X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=fs%2Fcifs%2Fxattr.c;h=18fcec190f8b5c6e4fdb6f5856ed114a473a411e;hb=refs%2Fheads%2Fvserver;hp=dd6a2c08cd73f01ae6cfbb858217a9f387200b2d;hpb=9213980e6a70d8473e0ffd4b39ab5b6caaba9ff5;p=linux-2.6.git

diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index dd6a2c08c..18fcec190 100644
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -20,33 +20,300 @@
  */
 
 #include <linux/fs.h>
+#include <linux/posix_acl_xattr.h>
 #include "cifsfs.h"
 #include "cifspdu.h"
 #include "cifsglob.h"
 #include "cifsproto.h"
 #include "cifs_debug.h"
 
-int cifs_removexattr(struct dentry * direntry, const char * name)
+#define MAX_EA_VALUE_SIZE 65535
+#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib"
+#define CIFS_XATTR_USER_PREFIX "user."
+#define CIFS_XATTR_SYSTEM_PREFIX "system."
+#define CIFS_XATTR_OS2_PREFIX "os2."
+#define CIFS_XATTR_SECURITY_PREFIX ".security"
+#define CIFS_XATTR_TRUSTED_PREFIX "trusted."
+#define XATTR_TRUSTED_PREFIX_LEN  8
+#define XATTR_SECURITY_PREFIX_LEN 9
+/* BB need to add server (Samba e.g) support for security and trusted prefix */
+  
+
+
+int cifs_removexattr(struct dentry * direntry, const char * ea_name)
 {
 	int rc = -EOPNOTSUPP;
+#ifdef CONFIG_CIFS_XATTR
+	int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct cifsTconInfo *pTcon;
+	struct super_block * sb;
+	char * full_path;
+                                                                                     
+	if(direntry == NULL)
+		return -EIO;
+	if(direntry->d_inode == NULL)
+		return -EIO;
+	sb = direntry->d_inode->i_sb;
+	if(sb == NULL)
+		return -EIO;
+	xid = GetXid();
+                                                                                     
+	cifs_sb = CIFS_SB(sb);
+	pTcon = cifs_sb->tcon;
+                                                                                     
+	full_path = build_path_from_dentry(direntry);
+	if(full_path == NULL) {
+		FreeXid(xid);
+		return -ENOMEM;
+	}
+	if(ea_name == NULL) {
+		cFYI(1,("Null xattr names not supported"));
+	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5)
+		&& (strncmp(ea_name,CIFS_XATTR_OS2_PREFIX,4))) {
+		cFYI(1,("illegal xattr namespace %s (only user namespace supported)",ea_name));
+		/* BB what if no namespace prefix? */
+		/* Should we just pass them to server, except for
+		system and perhaps security prefixes? */
+	} else {
+		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto remove_ea_exit;
+
+		ea_name+=5; /* skip past user. prefix */
+		rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,NULL,
+			(__u16)0, cifs_sb->local_nls,
+			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+	}
+remove_ea_exit:
+	kfree(full_path);
+	FreeXid(xid);
+#endif
 	return rc;
 }
 
