This is a prepatory work for the following btrfs fi show command fixes. So that we have a function get_df to get the fs sizes
v4: fixes checkpatch.pl errors as suggested by Wang v3: accepts Zach review comments v2: combined the other patches as below and rebase btrfs-progs: get string for the group profile and type Signed-off-by: Anand Jain <anand.j...@oracle.com> --- cmds-filesystem.c | 181 ++++++++++++++++++++++++++++------------------------ ctree.h | 11 +++ 2 files changed, 108 insertions(+), 84 deletions(-) diff --git a/cmds-filesystem.c b/cmds-filesystem.c index a4e30ea..890d8fd 100644 --- a/cmds-filesystem.c +++ b/cmds-filesystem.c @@ -44,28 +44,51 @@ static const char * const cmd_df_usage[] = { NULL }; -static int cmd_df(int argc, char **argv) +static char *group_type_str(u64 flag) { - struct btrfs_ioctl_space_args *sargs, *sargs_orig; - u64 count = 0, i; - int ret; - int fd; - int e; - char *path; - DIR *dirstream = NULL; - - if (check_argc_exact(argc, 2)) - usage(cmd_df_usage); - - path = argv[1]; + switch (flag & BTRFS_BLOCK_GROUP_TYPE_MASK) { + case BTRFS_BLOCK_GROUP_DATA: + return "data"; + case BTRFS_BLOCK_GROUP_SYSTEM: + return "system"; + case BTRFS_BLOCK_GROUP_METADATA: + return "metadata"; + case BTRFS_BLOCK_GROUP_DATA|BTRFS_BLOCK_GROUP_METADATA: + return "mixed"; + default: + return "unknown"; + } +} - fd = open_file_or_dir(path, &dirstream); - if (fd < 0) { - fprintf(stderr, "ERROR: can't access to '%s'\n", path); - return 12; +static char *group_profile_str(u64 flag) +{ + switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) { + case 0: + return "single"; + case BTRFS_BLOCK_GROUP_RAID0: + return "RAID0"; + case BTRFS_BLOCK_GROUP_RAID1: + return "RAID1"; + case BTRFS_BLOCK_GROUP_RAID5: + return "RAID5"; + case BTRFS_BLOCK_GROUP_RAID6: + return "RAID6"; + case BTRFS_BLOCK_GROUP_DUP: + return "DUP"; + case BTRFS_BLOCK_GROUP_RAID10: + return "RAID10"; + default: + return "unknown"; } +} - sargs_orig = sargs = malloc(sizeof(struct btrfs_ioctl_space_args)); +static int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret) +{ + u64 count = 0; + int ret, e; + struct btrfs_ioctl_space_args *sargs; + + sargs = malloc(sizeof(struct btrfs_ioctl_space_args)); if (!sargs) return -ENOMEM; @@ -75,89 +98,79 @@ static int cmd_df(int argc, char **argv) ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs); e = errno; if (ret) { - fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n", - path, strerror(e)); - goto out; + fprintf(stderr, "ERROR: couldn't get space info - %s\n", + strerror(e)); + free(sargs); + return ret; } if (!sargs->total_spaces) { - ret = 0; - goto out; + free(sargs); + return 0; } - count = sargs->total_spaces; + free(sargs); - sargs = realloc(sargs, sizeof(struct btrfs_ioctl_space_args) + + sargs = malloc(sizeof(struct btrfs_ioctl_space_args) + (count * sizeof(struct btrfs_ioctl_space_info))); - if (!sargs) { - sargs = sargs_orig; + if (!sargs) ret = -ENOMEM; - goto out; - } sargs->space_slots = count; sargs->total_spaces = 0; - ret = ioctl(fd, BTRFS_IOC_SPACE_INFO, sargs); e = errno; if (ret) { - fprintf(stderr, "ERROR: couldn't get space info on '%s' - %s\n", - path, strerror(e)); - goto out; + fprintf(stderr, "ERROR: get space info count %llu - %s\n", + count, strerror(e)); + free(sargs); + return