* [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support
@ 2013-08-22 21:31 Mark Tinguely
2013-08-22 22:45 ` Eric Sandeen
0 siblings, 1 reply; 9+ messages in thread
From: Mark Tinguely @ 2013-08-22 21:31 UTC (permalink / raw)
To: xfs
[-- Attachment #1: v7-xfs_io-add-the-lseek-SEEK_DATA-SEEK_HOLE-support.patch --]
[-- Type: text/plain, Size: 8820 bytes --]
Add the lseek SEEK_DATA/SEEK_HOLE support into xfs_io.
The result from the lseek() call will be printed to the output.
For example:
xfs_io> seek -h 609k
HOLE 630784
Signed-off-by: Mark Tinguely <tinguely@sgi.com>
---
version 7 or 8 - Eric what number is this?
I think I added all the old Dave and new Eric changes.
Unconditionally compile the feature into xfs_io.
(Too) many comments added. This routine basically is a seek and print loop.
Removed the ending EOF, except where that was the only entry.
No output looked bad.
This print the only entry exception changed the loop/if statements.
Changed error message to perror.
Ran the fine-tune kernel test on the following XFS kernel version:
Linux 3.0 no support.
Linux 3.1 vfs default support.
Linux 3.5 XFS first support.
Linux 3.7 XFS fine-tuned support.
Each version has different output - as expected. Eric you want the output?
io/Makefile | 3
io/init.c | 1
io/io.h | 1
io/seek.c | 197 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
man/man8/xfs_io.8 | 35 +++++++++
5 files changed, 236 insertions(+), 1 deletion(-)
Index: b/io/Makefile
===================================================================
--- a/io/Makefile
+++ b/io/Makefile
@@ -10,7 +10,8 @@ LSRCFILES = xfs_bmap.sh xfs_freeze.sh xf
HFILES = init.h io.h
CFILES = init.c \
attr.c bmap.c file.c freeze.c fsync.c getrusage.c imap.c mmap.c \
- open.c parent.c pread.c prealloc.c pwrite.c shutdown.c truncate.c
+ open.c parent.c pread.c prealloc.c pwrite.c seek.c shutdown.c \
+ truncate.c
LLDLIBS = $(LIBXCMD) $(LIBHANDLE)
LTDEPENDENCIES = $(LIBXCMD) $(LIBHANDLE)
Index: b/io/init.c
===================================================================
--- a/io/init.c
+++ b/io/init.c
@@ -64,6 +64,7 @@ init_commands(void)
help_init();
imap_init();
inject_init();
+ seek_init();
madvise_init();
mincore_init();
mmap_init();
Index: b/io/io.h
===================================================================
--- a/io/io.h
+++ b/io/io.h
@@ -105,6 +105,7 @@ extern void pread_init(void);
extern void prealloc_init(void);
extern void pwrite_init(void);
extern void quit_init(void);
+extern void seek_init(void);
extern void shutdown_init(void);
extern void truncate_init(void);
Index: b/io/seek.c
===================================================================
--- /dev/null
+++ b/io/seek.c
@@ -0,0 +1,197 @@
+/*
+ * Copyright (c) 2013 SGI
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <xfs/xfs.h>
+#include <xfs/command.h>
+#include <xfs/input.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "init.h"
+#include "io.h"
+
+static cmdinfo_t seek_cmd;
+
+static void
+seek_help(void)
+{
+ printf(_(
+"\n"
+" returns the next hole and/or data offset at or after the requested offset\n"
+"\n"
+" Example:\n"
+" 'seek -d 512' - offset of data at or following offset 512\n"
+" 'seek -a -r 0' - offsets of all data and hole in entire file\n"
+"\n"
+" Returns the offset of the next data and/or hole. There is an implied hole\n"
+" at the end of file. If the specified offset is past end of file, or there\n"
