diff options
Diffstat (limited to 'lib/libzfs/libzfs_pool.c')
| -rw-r--r-- | lib/libzfs/libzfs_pool.c | 403 |
1 files changed, 1 insertions, 402 deletions
diff --git a/lib/libzfs/libzfs_pool.c b/lib/libzfs/libzfs_pool.c index fca1a4178..128c6efe9 100644 --- a/lib/libzfs/libzfs_pool.c +++ b/lib/libzfs/libzfs_pool.c @@ -29,10 +29,8 @@ * Copyright (c) 2017, Intel Corporation. */ -#include <ctype.h> #include <errno.h> #include <devid.h> -#include <fcntl.h> #include <libintl.h> #include <stdio.h> #include <stdlib.h> @@ -47,6 +45,7 @@ #include <sys/zfs_ioctl.h> #include <sys/vdev_disk.h> #include <dlfcn.h> +#include <libzutil.h> #include "zfs_namecheck.h" #include "zfs_prop.h" @@ -3697,80 +3696,6 @@ set_path(zpool_handle_t *zhp, nvlist_t *nv, const char *path) } #endif /* sun */ -/* - * Remove partition suffix from a vdev path. Partition suffixes may take three - * forms: "-partX", "pX", or "X", where X is a string of digits. The second - * case only occurs when the suffix is preceded by a digit, i.e. "md0p0" The - * third case only occurs when preceded by a string matching the regular - * expression "^([hsv]|xv)d[a-z]+", i.e. a scsi, ide, virtio or xen disk. - * - * caller must free the returned string - */ -char * -zfs_strip_partition(char *path) -{ - char *tmp = strdup(path); - char *part = NULL, *d = NULL; - if (!tmp) - return (NULL); - - if ((part = strstr(tmp, "-part")) && part != tmp) { - d = part + 5; - } else if ((part = strrchr(tmp, 'p')) && - part > tmp + 1 && isdigit(*(part-1))) { - d = part + 1; - } else if ((tmp[0] == 'h' || tmp[0] == 's' || tmp[0] == 'v') && - tmp[1] == 'd') { - for (d = &tmp[2]; isalpha(*d); part = ++d) { } - } else if (strncmp("xvd", tmp, 3) == 0) { - for (d = &tmp[3]; isalpha(*d); part = ++d) { } - } - if (part && d && *d != '\0') { - for (; isdigit(*d); d++) { } - if (*d == '\0') - *part = '\0'; - } - - return (tmp); -} - -/* - * Same as zfs_strip_partition, but allows "/dev/" to be in the pathname - * - * path: /dev/sda1 - * returns: /dev/sda - * - * Returned string must be freed. - */ -char * -zfs_strip_partition_path(char *path) -{ - char *newpath = strdup(path); - char *sd_offset; - char *new_sd; - - if (!newpath) - return (NULL); - - /* Point to "sda1" part of "/dev/sda1" */ - sd_offset = strrchr(newpath, '/') + 1; - - /* Get our new name "sda" */ - new_sd = zfs_strip_partition(sd_offset); - if (!new_sd) { - free(newpath); - return (NULL); - } - - /* Paste the "sda" where "sda1" was */ - strlcpy(sd_offset, new_sd, strlen(sd_offset) + 1); - - /* Free temporary "sda" */ - free(new_sd); - - return (newpath); -} - #define PATH_BUF_LEN 64 /* @@ -4134,54 +4059,6 @@ get_history(zpool_handle_t *zhp, char *buf, uint64_t *off, uint64_t *len) } /* - * Process the buffer of nvlists, unpacking and storing each nvlist record - * into 'records'. 'leftover' is set to the number of bytes that weren't - * processed as there wasn't a complete record. - */ -int -zpool_history_unpack(char *buf, uint64_t bytes_read, uint64_t *leftover, - nvlist_t ***records, uint_t *numrecords) -{ - uint64_t reclen; - nvlist_t *nv; - int i; - void *tmp; - - while (bytes_read > sizeof (reclen)) { - - /* get length of packed record (stored as little endian) */ - for (i = 0, reclen = 0; i < sizeof (reclen); i++) - reclen += (uint64_t)(((uchar_t *)buf)[i]) << (8*i); - - if (bytes_read < sizeof (reclen) + reclen) - break; - - /* unpack record */ - if (nvlist_unpack(buf + sizeof (reclen), reclen, &nv, 0) != 0) - return (ENOMEM); - bytes_read -= sizeof (reclen) + reclen; - buf += sizeof (reclen) + reclen; - - /* add record to nvlist array */ - (*numrecords)++; - if (ISP2(*numrecords + 1)) { - tmp = realloc(*records, - *numrecords * 2 * sizeof (nvlist_t *)); - if (tmp == NULL) { - nvlist_free(nv); - (*numrecords)--; - return (ENOMEM); - } - *records = tmp; - } - (*records)[*numrecords - 1] = nv; - } - - *leftover = bytes_read; - return (0); -} - -/* * Retrieve the command history of a pool. */ int @@ -4669,281 +4546,3 @@ zpool_label_disk(libzfs_handle_t *hdl, zpool_handle_t *zhp, char *name) return (0); } - -/* - * Allocate and return the underlying device name for a device mapper device. - * If a device mapper device maps to multiple devices, return the first device. - * - * For example, dm_name = "/dev/dm-0" could return "/dev/sda". Symlinks to a - * DM device (like /dev/disk/by-vdev/A0) are also allowed. - * - * Returns device name, or NULL on error or no match. If dm_name is not a DM - * device then return NULL. - * - * NOTE: The returned name string must be *freed*. - */ -char * -dm_get_underlying_path(char *dm_name) -{ - DIR *dp = NULL; - struct dirent *ep; - char *realp; - char *tmp = NULL; - char *path = NULL; - char *dev_str; - int size; - - if (dm_name == NULL) - return (NULL); - - /* dm name may be a symlink (like /dev/disk/by-vdev/A0) */ - realp = realpath(dm_name, NULL); - if (realp == NULL) - return (NULL); - - /* - * If they preface 'dev' with a path (like "/dev") then strip it off. - * We just want the 'dm-N' part. - */ - tmp = strrchr(realp, '/'); - if (tmp != NULL) - dev_str = tmp + 1; /* +1 since we want the chr after '/' */ - else - dev_str = tmp; - - size = asprintf(&tmp, "/sys/block/%s/slaves/", dev_str); - if (size == -1 || !tmp) - goto end; - - dp = opendir(tmp); - if (dp == NULL) - goto end; - - /* Return first sd* entry in /sys/block/dm-N/slaves/ */ - while ((ep = readdir(dp))) { - if (ep->d_type != DT_DIR) { /* skip "." and ".." dirs */ - size = asprintf(&path, "/dev/%s", ep->d_name); - break; - } - } - -end: - if (dp != NULL) - closedir(dp); - free(tmp); - free(realp); - return (path); -} - -/* - * Return 1 if device is a device mapper or multipath device. - * Return 0 if not. - */ -int -zfs_dev_is_dm(char *dev_name) -{ - - char *tmp; - tmp = dm_get_underlying_path(dev_name); - if (tmp == NULL) - return (0); - - free(tmp); - return (1); -} - -/* - * By "whole disk" we mean an entire physical disk (something we can - * label, toggle the write cache on, etc.) as opposed to the full - * capacity of a pseudo-device such as lofi or did. We act as if we - * are labeling the disk, which should be a pretty good test of whether - * it's a viable device or not. Returns B_TRUE if it is and B_FALSE if - * it isn't. - */ -int -zfs_dev_is_whole_disk(char *dev_name) -{ - struct dk_gpt *label; - int fd; - - if ((fd = open(dev_name, O_RDONLY | O_DIRECT)) < 0) - return (0); - - if (efi_alloc_and_init(fd, EFI_NUMPAR, &label) != 0) { - (void) close(fd); - return (0); - } - - efi_free(label); - (void) close(fd); - - return (1); -} - -/* - * Lookup the underlying device for a device name - * - * Often you'll have a symlink to a device, a partition device, - * or a multipath device, and want to look up the underlying device. - * This function returns the underlying device name. If the device - * name is already the underlying device, then just return the same - * name. If the device is a DM device with multiple underlying devices - * then return the first one. - * - * For example: - * - * 1. /dev/disk/by-id/ata-QEMU_HARDDISK_QM00001 -> ../../sda - * dev_name: /dev/disk/by-id/ata-QEMU_HARDDISK_QM00001 - * returns: /dev/sda - * - * 2. /dev/mapper/mpatha (made up of /dev/sda and /dev/sdb) - * dev_name: /dev/mapper/mpatha - * returns: /dev/sda (first device) - * - * 3. /dev/sda (already the underlying device) - * dev_name: /dev/sda - * returns: /dev/sda - * - * 4. /dev/dm-3 (mapped to /dev/sda) - * dev_name: /dev/dm-3 - * returns: /dev/sda - * - * 5. /dev/disk/by-id/scsi-0QEMU_drive-scsi0-0-0-0-part9 -> ../../sdb9 - * dev_name: /dev/disk/by-id/scsi-0QEMU_drive-scsi0-0-0-0-part9 - * returns: /dev/sdb - * - * 6. /dev/disk/by-uuid/5df030cf-3cd9-46e4-8e99-3ccb462a4e9a -> ../dev/sda2 - * dev_name: /dev/disk/by-uuid/5df030cf-3cd9-46e4-8e99-3ccb462a4e9a - * returns: /dev/sda - * - * Returns underlying device name, or NULL on error or no match. - * - * NOTE: The returned name string must be *freed*. - */ -char * -zfs_get_underlying_path(char *dev_name) -{ - char *name = NULL; - char *tmp; - - if (dev_name == NULL) - return (NULL); - - tmp = dm_get_underlying_path(dev_name); - - /* dev_name not a DM device, so just un-symlinkize it */ - if (tmp == NULL) - tmp = realpath(dev_name, NULL); - - if (tmp != NULL) { - name = zfs_strip_partition_path(tmp); - free(tmp); - } - - return (name); -} - -/* - * Given a dev name like "sda", return the full enclosure sysfs path to - * the disk. You can also pass in the name with "/dev" prepended - * to it (like /dev/sda). - * - * For example, disk "sda" in enclosure slot 1: - * dev: "sda" - * returns: "/sys/class/enclosure/1:0:3:0/Slot 1" - * - * 'dev' must be a non-devicemapper device. - * - * Returned string must be freed. - */ -char * -zfs_get_enclosure_sysfs_path(char *dev_name) -{ - DIR *dp = NULL; - struct dirent *ep; - char buf[MAXPATHLEN]; - char *tmp1 = NULL; - char *tmp2 = NULL; - char *tmp3 = NULL; - char *path = NULL; - size_t size; - int tmpsize; - - if (dev_name == NULL) - return (NULL); - - /* If they preface 'dev' with a path (like "/dev") then strip it off */ - tmp1 = strrchr(dev_name, '/'); - if (tmp1 != NULL) - dev_name = tmp1 + 1; /* +1 since we want the chr after '/' */ - - tmpsize = asprintf(&tmp1, "/sys/block/%s/device", dev_name); - if (tmpsize == -1 || tmp1 == NULL) { - tmp1 = NULL; - goto end; - } - - dp = opendir(tmp1); - if (dp == NULL) { - tmp1 = NULL; /* To make free() at the end a NOP */ - goto end; - } - - /* - * Look though all sysfs entries in /sys/block/<dev>/device for - * the enclosure symlink. - */ - while ((ep = readdir(dp))) { - /* Ignore everything that's not our enclosure_device link */ - if (strstr(ep->d_name, "enclosure_device") == NULL) - continue; - - if (asprintf(&tmp2, "%s/%s", tmp1, ep->d_name) == -1 || - tmp2 == NULL) - break; - - size = readlink(tmp2, buf, sizeof (buf)); - - /* Did readlink fail or crop the link name? */ - if (size == -1 || size >= sizeof (buf)) { - free(tmp2); - tmp2 = NULL; /* To make free() at the end a NOP */ - break; - } - - /* - * We got a valid link. readlink() doesn't terminate strings - * so we have to do it. - */ - buf[size] = '\0'; - - /* - * Our link will look like: - * - * "../../../../port-11:1:2/..STUFF../enclosure/1:0:3:0/SLOT 1" - * - * We want to grab the "enclosure/1:0:3:0/SLOT 1" part - */ - tmp3 = strstr(buf, "enclosure"); - if (tmp3 == NULL) - break; - - if (asprintf(&path, "/sys/class/%s", tmp3) == -1) { - /* If asprintf() fails, 'path' is undefined */ - path = NULL; - break; - } - - if (path == NULL) - break; - } - -end: - free(tmp2); - free(tmp1); - - if (dp != NULL) - closedir(dp); - - return (path); -} |