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-rw-r--r--fs/cifs/cifs_dfs_ref.c12
-rw-r--r--fs/cifs/cifsfs.c2
-rw-r--r--fs/cifs/cifsproto.h6
-rw-r--r--fs/cifs/connect.c32
-rw-r--r--fs/cifs/dfs_cache.c8
-rw-r--r--fs/cifs/fs_context.c31
6 files changed, 75 insertions, 16 deletions
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index e4c6ae47a796..6b1ce4efb591 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -133,8 +133,9 @@ cifs_build_devname(char *nodename, const char *prepath)
* Caller is responsible for freeing returned value if it is not error.
*/
char *cifs_compose_mount_options(const char *sb_mountdata,
- const char *fullpath,
- const struct dfs_info3_param *ref)
+ const char *fullpath,
+ const struct dfs_info3_param *ref,
+ char **devname)
{
int rc;
char *name;
@@ -231,7 +232,10 @@ char *cifs_compose_mount_options(const char *sb_mountdata,
strcat(mountdata, "ip=");
strcat(mountdata, srvIP);
- kfree(name);
+ if (devname)
+ *devname = name;
+ else
+ kfree(name);
/*cifs_dbg(FYI, "%s: parent mountdata: %s\n", __func__, sb_mountdata);*/
/*cifs_dbg(FYI, "%s: submount mountdata: %s\n", __func__, mountdata );*/
@@ -278,7 +282,7 @@ static struct vfsmount *cifs_dfs_do_mount(struct dentry *mntpt,
/* strip first '\' from fullpath */
mountdata = cifs_compose_mount_options(cifs_sb->ctx->mount_options,
- fullpath + 1, NULL);
+ fullpath + 1, NULL, NULL);
if (IS_ERR(mountdata)) {
kfree(devname);
return (struct vfsmount *)mountdata;
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index ce0d0037fd0a..e46da536ed33 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -822,7 +822,7 @@ cifs_smb3_do_mount(struct file_system_type *fs_type,
goto out;
}
- rc = cifs_setup_volume_info(cifs_sb->ctx);
+ rc = cifs_setup_volume_info(cifs_sb->ctx, NULL, old_ctx->UNC);
if (rc) {
root = ERR_PTR(rc);
goto out;
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 340ff81ee87b..32f7a013402e 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -78,7 +78,8 @@ extern char *cifs_build_path_to_root(struct smb3_fs_context *ctx,
int add_treename);
extern char *build_wildcard_path_from_dentry(struct dentry *direntry);
extern char *cifs_compose_mount_options(const char *sb_mountdata,
- const char *fullpath, const struct dfs_info3_param *ref);
+ const char *fullpath, const struct dfs_info3_param *ref,
+ char **devname);
/* extern void renew_parental_timestamps(struct dentry *direntry);*/
extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer,
struct TCP_Server_Info *server);
@@ -89,6 +90,7 @@ extern void cifs_wake_up_task(struct mid_q_entry *mid);
extern int cifs_handle_standard(struct TCP_Server_Info *server,
struct mid_q_entry *mid);
extern int smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx);
+extern int smb3_parse_opt(const char *options, const char *key, char **val);
extern bool cifs_match_ipaddr(struct sockaddr *srcaddr, struct sockaddr *rhs);
extern int cifs_discard_remaining_data(struct TCP_Server_Info *server);
extern int cifs_call_async(struct TCP_Server_Info *server,
@@ -549,7 +551,7 @@ extern int SMBencrypt(unsigned char *passwd, const unsigned char *c8,
unsigned char *p24);
extern int
-cifs_setup_volume_info(struct smb3_fs_context *ctx);
+cifs_setup_volume_info(struct smb3_fs_context *ctx, const char *mntopts, const char *devname);
extern struct TCP_Server_Info *
cifs_find_tcp_session(struct smb3_fs_context *ctx);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index c8ef24bac94f..10fe6d6d2dee 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2972,17 +2972,20 @@ expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
rc = dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb),
ref_path, &referral, NULL);
if (!rc) {
+ char *fake_devname = NULL;
+
mdata = cifs_compose_mount_options(cifs_sb->ctx->mount_options,
- full_path + 1, &referral);
+ full_path + 1, &referral,
+ &fake_devname);
free_dfs_info_param(&referral);
if (IS_ERR(mdata)) {
rc = PTR_ERR(mdata);
mdata = NULL;
} else {
- smb3_cleanup_fs_context_contents(ctx);
- rc = cifs_setup_volume_info(ctx);
+ rc = cifs_setup_volume_info(ctx, mdata, fake_devname);
}
+ kfree(fake_devname);
kfree(cifs_sb->ctx->mount_options);
cifs_sb->ctx->mount_options = mdata;
}
@@ -3036,6 +3039,7 @@ static int setup_dfs_tgt_conn(const char *path, const char *full_path,
struct dfs_info3_param ref = {0};
char *mdata = NULL;
struct smb3_fs_context fake_ctx = {NULL};
+ char *fake_devname = NULL;
cifs_dbg(FYI, "%s: dfs path: %s\n", __func__, path);
@@ -3044,16 +3048,18 @@ static int setup_dfs_tgt_conn(const char *path, const char *full_path,
return rc;
mdata = cifs_compose_mount_options(cifs_sb->ctx->mount_options,
- full_path + 1, &ref);
+ full_path + 1, &ref,
+ &fake_devname);
free_dfs_info_param(&ref);
if (IS_ERR(mdata)) {
rc = PTR_ERR(mdata);
mdata = NULL;
} else
- rc = cifs_setup_volume_info(&fake_ctx);
+ rc = cifs_setup_volume_info(&fake_ctx, mdata, fake_devname);
kfree(mdata);
+ kfree(fake_devname);
if (!rc) {
/*
@@ -3122,10 +3128,24 @@ static int do_dfs_failover(const char *path, const char *full_path, struct cifs_
* we should pass a clone of the original context?
