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Diffstat (limited to 'lib/libefi/rdwr_efi.c')
-rw-r--r--lib/libefi/rdwr_efi.c384
1 files changed, 329 insertions, 55 deletions
diff --git a/lib/libefi/rdwr_efi.c b/lib/libefi/rdwr_efi.c
index e682b840a..da71e3486 100644
--- a/lib/libefi/rdwr_efi.c
+++ b/lib/libefi/rdwr_efi.c
@@ -29,6 +29,7 @@
#include <strings.h>
#include <unistd.h>
#include <uuid/uuid.h>
+#include <zlib.h>
#include <libintl.h>
#include <sys/types.h>
#include <sys/dkio.h>
@@ -38,7 +39,9 @@
#include <sys/dktp/fdisk.h>
#include <sys/efi_partition.h>
#include <sys/byteorder.h>
-#include <sys/ddi.h>
+#if defined(__linux__)
+#include <linux/fs.h>
+#endif
static struct uuid_to_ptag {
struct uuid uuid;
@@ -49,11 +52,11 @@ static struct uuid_to_ptag {
{ EFI_SWAP },
{ EFI_USR },
{ EFI_BACKUP },
- { 0 }, /* STAND is never used */
+ { EFI_UNUSED }, /* STAND is never used */
{ EFI_VAR },
{ EFI_HOME },
{ EFI_ALTSCTR },
- { 0 }, /* CACHE (cachefs) is never used */
+ { EFI_UNUSED }, /* CACHE (cachefs) is never used */
{ EFI_RESERVED },
{ EFI_SYSTEM },
{ EFI_LEGACY_MBR },
@@ -107,19 +110,142 @@ int efi_debug = 1;
int efi_debug = 0;
#endif
-extern unsigned int efi_crc32(const unsigned char *, unsigned int);
-static int efi_read(int, struct dk_gpt *);
+static int efi_read(int, struct dk_gpt *);
+
+/*
+ * Return a 32-bit CRC of the contents of the buffer. Pre-and-post
+ * one's conditioning will be handled by crc32() internally.
+ */
+static uint32_t
+efi_crc32(const unsigned char *buf, unsigned int size)
+{
+ uint32_t crc = crc32(0, Z_NULL, 0);
+
+ crc = crc32(crc, buf, size);
+
+ return (crc);
+}
static int
read_disk_info(int fd, diskaddr_t *capacity, uint_t *lbsize)
{
- struct dk_minfo disk_info;
+ int sector_size;
+ unsigned long long capacity_size;
+
+ if (ioctl(fd, BLKSSZGET, &sector_size) < 0)
+ return (-1);
+
+ if (ioctl(fd, BLKGETSIZE64, &capacity_size) < 0)
+ return (-1);
+
+ *lbsize = (uint_t)sector_size;
+ *capacity = (diskaddr_t)(capacity_size / sector_size);
+
+ return (0);
+}
- if ((ioctl(fd, DKIOCGMEDIAINFO, (caddr_t)&disk_info)) == -1)
- return (errno);
- *capacity = disk_info.dki_capacity;
- *lbsize = disk_info.dki_lbsize;
+static int
+efi_get_info(int fd, struct dk_cinfo *dki_info)
+{
+#if defined(__linux__)
+ char *path;
+ char *dev_path;
+ int rval = 0;
+
+ memset(dki_info, 0, sizeof(*dki_info));
+
+ path = calloc(PATH_MAX, 1);
+ if (path == NULL)
+ goto error;
+
+ /*
+ * The simplest way to get the partition number under linux is
+ * to parse it out of the /dev/<disk><parition> block device name.
+ * The kernel creates this using the partition number when it
+ * populates /dev/ so it may be trusted. The tricky bit here is
+ * that the naming convention is based on the block device type.
+ * So we need to take this in to account when parsing out the
+ * partition information. Another issue is that the libefi API
+ * API only provides the open fd and not the file path. To handle
+ * this realpath(3) is used to resolve the block device name from
+ * /proc/self/fd/<fd>. Aside from the partition number we collect
+ * some additional device info.
