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Move stat () and device mode checking into OS-dependent files as

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long as performance doesn't suffer.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-10-19 16:29:20 +02:00
parent a4012f0764
commit cd78a56fb2
10 changed files with 93 additions and 71 deletions
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5
ChangeLog
View file

@ -1,3 +1,8 @@
2013-10-19 Vladimir Serbinenko <phcoder@gmail.com>
Move stat () and device mode checking into OS-dependent files as
long as performance doesn't suffer.
2013-10-19 Vladimir Serbinenko <phcoder@gmail.com>
Split make_system_path_relative_to_its_root into separate file

7
grub-core/osdep/apple/getroot.c
View file

@ -57,6 +57,13 @@ grub_util_part_to_disk (const char *os_dev, struct stat *st,
int *is_part)
{
char *path = xstrdup (os_dev);
if (! S_ISCHR (st->st_mode))
{
*is_part = 0;
return path;
}
if (strncmp ("/dev/", path, 5) == 0)
{
char *p;

7
grub-core/osdep/bsd/getroot.c
View file

@ -65,6 +65,13 @@ grub_util_part_to_disk (const char *os_dev, struct stat *st,
int *is_part)
{
int rawpart = -1;
if (! S_ISCHR (st->st_mode))
{
*is_part = 0;
return xstrdup (os_dev);
}
# ifdef HAVE_GETRAWPARTITION
rawpart = getrawpartition();
# endif /* HAVE_GETRAWPARTITION */

7
grub-core/osdep/devmapper/getroot.c
View file

@ -321,6 +321,13 @@ grub_util_devmapper_part_to_disk (struct stat *st,
int
grub_util_device_is_mapped_stat (struct stat *st)
{
#if GRUB_DISK_DEVS_ARE_CHAR
if (! S_ISCHR (st->st_mode))
#else
if (! S_ISBLK (st->st_mode))
#endif
return 0;
if (!grub_device_mapper_supported ())
return 0;

7
grub-core/osdep/devmapper/hostdisk.c
View file

@ -72,6 +72,13 @@ grub_util_device_is_mapped (const char *dev)
if (stat (dev, &st) < 0)
return 0;
#if GRUB_DISK_DEVS_ARE_CHAR
if (! S_ISCHR (st.st_mode))
#else
if (! S_ISBLK (st.st_mode))
#endif
return 0;
return dm_is_dm_major (major (st.st_rdev));
}

7
grub-core/osdep/freebsd/getroot.c
View file

@ -115,6 +115,13 @@ grub_util_part_to_disk (const char *os_dev, struct stat *st,
int *is_part)
{
char *out, *out2;
if (! S_ISCHR (st->st_mode))
{
*is_part = 0;
return xstrdup (os_dev);
}
if (strncmp (os_dev, "/dev/", sizeof ("/dev/") - 1) != 0)
return xstrdup (os_dev);
grub_util_follow_gpart_up (os_dev + sizeof ("/dev/") - 1, NULL, &out);

8
grub-core/osdep/hurd/getroot.c
View file

@ -143,13 +143,19 @@ is_fulldisk (const char *child, const char *parent)
char *
grub_util_part_to_disk (const char *os_dev,
struct stat *st __attribute__ ((unused)),
struct stat *st,
int *is_part)
{
char *path;
grub_disk_addr_t offset;
char *p;
if (! S_ISBLK (st->st_mode))
{
*is_part = 0;
return xstrdup (os_dev);
}
if (!grub_util_hurd_get_disk_info (os_dev, NULL, &offset, NULL, &path))
return xstrdup (os_dev);

6
grub-core/osdep/linux/getroot.c
View file

@ -541,6 +541,12 @@ grub_util_part_to_disk (const char *os_dev, struct stat *st,
{
char *path = xmalloc (PATH_MAX);
if (! S_ISBLK (st->st_mode))
{
*is_part = 0;
return xstrdup (os_dev);
}
if (! realpath (os_dev, path))
return NULL;

9
grub-core/osdep/sun/getroot.c
View file

@ -54,10 +54,17 @@
char *
grub_util_part_to_disk (const char *os_dev,
struct stat *st __attribute__ ((unused)),
struct stat *st,
int *is_part)
{
char *colon = grub_strrchr (os_dev, ':');
if (! S_ISCHR (st->st_mode))
{
*is_part = 0;
return xstrdup (os_dev);
}
if (grub_memcmp (os_dev, "/devices", sizeof ("/devices") - 1) == 0
&& colon)
{