+" is no data past the specified offset, EOF is returned.\n"
+" -a -- return the next data and hole starting at the specified offset.\n"
+" -d -- return the next data starting at the specified offset.\n"
+" -h -- return the next hole starting at the specified offset.\n"
+" -r -- return all remaining type(s) starting at the specified offset.\n"
+"\n"));
+}
+
+#ifndef HAVE_SEEK_DATA
+#define SEEK_DATA 3 /* seek to the next data */
+#define SEEK_HOLE 4 /* seek to the next hole */
+#endif
+
+/* values for flag variable */
+#define SEEK_DFLAG (1 << 0)
+#define SEEK_HFLAG (1 << 1)
+#define SEEK_RFLAG (1 << 2)
+
+/* indexes into the seekinfo array */
+#define DATA 0
+#define HOLE 1
+
+struct seekinfo {
+ char *name; /* display item name */
+ int seektype; /* data or hole */
+ int mask; /* compared for print and looping */
+} seekinfo[] = {
+ {"DATA", SEEK_DATA, SEEK_DFLAG},
+ {"HOLE", SEEK_HOLE, SEEK_HFLAG}
+};
+
+/* print item type and offset. catch special cases of eof and error */
+void
+seek_output(
+ char *type,
+ off64_t offset)
+{
+ if (offset == -1) {
+ if (errno == ENXIO)
+ printf("%s EOF\n", type);
+ else
+ perror("ERR");
+ } else
+ printf("%s %lld\n", type, (long long)offset);
+}
+
+static int
+seek_f(
+ int argc,
+ char **argv)
+{
+ off64_t offset, result;
+ size_t fsblocksize, fssectsize;
+ int flag;
+ int current; /* specify data or hole */
+ int c;
+
+ flag = 0;
+ init_cvtnum(&fsblocksize, &fssectsize);
+
+ while ((c = getopt(argc, argv, "adhr")) != EOF) {
+ switch (c) {
+ case 'a':
+ flag |= (SEEK_HFLAG | SEEK_DFLAG);
+ break;
+ case 'd':
+ flag |= SEEK_DFLAG;
+ break;
+ case 'h':
+ flag |= SEEK_HFLAG;
+ break;
+ case 'r':
+ flag |= SEEK_RFLAG;
+ break;
+ default:
+ return command_usage(&seek_cmd);
+ }
+ }
+ if (!(flag & (SEEK_DFLAG | SEEK_HFLAG)) || optind != argc - 1)
+ return command_usage(&seek_cmd);
+
+ offset = cvtnum(fsblocksize, fssectsize, argv[optind]);
+ if (offset < 0)
+ return command_usage(&seek_cmd);
+
+ /*
+ * check to see if the offset is a data or hole entry and
+ * decide if we want to display that type of entry.
+ */
+ if (flag & SEEK_HFLAG) {
+ result = lseek64(file->fd, offset, SEEK_HOLE);
+ if ((result == offset) || !(flag & SEEK_DFLAG)) {
+ /*
+ * this offset is a hole or are only displaying holes.
+ * if this offset is for data and we are displaying
+ * data, then we will fall through below to
+ * initialize the data search.
+ */
+ offset = result;
+ current = HOLE;
+ goto found_hole;
+ }
+ }
+
+ /* The offset is not a hole, or we are looking just for data */
+ current = DATA;
+ offset = lseek64(file->fd, offset, SEEK_DATA);
+
+found_hole:
+ /*
+ * At this point we know which type and the offset of the starting
+ * item. "current" alternates between data / hole entries in
+ * assending order - this alternation is needed even if only one
+ * type is to be displayed.
+ *
+ * An error or EOF will terminate the display, otherwise "flag"
+ * determines if there are more items to be displayed.
+ */
+ for (c = 0; flag; c++) {
+ if (offset == -1) {
+ /* print error or eof if the only entry */
+ if (errno != ENXIO || c == 0 )
+ seek_output(seekinfo[current].name, offset);
+ return 0; /* stop on error or EOF */
+ }
+
+ seek_output(seekinfo[current].name, offset);
+
+ /*
+ * When displaying only a single data and/or hole item, mask
+ * off the item as it is displayed. The loop will end when all
+ * requested items have been displayed.
