#include <sys/vfs.h>
#include <sys/statfs.h>
#include <linux/magic.h>
-#include <sys/utsname.h>
-#include <linux/version.h>
+#include <getopt.h>
#include "kerncompat.h"
#include "radix-tree.h"
#include "volumes.h"
#include "ioctl.h"
#include "commands.h"
-#include "fsfeatures.h"
+#include "mkfs/common.h"
#ifndef BLKDISCARD
#define BLKDISCARD _IO(0x12,119)
return unique;
}
-/*
- * Insert a root item for temporary tree root
- *
- * Only used in make_btrfs_v2().
- */
-#define VERSION_TO_STRING3(a,b,c) #a "." #b "." #c, KERNEL_VERSION(a,b,c)
-#define VERSION_TO_STRING2(a,b) #a "." #b, KERNEL_VERSION(a,b,0)
-
-/*
- * Feature stability status and versions: compat <= safe <= default
- */
-static const struct btrfs_fs_feature {
- const char *name;
- u64 flag;
- const char *sysfs_name;
- /*
- * Compatibility with kernel of given version. Filesystem can be
- * mounted.
- */
- const char *compat_str;
- u32 compat_ver;
- /*
- * Considered safe for use, but is not on by default, even if the
- * kernel supports the feature.
- */
- const char *safe_str;
- u32 safe_ver;
- /*
- * Considered safe for use and will be turned on by default if
- * supported by the running kernel.
- */
- const char *default_str;
- u32 default_ver;
- const char *desc;
-} mkfs_features[] = {
- { "mixed-bg", BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS,
- "mixed_groups",
- VERSION_TO_STRING3(2,6,37),
- VERSION_TO_STRING3(2,6,37),
- NULL, 0,
- "mixed data and metadata block groups" },
- { "extref", BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF,
- "extended_iref",
- VERSION_TO_STRING2(3,7),
- VERSION_TO_STRING2(3,12),
- VERSION_TO_STRING2(3,12),
- "increased hardlink limit per file to 65536" },
- { "raid56", BTRFS_FEATURE_INCOMPAT_RAID56,
- "raid56",
- VERSION_TO_STRING2(3,9),
- NULL, 0,
- NULL, 0,
- "raid56 extended format" },
- { "skinny-metadata", BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA,
- "skinny_metadata",
- VERSION_TO_STRING2(3,10),
- VERSION_TO_STRING2(3,18),
- VERSION_TO_STRING2(3,18),
- "reduced-size metadata extent refs" },
- { "no-holes", BTRFS_FEATURE_INCOMPAT_NO_HOLES,
- "no_holes",
- VERSION_TO_STRING2(3,14),
- VERSION_TO_STRING2(4,0),
- NULL, 0,
- "no explicit hole extents for files" },
- /* Keep this one last */
- { "list-all", BTRFS_FEATURE_LIST_ALL, NULL }
-};
-
-static int parse_one_fs_feature(const char *name, u64 *flags)
-{
- int i;
- int found = 0;
-
- for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
- if (name[0] == '^' &&
- !strcmp(mkfs_features[i].name, name + 1)) {
- *flags &= ~ mkfs_features[i].flag;
- found = 1;
- } else if (!strcmp(mkfs_features[i].name, name)) {
- *flags |= mkfs_features[i].flag;
- found = 1;
- }
- }
-
- return !found;
-}
-
-void btrfs_parse_features_to_string(char *buf, u64 flags)
-{
- int i;
-
- buf[0] = 0;
-
- for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
- if (flags & mkfs_features[i].flag) {
- if (*buf)
- strcat(buf, ", ");
- strcat(buf, mkfs_features[i].name);
- }
- }
-}
-
-void btrfs_process_fs_features(u64 flags)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
- if (flags & mkfs_features[i].flag) {
- printf("Turning ON incompat feature '%s': %s\n",
- mkfs_features[i].name,
- mkfs_features[i].desc);
- }
- }
-}
-
-void btrfs_list_all_fs_features(u64 mask_disallowed)
-{
- int i;
-
- fprintf(stderr, "Filesystem features available:\n");
- for (i = 0; i < ARRAY_SIZE(mkfs_features) - 1; i++) {
- const struct btrfs_fs_feature *feat = &mkfs_features[i];
-
- if (feat->flag & mask_disallowed)
- continue;
- fprintf(stderr, "%-20s- %s (0x%llx", feat->name, feat->desc,
- feat->flag);
- if (feat->compat_ver)
- fprintf(stderr, ", compat=%s", feat->compat_str);
- if (feat->safe_ver)
- fprintf(stderr, ", safe=%s", feat->safe_str);
- if (feat->default_ver)
- fprintf(stderr, ", default=%s", feat->default_str);
- fprintf(stderr, ")\n");
- }
-}
-
-/*
- * Return NULL if all features were parsed fine, otherwise return the name of
- * the first unparsed.
