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-rw-r--r--utils/mountd/cache.c166
1 files changed, 156 insertions, 10 deletions
diff --git a/utils/mountd/cache.c b/utils/mountd/cache.c
index 37e7160..6947203 100644
--- a/utils/mountd/cache.c
+++ b/utils/mountd/cache.c
@@ -27,6 +27,20 @@
#include "mountd.h"
#include "xmalloc.h"
+#include "blkid/blkid.h"
+
+
+enum nfsd_fsid {
+ FSID_DEV = 0,
+ FSID_NUM,
+ FSID_MAJOR_MINOR,
+ FSID_ENCODE_DEV,
+ FSID_UUID4_INUM,
+ FSID_UUID8,
+ FSID_UUID16,
+ FSID_UUID16_INUM,
+};
+
/*
* Support routines for text-based upcalls.
* Fields are separated by spaces.
@@ -87,6 +101,72 @@ void auth_unix_ip(FILE *f)
}
+int get_uuid(char *path, char *uuid, int uuidlen, char *u)
+{
+ /* extract hex digits from uuidstr and compose a uuid
+ * of the given length (max 16), xoring bytes to make
+ * a smaller uuid. Then compare with uuid
+ */
+ int i = 0;
+ const char *val;
+
+ if (path) {
+ static blkid_cache cache = NULL;
+ struct stat stb;
+ char *devname;
+ blkid_tag_iterate iter;
+ blkid_dev dev;
+ const char *type;
+ if (cache == NULL)
+ blkid_get_cache(&cache, NULL);
+
+ blkid_probe_all_new(cache);
+
+ if (stat(path, &stb) != 0)
+ return 0;
+ devname = blkid_devno_to_devname(stb.st_dev);
+ if (!devname)
+ return 0;
+ dev = blkid_get_dev(cache, devname, BLKID_DEV_NORMAL);
+ free(devname);
+ if (!dev)
+ return 0;
+ iter = blkid_tag_iterate_begin(dev);
+ if (!iter)
+ return 0;
+ while (blkid_tag_next(iter, &type, &val) == 0)
+ if (strcmp(type, "UUID") == 0)
+ break;
+ blkid_tag_iterate_end(iter);
+ if (!type)
+ return 0;
+ } else {
+ val = uuid;
+ }
+
+ memset(u, 0, uuidlen);
+ for ( ; *val ; val++) {
+ char c = *val;
+ if (!isxdigit(c))
+ continue;
+ if (isalpha(c)) {
+ if (isupper(c))
+ c = c - 'A' + 10;
+ else
+ c = c - 'a' + 10;
+ } else
+ c = c - '0' + 0;
+ if ((i&1) == 0)
+ c <<= 4;
+ u[i/2] ^= c;
+ i++;
+ if (i == uuidlen*2)
+ i = 0;
+ }
+ return 1;
+}
+
+
void nfsd_fh(FILE *f)
{
/* request are:
@@ -100,12 +180,15 @@ void nfsd_fh(FILE *f)
int fsidlen;
unsigned int dev, major=0, minor=0;
unsigned int inode=0;
+ unsigned long long inode64;
unsigned int fsidnum=0;
char fsid[32];
struct exportent *found = NULL;
nfs_export *exp;
int i;
int dev_missing = 0;
+ int uuidlen = 0;
+ char *fhuuid = NULL;
if (readline(fileno(f), &lbuf, &lbuflen) != 1)
return;
@@ -119,12 +202,12 @@ void nfsd_fh(FILE *f)
goto out;
if (qword_get_int(&cp, &fsidtype) != 0)
goto out;
- if (fsidtype < 0 || fsidtype > 3)
+ if (fsidtype < 0 || fsidtype > 7)
goto out; /* unknown type */
if ((fsidlen = qword_get(&cp, fsid, 32)) <= 0)
goto out;
switch(fsidtype) {
- case 0: /* 4 bytes: 2 major, 2 minor, 4 inode */
+ case FSID_DEV: /* 4 bytes: 2 major, 2 minor, 4 inode */
if (fsidlen != 8)
goto out;
memcpy(&dev, fsid, 4);
@@ -133,13 +216,13 @@ void nfsd_fh(FILE *f)
minor = ntohl(dev) & 0xFFFF;
break;
- case 1: /* 4 bytes - fsid */
+ case FSID_NUM: /* 4 bytes - fsid */
if (fsidlen != 4)
goto out;
memcpy(&fsidnum, fsid, 4);
break;
- case 2: /* 12 bytes: 4 major, 4 minor, 4 inode
