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btrfsprogs
0008-Update-for-lzo-support.patch
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File 0008-Update-for-lzo-support.patch of Package btrfsprogs
From 97e64f8cb21685b7359169f3047c0d082b0ff7e8 Mon Sep 17 00:00:00 2001 From: Li Zefan <lizf@cn.fujitsu.com> Date: Thu, 18 Nov 2010 03:49:56 +0000 Subject: [PATCH 08/15] Update for lzo support [Btrfs-Progs][V2] Update for lzo support - Add incompat flag, otherwise btrfs-progs will report error when operating on btrfs filesystems mounted with lzo option. - Update man page. - Allow to turn on lzo compression for defrag operation: # btrfs filesystem defragment -c[zlib, lzo] <file> Note: "-c zlib" will fail, because that's how getopt() works for optional arguments. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com> --- btrfs.c | 2 +- btrfs_cmds.c | 24 ++++++++++++++++++++---- ctree.h | 10 +++++++--- ioctl.h | 9 ++++++++- man/btrfs.8.in | 10 ++++++---- 5 files changed, 42 insertions(+), 13 deletions(-) diff --git a/btrfs.c b/btrfs.c index 46314cf..1b4f403 100644 --- a/btrfs.c +++ b/btrfs.c @@ -65,7 +65,7 @@ static struct Command commands[] = { "List the recently modified files in a filesystem." }, { do_defrag, -1, - "filesystem defragment", "[-vcf] [-s start] [-l len] [-t size] <file>|<dir> [<file>|<dir>...]\n" + "filesystem defragment", "[-vf] [-c[zlib,lzo]] [-s start] [-l len] [-t size] <file>|<dir> [<file>|<dir>...]\n" "Defragment a file or a directory." }, { do_set_default_subvol, 2, diff --git a/btrfs_cmds.c b/btrfs_cmds.c index c21a007..26d4fcc 100644 --- a/btrfs_cmds.c +++ b/btrfs_cmds.c @@ -142,10 +142,21 @@ static u64 parse_size(char *s) return atoll(s) * mult; } +static int parse_compress_type(char *s) +{ + if (strcmp(optarg, "zlib") == 0) + return BTRFS_COMPRESS_ZLIB; + else if (strcmp(optarg, "lzo") == 0) + return BTRFS_COMPRESS_LZO; + else { + fprintf(stderr, "Unknown compress type %s\n", s); + exit(1); + }; +} + int do_defrag(int ac, char **av) { int fd; - int compress = 0; int flush = 0; u64 start = 0; u64 len = (u64)-1; @@ -157,15 +168,18 @@ int do_defrag(int ac, char **av) int fancy_ioctl = 0; struct btrfs_ioctl_defrag_range_args range; int e=0; + int compress_type = BTRFS_COMPRESS_NONE; optind = 1; while(1) { - int c = getopt(ac, av, "vcfs:l:t:"); + int c = getopt(ac, av, "vc::fs:l:t:"); if (c < 0) break; switch(c) { case 'c': - compress = 1; + compress_type = BTRFS_COMPRESS_ZLIB; + if (optarg) + compress_type = parse_compress_type(optarg); fancy_ioctl = 1; break; case 'f': @@ -203,8 +217,10 @@ int do_defrag(int ac, char **av) range.start = start; range.len = len; range.extent_thresh = thresh; - if (compress) + if (compress_type) { range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS; + range.compress_type = compress_type; + } if (flush) range.flags |= BTRFS_DEFRAG_RANGE_START_IO; diff --git a/ctree.h b/ctree.h index ed83d02..61eb639 100644 --- a/ctree.h +++ b/ctree.h @@ -354,12 +354,14 @@ struct btrfs_super_block { #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) +#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3) #define