- */
-char* btrfs_parse_fs_features(char *namelist, u64 *flags)
-{
- char *this_char;
- char *save_ptr = NULL; /* Satisfy static checkers */
-
- for (this_char = strtok_r(namelist, ",", &save_ptr);
- this_char != NULL;
- this_char = strtok_r(NULL, ",", &save_ptr)) {
- if (parse_one_fs_feature(this_char, flags))
- return this_char;
- }
-
- return NULL;
-}
-
-void print_kernel_version(FILE *stream, u32 version)
-{
- u32 v[3];
-
- v[0] = version & 0xFF;
- v[1] = (version >> 8) & 0xFF;
- v[2] = version >> 16;
- fprintf(stream, "%u.%u", v[2], v[1]);
- if (v[0])
- fprintf(stream, ".%u", v[0]);
-}
-
-u32 get_running_kernel_version(void)
-{
- struct utsname utsbuf;
- char *tmp;
- char *saveptr = NULL;
- u32 version;
-
- uname(&utsbuf);
- if (strcmp(utsbuf.sysname, "Linux") != 0) {
- error("unsupported system: %s", utsbuf.sysname);
- exit(1);
- }
- /* 1.2.3-4-name */
- tmp = strchr(utsbuf.release, '-');
- if (tmp)
- *tmp = 0;
-
- tmp = strtok_r(utsbuf.release, ".", &saveptr);
- if (!string_is_numerical(tmp))
- return (u32)-1;
- version = atoi(tmp) << 16;
- tmp = strtok_r(NULL, ".", &saveptr);
- if (!string_is_numerical(tmp))
- return (u32)-1;
- version |= atoi(tmp) << 8;
- tmp = strtok_r(NULL, ".", &saveptr);
- if (tmp) {
- if (!string_is_numerical(tmp))
- return (u32)-1;
- version |= atoi(tmp);
- }
-
- return version;
-}
-
u64 btrfs_device_size(int fd, struct stat *st)
{
u64 size;
return ret;
}
-#define isoctal(c) (((c) & ~7) == '0')
-
-static inline void translate(char *f, char *t)
-{
- while (*f != '\0') {
- if (*f == '\\' &&
- isoctal(f[1]) && isoctal(f[2]) && isoctal(f[3])) {
- *t++ = 64*(f[1] & 7) + 8*(f[2] & 7) + (f[3] & 7);
- f += 4;
- } else
- *t++ = *f++;
- }
- *t = '\0';
- return;
-}
-
-/*
- * Checks if the swap device.
- * Returns 1 if swap device, < 0 on error or 0 if not swap device.