*/
int
-cifs_setup_volume_info(struct smb3_fs_context *ctx)
+cifs_setup_volume_info(struct smb3_fs_context *ctx, const char *mntopts, const char *devname)
{
int rc = 0;
+ smb3_parse_devname(devname, ctx);
+
+ if (mntopts) {
+ char *ip;
+
+ cifs_dbg(FYI, "%s: mntopts=%s\n", __func__, mntopts);
+ rc = smb3_parse_opt(mntopts, "ip", &ip);
+ if (!rc && !cifs_convert_address((struct sockaddr *)&ctx->dstaddr, ip,
+ strlen(ip))) {
+ cifs_dbg(VFS, "%s: failed to convert ip address\n", __func__);
+ return -EINVAL;
+ }
+ }
+
if (ctx->nullauth) {
cifs_dbg(FYI, "Anonymous login\n");
kfree(ctx->username);
diff --git a/fs/cifs/dfs_cache.c b/fs/cifs/dfs_cache.c
index 0fdb0de7ff86..4950ab0486ae 100644
--- a/fs/cifs/dfs_cache.c
+++ b/fs/cifs/dfs_cache.c
@@ -1417,7 +1417,7 @@ static struct cifs_ses *find_root_ses(struct vol_info *vi,
int rc;
struct cache_entry *ce;
struct dfs_info3_param ref = {0};
- char *mdata = NULL;
+ char *mdata = NULL, *devname = NULL;
struct TCP_Server_Info *server;
struct cifs_ses *ses;
struct smb3_fs_context ctx = {NULL};
@@ -1444,7 +1444,8 @@ static struct cifs_ses *find_root_ses(struct vol_info *vi,
up_read(&htable_rw_lock);
- mdata = cifs_compose_mount_options(vi->mntdata, rpath, &ref);
+ mdata = cifs_compose_mount_options(vi->mntdata, rpath, &ref,
+ &devname);
free_dfs_info_param(&ref);
if (IS_ERR(mdata)) {
@@ -1453,7 +1454,7 @@ static struct cifs_ses *find_root_ses(struct vol_info *vi,
goto out;
}
- rc = cifs_setup_volume_info(&ctx);
+ rc = cifs_setup_volume_info(&ctx, NULL, devname);
if (rc) {
ses = ERR_PTR(rc);
@@ -1472,6 +1473,7 @@ out:
smb3_cleanup_fs_context_contents(&ctx);
kfree(mdata);
kfree(rpath);
+ kfree(devname);
return ses;
}
diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c
index 27354417e988..5111aadfdb6b 100644
--- a/fs/cifs/fs_context.c
+++ b/fs/cifs/fs_context.c
@@ -401,6 +401,37 @@ cifs_parse_smb_version(char *value, struct smb3_fs_context *ctx, bool is_smb3)
return 0;
}
+int smb3_parse_opt(const char *options, const char *key, char **val)
+{
+ int rc = -ENOENT;
+ char *opts, *orig, *p;
+
+ orig = opts = kstrdup(options, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ while ((p = strsep(&opts, ","))) {
+ char *nval;
+
+ if (!*p)
+ continue;
+ if (strncasecmp(p, key, strlen(key)))
+ continue;
+ nval = strchr(p, '=');
+ if (nval) {
+ if (nval == p)
+ continue;
+ *nval++ = 0;
+ *val = kstrndup(nval, strlen(nval), GFP_KERNEL);
+ rc = !*val ? -ENOMEM : 0;
+ goto out;
+ }
+ }
+out:
+ kfree(orig);
+ return rc;
+}
+
/*
* Parse a devname into substrings and populate the ctx->UNC and ctx->prepath
* fields with the result. Returns 0 on success and an error otherwise
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 01:19:45 +0000