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mount: make FEATURE_MOUNT_NFS not needed for Linux 2.6.23+

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-11-10 16:53:35 +01:00
parent fae473c81b
commit a86e02492d
2 changed files with 49 additions and 9 deletions
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11
util-linux/Config.src
View File

@ -485,13 +485,18 @@ config FEATURE_MOUNT_LABEL
This also enables label or uuid support for swapon.
config FEATURE_MOUNT_NFS
bool "Support mounting NFS file systems"
default y
bool "Support mounting NFS file systems on Linux < 2.6.23"
default n
depends on MOUNT
select FEATURE_HAVE_RPC
select FEATURE_SYSLOG
help
Enable mounting of NFS file systems.
Enable mounting of NFS file systems on Linux kernels prior
to version 2.6.23. Note that in this case mounting of NFS
over IPv6 will not be possible.
Note that this option links in RPC support from libc,
which is rather large (~10 kbytes on uclibc).
config FEATURE_MOUNT_CIFS
bool "Support mounting CIFS/SMB file systems"

47
util-linux/mount.c
View File

@ -1144,7 +1144,7 @@ static NOINLINE int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
pathname = s + 1;
*s = '\0';
/* Ignore all but first hostname in replicated mounts
until they can be fully supported. (mack@sgi.com) */
* until they can be fully supported. (mack@sgi.com) */
s = strchr(hostname, ',');
if (s) {
*s = '\0';
@ -1683,7 +1683,6 @@ static NOINLINE int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
/* Perform actual mount */
do_mount:
mp->mnt_type = (char*)"nfs";
retval = mount_it_now(mp, vfsflags, (char*)&data);
goto ret;
@ -1708,8 +1707,43 @@ static NOINLINE int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
#else // !ENABLE_FEATURE_MOUNT_NFS
// Never called. Call should be optimized out.
int nfsmount(struct mntent *mp, long vfsflags, char *filteropts);
/* Linux 2.6.23+ supports nfs mounts with options passed as a string.
* For older kernels, you must build busybox with ENABLE_FEATURE_MOUNT_NFS.
* (However, note that then you lose any chances that NFS over IPv6 would work).
*/
static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
{
len_and_sockaddr *lsa;
char *opts;
char *end;
char *dotted;
int ret;
# if ENABLE_FEATURE_IPV6
end = strchr(mp->mnt_fsname, ']');
if (end && end[1] == ':')
end++;
else
# endif
/* mount_main() guarantees that ':' is there */
end = strchr(mp->mnt_fsname, ':');
*end = '\0';
lsa = xdotted2sockaddr(mp->mnt_fsname, /*port:*/ 0);
*end = ':';
dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
if (ENABLE_FEATURE_CLEAN_UP) free(lsa);
opts = xasprintf("%s%saddr=%s",
filteropts ? filteropts : "",
filteropts ? "," : "",
dotted
);
if (ENABLE_FEATURE_CLEAN_UP) free(dotted);
ret = mount_it_now(mp, vfsflags, opts);
if (ENABLE_FEATURE_CLEAN_UP) free(opts);
return ret;
}
#endif // !ENABLE_FEATURE_MOUNT_NFS
@ -1800,10 +1834,11 @@ static int singlemount(struct mntent *mp, int ignore_busy)
}
// Might this be an NFS filesystem?
if (ENABLE_FEATURE_MOUNT_NFS
&& (!mp->mnt_type || strcmp(mp->mnt_type, "nfs") == 0)
if ((!mp->mnt_type || strncmp(mp->mnt_type, "nfs", 3) == 0)
&& strchr(mp->mnt_fsname, ':') != NULL
) {
if (!mp->mnt_type)
mp->mnt_type = (char*)"nfs";
rc = nfsmount(mp, vfsflags, filteropts);
goto report_error;
}