- */
-static int is_swap_device(const char *file)
-{
- FILE *f;
- struct stat st_buf;
- dev_t dev;
- ino_t ino = 0;
- char tmp[PATH_MAX];
- char buf[PATH_MAX];
- char *cp;
- int ret = 0;
-
- if (stat(file, &st_buf) < 0)
- return -errno;
- if (S_ISBLK(st_buf.st_mode))
- dev = st_buf.st_rdev;
- else if (S_ISREG(st_buf.st_mode)) {
- dev = st_buf.st_dev;
- ino = st_buf.st_ino;
- } else
- return 0;
-
- if ((f = fopen("/proc/swaps", "r")) == NULL)
- return 0;
-
- /* skip the first line */
- if (fgets(tmp, sizeof(tmp), f) == NULL)
- goto out;
-
- while (fgets(tmp, sizeof(tmp), f) != NULL) {
- if ((cp = strchr(tmp, ' ')) != NULL)
- *cp = '\0';
- if ((cp = strchr(tmp, '\t')) != NULL)
- *cp = '\0';
- translate(tmp, buf);
- if (stat(buf, &st_buf) != 0)
- continue;
- if (S_ISBLK(st_buf.st_mode)) {
- if (dev == st_buf.st_rdev) {
- ret = 1;
- break;
- }
- } else if (S_ISREG(st_buf.st_mode)) {
- if (dev == st_buf.st_dev && ino == st_buf.st_ino) {
- ret = 1;
- break;
- }
- }
- }
-
-out:
- fclose(f);
-
- return ret;
-}
-
-/*
- * Check for existing filesystem or partition table on device.
- * Returns:
- * 1 for existing fs or partition
- * 0 for nothing found
- * -1 for internal error
- */
-static int check_overwrite(const char *device)
-{
- const char *type;
- blkid_probe pr = NULL;
- int ret;
- blkid_loff_t size;
-
- if (!device || !*device)
- return 0;
-
- ret = -1; /* will reset on success of all setup calls */
-
- pr = blkid_new_probe_from_filename(device);
- if (!pr)
- goto out;
-
- size = blkid_probe_get_size(pr);
- if (size < 0)
- goto out;
-
- /* nothing to overwrite on a 0-length device */
- if (size == 0) {
- ret = 0;
- goto out;
- }
-
- ret = blkid_probe_enable_partitions(pr, 1);
- if (ret < 0)
- goto out;
-
- ret = blkid_do_fullprobe(pr);
- if (ret < 0)
- goto out;
-
- /*
- * Blkid returns 1 for nothing found and 0 when it finds a signature,
- * but we want the exact opposite, so reverse the return value here.
- *
- * In addition print some useful diagnostics about what actually is
- * on the device.
- */
- if (ret) {
- ret = 0;
- goto out;
- }
-
- if (!blkid_probe_lookup_value(pr, "TYPE", &type, NULL)) {
- fprintf(stderr,
- "%s appears to contain an existing "
- "filesystem (%s).\n", device, type);
- } else if (!blkid_probe_lookup_value(pr, "PTTYPE", &type, NULL)) {
- fprintf(stderr,
- "%s appears to contain a partition "
- "table (%s).\n", device, type);
- } else {
- fprintf(stderr,
- "%s appears to contain something weird "
- "according to blkid\n", device);
- }
- ret = 1;
-
-out:
- if (pr)
- blkid_free_probe(pr);
- if (ret == -1)
- fprintf(stderr,
- "probe of %s failed, cannot detect "
- "existing filesystem.\n", device);
- return ret;
-}
-
static int group_profile_devs_min(u64 flag)
{
switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
}
}
-/*
- * Check if a device is suitable for btrfs
- * returns:
- * 1: something is wrong, an error is printed
- * 0: all is fine
- */
-int test_dev_for_mkfs(const char *file, int force_overwrite)
-{
- int ret, fd;
- struct stat st;
-
- ret = is_swap_device(file);
- if (ret < 0) {
- error("checking status of %s: %s", file, strerror(-ret));
- return 1;
- }
- if (ret == 1) {
- error("%s is a swap device", file);
- return 1;
