X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=props.c;h=e4edba06e573353a5a466282044d432499b59e92;hb=acd4df738165e1e4b16e199ee70b77d3e64a260a;hp=763fd57e019fbbf2397fa0597829436da111d5ae;hpb=85be2aaf913f0e234058c56fab460c5d7a2c084b;p=platform%2Fupstream%2Fbtrfs-progs.git

diff --git a/props.c b/props.c
index 763fd57..e4edba0 100644
--- a/props.c
+++ b/props.c
@@ -16,70 +16,62 @@
 
 #include <sys/stat.h>
 #include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/xattr.h>
 #include <fcntl.h>
 #include <unistd.h>
 
+#include <btrfsutil.h>
+
 #include "ctree.h"
 #include "commands.h"
 #include "utils.h"
 #include "props.h"
 
+#define XATTR_BTRFS_PREFIX     "btrfs."
+#define XATTR_BTRFS_PREFIX_LEN (sizeof(XATTR_BTRFS_PREFIX) - 1)
+
+/*
+ * Defined as synonyms in attr/xattr.h
+ */
+#ifndef ENOATTR
+#define ENOATTR ENODATA
+#endif
+
 static int prop_read_only(enum prop_object_type type,
 			  const char *object,
 			  const char *name,
 			  const char *value)
 {
-	int ret = 0;
-	int fd = -1;
-	u64 flags = 0;
-
-	fd = open(object, O_RDONLY);
-	if (fd < 0) {
-		ret = -errno;
-		fprintf(stderr, "ERROR: open %s failed. %s\n",
-				object, strerror(-ret));
-		goto out;
-	}
-
-	ret = ioctl(fd, BTRFS_IOC_SUBVOL_GETFLAGS, &flags);
-	if (ret < 0) {
-		ret = -errno;
-		fprintf(stderr, "ERROR: failed to get flags for %s. %s\n",
-				object, strerror(-ret));
-		goto out;
-	}
+	enum btrfs_util_error err;
+	bool read_only;
 
-	if (!value) {
-		if (flags & BTRFS_SUBVOL_RDONLY)
-			fprintf(stdout, "ro=true\n");
-		else
-			fprintf(stdout, "ro=false\n");
-		ret = 0;
-		goto out;
-	}
+	if (value) {
+		if (!strcmp(value, "true")) {
+			read_only = true;
+		} else if (!strcmp(value, "false")) {
+			read_only = false;
+		} else {
+			error("invalid value for property: %s", value);
+			return -EINVAL;
+		}
 
-	if (!strcmp(value, "true")) {
-		flags |= BTRFS_SUBVOL_RDONLY;
-	} else if (!strcmp(value, "false")) {
-		flags = flags & ~BTRFS_SUBVOL_RDONLY;
+		err = btrfs_util_set_subvolume_read_only(object, read_only);
+		if (err) {
+			error_btrfs_util(err);
+			return -errno;
+		}
 	} else {
-		ret = -EINVAL;
-		fprintf(stderr, "ERROR: invalid value for property.\n");
-		goto out;
-	}
+		err = btrfs_util_get_subvolume_read_only(object, &read_only);
+		if (err) {
+			error_btrfs_util(err);
+			return -errno;
+		}
 
-	ret = ioctl(fd, BTRFS_IOC_SUBVOL_SETFLAGS, &flags);
-	if (ret < 0) {
-		ret = -errno;
-		fprintf(stderr, "ERROR: failed to set flags for %s. %s\n",
-				object, strerror(-ret));
-		goto out;
+		printf("ro=%s\n", read_only ? "true" : "false");
 	}
 
-out:
-	if (fd != -1)
-		close(fd);
-	return ret;
+	return 0;
 }
 
 static int prop_label(enum prop_object_type type,
@@ -102,9 +94,85 @@ static int prop_label(enum prop_object_type type,
 	return ret;
 }
 
+static int prop_compression(enum prop_object_type type,
+			    const char *object,
+			    const char *name,
+			    const char *value)
+{
+	int ret;
+	ssize_t sret;
+	int fd = -1;
+	DIR *dirstream = NULL;
+	char *buf = NULL;
+	char *xattr_name = NULL;
+	int open_flags = value ? O_RDWR : O_RDONLY;
+
+	fd = open_file_or_dir3(object, &dirstream, open_flags);
+	if (fd == -1) {
+		ret = -errno;
+		error("failed to open %s: %s", object, strerror(-ret));
+		goto out;
+	}
+
+	xattr_name = malloc(XATTR_BTRFS_PREFIX_LEN + strlen(name) + 1);
+	if (!xattr_name) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	memcpy(xattr_name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN);
+	memcpy(xattr_name + XATTR_BTRFS_PREFIX_LEN, name, strlen(name));
+	xattr_name[XATTR_BTRFS_PREFIX_LEN + strlen(name)] = '\0';
+
+	if (value) {
+		if (strcmp(value, "no") == 0 || strcmp(value, "none") == 0)
+			value = "";
+		sret = fsetxattr(fd, xattr_name, value, strlen(value), 0);
+	} else {
+		sret = fgetxattr(fd, xattr_name, NULL, 0);
+	}
+	if (sret < 0) {
+		ret = -errno;
+		if (ret != -ENOATTR)
+			error("failed to %s compression for %s: %s",
+			      value ? "set" : "get", object, strerror(-ret));
+		else
+			ret = 0;
+		goto out;
+	}
+	if (!value) {
+		size_t len = sret;
+
+		buf = malloc(len);
+		if (!buf) {
+			ret = -ENOMEM;
+			goto out;
+		}
+		sret = fgetxattr(fd, xattr_name, buf, len);
+		if (sret < 0) {
+			ret = -errno;
+			error("failed to get compression for %s: %s",
+			      object, strerror(-ret));
+			goto out;
+		}
+		fprintf(stdout, "compression=%.*s\n", (int)len, buf);
+	}
+
+	ret = 0;
+out:
+	free(xattr_name);
+	free(buf);
+	if (fd >= 0)
+		close_file_or_dir(fd, dirstream);
+
+	return ret;
+}
+
 const struct prop_handler prop_handlers[] = {
 	{"ro", "Set/get read-only flag of subvolume.", 0, prop_object_subvol,
 	 prop_read_only},
-	{"label", "Set/get label of device.", 0, prop_object_dev, prop_label},
-	{0, 0, 0, 0, 0}
+	{"label", "Set/get label of device.", 0,
+	 prop_object_dev | prop_object_root, prop_label},
+	{"compression", "Set/get compression for a file or directory", 0,
+	 prop_object_inode, prop_compression},
+	{NULL, NULL, 0, 0, NULL}
 };