cifs: add shutdown support

[linux-2.6-microblaze.git] / fs / cifs / link.c

diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 7c5878a..1cbe7ec 100644 (file)
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -30,6 +30,7 @@
 #include "cifs_fs_sb.h"
 #include "cifs_unicode.h"
 #include "smb2proto.h"
+#include "cifs_ioctl.h"
 
 /*
  * M-F Symlink Functions - Begin
@@ -510,25 +511,34 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode,
 {
        int rc = -EACCES;
        unsigned int xid;
-       char *from_name = NULL;
-       char *to_name = NULL;
+       const char *from_name, *to_name;
+       void *page1, *page2;
        struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
        struct tcon_link *tlink;
        struct cifs_tcon *tcon;
        struct TCP_Server_Info *server;
        struct cifsInodeInfo *cifsInode;
 
+       if (unlikely(cifs_forced_shutdown(cifs_sb)))
+               return -EIO;
+
        tlink = cifs_sb_tlink(cifs_sb);
        if (IS_ERR(tlink))
                return PTR_ERR(tlink);
        tcon = tlink_tcon(tlink);
 
        xid = get_xid();
+       page1 = alloc_dentry_path();
+       page2 = alloc_dentry_path();
 
-       from_name = build_path_from_dentry(old_file);
-       to_name = build_path_from_dentry(direntry);
-       if ((from_name == NULL) || (to_name == NULL)) {
-               rc = -ENOMEM;
+       from_name = build_path_from_dentry(old_file, page1);
+       if (IS_ERR(from_name)) {
+               rc = PTR_ERR(from_name);
+               goto cifs_hl_exit;
+       }
+       to_name = build_path_from_dentry(direntry, page2);
+       if (IS_ERR(to_name)) {
+               rc = PTR_ERR(to_name);
                goto cifs_hl_exit;
        }
 
@@ -587,8 +597,8 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode,
        }
 
 cifs_hl_exit:
-       kfree(from_name);
-       kfree(to_name);
+       free_dentry_path(page1);
+       free_dentry_path(page2);
        free_xid(xid);
        cifs_put_tlink(tlink);
        return rc;
@@ -600,7 +610,8 @@ cifs_get_link(struct dentry *direntry, struct inode *inode,
 {
        int rc = -ENOMEM;
        unsigned int xid;
-       char *full_path = NULL;
+       const char *full_path;
+       void *page;
        char *target_path = NULL;
        struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
        struct tcon_link *tlink = NULL;
@@ -620,11 +631,13 @@ cifs_get_link(struct dentry *direntry, struct inode *inode,
        tcon = tlink_tcon(tlink);
        server = tcon->ses->server;
 
-       full_path = build_path_from_dentry(direntry);
-       if (!full_path) {
+       page = alloc_dentry_path();
+       full_path = build_path_from_dentry(direntry, page);
+       if (IS_ERR(full_path)) {
                free_xid(xid);
                cifs_put_tlink(tlink);
-               return ERR_PTR(-ENOMEM);
+               free_dentry_path(page);
+               return ERR_CAST(full_path);
        }
 
        cifs_dbg(FYI, "Full path: %s inode = 0x%p\n", full_path, inode);
@@ -649,7 +662,7 @@ cifs_get_link(struct dentry *direntry, struct inode *inode,
                                                &target_path, reparse_point);
        }
 
-       kfree(full_path);
+       free_dentry_path(page);
        free_xid(xid);
        cifs_put_tlink(tlink);
        if (rc != 0) {
@@ -669,9 +682,13 @@ cifs_symlink(struct user_namespace *mnt_userns, struct inode *inode,
        struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
        struct tcon_link *tlink;
        struct cifs_tcon *pTcon;
-       char *full_path = NULL;
+       const char *full_path;
+       void *page = alloc_dentry_path();
        struct inode *newinode = NULL;
 
+       if (unlikely(cifs_forced_shutdown(cifs_sb)))
+               return -EIO;
+
        xid = get_xid();
 
        tlink = cifs_sb_tlink(cifs_sb);
@@ -681,9 +698,9 @@ cifs_symlink(struct user_namespace *mnt_userns, struct inode *inode,
        }
        pTcon = tlink_tcon(tlink);
 
-       full_path = build_path_from_dentry(direntry);
-       if (full_path == NULL) {
-               rc = -ENOMEM;
+       full_path = build_path_from_dentry(direntry, page);
+       if (IS_ERR(full_path)) {
+               rc = PTR_ERR(full_path);
                goto symlink_exit;
        }
 
@@ -719,7 +736,7 @@ cifs_symlink(struct user_namespace *mnt_userns, struct inode *inode,
                }
        }
 symlink_exit:
-       kfree(full_path);
+       free_dentry_path(page);
        cifs_put_tlink(tlink);
        free_xid(xid);
        return rc;