linus Torvalds.
5 * 2000 Transmeta Corp.
6 * 2000-2001 Christoph Rohland
7 * 2000-2001 SAP AG
8 * 2002 Red Hat Inc.

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2380 .encode_fh = shmem_encode_fh,
2381 .fh_to_dentry = shmem_fh_to_dentry,
2382};
2383
2384static int shmem_parse_options(char *options, struct shmem_sb_info *sbinfo,
2385 bool remount)
2386{
2387 char *this_char, *value, *rest;
2388 struct mempolicy *mpol = NULL;
2388 uid_t uid;
2389 gid_t gid;
2390
2391 while (options != NULL) {
2392 this_char = options;
2393 for (;;) {
2394 /*
2395 * NUL-terminate this option: unfortunately,

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2408 if (!*this_char)
2409 continue;
2410 if ((value = strchr(this_char,'=')) != NULL) {
2411 *value++ = 0;
2412 } else {
2413 printk(KERN_ERR
2414 "tmpfs: No value for mount option '%s'\n",
2415 this_char);
2389 uid_t uid;
2390 gid_t gid;
2391
2392 while (options != NULL) {
2393 this_char = options;
2394 for (;;) {
2395 /*
2396 * NUL-terminate this option: unfortunately,

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2409 if (!*this_char)
2410 continue;
2411 if ((value = strchr(this_char,'=')) != NULL) {
2412 *value++ = 0;
2413 } else {
2414 printk(KERN_ERR
2415 "tmpfs: No value for mount option '%s'\n",
2416 this_char);
2416 return 1;
2417 goto error;
2417 }
2418
2419 if (!strcmp(this_char,"size")) {
2420 unsigned long long size;
2421 size = memparse(value,&rest);
2422 if (*rest == '%') {
2423 size <<= PAGE_SHIFT;
2424 size *= totalram_pages;

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2457 continue;
2458 gid = simple_strtoul(value, &rest, 0);
2459 if (*rest)
2460 goto bad_val;
2461 sbinfo->gid = make_kgid(current_user_ns(), gid);
2462 if (!gid_valid(sbinfo->gid))
2463 goto bad_val;
2464 } else if (!strcmp(this_char,"mpol")) {
2418 }
2419
2420 if (!strcmp(this_char,"size")) {
2421 unsigned long long size;
2422 size = memparse(value,&rest);
2423 if (*rest == '%') {
2424 size <<= PAGE_SHIFT;
2425 size *= totalram_pages;

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2458 continue;
2459 gid = simple_strtoul(value, &rest, 0);
2460 if (*rest)
2461 goto bad_val;
2462 sbinfo->gid = make_kgid(current_user_ns(), gid);
2463 if (!gid_valid(sbinfo->gid))
2464 goto bad_val;
2465 } else if (!strcmp(this_char,"mpol")) {
2465 if (mpol_parse_str(value, &sbinfo->mpol))
2466 mpol_put(mpol);
2467 mpol = NULL;
2468 if (mpol_parse_str(value, &mpol))
2466 goto bad_val;
2467 } else {
2468 printk(KERN_ERR "tmpfs: Bad mount option %s\n",
2469 this_char);
2469 goto bad_val;
2470 } else {
2471 printk(KERN_ERR "tmpfs: Bad mount option %s\n",
2472 this_char);
2470 return 1;
2473 goto error;
2471 }
2472 }
2474 }
2475 }
2476 sbinfo->mpol = mpol;
2473 return 0;
2474
2475bad_val:
2476 printk(KERN_ERR "tmpfs: Bad value '%s' for mount option '%s'\n",
2477 value, this_char);
2477 return 0;
2478
2479bad_val:
2480 printk(KERN_ERR "tmpfs: Bad value '%s' for mount option '%s'\n",
2481 value, this_char);
2482error:
2483 mpol_put(mpol);
2478 return 1;
2479
2480}
2481
2482static int shmem_remount_fs(struct super_block *sb, int *flags, char *data)
2483{
2484 struct shmem_sb_info *sbinfo = SHMEM_SB(sb);
2485 struct shmem_sb_info config = *sbinfo;

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2545}
2546#endif /* CONFIG_TMPFS */
2547
2548static void shmem_put_super(struct super_block *sb)
2549{
2550 struct shmem_sb_info *sbinfo = SHMEM_SB(sb);
2551
2552 percpu_counter_destroy(&sbinfo->used_blocks);
2484 return 1;
2485
2486}
2487
2488static int shmem_remount_fs(struct super_block *sb, int *flags, char *data)
2489{
2490 struct shmem_sb_info *sbinfo = SHMEM_SB(sb);
2491 struct shmem_sb_info config = *sbinfo;

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2551}
2552#endif /* CONFIG_TMPFS */
2553
2554static void shmem_put_super(struct super_block *sb)
2555{
2556 struct shmem_sb_info *sbinfo = SHMEM_SB(sb);
2557
2558 percpu_counter_destroy(&sbinfo->used_blocks);
2559 mpol_put(sbinfo->mpol);
2553 kfree(sbinfo);
2554 sb->s_fs_info = NULL;
2555}
2556
2557int shmem_fill_super(struct super_block *sb, void *data, int silent)
2558{
2559 struct inode *inode;
2560 struct shmem_sb_info *sbinfo;

--- 434 unchanged lines hidden --- 		2560 kfree(sbinfo);
2561 sb->s_fs_info = NULL;
2562}
2563
2564int shmem_fill_super(struct super_block *sb, void *data, int silent)
2565{
2566 struct inode *inode;
2567 struct shmem_sb_info *sbinfo;

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