From: Namjae Jeon Subject: [PATCH v4 4/10] xfsprog: xfsio: Add support FALLOC_FL_COLLAPSE_RANGE for fallocate Date: Sun, 8 Dec 2013 23:11:30 +0900 Message-ID: <1386511890-3794-1-git-send-email-linkinjeon@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Namjae Jeon , Namjae Jeon , linux-kernel@vger.kernel.org, xfs@oss.sgi.com, Ashish Sangwan , linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org To: viro@zeniv.linux.org.uk, david@fromorbit.com, bpm@sgi.com, tytso@mit.edu, adilger.kernel@dilger.ca, jack@suse.cz Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com List-Id: linux-ext4.vger.kernel.org From: Namjae Jeon Add support FALLOC_FL_COLLAPSE_RANGE for fallocate. Signed-off-by: Namjae Jeon Signed-off-by: Ashish Sangwan Reviewed-by: Dave Chinner --- io/prealloc.c | 41 +++++++++++++++++++++++++++++++++++++++-- man/man8/xfs_io.8 | 6 ++++++ 2 files changed, 45 insertions(+), 2 deletions(-) diff --git a/io/prealloc.c b/io/prealloc.c index 8380646..d697f82 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 @@ -263,7 +290,7 @@ prealloc_init(void) falloc_cmd.argmin = 2; falloc_cmd.argmax = -1; falloc_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK; - falloc_cmd.args = _("[-k] [-p] off len"); + falloc_cmd.args = _("[-c] [-k] [-p] off len"); falloc_cmd.oneline = _("allocates space associated with part of a file via fallocate"); add_command(&falloc_cmd); @@ -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 eliminates the hole by shifting extents"); + 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 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs