Messages in this thread Patch in this message | | | From | Namjae Jeon <> | Subject | [PATCH v4 4/7] xfsprogs: xfsio: add support FALLOC_FL_COLLAPSE_RANGE for fallocate | Date | Mon, 2 Sep 2013 23:29:38 +0900 |
| |
From: Namjae Jeon <namjae.jeon@samsung.com>
Add support FALLOC_FL_COLLAPSE_RANGE for fallocate.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com> --- io/prealloc.c | 39 ++++++++++++++++++++++++++++++++++++++- man/man8/xfs_io.8 | 6 ++++++ 2 files changed, 44 insertions(+), 1 deletion(-)
diff --git a/io/prealloc.c b/io/prealloc.c index 8380646..e7ff940 100644 --- a/io/prealloc.c +++ b/io/prealloc.c @@ -29,6 +29,10 @@ #define FALLOC_FL_PUNCH_HOLE 0x02 #endif +#ifndef FALLOC_FL_COLLAPSE_RANGE +#define FALLOC_FL_COLLAPSE_RANGE 0x08 +#endif + static cmdinfo_t allocsp_cmd; static cmdinfo_t freesp_cmd; static cmdinfo_t resvsp_cmd; @@ -37,6 +41,7 @@ static cmdinfo_t zero_cmd; #if defined(HAVE_FALLOCATE) static cmdinfo_t falloc_cmd; static cmdinfo_t fpunch_cmd; +static cmdinfo_t fcollapse_cmd; #endif static int @@ -159,8 +164,11 @@ fallocate_f( int mode = 0; int c; - while ((c = getopt(argc, argv, "kp")) != EOF) { + while ((c = getopt(argc, argv, "ckp")) != EOF) { switch (c) { + case 'c': + mode = FALLOC_FL_COLLAPSE_RANGE; + break; case 'k': mode = FALLOC_FL_KEEP_SIZE; break; @@ -203,6 +211,25 @@ fpunch_f( } return 0; } + +static int +fcollapse_f( + int argc, + char **argv) +{ + xfs_flock64_t segment; + int mode = FALLOC_FL_COLLAPSE_RANGE; + + if(!offset_length(argv[1], argv[2], &segment)) + return 0; + + if (fallocate(file->fd, mode, + segment.l_start, segment.l_len)) { + perror("fallocate"); + return 0; + } + return 0; +} #endif /* HAVE_FALLOCATE */ void @@ -277,5 +304,15 @@ prealloc_init(void) fpunch_cmd.oneline = _("de-allocates space assocated with part of a file via fallocate"); add_command(&fpunch_cmd); + + fcollapse_cmd.name = "fcollapse"; + fcollapse_cmd.cfunc = fcollapse_f; + fcollapse_cmd.argmin = 2; + fcollapse_cmd.argmax = 2; + fcollapse_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK; + fcollapse_cmd.args = _("off len"); + fcollapse_cmd.oneline = + _("de-allocates space and nullify the hole by shifting extents into it"); + add_command(&fcollapse_cmd); #endif /* HAVE_FALLOCATE */ } diff --git a/man/man8/xfs_io.8 b/man/man8/xfs_io.8 index 767b50e..9543b20 100644 --- a/man/man8/xfs_io.8 +++ b/man/man8/xfs_io.8 @@ -380,6 +380,12 @@ will set the FALLOC_FL_KEEP_SIZE flag as described in .PD .RE .TP +.BI fcollapse " offset length" +Call fallocate with FALLOC_FL_COLLAPSE_RANGE flag as described in the +.BR fallocate (2) +manual page to de-allocates blocks and eliminates the hole created in this process +by shifting data blocks into the hole. +.TP .BI fpunch " offset length" Punches (de-allocates) blocks in the file by calling fallocate with the FALLOC_FL_PUNCH_HOLE flag as described in the -- 1.7.9.5
| |