From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:25950 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754267Ab3A3J6b (ORCPT ); Wed, 30 Jan 2013 04:58:31 -0500 From: Anand Jain To: linux-btrfs@vger.kernel.org, dsterba@suse.cz, gene@czarc.net Subject: [PATCH 09/12] Btrfs-progs: add show subcommand to subvol cli Date: Wed, 30 Jan 2013 17:56:25 +0800 Message-Id: <1359539788-10667-10-git-send-email-anand.jain@oracle.com> In-Reply-To: <1359539788-10667-1-git-send-email-anand.jain@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: References: <1359539788-10667-1-git-send-email-anand.jain@oracle.com> This adds show sub-command to the btrfs subvol cli to display detailed inforamtion of the given subvol or snapshot. Signed-off-by: Anand Jain --- btrfs-list.c | 25 +++++++-- btrfs-list.h | 3 +- cmds-subvolume.c | 155 +++++++++++++++++++++++++++++++++++++++++++++++++++++-- man/btrfs.8.in | 6 +++ 4 files changed, 182 insertions(+), 7 deletions(-) diff --git a/btrfs-list.c b/btrfs-list.c index 20b84ab..545aa15 100644 --- a/btrfs-list.c +++ b/btrfs-list.c @@ -1336,6 +1336,22 @@ static void print_subvolume_column(struct root_info *subv, } } +static void print_single_volume_info_raw(struct root_info *subv, char *raw_prefix) +{ + int i; + + for (i = 0; i < BTRFS_LIST_ALL; i++) { + if (!btrfs_list_columns[i].need_print) + continue; + + if (raw_prefix) + printf("%s",raw_prefix); + + print_subvolume_column(subv, i); + } + printf("\n"); +} + static void print_single_volume_info_table(struct root_info *subv) { int i; @@ -1402,7 +1418,7 @@ static void print_all_volume_info_tab_head() } static void print_all_volume_info(struct root_lookup *sorted_tree, - int layout) + int layout, char *raw_prefix) { struct rb_node *n; struct root_info *entry; @@ -1420,6 +1436,9 @@ static void print_all_volume_info(struct root_lookup *sorted_tree, case BTRFS_LIST_LAYOUT_TABLE: print_single_volume_info_table(entry); break; + case BTRFS_LIST_LAYOUT_RAW: + print_single_volume_info_raw(entry, raw_prefix); + break; } n = rb_next(n); } @@ -1446,7 +1465,7 @@ int btrfs_list_subvols(int fd, struct root_lookup *root_lookup) int btrfs_list_subvols_print(int fd, struct btrfs_list_filter_set *filter_set, struct btrfs_list_comparer_set *comp_set, - int layout) + int layout, char *raw_prefix) { struct root_lookup root_lookup; struct root_lookup root_sort; @@ -1458,7 +1477,7 @@ int btrfs_list_subvols_print(int fd, struct btrfs_list_filter_set *filter_set, __filter_and_sort_subvol(&root_lookup, &root_sort, filter_set, comp_set, fd); - print_all_volume_info(&root_sort, layout); + print_all_volume_info(&root_sort, layout, raw_prefix); __free_all_subvolumn(&root_lookup); return 0; diff --git a/btrfs-list.h b/btrfs-list.h index 5b60068..09d35f7 100644 --- a/btrfs-list.h +++ b/btrfs-list.h @@ -20,6 +20,7 @@ #define BTRFS_LIST_LAYOUT_DEFAULT 0 #define BTRFS_LIST_LAYOUT_TABLE 1 +#define BTRFS_LIST_LAYOUT_RAW 2 /* * one of these for each root we find. @@ -150,7 +151,7 @@ int btrfs_list_setup_comparer(struct btrfs_list_comparer_set **comp_set, int btrfs_list_subvols_print(int fd, struct btrfs_list_filter_set *filter_set, struct btrfs_list_comparer_set *comp_set, - int is_tab_result); + int layout, char *raw_prefix); int btrfs_list_find_updated_files(int fd, u64 root_id, u64 oldest_gen); int btrfs_list_get_default_subvolume(int fd, u64 *default_id); char *btrfs_list_path_for_root(int fd, u64 root); diff --git a/cmds-subvolume.c b/cmds-subvolume.c index bb9629f..9f1d2a4 100644 --- a/cmds-subvolume.c +++ b/cmds-subvolume.c @@ -24,6 +24,7 @@ #include #include #include +#include #include "kerncompat.h" #include "ioctl.h" @@ -418,10 +419,10 @@ static int cmd_subvol_list(int argc, char **argv) if (is_tab_result) ret = btrfs_list_subvols_print(fd, filter_set, comparer_set, - BTRFS_LIST_LAYOUT_TABLE); + BTRFS_LIST_LAYOUT_TABLE, NULL); else ret = btrfs_list_subvols_print(fd, filter_set, comparer_set, - BTRFS_LIST_LAYOUT_DEFAULT); + BTRFS_LIST_LAYOUT_DEFAULT, NULL); if (ret) return 19; return 0; @@ -634,7 +635,7 @@ static int cmd_subvol_get_default(int argc, char **argv) btrfs_list_setup_print_column(BTRFS_LIST_PATH); ret = btrfs_list_subvols_print(fd, filter_set, NULL, - BTRFS_LIST_LAYOUT_DEFAULT); + BTRFS_LIST_LAYOUT_DEFAULT, NULL); if (ret) return 19; return 0; @@ -721,6 +722,153 @@ static int cmd_find_new(int argc, char **argv) return 0; } +static const char * const cmd_subvol_show_usage[] = { + "btrfs subvolume show ", + "Show more information of the subvolume", + NULL +}; + +static int cmd_subvol_show(int argc, char **argv) +{ + struct root_info get_ri; + struct btrfs_list_filter_set *filter_set; + char tstr[256]; + char uuidparse[37]; + char *fullpath = NULL, *svpath = NULL, *mnt = NULL; + char raw_prefix[] = "\t\t\t\t"; + u64 sv_id, mntid; + int fd = -1, mntfd = -1; + int ret = -1; + + if (check_argc_exact(argc, 2)) + usage(cmd_subvol_show_usage); + + fullpath = realpath(argv[1], 0); + if (!fullpath) { + fprintf(stderr, "ERROR: finding real path for '%s', %s\n", + argv[1], strerror(errno)); + goto out; + } + + ret = test_issubvolume(fullpath); + if (ret < 0) { + fprintf(stderr, "ERROR: error accessing '%s'\n", fullpath); + goto out; + } + if (!ret) { + fprintf(stderr, "ERROR: '%s' is not a subvolume\n", fullpath); + ret = -1; + goto out; + } + + ret = find_mount_root(fullpath, &mnt); + if (ret < 0) { + fprintf(stderr, "ERROR: find_mount_root failed on %s: " + "%s\n", fullpath, strerror(-ret)); + goto out; + } + ret = -1; + svpath = get_subvol_name(mnt, fullpath); + + fd = open_file_or_dir(fullpath); + if (fd < 0) { + fprintf(stderr, "ERROR: can't access '%s'\n", fullpath); + goto out; + } + + sv_id = btrfs_list_get_path_rootid(fd); + if (sv_id < 0) { + fprintf(stderr, "ERROR: can't get rootid for '%s'\n", + fullpath); + goto out; + } + + mntfd = open_file_or_dir(mnt); + if (mntfd < 0) { + fprintf(stderr, "ERROR: can't access '%s'\n", mnt); + goto out; + } + + mntid = btrfs_list_get_path_rootid(mntfd); + if (mntid < 0) { + fprintf(stderr, "ERROR: can't get rootid for '%s'\n", mnt); + goto out; + } + + if (sv_id == BTRFS_FS_TREE_OBJECTID) { + printf("%s is btrfs root\n", fullpath); + goto out; + } + + memset(&get_ri, 0, sizeof(get_ri)); + get_ri.root_id = sv_id; + + if (btrfs_get_subvol(mntfd, &get_ri)) { + fprintf(stderr, "ERROR: can't find '%s'\n", + svpath); + goto out; + } + + ret = 0; + /* print the info */ + printf("%s\n", fullpath); + printf("\tName: \t\t\t%s\n", get_ri.name); + + if (uuid_is_null(get_ri.uuid)) + strcpy(uuidparse, "-"); + else + uuid_unparse(get_ri.uuid, uuidparse); + printf("\tuuid: \t\t\t%s\n", uuidparse); + + if (uuid_is_null(get_ri.puuid)) + strcpy(uuidparse, "-"); + else + uuid_unparse(get_ri.puuid, uuidparse); + printf("\tParent uuid: \t\t%s\n", uuidparse); + + if (get_ri.otime) + strftime(tstr, 256, "%Y-%m-%d %X", + localtime(&get_ri.otime)); + else + strcpy(tstr, "-"); + printf("\tCreation time: \t\t%s\n", tstr); + + printf("\tObject ID: \t\t%llu\n", get_ri.root_id); + printf("\tGeneration (Gen): \t%llu\n", get_ri.gen); + printf("\tGen at creation: \t%llu\n", get_ri.ogen); + printf("\tParent: \t\t%llu\n", get_ri.ref_tree); + printf("\tTop Level: \t\t%llu\n", get_ri.top_id); + + /* print the snapshots of the given subvol if any*/ + printf("\tSnapshot(s):\n"); + filter_set = btrfs_list_alloc_filter_set(); + btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_BY_PARENT, + (u64)get_ri.uuid); + btrfs_list_setup_print_column(BTRFS_LIST_PATH); + btrfs_list_subvols_print(fd, filter_set, NULL, BTRFS_LIST_LAYOUT_RAW, + raw_prefix); + + /* clean up */ + if (get_ri.path) + free(get_ri.path); + if (get_ri.name) + free(get_ri.name); + if (get_ri.full_path) + free(get_ri.full_path); + +out: + if (mntfd >= 0) + close(mntfd); + if (fd >= 0) + close(fd); + if (mnt) + free(mnt); + if (fullpath) + free(fullpath); + + return ret; +} + const struct cmd_group subvolume_cmd_group = { subvolume_cmd_group_usage, NULL, { { "create", cmd_subvol_create, cmd_subvol_create_usage, NULL, 0 }, @@ -732,6 +880,7 @@ const struct cmd_group subvolume_cmd_group = { { "set-default", cmd_subvol_set_default, cmd_subvol_set_default_usage, NULL, 0 }, { "find-new", cmd_find_new, cmd_find_new_usage, NULL, 0 }, + { "show", cmd_subvol_show, cmd_subvol_show_usage, NULL, 0 }, { 0, 0, 0, 0, 0 } } }; diff --git a/man/btrfs.8.in b/man/btrfs.8.in index 5f017f8..c8fdc15 100644 --- a/man/btrfs.8.in +++ b/man/btrfs.8.in @@ -17,6 +17,8 @@ btrfs \- control a btrfs filesystem .PP \fBbtrfs\fP \fBsubvolume get-default\fP\fI \fP .PP +\fBbtrfs\fP \fBsubvolume show\fP\fI \fP +.PP \fBbtrfs\fP \fBfilesystem defragment\fP -c[zlib|lzo] [-l \fIlen\fR] \ [-s \fIstart\fR] [-t \fIsize\fR] -[vf] <\fIfile\fR>|<\fIdir\fR> \ [<\fIfile\fR>|<\fIdir\fR>...] @@ -166,6 +168,10 @@ Get the default subvolume of the filesystem \fI\fR. The output format is similar to \fBsubvolume list\fR command. .TP +\fBsubvolume show\fR\fI \fR +Show information of a given subvolume in the \fI\fR. +.TP + \fBfilesystem defragment\fP -c[zlib|lzo] [-l \fIlen\fR] [-s \fIstart\fR] \ [-t \fIsize\fR] -[vf] <\fIfile\fR>|<\fIdir\fR> [<\fIfile\fR>|<\fIdir\fR>...] -- 1.8.1.227.g44fe835