101
util/getroot.c
View file

@ -143,34 +143,47 @@ grub_util_get_dev_abstraction (const char *os_dev)
}
static char *
convert_system_partition_to_system_disk (const char *os_dev, struct stat *st,
int *is_part)
convert_system_partition_to_system_disk (const char *os_dev, int *is_part)
{
*is_part = 0;
#if GRUB_UTIL_FD_STAT_IS_FUNCTIONAL
struct stat st;
if (grub_util_device_is_mapped_stat (st))
return grub_util_devmapper_part_to_disk (st, is_part, os_dev);
if (stat (os_dev, &st) < 0)
{
const char *errstr = strerror (errno);
grub_error (GRUB_ERR_BAD_DEVICE, N_("cannot stat `%s': %s"),
os_dev, errstr);
grub_util_info (_("cannot stat `%s': %s"), os_dev, errstr);
return 0;
}
*is_part = 0;
return grub_util_part_to_disk (os_dev, st, is_part);
if (grub_util_device_is_mapped_stat (&st))
return grub_util_devmapper_part_to_disk (&st, is_part, os_dev);
*is_part = 0;
return grub_util_part_to_disk (os_dev, &st, is_part);
#else
*is_part = 0;
return grub_util_part_to_disk (os_dev, NULL, is_part);
#endif
}
static const char *
find_system_device (const char *os_dev, struct stat *st, int convert, int add)
find_system_device (const char *os_dev)
{
char *os_disk;
const char *drive;
int is_part;
if (convert)
os_disk = convert_system_partition_to_system_disk (os_dev, st, &is_part);
else
os_disk = xstrdup (os_dev);
os_disk = convert_system_partition_to_system_disk (os_dev, &is_part);
if (! os_disk)
return NULL;
drive = grub_hostdisk_os_dev_to_grub_drive (os_disk, add);
drive = grub_hostdisk_os_dev_to_grub_drive (os_disk, 0);
free (os_disk);
return drive;
}
@ -201,22 +214,7 @@ grub_util_get_os_disk (const char *os_dev)
grub_util_info ("Looking for %s", os_dev);
#if GRUB_UTIL_FD_STAT_IS_FUNCTIONAL
struct stat st;
if (stat (os_dev, &st) < 0)
{
const char *errstr = strerror (errno);
grub_error (GRUB_ERR_BAD_DEVICE, N_("cannot stat `%s': %s"),
os_dev, errstr);
grub_util_info (_("cannot stat `%s': %s"), os_dev, errstr);
return 0;
}
return convert_system_partition_to_system_disk (os_dev, &st, &is_part);
#else
return convert_system_partition_to_system_disk (os_dev, NULL, &is_part);
#endif
return convert_system_partition_to_system_disk (os_dev, &is_part);
}
#if !defined(__APPLE__)
@ -252,41 +250,19 @@ find_partition (grub_disk_t dsk __attribute__ ((unused)),
char *
grub_util_biosdisk_get_grub_dev (const char *os_dev)
{
#if GRUB_UTIL_FD_STAT_IS_FUNCTIONAL
struct stat st;
#endif
const char *drive;
char *sys_disk;
int is_part;
grub_util_info ("Looking for %s", os_dev);
#if GRUB_UTIL_FD_STAT_IS_FUNCTIONAL
if (stat (os_dev, &st) < 0)
{
const char *errstr = strerror (errno);
grub_error (GRUB_ERR_BAD_DEVICE, N_("cannot stat `%s': %s"), os_dev,
errstr);
grub_util_info (_("cannot stat `%s': %s"), os_dev, errstr);
return 0;
}
drive = find_system_device (os_dev, &st, 1, 1);
#if GRUB_DISK_DEVS_ARE_CHAR
if (! S_ISCHR (st.st_mode))
#else
if (! S_ISBLK (st.st_mode))
#endif
return make_device_name (drive);
sys_disk = convert_system_partition_to_system_disk (os_dev, &st, &is_part);
#else
drive = find_system_device (os_dev, NULL, 1, 1);
sys_disk = convert_system_partition_to_system_disk (os_dev, NULL, &is_part);
#endif
sys_disk = convert_system_partition_to_system_disk (os_dev, &is_part);
if (!sys_disk)
return 0;
drive = grub_hostdisk_os_dev_to_grub_drive (sys_disk, 1);
grub_util_info ("%s is a parent of %s", sys_disk, os_dev);
if (!is_part)
{
@ -426,11 +402,7 @@ grub_util_biosdisk_get_grub_dev (const char *os_dev)
grub_errno = GRUB_ERR_NONE;
canon = canonicalize_file_name (os_dev);
#if GRUB_UTIL_FD_STAT_IS_FUNCTIONAL
drive = find_system_device (canon ? : os_dev, &st, 0, 1);
#else
drive = find_system_device (canon ? : os_dev, NULL, 0, 1);
#endif
drive = grub_hostdisk_os_dev_to_grub_drive (canon ? : os_dev, 1);
if (canon)
free (canon);
return make_device_name (drive);
@ -473,16 +445,7 @@ grub_util_biosdisk_get_grub_dev (const char *os_dev)
int
grub_util_biosdisk_is_present (const char *os_dev)
{
#if GRUB_UTIL_FD_STAT_IS_FUNCTIONAL
struct stat st;
if (stat (os_dev, &st) < 0)
return 0;
int ret= (find_system_device (os_dev, &st, 1, 0) != NULL);
#else
int ret= (find_system_device (os_dev, NULL, 1, 0) != NULL);
#endif
int ret = (find_system_device (os_dev) != NULL);
grub_util_info ((ret ? "%s is present" : "%s is not present"),
os_dev);
return ret;