+ */
+ if (!(flag & SEEK_RFLAG))
+ flag &= ~seekinfo[current].mask;
+
+ current ^= 1; /* alternate between data and hole */
+ offset = lseek64(file->fd, offset, seekinfo[current].seektype);
+ }
+ return 0;
+}
+
+void
+seek_init(void)
+{
+ seek_cmd.name = "seek";
+ seek_cmd.cfunc = seek_f;
+ seek_cmd.argmin = 2;
+ seek_cmd.argmax = 5;
+ seek_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK;
+ seek_cmd.args = _("-a | -d | -h [-r] off");
+ seek_cmd.oneline = _("locate the next data and/or hole");
+ seek_cmd.help = seek_help;
+
+ add_command(&seek_cmd);
+}
Index: b/man/man8/xfs_io.8
===================================================================
--- a/man/man8/xfs_io.8
+++ b/man/man8/xfs_io.8
@@ -418,6 +418,41 @@ to read (in bytes)
.RE
.PD
.TP
+.TP
+.BI "seek \-a | \-d | \-h [ \-r ] offset"
+On platforms that support the
+.BR lseek (2)
+.B SEEK_DATA
+and
+.B SEEK_HOLE
+options, display the offsets of the specified segments.
+.RS 1.0i
+.PD 0
+.TP 0.4i
+.B \-a
+Display both
+.B data
+and
+.B hole
+segments starting at the specified
+.B offset.
+.TP
+.B \-d
+Display the
+.B data
+segment starting at the specified
+.B offset.
+.TP
+.B \-h
+Display the
+.B hole
+segment starting at the specified
+.B offset.
+.TP
+.B \-r
+Recursively display all the specified segments starting at the specified
+.B offset.
+.TP
.SH MEMORY MAPPED I/O COMMANDS
.TP
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support
2013-08-22 21:31 [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support Mark Tinguely
@ 2013-08-22 22:45 ` Eric Sandeen
2013-08-23 13:26 ` Mark Tinguely
0 siblings, 1 reply; 9+ messages in thread
From: Eric Sandeen @ 2013-08-22 22:45 UTC (permalink / raw)
To: Mark Tinguely; +Cc: xfs
On 8/22/13 4:31 PM, Mark Tinguely wrote:
> Add the lseek SEEK_DATA/SEEK_HOLE support into xfs_io.
> The result from the lseek() call will be printed to the output.
> For example:
>
> xfs_io> seek -h 609k
> HOLE 630784
>
> Signed-off-by: Mark Tinguely <tinguely@sgi.com>
> ---
> version 7 or 8 - Eric what number is this?
Go for 13, for luck!
I think this looks ok, I won't torture you any longer. If there's anything
to fix up when it really gets used in earnest we can do it then.
(it crossed my mind that for the "-r" and "-a" invocations it might be good to print
out the offset which was sent for each SEEK_* "whence," but *shrug*)
Thanks for all the iterations,
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
> I think I added all the old Dave and new Eric changes.
>
> Unconditionally compile the feature into xfs_io.
>
> (Too) many comments added. This routine basically is a seek and print loop.
>
> Removed the ending EOF, except where that was the only entry.
> No output looked bad.
> This print the only entry exception changed the loop/if statements.
>
> Changed error message to perror.
>
> Ran the fine-tune kernel test on the following XFS kernel version:
> Linux 3.0 no support.
> Linux 3.1 vfs default support.
> Linux 3.5 XFS first support.
> Linux 3.7 XFS fine-tuned support.
>
> Each version has different output - as expected. Eric you want the output?
Meh. We can fix it up as needed. I'm a bit shocked that we (the grand Linux
"we") didn't just settle on "whatever Solaris did is correct."
