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mount: fix -o user=foo mishandling, fix unc= generation, add prefixpath=

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function                                             old     new   delta
singlemount                                         1019    1049     +30
packed_usage                                       29252   29257      +5
parse_mount_options                                  230     232      +2
mount_option_str                                     337     338      +1
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(add/remove: 0/0 grow/shrink: 4/0 up/down: 38/0)               Total: 38 bytes

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Bernhard Reutner-Fischer 2013-01-17 02:30:35 +01:00 committed by Denys Vlasenko
parent e4f0f26bad
commit 20c5e5a626
1 changed files with 35 additions and 17 deletions
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52
util-linux/mount.c
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@ -36,6 +36,10 @@
//usage: IF_FEATURE_MTAB_SUPPORT( //usage: IF_FEATURE_MTAB_SUPPORT(
//usage: "\n -n Don't update /etc/mtab" //usage: "\n -n Don't update /etc/mtab"
//usage: ) //usage: )
//usage: IF_FEATURE_MOUNT_VERBOSE(
//usage: "\n -v Verbose"
//usage: )
////usage: "\n -s Sloppy (ignored)"
//usage: "\n -r Read-only mount" //usage: "\n -r Read-only mount"
//usage: "\n -w Read-write mount (default)" //usage: "\n -w Read-write mount (default)"
//usage: "\n -t FSTYPE[,...] Filesystem type(s)" //usage: "\n -t FSTYPE[,...] Filesystem type(s)"
@ -224,7 +228,7 @@ static const int32_t mount_options[] = {
IF_DESKTOP(/* "user" */ MOUNT_USERS,) IF_DESKTOP(/* "user" */ MOUNT_USERS,)
IF_DESKTOP(/* "users" */ MOUNT_USERS,) IF_DESKTOP(/* "users" */ MOUNT_USERS,)
/* "_netdev" */ 0, /* "_netdev" */ 0,
IF_DESKTOP(/* "comment" */ 0,) /* systemd uses this in fstab */ IF_DESKTOP(/* "comment=" */ 0,) /* systemd uses this in fstab */
) )
IF_FEATURE_MOUNT_FLAGS( IF_FEATURE_MOUNT_FLAGS(
@ -283,7 +287,7 @@ static const char mount_option_str[] =
IF_DESKTOP("user\0") IF_DESKTOP("user\0")
IF_DESKTOP("users\0") IF_DESKTOP("users\0")
"_netdev\0" "_netdev\0"
IF_DESKTOP("comment\0") /* systemd uses this in fstab */ IF_DESKTOP("comment=\0") /* systemd uses this in fstab */
) )
IF_FEATURE_MOUNT_FLAGS( IF_FEATURE_MOUNT_FLAGS(
// vfs flags // vfs flags
@ -475,10 +479,13 @@ static unsigned long parse_mount_options(char *options, char **unrecognized)
// FIXME: use hasmntopt() // FIXME: use hasmntopt()
// Find this option in mount_options // Find this option in mount_options
for (i = 0; i < ARRAY_SIZE(mount_options); i++) { for (i = 0; i < ARRAY_SIZE(mount_options); i++) {
/* We support "option=" match for "comment=" thingy */
unsigned opt_len = strlen(option_str); unsigned opt_len = strlen(option_str);
if (strncasecmp(option_str, options, opt_len) == 0 if (strncasecmp(option_str, options, opt_len) == 0
&& (options[opt_len] == '\0' || options[opt_len] == '=') && (options[opt_len] == '\0'
/* or is it "comment=" thingy in fstab? */
IF_FEATURE_MOUNT_FSTAB(IF_DESKTOP( || option_str[opt_len-1] == '=' ))
)
) { ) {
unsigned long fl = mount_options[i]; unsigned long fl = mount_options[i];
if (fl & BB_MS_INVERTED_VALUE) if (fl & BB_MS_INVERTED_VALUE)
@ -1817,31 +1824,44 @@ static int singlemount(struct mntent *mp, int ignore_busy)
) { ) {
int len; int len;
char c; char c;
char *hostname, *share;
char *dotted, *ip;
len_and_sockaddr *lsa; len_and_sockaddr *lsa;
char *hostname, *dotted, *ip;
// Parse mp->mnt_fsname of the form "//hostname/share[/dir1/dir2]"
hostname = mp->mnt_fsname + 2; hostname = mp->mnt_fsname + 2;
len = strcspn(hostname, "/\\"); len = strcspn(hostname, "/\\");
if (len == 0 // 1st char is a [back]slash (IOW: empty hostname) share = hostname + len + 1;
|| hostname[len] == '\0' // no [back]slash after hostname if (len == 0 // 3rd char is a [back]slash (IOW: empty hostname)
|| hostname[len+1] == '\0' // empty share name || share[-1] == '\0' // no [back]slash after hostname
|| share[0] == '\0' // empty share name
) { ) {
goto report_error; goto report_error;
} }
c = hostname[len]; c = share[-1];
hostname[len] = '\0'; share[-1] = '\0';
len = strcspn(share, "/\\");
// "unc=\\hostname\share" option is mandatory // "unc=\\hostname\share" option is mandatory
// after CIFS option parsing was rewritten in Linux 3.4. // after CIFS option parsing was rewritten in Linux 3.4.
// Must pass it to the kernel. Must use backslashes. // Must use backslashes.
// If /dir1/dir2 is present, also add "prefixpath=dir1/dir2"
{ {
char *unc = xasprintf("unc=\\\\%s\\%s", hostname, hostname + len + 1); char *unc = xasprintf(
parse_mount_options(unc, &filteropts); share[len] != '\0' /* "/dir1/dir2" exists? */
if (ENABLE_FEATURE_CLEAN_UP) free(unc); ? "unc=\\\\%s\\%.*s,prefixpath=%s"
: "unc=\\\\%s\\%.*s",
hostname,
len, share,
share + len + 1 /* "dir1/dir2" */
);
parse_mount_options(unc, &filteropts);
if (ENABLE_FEATURE_CLEAN_UP) free(unc);
} }
lsa = host2sockaddr(hostname, 0); lsa = host2sockaddr(hostname, 0);
hostname[len] = c; share[-1] = c;
if (!lsa) if (!lsa)
goto report_error; goto report_error;
@ -1853,8 +1873,6 @@ static int singlemount(struct mntent *mp, int ignore_busy)
parse_mount_options(ip, &filteropts); parse_mount_options(ip, &filteropts);
if (ENABLE_FEATURE_CLEAN_UP) free(ip); if (ENABLE_FEATURE_CLEAN_UP) free(ip);
// "-o mand" is required [why?]
vfsflags |= MS_MANDLOCK;
mp->mnt_type = (char*)"cifs"; mp->mnt_type = (char*)"cifs";
rc = mount_it_now(mp, vfsflags, filteropts); rc = mount_it_now(mp, vfsflags, filteropts);