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openSUSE:12.2:PowerPC
btrfsprogs
0114-btrfs-progs-Add-ioctl-to-read-compressed-s...
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File 0114-btrfs-progs-Add-ioctl-to-read-compressed-size-of-a-f.patch of Package btrfsprogs
From 72218a2090e1cbafe9baa97aaa465a28438c3dbb Mon Sep 17 00:00:00 2001 From: David Sterba <dsterba@suse.cz> Date: Mon, 19 Dec 2011 17:51:11 +0100 Subject: [PATCH 16/43] btrfs-progs: Add ioctl to read compressed size of a file Signed-off-by: David Sterba <dsterba@suse.cz> --- btrfs.c | 9 ++++++- btrfs_cmds.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++ btrfs_cmds.h | 1 + ioctl.h | 13 ++++++++++ man/btrfs.8.in.old | 10 +++++++ 5 files changed, 100 insertions(+), 1 deletions(-) diff --git a/btrfs.c b/btrfs.c index e78f194..f5b8fd4 100644 --- a/btrfs.c +++ b/btrfs.c @@ -325,7 +325,14 @@ static struct Command commands[] = { "filesystem label", "<device> [<newlabel>]\n" "With one argument, get the label of filesystem on <device>.\n" "If <newlabel> is passed, set the filesystem label to <newlabel>.\n" - "The filesystem must be unmounted.\n" + "The filesystem must be unmounted." + }, + { do_compr_size, -1, + "filesystem csize", "[-s start] [-e end] <file>\n" + "Read ordinary and compressed size of extents in the range [start,end)\n" + "-s start range start inclusive, accepts K/M/G modifiers\n" + "-e end range end exclusive, accepts K/M/G modifiers\n", + NULL }, { do_scrub_start, -1, "scrub start", "[-Bdqr] <path>|<device>\n" diff --git a/btrfs_cmds.c b/btrfs_cmds.c index 12346e5..c8196d1 100644 --- a/btrfs_cmds.c +++ b/btrfs_cmds.c @@ -2058,3 +2058,71 @@ out: free(inodes); return ret; } + +int do_compr_size(int argc, char **argv) +{ + int ret; + int fd; + struct btrfs_ioctl_compr_size_args args; + + args.start = 0; + args.end = (u64)-1; + optind = 1; + while (1) { + int c = getopt(argc, argv, "s:e:r"); + if (c < 0) + break; + switch (c) { + case 's': + args.start = parse_size(optarg); + break; + case 'e': + args.end = parse_size(optarg); + break; + default: + fprintf(stderr, "ERROR: Invalid arguments for csize\n"); + return 1; + } + } + + if (args.start > args.end) { + fprintf(stderr, "ERROR: Invalid range for csize\n"); + return 1; + } + + if (argc - optind == 0) { + fprintf(stderr, "ERROR: Invalid arguments for csize\n"); + return 1; + } + argc -= optind; + + fd = open_file_or_dir(argv[optind]); + if (fd < 0) { + fprintf(stderr, "ERROR: can't access '%s'\n", argv[optind]); + return 1; + } + + ret = ioctl(fd, BTRFS_IOC_COMPR_SIZE, &args); + if (ret < 0) { + fprintf(stderr, "ERROR: ioctl returned %d, errno %d %s\n", + ret, errno, strerror(errno)); + return errno; + } + + printf("File name: %s\n", argv[optind]); + if (args.end == (u64)-1) + printf("File range: %llu-EOF\n", + (unsigned long long)args.start); + else + printf("File range: %llu-%llu\n", + (unsigned long long)args.start, + (unsigned long long)args.end); + + printf("Compressed size: %llu\n", + (unsigned long long)(args.compressed_size << 9)); + printf("Uncompressed size: %llu\n", + (unsigned long long)(args.size << 9)); + printf("Ratio: %3.2f%%\n", + 100.0 * args.compressed_size / args.size); + return 0; +} diff --git a/btrfs_cmds.h b/btrfs_cmds.h index 53d51d6..07dad7a 100644 --- a/btrfs_cmds.h +++ b/btrfs_cmds.h @@ -46,3 +46,4 @@ int open_file_or_dir(const char *fname); int do_ino_to_path(int nargs, char **argv); int do_logical_to_ino(int nargs, char **argv); char *path_for_root(int fd, u64 root); +int do_compr_size(int argc, char **argv); diff --git a/ioctl.h b/ioctl.h index 78aebce..a820098 100644 --- a/ioctl.h +++ b/ioctl.h @@ -272,6 +272,17 @@ struct btrfs_ioctl_logical_ino_args { __u64 inodes; }; +struct btrfs_ioctl_compr_size_args { + /* Range start, inclusive */ + __u64 start; /* in */ + /* Range end, exclusive */ + __u64 end; /* in */ + __u64 size; /* out */ + __u64 compressed_size; /* out */ + __u64 reserved[2]; +}; + + /* BTRFS_IOC_SNAP_CREATE is no longer used by the btrfs command */ #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \ struct btrfs_ioctl_vol_args) @@ -330,5 +341,7 @@ struct btrfs_ioctl_logical_ino_args { struct btrfs_ioctl_ino_path_args) #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \ struct btrfs_ioctl_ino_path_args) +#define BTRFS_IOC_COMPR_SIZE _IOR(BTRFS_IOCTL_MAGIC, 51, \ + struct btrfs_ioctl_compr_size_args) #endif diff --git a/man/btrfs.8.in.old b/man/btrfs.8.in.old index be478e0..b7dacea 100644 --- a/man/btrfs.8.in.old +++ b/man/btrfs.8.in.old @@ -31,6 +31,8 @@ btrfs \- control a btrfs filesystem .PP \fBbtrfs\fP \fBfilesystem defragment\fP\fI <file>|<dir> [<file>|<dir>...]\fP .PP +\fBbtrfs\fP \fBfilesystem csize \fP\fI [-s start] [-e end] <file> \fP +.PP \fBbtrfs\fP \fBdevice scan\fP\fI [--all-devices|<device> [<device>...]]\fP .PP \fBbtrfs\fP \fBdevice show\fP\fI [--all-devices|<uuid>|<label>]\fP @@ -209,6 +211,14 @@ If \fB--all-devices\fP is passed, all the devices under /dev are scanned; otherwise the devices list is extracted from the /proc/partitions file. .TP +\fBfilesystem csize \fR \fI [-s start] [-e end] <file> \fR +Read ordinary and compressed size of extents in the range [start,end) of \fI<file>\fR +.IP +\fB-s start\fP range start inclusive, accepts K/M/G modifiers +.IP +\fB-e end\fP range end exclusive, accepts K/M/G modifiers +.TP + \fBdevice balance\fR \fI<path>\fR Balance the chunks of the filesystem identified by \fI<path>\fR across the devices. -- 1.7.6.233.gd79bc
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