ret; } + *sargs_ret = sargs; + return 0; +} - for (i = 0; i < sargs->total_spaces; i++) { - char description[80]; - int written = 0; - u64 flags = sargs->spaces[i].flags; - - memset(description, 0, 80); - - if (flags & BTRFS_BLOCK_GROUP_DATA) { - if (flags & BTRFS_BLOCK_GROUP_METADATA) { - snprintf(description, 14, "%s", - "Data+Metadata"); - written += 13; - } else { - snprintf(description, 5, "%s", "Data"); - written += 4; - } - } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM) { - snprintf(description, 7, "%s", "System"); - written += 6; - } else if (flags & BTRFS_BLOCK_GROUP_METADATA) { - snprintf(description, 9, "%s", "Metadata"); - written += 8; - } +static void print_df(struct btrfs_ioctl_space_args *sargs) +{ + u64 i; + struct btrfs_ioctl_space_info *sp = sargs->spaces; + + for (i = 0; i < sargs->total_spaces; i++, sp++) { + printf("%s, %s: total=%s, used=%s\n", + group_type_str(sp->flags), + group_profile_str(sp->flags), + pretty_size(sp->total_bytes), + pretty_size(sp->used_bytes)); + } +} - if (flags & BTRFS_BLOCK_GROUP_RAID0) { - snprintf(description+written, 8, "%s", ", RAID0"); - written += 7; - } else if (flags & BTRFS_BLOCK_GROUP_RAID1) { - snprintf(description+written, 8, "%s", ", RAID1"); - written += 7; - } else if (flags & BTRFS_BLOCK_GROUP_DUP) { - snprintf(description+written, 6, "%s", ", DUP"); - written += 5; - } else if (flags & BTRFS_BLOCK_GROUP_RAID10) { - snprintf(description+written, 9, "%s", ", RAID10"); - written += 8; - } else if (flags & BTRFS_BLOCK_GROUP_RAID5) { - snprintf(description+written, 9, "%s", ", RAID5"); - written += 7; - } else if (flags & BTRFS_BLOCK_GROUP_RAID6) { - snprintf(description+written, 9, "%s", ", RAID6"); - written += 7; - } +static int cmd_df(int argc, char **argv) +{ + struct btrfs_ioctl_space_args *sargs = NULL; + int ret; + int fd; + char *path; + DIR *dirstream = NULL; - printf("%s: total=%s, used=%s\n", description, - pretty_size(sargs->spaces[i].total_bytes), - pretty_size(sargs->spaces[i].used_bytes)); + if (check_argc_exact(argc, 2)) + usage(cmd_df_usage); + + path = argv[1]; + + fd = open_file_or_dir(path, &dirstream); + if (fd < 0) { + fprintf(stderr, "ERROR: can't access to '%s'\n", path); + return 12; } -out: - close_file_or_dir(fd, dirstream); - free(sargs); + ret = get_df(fd, &sargs); - return 0; + if (!ret && sargs) { + print_df(sargs); + free(sargs); + } else + fprintf(stderr, "ERROR: get_df failed %s\n", strerror(ret)); + + close_file_or_dir(fd, dirstream); + return ret; } static int uuid_search(struct btrfs_fs_devices *fs_devices, char *search) diff --git a/ctree.h b/ctree.h index 3c65d0a..3322c68 100644 --- a/ctree.h +++ b/ctree.h @@ -828,6 +828,17 @@ struct btrfs_csum_item { #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8) #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE +#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \ + BTRFS_BLOCK_GROUP_SYSTEM | \ + BTRFS_BLOCK_GROUP_METADATA) + +#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \ + BTRFS_BLOCK_GROUP_RAID1 | \ + BTRFS_BLOCK_GROUP_RAID5 | \ + BTRFS_BLOCK_GROUP_RAID6 | \ + BTRFS_BLOCK_GROUP_DUP | \ + BTRFS_BLOCK_GROUP_RAID10) + /* used in struct btrfs_balance_args fields */ #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48) -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html