-int cifs_setxattr(struct dentry * direntry, const char * name,
-        const void * value, size_t size, int flags)
+int cifs_setxattr(struct dentry * direntry, const char * ea_name,
+        const void * ea_value, size_t value_size, int flags)
 {
 	int rc = -EOPNOTSUPP;
+#ifdef CONFIG_CIFS_XATTR
+	int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct cifsTconInfo *pTcon;
+	struct super_block * sb;
+	char * full_path;
+
+	if(direntry == NULL)
+		return -EIO;
+	if(direntry->d_inode == NULL)
+		return -EIO;
+	sb = direntry->d_inode->i_sb;
+	if(sb == NULL)
+		return -EIO;
+	xid = GetXid();
+
+	cifs_sb = CIFS_SB(sb);
+	pTcon = cifs_sb->tcon;
+
+	full_path = build_path_from_dentry(direntry);
+	if(full_path == NULL) {
+		FreeXid(xid);
+		return -ENOMEM;
+	}
+	/* return dos attributes as pseudo xattr */
+	/* return alt name if available as pseudo attr */
+
+	/* if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to 
+		returns as xattrs */
+	if(value_size > MAX_EA_VALUE_SIZE) {
+		cFYI(1,("size of EA value too large"));
+		kfree(full_path);
+		FreeXid(xid);
+		return -EOPNOTSUPP;
+	}
+
+	if(ea_name == NULL) {
+		cFYI(1,("Null xattr names not supported"));
+	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5) == 0) {
+		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto set_ea_exit;
+		if(strncmp(ea_name,CIFS_XATTR_DOS_ATTRIB,14) == 0) {
+			cFYI(1,("attempt to set cifs inode metadata"));
+		}
+		ea_name += 5; /* skip past user. prefix */
+		rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,ea_value,
+			(__u16)value_size, cifs_sb->local_nls,
+			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+	} else if(strncmp(ea_name, CIFS_XATTR_OS2_PREFIX,4) == 0) {
+		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto set_ea_exit;
+
+		ea_name += 4; /* skip past os2. prefix */
+		rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,ea_value,
+			(__u16)value_size, cifs_sb->local_nls,
+			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+	} else {
+		int temp; 
+		temp = strncmp(ea_name,POSIX_ACL_XATTR_ACCESS,
+			strlen(POSIX_ACL_XATTR_ACCESS));
+		if (temp == 0) {
+#ifdef CONFIG_CIFS_POSIX
+			if(sb->s_flags & MS_POSIXACL)
+				rc = CIFSSMBSetPosixACL(xid, pTcon,full_path,
+					ea_value, (const int)value_size, 
+					ACL_TYPE_ACCESS,cifs_sb->local_nls,
+					cifs_sb->mnt_cifs_flags & 
+						CIFS_MOUNT_MAP_SPECIAL_CHR);
+			cFYI(1,("set POSIX ACL rc %d",rc));
+#else
+			cFYI(1,("set POSIX ACL not supported"));
+#endif
+		} else if(strncmp(ea_name,POSIX_ACL_XATTR_DEFAULT,strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
+#ifdef CONFIG_CIFS_POSIX
+			if(sb->s_flags & MS_POSIXACL)
+				rc = CIFSSMBSetPosixACL(xid, pTcon,full_path,
+					ea_value, (const int)value_size, 
+					ACL_TYPE_DEFAULT, cifs_sb->local_nls,
+					cifs_sb->mnt_cifs_flags & 
+						CIFS_MOUNT_MAP_SPECIAL_CHR);
+			cFYI(1,("set POSIX default ACL rc %d",rc));
+#else
+			cFYI(1,("set default POSIX ACL not supported"));
+#endif
+		} else {
+			cFYI(1,("illegal xattr request %s (only user namespace supported)",ea_name));
+		  /* BB what if no namespace prefix? */
+		  /* Should we just pass them to server, except for 
+		  system and perhaps security prefixes? */
+		}
+	}
+
+set_ea_exit:
+	kfree(full_path);
+	FreeXid(xid);
+#endif
 	return rc;
 }
 