+ */
+ (void) sprintf(path, "/proc/self/fd/%d", fd);
+ dev_path = realpath(path, NULL);
+ free(path);
+
+ if (dev_path == NULL)
+ goto error;
+
+ if ((strncmp(dev_path, "/dev/sd", 7) == 0)) {
+ strcpy(dki_info->dki_cname, "sd");
+ dki_info->dki_ctype = DKC_SCSI_CCS;
+ rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu",
+ dki_info->dki_dname,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/hd", 7) == 0)) {
+ strcpy(dki_info->dki_cname, "hd");
+ dki_info->dki_ctype = DKC_DIRECT;
+ rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu",
+ dki_info->dki_dname,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/md", 7) == 0)) {
+ strcpy(dki_info->dki_cname, "pseudo");
+ dki_info->dki_ctype = DKC_MD;
+ rval = sscanf(dev_path, "/dev/%[a-zA-Z0-9]p%hu",
+ dki_info->dki_dname,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/dm-", 8) == 0)) {
+ strcpy(dki_info->dki_cname, "pseudo");
+ dki_info->dki_ctype = DKC_VBD;
+ rval = sscanf(dev_path, "/dev/%[a-zA-Z0-9-]p%hu",
+ dki_info->dki_dname,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/ram", 8) == 0)) {
+ strcpy(dki_info->dki_cname, "pseudo");
+ dki_info->dki_ctype = DKC_PCMCIA_MEM;
+ rval = sscanf(dev_path, "/dev/%[a-zA-Z0-9]p%hu",
+ dki_info->dki_dname,
+ &dki_info->dki_partition);
+ } else if ((strncmp(dev_path, "/dev/loop", 9) == 0)) {
+ strcpy(dki_info->dki_cname, "pseudo");
+ dki_info->dki_ctype = DKC_VBD;
+ rval = sscanf(dev_path, "/dev/%[a-zA-Z0-9]p%hu",
+ dki_info->dki_dname,
+ &dki_info->dki_partition);
+ } else {
+ strcpy(dki_info->dki_dname, "unknown");
+ strcpy(dki_info->dki_cname, "unknown");
+ dki_info->dki_ctype = DKC_UNKNOWN;
+ }
+
+ switch (rval) {
+ case 0:
+ errno = EINVAL;
+ goto error;
+ case 1:
+ dki_info->dki_partition = 0;
+ }
+
+ free(dev_path);
+#else
+ if (ioctl(fd, DKIOCINFO, (caddr_t)dki_info) == -1)
+ goto error;
+#endif
return (0);
+error:
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCINFO errno 0x%x\n", errno);
+
+ switch (errno) {
+ case EIO:
+ return (VT_EIO);
+ case EINVAL:
+ return (VT_EINVAL);
+ default:
+ return (VT_ERROR);
+ }
}
/*
@@ -135,12 +261,13 @@ read_disk_info(int fd, diskaddr_t *capacity, uint_t *lbsize)
int
efi_alloc_and_init(int fd, uint32_t nparts, struct dk_gpt **vtoc)
{
- diskaddr_t capacity;
- uint_t lbsize;
+ diskaddr_t capacity = 0;
+ uint_t lbsize = 0;
uint_t nblocks;
size_t length;
struct dk_gpt *vptr;
struct uuid uuid;
+ struct dk_cinfo dki_info;
if (read_disk_info(fd, &capacity, &lbsize) != 0) {
if (efi_debug)
@@ -148,6 +275,22 @@ efi_alloc_and_init(int fd, uint32_t nparts, struct dk_gpt **vtoc)
"couldn't read disk information\n");
return (-1);
}
+#if defined(__linux__)
+ if (efi_get_info(fd, &dki_info) != 0) {
+ if (efi_debug)
+ (void) fprintf(stderr,
+ "couldn't read disk information\n");
+ return (-1);
+ }
+
+ if (dki_info.dki_partition != 0)
+ return (-1);
+
+ if ((dki_info.dki_ctype == DKC_PCMCIA_MEM) ||
+ (dki_info.dki_ctype == DKC_VBD) ||
+ (dki_info.dki_ctype == DKC_UNKNOWN))
+ return (-1);
+#endif
nblocks = NBLOCKS(nparts, lbsize);
if ((nblocks * lbsize) < EFI_MIN_ARRAY_SIZE + lbsize) {
@@ -243,14 +386,138 @@ efi_ioctl(int fd, int cmd, dk_efi_t *dk_ioc)
{
void *data = dk_ioc->dki_data;
int error;
+#if defined(__linux__)
+ diskaddr_t capacity;
+ uint_t lbsize;
+
+ /*
+ * When the IO is not being performed in kernel as an ioctl we need
+ * to know the sector size so we can seek to the proper byte offset.
