X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=props.c;h=cddbd9272fe45bc18479dbae03a2c76d45d47a44;hb=dc06cda3d6afb4fad5ddfd1508a33f79c2e68efb;hp=12fdc52466ac46b6bf285065d41f52971f713b4b;hpb=aea978980040462160196597d2b0ca0527af1600;p=platform%2Fupstream%2Fbtrfs-progs.git diff --git a/props.c b/props.c index 12fdc52..cddbd92 100644 --- a/props.c +++ b/props.c @@ -16,6 +16,8 @@ #include #include +#include +#include #include #include @@ -24,6 +26,16 @@ #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, @@ -36,16 +48,15 @@ static int prop_read_only(enum prop_object_type type, fd = open(object, O_RDONLY); if (fd < 0) { ret = -errno; - fprintf(stderr, "ERROR: open %s failed. %s\n", - object, strerror(-ret)); + error("failed to open %s: %s", 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)); + error("failed to get flags for %s: %s", object, + strerror(-ret)); goto out; } @@ -64,15 +75,15 @@ static int prop_read_only(enum prop_object_type type, flags = flags & ~BTRFS_SUBVOL_RDONLY; } else { ret = -EINVAL; - fprintf(stderr, "ERROR: invalid value for property.\n"); + error("invalid value for property: %s", value); goto out; } 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)); + error("failed to set flags for %s: %s", object, + strerror(-ret)); goto out; } @@ -102,10 +113,85 @@ 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_object_root, prop_label}, - {0, 0, 0, 0, 0} + {"compression", "Set/get compression for a file or directory", 0, + prop_object_inode, prop_compression}, + {NULL, NULL, 0, 0, NULL} };