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authorIgor Mammedov <niallain@gmail.com>2008-01-11 01:49:48 +0000
committerSteve French <sfrench@us.ibm.com>2008-01-11 01:49:48 +0000
commite6ab15827eec0bc4444421f7ccf0223de321c708 (patch)
tree59fa8c7ad8247c45c0393f6f900460ab1e04a2f0
parent197c183f3526dc08aa52ca97ec66c268442d4b84 (diff)
[CIFS] DFS support patchset: Added mountdata
Also cifs_fs_type was made not static for ussage in dfs code. Signed-off-by: Igor Mammedov <niallain@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
-rw-r--r--fs/cifs/cifs_fs_sb.h5
-rw-r--r--fs/cifs/cifsfs.c37
-rw-r--r--fs/cifs/cifsfs.h1
3 files changed, 41 insertions, 2 deletions
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index 34af556cdd8..8ad2330ba06 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -43,6 +43,9 @@ struct cifs_sb_info {
mode_t mnt_dir_mode;
int mnt_cifs_flags;
int prepathlen;
- char *prepath;
+ char *prepath; /* relative path under the share to mount to */
+#ifdef CONFIG_CIFS_DFS_UPCALL
+ char *mountdata; /* mount options received at mount time */
+#endif
};
#endif /* _CIFS_FS_SB_H */
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 000b4a5d321..93e107883a6 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -97,6 +97,9 @@ cifs_read_super(struct super_block *sb, void *data,
{
struct inode *inode;
struct cifs_sb_info *cifs_sb;
+#ifdef CONFIG_CIFS_DFS_UPCALL
+ int len;
+#endif
int rc = 0;
/* BB should we make this contingent on mount parm? */
@@ -106,6 +109,25 @@ cifs_read_super(struct super_block *sb, void *data,
if (cifs_sb == NULL)
return -ENOMEM;
+#ifdef CONFIG_CIFS_DFS_UPCALL
+ /* copy mount params to sb for use in submounts */
+ /* BB: should we move this after the mount so we
+ * do not have to do the copy on failed mounts?
+ * BB: May be it is better to do simple copy before
+ * complex operation (mount), and in case of fail
+ * just exit instead of doing mount and attempting
+ * undo it if this copy fails?*/
+ len = strlen(data);
+ cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
+ if (cifs_sb->mountdata == NULL) {
+ kfree(sb->s_fs_info);
+ sb->s_fs_info = NULL;
+ return -ENOMEM;
+ }
+ strncpy(cifs_sb->mountdata, data, len + 1);
+ cifs_sb->mountdata[len] = '\0';
+#endif
+
rc = cifs_mount(sb, cifs_sb, data, devname);
if (rc) {
@@ -155,6 +177,12 @@ out_no_root:
out_mount_failed:
if (cifs_sb) {
+#ifdef CONFIG_CIFS_DFS_UPCALL
+ if (cifs_sb->mountdata) {
+ kfree(cifs_sb->mountdata);
+ cifs_sb->mountdata = NULL;
+ }
+#endif
if (cifs_sb->local_nls)
unload_nls(cifs_sb->local_nls);
kfree(cifs_sb);
@@ -178,6 +206,13 @@ cifs_put_super(struct super_block *sb)
if (rc) {
cERROR(1, ("cifs_umount failed with return code %d", rc));
}
+#ifdef CONFIG_CIFS_DFS_UPCALL
+ if (cifs_sb->mountdata) {
+ kfree(cifs_sb->mountdata);
+ cifs_sb->mountdata = NULL;
+ }
+#endif
+
unload_nls(cifs_sb->local_nls);
kfree(cifs_sb);
return;
@@ -553,7 +588,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
return remote_llseek(file, offset, origin);
}
-static struct file_system_type cifs_fs_type = {
+struct file_system_type cifs_fs_type = {
.owner = THIS_MODULE,
.name = "cifs",
.get_sb = cifs_get_sb,
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 2a21dc66f0d..2e68126d07e 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -32,6 +32,7 @@
#define TRUE 1
#endif
+extern struct file_system_type cifs_fs_type;
extern const struct address_space_operations cifs_addr_ops;
extern const struct address_space_operations cifs_addr_ops_smallbuf;