diff options
Diffstat (limited to 'fs/cifs/cifsfs.c')
| -rw-r--r-- | fs/cifs/cifsfs.c | 56 |
1 files changed, 54 insertions, 2 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 093beaa3900d..e9f4ec701092 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -44,6 +44,7 @@ #include "cifs_fs_sb.h" #include <linux/mm.h> #include <linux/key-type.h> +#include "dns_resolve.h" #include "cifs_spnego.h" #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ @@ -96,6 +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? */ @@ -105,6 +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) { @@ -154,6 +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); @@ -177,6 +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; @@ -435,6 +471,10 @@ static void cifs_umount_begin(struct vfsmount *vfsmnt, int flags) struct cifs_sb_info *cifs_sb; struct cifsTconInfo *tcon; +#ifdef CONFIG_CIFS_DFS_UPCALL + dfs_shrink_umount_helper(vfsmnt); +#endif /* CONFIG CIFS_DFS_UPCALL */ + if (!(flags & MNT_FORCE)) return; cifs_sb = CIFS_SB(vfsmnt->mnt_sb); @@ -552,7 +592,7 @@ 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, @@ -1015,11 +1055,16 @@ init_cifs(void) if (rc) goto out_unregister_filesystem; #endif +#ifdef CONFIG_CIFS_DFS_UPCALL + rc = register_key_type(&key_type_dns_resolver); + if (rc) + goto out_unregister_key_type; +#endif oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd"); if (IS_ERR(oplockThread)) { rc = PTR_ERR(oplockThread); cERROR(1, ("error %d create oplock thread", rc)); - goto out_unregister_key_type; + goto out_unregister_dfs_key_type; } dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd"); @@ -1033,7 +1078,11 @@ init_cifs(void) out_stop_oplock_thread: kthread_stop(oplockThread); + out_unregister_dfs_key_type: +#ifdef CONFIG_CIFS_DFS_UPCALL + unregister_key_type(&key_type_dns_resolver); out_unregister_key_type: +#endif #ifdef CONFIG_CIFS_UPCALL unregister_key_type(&cifs_spnego_key_type); out_unregister_filesystem: @@ -1059,6 +1108,9 @@ exit_cifs(void) #ifdef CONFIG_PROC_FS cifs_proc_clean(); #endif +#ifdef CONFIG_CIFS_DFS_UPCALL + unregister_key_type(&key_type_dns_resolver); +#endif #ifdef CONFIG_CIFS_UPCALL unregister_key_type(&cifs_spnego_key_type); #endif |