Merge with /pub/scm/linux/kernel/git/sfrench/cifs-2.6.git/

1 files changed, 100 insertions, 8 deletions

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index d335269bd91c..8dfe717a332a 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -48,6 +48,7 @@ build_path_from_dentry(struct dentry *direntry)
         struct dentry *temp;
         int namelen = 0;
         char *full_path;
+        char dirsep = CIFS_DIR_SEP(CIFS_SB(direntry->d_sb));
 
         if(direntry == NULL)
                 return NULL;  /* not much we can do if dentry is freed and
@@ -74,7 +75,7 @@ cifs_bp_rename_retry:
                 if (namelen < 0) {
                         break;
                 } else {
-                        full_path[namelen] = '\\';
+                        full_path[namelen] = dirsep;
                         strncpy(full_path + namelen + 1, temp->d_name.name,
                                 temp->d_name.len);
                         cFYI(0, (" name: %s ", full_path + namelen));
@@ -183,6 +184,13 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                          desiredAccess, CREATE_NOT_DIR,
                          &fileHandle, &oplock, buf, cifs_sb->local_nls,
                          cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+        if(rc == -EIO) {
+                /* old server, retry the open legacy style */
+                rc = SMBLegacyOpen(xid, pTcon, full_path, disposition,
+                        desiredAccess, CREATE_NOT_DIR,
+                        &fileHandle, &oplock, buf, cifs_sb->local_nls,
+                        cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+        } 
         if (rc) {
                 cFYI(1, ("cifs_create returned 0x%x ", rc));
         } else {
@@ -208,7 +216,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
                         }
                 else {
-                        /* BB implement via Windows security descriptors */
+                        /* BB implement mode setting via Windows security descriptors */
                         /* eg CIFSSMBWinSetPerms(xid,pTcon,full_path,mode,-1,-1,local_nls);*/
                         /* could set r/o dos attribute if mode & 0222 == 0 */
                 }
@@ -225,10 +233,14 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                 }
 
                 if (rc != 0) {
-                        cFYI(1,("Create worked but get_inode_info failed with rc = %d",
+                        cFYI(1,
+                             ("Create worked but get_inode_info failed rc = %d",
                               rc));
                 } else {
-                        direntry->d_op = &cifs_dentry_ops;
+                        if (pTcon->nocase)
+                                direntry->d_op = &cifs_ci_dentry_ops;
+                        else
+                                direntry->d_op = &cifs_dentry_ops;
                         d_instantiate(direntry, newinode);
                 }
                 if((nd->flags & LOOKUP_OPEN) == FALSE) {
@@ -302,8 +314,7 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, dev_t dev
         up(&direntry->d_sb->s_vfs_rename_sem);
         if(full_path == NULL)
                 rc = -ENOMEM;
-        
-        if (full_path && (pTcon->ses->capabilities & CAP_UNIX)) {
+        else if (pTcon->ses->capabilities & CAP_UNIX) {
                 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
                         rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path,
                                 mode,(__u64)current->euid,(__u64)current->egid,
@@ -321,10 +332,49 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, dev_t dev
                 if(!rc) {
                         rc = cifs_get_inode_info_unix(&newinode, full_path,
                                                 inode->i_sb,xid);
-                        direntry->d_op = &cifs_dentry_ops;
+                        if (pTcon->nocase)
+                                direntry->d_op = &cifs_ci_dentry_ops;
+                        else
+                                direntry->d_op = &cifs_dentry_ops;
                         if(rc == 0)
                                 d_instantiate(direntry, newinode);
                 }
+        } else {
+                if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+                        int oplock = 0;
+                        u16 fileHandle;
+                        FILE_ALL_INFO * buf;
+
+                        cFYI(1,("sfu compat create special file"));
+
+                        buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL);
+                        if(buf == NULL) {
+                                kfree(full_path);
+                                FreeXid(xid);
+                                return -ENOMEM;
+                        }
+
+                        rc = CIFSSMBOpen(xid, pTcon, full_path,
+                                         FILE_CREATE, /* fail if exists */
+                                         GENERIC_WRITE /* BB would 
+                                          WRITE_OWNER | WRITE_DAC be better? */,
+                                         /* Create a file and set the
+                                            file attribute to SYSTEM */
+                                         CREATE_NOT_DIR | CREATE_OPTION_SPECIAL,
+                                         &fileHandle, &oplock, buf,
+                                         cifs_sb->local_nls,
+                                         cifs_sb->mnt_cifs_flags & 
+                                            CIFS_MOUNT_MAP_SPECIAL_CHR);
+
+                        if(!rc) {
+                                /* BB Do not bother to decode buf since no
+                                   local inode yet to put timestamps in */
+                                CIFSSMBClose(xid, pTcon, fileHandle);
+                                d_drop(direntry);
+                        }
+                        kfree(buf);
+                        /* add code here to set EAs */
+                }
         }
 
         kfree(full_path);
@@ -381,7 +431,10 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, struct name
                                          parent_dir_inode->i_sb,xid);
 
         if ((rc == 0) && (newInode != NULL)) {
-                direntry->d_op = &cifs_dentry_ops;
+                if (pTcon->nocase)
+                        direntry->d_op = &cifs_ci_dentry_ops;
+                else
+                        direntry->d_op = &cifs_dentry_ops;
                 d_add(direntry, newInode);
 
                 /* since paths are not looked up by component - the parent directories are presumed to be good here */
@@ -440,3 +493,42 @@ struct dentry_operations cifs_dentry_ops = {
 /* d_delete:       cifs_d_delete,       *//* not needed except for debugging */
         /* no need for d_hash, d_compare, d_release, d_iput ... yet. BB confirm this BB */
 };
+
+static int cifs_ci_hash(struct dentry *dentry, struct qstr *q)
+{
+        struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
+        unsigned long hash;
+        int i;
+
+        hash = init_name_hash();
+        for (i = 0; i < q->len; i++)
+                hash = partial_name_hash(nls_tolower(codepage, q->name[i]),
+                                         hash);
+        q->hash = end_name_hash(hash);
+
+        return 0;
+}
+
+static int cifs_ci_compare(struct dentry *dentry, struct qstr *a,
+                           struct qstr *b)
+{
+        struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
+
+        if ((a->len == b->len) &&
+            (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) {
+                /*
+                 * To preserve case, don't let an existing negative dentry's
+                 * case take precedence.  If a is not a negative dentry, this
+                 * should have no side effects
+                 */
+                memcpy((unsigned char *)a->name, b->name, a->len);
+                return 0;
+        }
+        return 1;
+}
+
+struct dentry_operations cifs_ci_dentry_ops = {
+        .d_revalidate = cifs_d_revalidate,
+        .d_hash = cifs_ci_hash,
+        .d_compare = cifs_ci_compare,
+};