+ */
+ if (read_disk_info(fd, &capacity, &lbsize) == -1) {
+ if (efi_debug)
+ fprintf(stderr,"unable to read disk info: %d",errno);
+
+ errno = EIO;
+ return -1;
+ }
+
+ switch (cmd) {
+ case DKIOCGETEFI:
+ if (lbsize == 0) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCGETEFI assuming "
+ "LBA %d bytes\n", DEV_BSIZE);
+
+ lbsize = DEV_BSIZE;
+ }
+
+ error = lseek(fd, dk_ioc->dki_lba * lbsize, SEEK_SET);
+ if (error == -1) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCGETEFI lseek "
+ "error: %d\n", errno);
+ return error;
+ }
+
+ error = read(fd, data, dk_ioc->dki_length);
+ if (error == -1) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCGETEFI read "
+ "error: %d\n", errno);
+ return error;
+ }
+ if (error != dk_ioc->dki_length) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCGETEFI short "
+ "read of %d bytes\n", error);
+ errno = EIO;
+ return -1;
+ }
+ error = 0;
+ break;
+
+ case DKIOCSETEFI:
+ if (lbsize == 0) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCSETEFI unknown "
+ "LBA size\n");
+ errno = EIO;
+ return -1;
+ }
+
+ error = lseek(fd, dk_ioc->dki_lba * lbsize, SEEK_SET);
+ if (error == -1) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCSETEFI lseek "
+ "error: %d\n", errno);
+ return error;
+ }
+
+ error = write(fd, data, dk_ioc->dki_length);
+ if (error == -1) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCSETEFI write "
+ "error: %d\n", errno);
+ return error;
+ }
+
+ if (error != dk_ioc->dki_length) {
+ if (efi_debug)
+ (void) fprintf(stderr, "DKIOCSETEFI short "
+ "write of %d bytes\n", error);
+ errno = EIO;
+ return -1;
+ }
+
+ /* Sync the new EFI table to disk */
+ error = fsync(fd);
+ if (error == -1)
+ return error;
+
+ /* Ensure any local disk cache is also flushed */
+ if (ioctl(fd, BLKFLSBUF, 0) == -1)
+ return error;
+
+ error = 0;
+ break;
+
+ default:
+ if (efi_debug)
+ (void) fprintf(stderr, "unsupported ioctl()\n");
+
+ errno = EIO;
+ return -1;
+ }
+#else
dk_ioc->dki_data_64 = (uint64_t)(uintptr_t)data;
error = ioctl(fd, cmd, (void *)dk_ioc);
dk_ioc->dki_data = data;
-
+#endif
return (error);
}
+#if defined(__linux__)
+static int
+efi_rescan(int fd)
+{
+ int retry = 5;
+ int error;
+
+ /* Notify the kernel a devices partition table has been updated */
+ while ((error = ioctl(fd, BLKRRPART)) != 0) {
+ if (--retry == 0) {
+ (void) fprintf(stderr, "the kernel failed to rescan "
+ "the partition table: %d\n", errno);
+ return (-1);
+ }
+ }
+
+ return (0);
+}
+#endif
+
static int
check_label(int fd, dk_efi_t *dk_ioc)
{
@@ -305,6 +572,8 @@ efi_read(int fd, struct dk_gpt *vtoc)
int rval = 0;
int md_flag = 0;
int vdc_flag = 0;
+ diskaddr_t capacity = 0;
+ uint_t lbsize = 0;
struct dk_minfo disk_info;
dk_efi_t dk_ioc;
efi_gpt_t *efi;
@@ -316,19 +585,9 @@ efi_read(int fd, struct dk_gpt *vtoc)
/*
* get the partition number for this file descriptor.
