Attachment 5470 Details for Bug 7175 – patch to return CIFS file creation time in extended attribute

[patch] patch to return CIFS file creation time in extended attribute

crtime.diff (text/plain), 3.19 KB, created by George Powers (mail address dead) on 2010-03-08 10:59:19 UTC

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Creator: George Powers (mail address dead)

Created: 2010-03-08 10:59:19 UTC

Size: 3.19 KB

patch

obsolete

>diff -rub linux-2.6.33/fs/cifs/cifssmb.c linux-2.6.33.crtime/fs/cifs/cifssmb.c
>--- linux-2.6.33/fs/cifs/cifssmb.c	2010-03-05 16:20:12.000000000 -0800
>+++ linux-2.6.33.crtime/fs/cifs/cifssmb.c	2010-03-08 07:52:06.000000000 -0800
>@@ -5417,6 +5417,22 @@
> 	if (rc == -EAGAIN)
> 		goto QAllEAsRetry;
> 
>+	/* Pseudo-xattr returns file creation time.
>+	 * Samba bug 7175, CGN bug 5131 -GAP 3/3/10
>+	 */
>+	{
>+		static const char *crtime_name = "user.crtime";
>+		int crtime_len = strlen(crtime_name) + 1;
>+		if (EAData != NULL && buf_size > crtime_len && rc >= 0) {
>+			memcpy(EAData, crtime_name, crtime_len);
>+			EAData += crtime_len;
>+			rc += crtime_len;
>+			buf_size -= crtime_len;
>+		}
>+		else if (buf_size == 0 && rc >= 0) {
>+			rc += crtime_len;
>+		}
>+	}
> 	return (ssize_t)rc;
> }
> 
>diff -rub linux-2.6.33/fs/cifs/xattr.c linux-2.6.33.crtime/fs/cifs/xattr.c
>--- linux-2.6.33/fs/cifs/xattr.c	2010-03-05 16:20:12.000000000 -0800
>+++ linux-2.6.33.crtime/fs/cifs/xattr.c	2010-03-08 07:52:06.000000000 -0800
>@@ -38,6 +38,10 @@
> #define XATTR_SECURITY_PREFIX_LEN 9
> /* BB need to add server (Samba e.g) support for security and trusted prefix */
> 
>+/* Pseudo-xattr returns file creation time.
>+ * Samba bug 7175, CGN bug 5131 -GAP 3/3/10
>+ */
>+#define CIFS_XATTR_CRTIME "user.crtime"
> 
> 
> int cifs_removexattr(struct dentry *direntry, const char *ea_name)
>@@ -201,6 +205,45 @@
> 	return rc;
> }
> 
>+
>+/* Pseudo-xattr returns file creation time.
>+ * Samba bug 7175, CGN bug 5131 -GAP 3/3/10
>+ */
>+static int cifs_get_crtime(const unsigned char *full_path, struct super_block *sb,
>+	int xid, void *ea_value, size_t buf_size)
>+{
>+	int rc = 0;
>+	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
>+	struct cifsTconInfo *pTcon = cifs_sb->tcon;
>+	FILE_ALL_INFO *pfindData = NULL;
>+	struct timespec creation_time = {0};
>+	u64 crtime = 0;
>+
>+	if (buf_size == 0)
>+		return sizeof crtime;
>+	if (buf_size < sizeof crtime)
>+		return -ERANGE;
>+	if (ea_value == NULL)
>+		return -EINVAL;
>+	pfindData = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
>+	if (pfindData == NULL)
>+		return -ENOMEM;
>+
>+	rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
>+			0 /* not legacy */,
>+			cifs_sb->local_nls,
>+			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
>+
>+	if (rc == 0) {
>+		creation_time = cifs_NTtimeToUnix(le64_to_cpu(pfindData->CreationTime));
>+		crtime = creation_time.tv_sec;  // discard the nanosecs
>+		memcpy(ea_value, &crtime, sizeof crtime);
>+		rc = sizeof crtime;
>+	}
>+	kfree(pfindData);
>+	return rc;
>+}
>+
> ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
> 	void *ea_value, size_t buf_size)
> {
>@@ -235,6 +278,14 @@
> 	/* 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_CRTIME, strlen(CIFS_XATTR_CRTIME)) == 0) {
>+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
>+			goto get_ea_exit;
>+		/* Pseudo-xattr returns file creation time.
>+		 * Samba bug 7175, CGN bug 5131 -GAP 3/3/10
>+		 */
>+		rc = cifs_get_crtime(full_path, sb, xid, ea_value, buf_size);
>+		cFYI(1, ("%s(%s), rc=%d", __FUNCTION__, full_path, rc));
> 	} 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;

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Attachments on bug 7175: 5470