-ssize_t cifs_getxattr(struct dentry * direntry, const char * name,
-         void * value, size_t size)
+ssize_t cifs_getxattr(struct dentry * direntry, const char * ea_name,
+         void * ea_value, size_t buf_size)
 {
 	ssize_t rc = -EOPNOTSUPP;
+#ifdef CONFIG_CIFS_XATTR
+	int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct cifsTconInfo *pTcon;
+	struct super_block * sb;
+	char * full_path;
+
+	if(direntry == NULL)
+		return -EIO;
+	if(direntry->d_inode == NULL)
+		return -EIO;
+	sb = direntry->d_inode->i_sb;
+	if(sb == NULL)
+		return -EIO;
+
+	xid = GetXid();
+
+	cifs_sb = CIFS_SB(sb);
+	pTcon = cifs_sb->tcon;
+
+	full_path = build_path_from_dentry(direntry);
+	if(full_path == NULL) {
+		FreeXid(xid);
+		return -ENOMEM;
+	}
+	/* return dos attributes as pseudo xattr */
+	/* return alt name if available as pseudo attr */
+	if(ea_name == NULL) {
+		cFYI(1,("Null xattr names not supported"));
+	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5) == 0) {
+		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto get_ea_exit;
+
+		if(strncmp(ea_name,CIFS_XATTR_DOS_ATTRIB,14) == 0) {
+			cFYI(1,("attempt to query cifs inode metadata"));
+			/* revalidate/getattr then populate from inode */
+		} /* BB add else when above is implemented */
+		ea_name += 5; /* skip past user. prefix */
+		rc = CIFSSMBQueryEA(xid,pTcon,full_path,ea_name,ea_value,
+			buf_size, cifs_sb->local_nls,
+			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+	} else if(strncmp(ea_name, CIFS_XATTR_OS2_PREFIX,4) == 0) {
+		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto get_ea_exit;
+
+		ea_name += 4; /* skip past os2. prefix */
+		rc = CIFSSMBQueryEA(xid,pTcon,full_path,ea_name,ea_value,
+			buf_size, cifs_sb->local_nls,
+			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+	} else if(strncmp(ea_name,POSIX_ACL_XATTR_ACCESS,
+			  strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
+#ifdef CONFIG_CIFS_POSIX
+		if(sb->s_flags & MS_POSIXACL)
+			rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
+				ea_value, buf_size, ACL_TYPE_ACCESS, 
+				cifs_sb->local_nls,
+				cifs_sb->mnt_cifs_flags & 
+					CIFS_MOUNT_MAP_SPECIAL_CHR);
+/*		else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
+			__u16 fid;
+			int oplock = FALSE;
+			rc = CIFSSMBOpen(xid, pTcon, full_path,
+					 FILE_OPEN, GENERIC_READ, 0, &fid,
+					 &oplock, NULL, cifs_sb->local_nls,
+					 cifs_sb->mnt_cifs_flags &
+					 CIFS_MOUNT_MAP_SPECIAL_CHR);
+			if(rc == 0) {
+				rc = CIFSSMBGetCIFSACL(xid, pTcon, fid,
+					ea_value, buf_size,
+					ACL_TYPE_ACCESS);
+				CIFSSMBClose(xid, pTcon, fid);
+			}
+		} */  /* BB enable after fixing up return data */
+                  		
+#else 
+		cFYI(1,("query POSIX ACL not supported yet"));
+#endif /* CONFIG_CIFS_POSIX */
+	} else if(strncmp(ea_name,POSIX_ACL_XATTR_DEFAULT,
+			  strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
+#ifdef CONFIG_CIFS_POSIX
+		if(sb->s_flags & MS_POSIXACL)
+			rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
+				ea_value, buf_size, ACL_TYPE_DEFAULT, 
+				cifs_sb->local_nls,
+				cifs_sb->mnt_cifs_flags & 
+					CIFS_MOUNT_MAP_SPECIAL_CHR);
+#else 
+		cFYI(1,("query POSIX default ACL not supported yet"));
+#endif
+	} else if(strncmp(ea_name,
+		  CIFS_XATTR_TRUSTED_PREFIX,XATTR_TRUSTED_PREFIX_LEN) == 0) {
+		cFYI(1,("Trusted xattr namespace not supported yet"));
+	} else if(strncmp(ea_name,
+		  CIFS_XATTR_SECURITY_PREFIX,XATTR_SECURITY_PREFIX_LEN) == 0) {
+		cFYI(1,("Security xattr namespace not supported yet"));
+	} else {
+		cFYI(1,("illegal xattr name request %s (only user namespace supported)",ea_name));
+	}
+
+	/* We could add an additional check for streams ie 
+	    if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to 
+		returns as xattrs */
+
+	if(rc == -EINVAL)
+		rc = -EOPNOTSUPP; 
+
+get_ea_exit:
+	kfree(full_path);
+	FreeXid(xid);
+#endif
 	return rc;
 }
 
-ssize_t cifs_listxattr(struct dentry * direntry, char * ea_data, size_t ea_size)
+ssize_t cifs_listxattr(struct dentry * direntry, char * data, size_t buf_size)
 {
 	ssize_t rc = -EOPNOTSUPP;
 #ifdef CONFIG_CIFS_XATTR
@@ -55,6 +322,7 @@ ssize_t cifs_listxattr(struct dentry * direntry, char * ea_data, size_t ea_size)
 	struct cifsTconInfo *pTcon;
 	struct super_block * sb;
 	char * full_path;
+
 	if(direntry == NULL)
 		return -EIO;
 	if(direntry->d_inode == NULL)
@@ -62,25 +330,32 @@ ssize_t cifs_listxattr(struct dentry * direntry, char * ea_data, size_t ea_size)
 	sb = direntry->d_inode->i_sb;
 	if(sb == NULL)
 		return -EIO;
-	xid = GetXid();
 
 	cifs_sb = CIFS_SB(sb);
 	pTcon = cifs_sb->tcon;
 
-	down(&sb->s_vfs_rename_sem);
+	if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+		return -EOPNOTSUPP;
+
+	xid = GetXid();
+
 	full_path = build_path_from_dentry(direntry);
-	up(&sb->s_vfs_rename_sem);
 	if(full_path == NULL) {
 		FreeXid(xid);
 		return -ENOMEM;
 	}
-	/* return dosattributes as pseudo xattr */
+	/* return dos attributes as pseudo xattr */
 	/* return alt name if available as pseudo attr */
 
 	/* if proc/fs/cifs/streamstoxattr is set then
 		search server for EAs or streams to 
 		returns as xattrs */
-	rc = CIFSSMBQAllEAs(xid,pTcon,full_path,ea_data,ea_size,cifs_sb->local_nls);
+	rc = CIFSSMBQAllEAs(xid,pTcon,full_path,data,buf_size,
+				cifs_sb->local_nls,
+				cifs_sb->mnt_cifs_flags & 
+					CIFS_MOUNT_MAP_SPECIAL_CHR);
+
+	kfree(full_path);
 	FreeXid(xid);
 #endif
 	return rc;