*/
- if (ioctl(fd, DKIOCINFO, (caddr_t)&dki_info) == -1) {
- if (efi_debug) {
- (void) fprintf(stderr, "DKIOCINFO errno 0x%x\n", errno);
- }
- switch (errno) {
- case EIO:
- return (VT_EIO);
- case EINVAL:
- return (VT_EINVAL);
- default:
- return (VT_ERROR);
- }
- }
+ if ((rval = efi_get_info(fd, &dki_info)) != 0)
+ return rval;
+
if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) &&
(strncmp(dki_info.dki_dname, "md", 3) == 0)) {
md_flag++;
@@ -342,14 +601,18 @@ efi_read(int fd, struct dk_gpt *vtoc)
}
/* get the LBA size */
- if (ioctl(fd, DKIOCGMEDIAINFO, (caddr_t)&disk_info) == -1) {
+ if (read_disk_info(fd, &capacity, &lbsize) == -1) {
if (efi_debug) {
(void) fprintf(stderr,
- "assuming LBA 512 bytes %d\n",
- errno);
+ "unable to read disk info: %d",
+ errno);
}
- disk_info.dki_lbsize = DEV_BSIZE;
+ return (VT_EINVAL);
}
+
+ disk_info.dki_lbsize = lbsize;
+ disk_info.dki_capacity = capacity;
+
if (disk_info.dki_lbsize == 0) {
if (efi_debug) {
(void) fprintf(stderr,
@@ -374,9 +637,11 @@ efi_read(int fd, struct dk_gpt *vtoc)
}
}
- if ((dk_ioc.dki_data = calloc(label_len, 1)) == NULL)
+ if (posix_memalign((void **)&dk_ioc.dki_data,
+ disk_info.dki_lbsize, label_len))
return (VT_ERROR);
+ memset(dk_ioc.dki_data, 0, label_len);
dk_ioc.dki_length = disk_info.dki_lbsize;
user_length = vtoc->efi_nparts;
efi = dk_ioc.dki_data;
@@ -572,12 +837,14 @@ write_pmbr(int fd, struct dk_gpt *vtoc)
int len;
len = (vtoc->efi_lbasize == 0) ? sizeof (mb) : vtoc->efi_lbasize;
- buf = calloc(len, 1);
+ if (posix_memalign((void **)&buf, len, len))
+ return (VT_ERROR);
/*
* Preserve any boot code and disk signature if the first block is
* already an MBR.