BTRFS_FEATURE_COMPAT_SUPP 0ULL #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL #define BTRFS_FEATURE_INCOMPAT_SUPP \ (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ + BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) /* @@ -505,9 +507,11 @@ struct btrfs_timespec { } __attribute__ ((__packed__)); typedef enum { - BTRFS_COMPRESS_NONE = 0, - BTRFS_COMPRESS_ZLIB = 1, - BTRFS_COMPRESS_LAST = 2, + BTRFS_COMPRESS_NONE = 0, + BTRFS_COMPRESS_ZLIB = 1, + BTRFS_COMPRESS_LZO = 2, + BTRFS_COMPRESS_TYPES = 2, + BTRFS_COMPRESS_LAST = 3, } btrfs_compression_type; /* we don't understand any encryption methods right now */ diff --git a/ioctl.h b/ioctl.h index 776d7a9..bb7b9e0 100644 --- a/ioctl.h +++ b/ioctl.h @@ -116,8 +116,15 @@ struct btrfs_ioctl_defrag_range_args { */ __u32 extent_thresh; + /* + * which compression method to use if turning on compression + * for this defrag operation. If unspecified, zlib will + * be used + */ + __u32 compress_type; + /* spare for later */ - __u32 unused[5]; + __u32 unused[4]; }; struct btrfs_ioctl_space_info { diff --git a/man/btrfs.8.in b/man/btrfs.8.in index cba2de1..1ffed13 100644 --- a/man/btrfs.8.in +++ b/man/btrfs.8.in @@ -15,12 +15,12 @@ btrfs \- control a btrfs filesystem .PP \fBbtrfs\fP \fBsubvolume set-default\fP\fI <id> <path>\fP .PP -\fBbtrfs\fP \fBfilesystem defragment\fP\fI [-vcf] [-s start] [-l len] [-t size] <file>|<dir> [<file>|<dir>...]\fP -.PP \fBbtrfs\fP \fBfilesystem sync\fP\fI <path> \fP .PP \fBbtrfs\fP \fBfilesystem resize\fP\fI [+/\-]<size>[gkm]|max <filesystem>\fP .PP +\fBbtrfs\fP \fBfilesystem defrag\fP\fI [options] <file>|<dir> [<file>|<dir>...]\fP +.PP \fBbtrfs\fP \fBdevice scan\fP\fI [<device> [<device>..]]\fP .PP \fBbtrfs\fP \fBdevice show\fP\fI <dev>|<label> [<dev>|<label>...]\fP @@ -30,7 +30,6 @@ btrfs \- control a btrfs filesystem \fBbtrfs\fP \fBdevice add\fP\fI <dev> [<dev>..] <path> \fP .PP \fBbtrfs\fP \fBdevice delete\fP\fI <dev> [<dev>..] <path> \fP] - .PP \fBbtrfs\fP \fBhelp|\-\-help|\-h \fP\fI\fP .PP @@ -104,10 +103,13 @@ Set the subvolume of the filesystem \fI<path>\fR which is mounted as is returned by the \fBsubvolume list\fR command. .TP -\fBfilesystem defragment\fP\fI [-vcf] [-s start] [-l len] [-t size] <file>|<dir> [<file>|<dir>...]\fR +\fBfilesystem defragment\fP -c[zlib|lzo] [-l \fIlen\fR] [-s \fIstart\fR] [-t \fIsize\fR] -[vf] <\fIfile\fR>|<\fIdir\fR> [<\fIfile\fR>|<\fIdir\fR>...] + Defragment file data and/or directory metadata. To defragment all files in a directory you have to specify each one on its own or use your shell wildcards. +The start position and the number of bytes to deframention can be specified by \fIstart\fR and \fIlen\fR. Any extent bigger than \fIthresh\fR will be considered already defragged. Use 0 to take the kernel default, and use 1 to say eveery single extent must be rewritten. You can also turn on compression in defragment operations. + \fB-v\fP be verbose \fB-c\fP compress file contents while defragmenting -- 1.7.5.2.353.g5df3e
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