- }
- if (!force_overwrite) {
- if (check_overwrite(file)) {
- error("use the -f option to force overwrite of %s",
- file);
- return 1;
- }
- }
- ret = check_mounted(file);
- if (ret < 0) {
- error("cannot check mount status of %s: %s", file,
- strerror(-ret));
- return 1;
- }
- if (ret == 1) {
- error("%s is mounted", file);
- return 1;
- }
- /* check if the device is busy */
- fd = open(file, O_RDWR|O_EXCL);
- if (fd < 0) {
- error("unable to open %s: %s", file, strerror(errno));
- return 1;
- }
- if (fstat(fd, &st)) {
- error("unable to stat %s: %s", file, strerror(errno));
- close(fd);
- return 1;
- }
- if (!S_ISBLK(st.st_mode)) {
- error("%s is not a block device", file);
- close(fd);
- return 1;
- }
- close(fd);
- return 0;
-}
-
int btrfs_scan_devices(void)
{
int fd = -1;
return 0;
}
-int is_vol_small(const char *file)
-{
- int fd = -1;
- int e;
- struct stat st;
- u64 size;
-
- fd = open(file, O_RDONLY);
- if (fd < 0)
- return -errno;
- if (fstat(fd, &st) < 0) {
- e = -errno;
- close(fd);
- return e;
- }
- size = btrfs_device_size(fd, &st);
- if (size == 0) {
- close(fd);
- return -1;
- }
- if (size < BTRFS_MKFS_SMALL_VOLUME_SIZE) {
- close(fd);
- return 1;
- } else {
- close(fd);
- return 0;
- }
-}
-
/*
* This reads a line from the stdin and only returns non-zero if the
* first whitespace delimited token is a case insensitive match with yes
return ret;
}
-int test_minimum_size(const char *file, u32 nodesize)
-{
- int fd;
- struct stat statbuf;
-
- fd = open(file, O_RDONLY);
- if (fd < 0)
- return -errno;
- if (stat(file, &statbuf) < 0) {
- close(fd);
- return -errno;
- }
- if (btrfs_device_size(fd, &statbuf) < btrfs_min_dev_size(nodesize)) {
- close(fd);
- return 1;
- }
- close(fd);
- return 0;
-}
-
-
/*
* Test if path is a directory
* Returns:
return unit_mode;
}
+u64 div_factor(u64 num, int factor)
+{
+ if (factor == 10)
+ return num;
+ num *= factor;
+ num /= 10;
+ return num;
+}
+/*
+ * Get the length of the string converted from a u64 number.
+ *
+ * Result is equal to log10(num) + 1, but without the use of math library.
+ */
+int count_digits(u64 num)
+{
+ int ret = 0;
+
+ if (num == 0)
+ return 1;
+ while (num > 0) {
+ ret++;
+ num /= 10;
+ }
+ return ret;
+}
+
int string_is_numerical(const char *str)
{
if (!str)
return 1;
}
+int prefixcmp(const char *str, const char *prefix)
+{
+ for (; ; str++, prefix++)
+ if (!*prefix)
+ return 0;
+ else if (*str != *prefix)
+ return (unsigned char)*prefix - (unsigned char)*str;
+}
+
/* Subvolume helper functions */
/*
* test if name is a correct subvolume name
return ret;
}
+/* Set the seed manually */
void init_rand_seed(u64 seed)
{
int i;
return (u32)jrand48(rand_seed);
}
+/* Return random number in range [0, upper) */
unsigned int rand_range(unsigned int upper)
{
__init_seed();
return (unsigned int)(jrand48(rand_seed) % upper);
}
+int rand_int(void)
+{
+ return (int)(rand_u32());
+}
+
+u64 rand_u64(void)
+{
+ u64 ret = 0;
+
+ ret += rand_u32();
+ ret <<= 32;
+ ret += rand_u32();
+ return ret;
+}
+
+u16 rand_u16(void)
+{
+ return (u16)(rand_u32());
+}
+
+u8 rand_u8(void)
+{
+ return (u8)(rand_u32());
+}
+
void btrfs_config_init(void)
{
}
projects / platform / upstream / btrfs-progs.git / blobdiff