*/
+ memset(buf, 0, len);
dk_ioc.dki_lba = 0;
dk_ioc.dki_length = len;
/* LINTED -- always longlong aligned */
@@ -663,10 +930,9 @@ check_input(struct dk_gpt *vtoc)
if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) &&
(vtoc->efi_parts[i].p_size != 0)) {
if (efi_debug) {
- (void) fprintf(stderr,
-"partition %d is \"unassigned\" but has a size of %llu",
- i,
- vtoc->efi_parts[i].p_size);
+ (void) fprintf(stderr, "partition %d is "
+ "\"unassigned\" but has a size of %llu",
+ i, vtoc->efi_parts[i].p_size);
}
return (VT_EINVAL);
}
@@ -679,9 +945,9 @@ check_input(struct dk_gpt *vtoc)
if (vtoc->efi_parts[i].p_tag == V_RESERVED) {
if (resv_part != -1) {
if (efi_debug) {
- (void) fprintf(stderr,
-"found duplicate reserved partition at %d\n",
- i);
+ (void) fprintf(stderr, "found "
+ "duplicate reserved partition "
+ "at %d\n", i);
}
return (VT_EINVAL);
}
@@ -732,8 +998,8 @@ check_input(struct dk_gpt *vtoc)
(istart <= endsect)) {
if (efi_debug) {
(void) fprintf(stderr,
-"Partition %d overlaps partition %d.",
- i, j);
+ "Partition %d overlaps "
+ "partition %d.", i, j);
}
return (VT_EINVAL);
}
@@ -839,22 +1105,13 @@ efi_write(int fd, struct dk_gpt *vtoc)
efi_gpe_t *efi_parts;
int i, j;
struct dk_cinfo dki_info;
+ int rval;
int md_flag = 0;
int nblocks;
diskaddr_t lba_backup_gpt_hdr;
- if (ioctl(fd, DKIOCINFO, (caddr_t)&dki_info) == -1) {
- if (efi_debug)
- (void) fprintf(stderr, "DKIOCINFO errno 0x%x\n", errno);
- switch (errno) {
- case EIO:
- return (VT_EIO);
- case EINVAL:
- return (VT_EINVAL);
- default:
- return (VT_ERROR);
- }
- }
+ if ((rval = efi_get_info(fd, &dki_info)) != 0)
+ return rval;
/* check if we are dealing wih a metadevice */
if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) &&
@@ -892,9 +1149,11 @@ efi_write(int fd, struct dk_gpt *vtoc)
* for backup GPT header.
*/
lba_backup_gpt_hdr = vtoc->efi_last_u_lba + 1 + nblocks;
- if ((dk_ioc.dki_data = calloc(dk_ioc.dki_length, 1)) == NULL)
+ if (posix_memalign((void **)&dk_ioc.dki_data,
+ vtoc->efi_lbasize, dk_ioc.dki_length))
return (VT_ERROR);
+ memset(dk_ioc.dki_data, 0, dk_ioc.dki_length);
efi = dk_ioc.dki_data;
/* stuff user's input into EFI struct */
@@ -941,6 +1200,10 @@ efi_write(int fd, struct dk_gpt *vtoc)
return (VT_EINVAL);
}
+ /* Zero's should be written for empty partitions */
+ if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED)
+ continue;
+
efi_parts[i].efi_gpe_StartingLBA =
LE_64(vtoc->efi_parts[i].p_start);
efi_parts[i].efi_gpe_EndingLBA =
@@ -1032,6 +1295,13 @@ efi_write(int fd, struct dk_gpt *vtoc)
/* write the PMBR */
(void) write_pmbr(fd, vtoc);
free(dk_ioc.dki_data);
+
+#if defined(__linux__)
+ rval = efi_rescan(fd);
+ if (rval)
+ return (VT_ERROR);
+#endif
+
return (0);
}
@@ -1049,6 +1319,7 @@ efi_free(struct dk_gpt *ptr)
int
efi_type(int fd)
{
+#if 0
struct vtoc vtoc;
struct extvtoc extvtoc;
@@ -1062,6 +1333,9 @@ efi_type(int fd)
}
}
return (0);
+#else
+ return (ENOSYS);
+#endif
}
void
@@ -1175,7 +1449,7 @@ efi_auto_sense(int fd, struct dk_gpt **vtoc)
return (-1);
}
- for (i = 0; i < min((*vtoc)->efi_nparts, V_NUMPAR); i++) {
+ for (i = 0; i < MIN((*vtoc)->efi_nparts, V_NUMPAR); i++) {
(*vtoc)->efi_parts[i].p_tag = default_vtoc_map[i].p_tag;
(*vtoc)->efi_parts[i].p_flag = default_vtoc_map[i].p_flag;
(*vtoc)->efi_parts[i].p_start = 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 23:10:42 +0000