+ case FSID_MAJOR_MINOR: /* 12 bytes: 4 major, 4 minor, 4 inode
* This format is never actually used but was
* an historical accident
*/
@@ -150,7 +233,7 @@ void nfsd_fh(FILE *f)
memcpy(&inode, fsid+8, 4);
break;
- case 3: /* 8 bytes: 4 byte packed device number, 4 inode */
+ case FSID_ENCODE_DEV: /* 8 bytes: 4 byte packed device number, 4 inode */
/* This is *host* endian, not net-byte-order, because
* no-one outside this host has any business interpreting it
*/
@@ -162,6 +245,33 @@ void nfsd_fh(FILE *f)
minor = (dev & 0xff) | ((dev >> 12) & 0xfff00);
break;
+ case FSID_UUID4_INUM: /* 4 byte inode number and 4 byte uuid */
+ if (fsidlen != 8)
+ goto out;
+ memcpy(&inode, fsid, 4);
+ uuidlen = 4;
+ fhuuid = fsid+4;
+ break;
+ case FSID_UUID8: /* 8 byte uuid */
+ if (fsidlen != 8)
+ goto out;
+ uuidlen = 8;
+ fhuuid = fsid;
+ break;
+ case FSID_UUID16: /* 16 byte uuid */
+ if (fsidlen != 16)
+ goto out;
+ uuidlen = 16;
+ fhuuid = fsid;
+ break;
+ case FSID_UUID16_INUM: /* 8 byte inode number and 16 byte uuid */
+ if (fsidlen != 24)
+ goto out;
+ memcpy(&inode64, fsid, 8);
+ inode = inode64;
+ uuidlen = 16;
+ fhuuid = fsid+8;
+ break;
}
auth_reload();
@@ -170,6 +280,7 @@ void nfsd_fh(FILE *f)
for (i=0 ; i < MCL_MAXTYPES; i++) {
for (exp = exportlist[i]; exp; exp = exp->m_next) {
struct stat stb;
+ char u[16];
if (!client_member(dom, exp->m_client->m_hostname))
continue;
@@ -180,16 +291,41 @@ void nfsd_fh(FILE *f)
dev_missing ++;
if (stat(exp->m_export.e_path, &stb) != 0)
continue;
- if (fsidtype == 1 &&
- ((exp->m_export.e_flags & NFSEXP_FSID) == 0 ||
- exp->m_export.e_fsid != fsidnum))
- continue;
- if (fsidtype != 1) {
+ switch(fsidtype){
+ case FSID_DEV:
+ case FSID_MAJOR_MINOR:
+ case FSID_ENCODE_DEV:
if (stb.st_ino != inode)
continue;
if (major != major(stb.st_dev) ||
minor != minor(stb.st_dev))
continue;
+ break;
+ case FSID_NUM:
+ if (((exp->m_export.e_flags & NFSEXP_FSID) == 0 ||
+ exp->m_export.e_fsid != fsidnum))
+ continue;
+ break;
+ case FSID_UUID4_INUM:
+ case FSID_UUID16_INUM:
+ if (stb.st_ino != inode)
+ continue;
+ goto check_uuid;
+ case FSID_UUID8:
+ case FSID_UUID16:
+ if (!is_mountpoint(exp->m_export.e_path))
+ continue;
+ check_uuid:
+ if (exp->m_export.e_uuid)
+ get_uuid(NULL, exp->m_export.e_uuid,
+ uuidlen, u);
+ else if (get_uuid(exp->m_export.e_path, NULL,
+ uuidlen, u) == 0)
+ continue;
+
+ if (memcmp(u, fhuuid, uuidlen) != 0)
+ continue;
+ break;
}
/* It's a match !! */
if (!found)
@@ -246,6 +382,16 @@ static int dump_to_cache(FILE *f, char *domain, char *path, struct exportent *ex
qword_printint(f, exp->e_anonuid);
qword_printint(f, exp->e_anongid);
qword_printint(f, exp->e_fsid);
+ if (exp->e_uuid == NULL) {
+ char u[16];
+ if (get_uuid(exp->e_path, NULL, 16, u)) {
+ qword_print(f, "uuid");
+ qword_printhex(f, u, 16);
+ }
+ } else if (exp->e_uuid) {
+ qword_print(f, "uuid");
+ qword_printhex(f, exp->e_uuid, 16);
+ }
}
return qword_eol(f);
}
generated by cgit (git 2.34.1) at 2025-07-03 11:10:24 +0000