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authorJeff Layton <jlayton@redhat.com>2009-07-31 06:56:09 -0400
committerSteve French <sfrench@us.ibm.com>2009-08-02 03:47:25 +0000
commit9b9d6b2434fe942895c341b9a982f158529788ec (patch)
tree402b7f233fae53f45d5ad3a445360200b6fa2cc7
parent5bd9052d79daa4c8beb45436c408b6de672adb82 (diff)
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cifs: reinstate original behavior when uid=/gid= options are specified
This patch fixes the regression reported here: http://bugzilla.kernel.org/show_bug.cgi?id=13861 commit 4ae1507f6d266d0cc3dd36e474d83aad70fec9e4 changed the default behavior when the uid= or gid= option was specified for a mount. The existing behavior was to always clobber the ownership information provided by the server when these options were specified. The above commit changed this behavior so that these options simply provided defaults when the server did not provide this information (unless "forceuid" or "forcegid" were specified) This patch reverts this change so that the default behavior is restored. It also adds "noforceuid" and "noforcegid" options to make it so that ownership information from the server is preserved, even when the mount has uid= or gid= options specified. It also adds a couple of printk notices that pop up when forceuid or forcegid options are specified without a uid= or gid= option. Reported-by: Tom Chiverton <bugzilla.kernel.org@falkensweb.com> Reviewed-by: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
-rw-r--r--fs/cifs/connect.c42
1 files changed, 30 insertions, 12 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index f2486889b7b..1f3345d7fa7 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -803,6 +803,10 @@ cifs_parse_mount_options(char *options, const char *devname,
char *data;
unsigned int temp_len, i, j;
char separator[2];
+ short int override_uid = -1;
+ short int override_gid = -1;
+ bool uid_specified = false;
+ bool gid_specified = false;
separator[0] = ',';
separator[1] = 0;
@@ -1093,18 +1097,20 @@ cifs_parse_mount_options(char *options, const char *devname,
"too long.\n");
return 1;
}
- } else if (strnicmp(data, "uid", 3) == 0) {
- if (value && *value)
- vol->linux_uid =
- simple_strtoul(value, &value, 0);
- } else if (strnicmp(data, "forceuid", 8) == 0) {
- vol->override_uid = 1;
- } else if (strnicmp(data, "gid", 3) == 0) {
- if (value && *value)
- vol->linux_gid =
- simple_strtoul(value, &value, 0);
- } else if (strnicmp(data, "forcegid", 8) == 0) {
- vol->override_gid = 1;
+ } else if (!strnicmp(data, "uid", 3) && value && *value) {
+ vol->linux_uid = simple_strtoul(value, &value, 0);
+ uid_specified = true;
+ } else if (!strnicmp(data, "forceuid", 8)) {
+ override_uid = 1;
+ } else if (!strnicmp(data, "noforceuid", 10)) {
+ override_uid = 0;
+ } else if (!strnicmp(data, "gid", 3) && value && *value) {
+ vol->linux_gid = simple_strtoul(value, &value, 0);
+ gid_specified = true;
+ } else if (!strnicmp(data, "forcegid", 8)) {
+ override_gid = 1;
+ } else if (!strnicmp(data, "noforcegid", 10)) {
+ override_gid = 0;
} else if (strnicmp(data, "file_mode", 4) == 0) {
if (value && *value) {
vol->file_mode =
@@ -1355,6 +1361,18 @@ cifs_parse_mount_options(char *options, const char *devname,
if (vol->UNCip == NULL)
vol->UNCip = &vol->UNC[2];
+ if (uid_specified)
+ vol->override_uid = override_uid;
+ else if (override_uid == 1)
+ printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
+ "specified with no uid= option.\n");
+
+ if (gid_specified)
+ vol->override_gid = override_gid;
+ else if (override_gid == 1)
+ printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
+ "specified with no gid= option.\n");
+
return 0;
}