> io/Makefile | 3
> io/init.c | 1
> io/io.h | 1
> io/seek.c | 197 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
> man/man8/xfs_io.8 | 35 +++++++++
> 5 files changed, 236 insertions(+), 1 deletion(-)
>
> Index: b/io/Makefile
> ===================================================================
> --- a/io/Makefile
> +++ b/io/Makefile
> @@ -10,7 +10,8 @@ LSRCFILES = xfs_bmap.sh xfs_freeze.sh xf
> HFILES = init.h io.h
> CFILES = init.c \
> attr.c bmap.c file.c freeze.c fsync.c getrusage.c imap.c mmap.c \
> - open.c parent.c pread.c prealloc.c pwrite.c shutdown.c truncate.c
> + open.c parent.c pread.c prealloc.c pwrite.c seek.c shutdown.c \
> + truncate.c
>
> LLDLIBS = $(LIBXCMD) $(LIBHANDLE)
> LTDEPENDENCIES = $(LIBXCMD) $(LIBHANDLE)
> Index: b/io/init.c
> ===================================================================
> --- a/io/init.c
> +++ b/io/init.c
> @@ -64,6 +64,7 @@ init_commands(void)
> help_init();
> imap_init();
> inject_init();
> + seek_init();
> madvise_init();
> mincore_init();
> mmap_init();
> Index: b/io/io.h
> ===================================================================
> --- a/io/io.h
> +++ b/io/io.h
> @@ -105,6 +105,7 @@ extern void pread_init(void);
> extern void prealloc_init(void);
> extern void pwrite_init(void);
> extern void quit_init(void);
> +extern void seek_init(void);
> extern void shutdown_init(void);
> extern void truncate_init(void);
>
> Index: b/io/seek.c
> ===================================================================
> --- /dev/null
> +++ b/io/seek.c
> @@ -0,0 +1,197 @@
> +/*
> + * Copyright (c) 2013 SGI
> + * All Rights Reserved.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it would be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write the Free Software Foundation,
> + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
> + */
> +
> +#include <xfs/xfs.h>
> +#include <xfs/command.h>
> +#include <xfs/input.h>
> +#include <sys/types.h>
> +#include <unistd.h>
> +#include "init.h"
> +#include "io.h"
> +
> +static cmdinfo_t seek_cmd;
> +
> +static void
> +seek_help(void)
> +{
> + printf(_(
> +"\n"
> +" returns the next hole and/or data offset at or after the requested offset\n"
> +"\n"
> +" Example:\n"
> +" 'seek -d 512' - offset of data at or following offset 512\n"
> +" 'seek -a -r 0' - offsets of all data and hole in entire file\n"
> +"\n"
> +" Returns the offset of the next data and/or hole. There is an implied hole\n"
> +" at the end of file. If the specified offset is past end of file, or there\n"
> +" is no data past the specified offset, EOF is returned.\n"
> +" -a -- return the next data and hole starting at the specified offset.\n"
> +" -d -- return the next data starting at the specified offset.\n"
> +" -h -- return the next hole starting at the specified offset.\n"
> +" -r -- return all remaining type(s) starting at the specified offset.\n"
> +"\n"));
> +}
> +
> +#ifndef HAVE_SEEK_DATA
> +#define SEEK_DATA 3 /* seek to the next data */
> +#define SEEK_HOLE 4 /* seek to the next hole */
> +#endif
> +
> +/* values for flag variable */
> +#define SEEK_DFLAG (1 << 0)
> +#define SEEK_HFLAG (1 << 1)
> +#define SEEK_RFLAG (1 << 2)
> +
> +/* indexes into the seekinfo array */
> +#define DATA 0
> +#define HOLE 1
> +
> +struct seekinfo {
> + char *name; /* display item name */
> + int seektype; /* data or hole */
> + int mask; /* compared for print and looping */
> +} seekinfo[] = {
> + {"DATA", SEEK_DATA, SEEK_DFLAG},
> + {"HOLE", SEEK_HOLE, SEEK_HFLAG}
> +};
> +
> +/* print item type and offset. catch special cases of eof and error */
> +void
> +seek_output(
> + char *type,
> + off64_t offset)
> +{
> + if (offset == -1) {
> + if (errno == ENXIO)
> + printf("%s EOF\n", type);
> + else
> + perror("ERR");
> + } else
> + printf("%s %lld\n", type, (long long)offset);
> +}
> +
> +static int
> +seek_f(
> + int argc,
> + char **argv)
> +{
> + off64_t offset, result;
> + size_t fsblocksize, fssectsize;
> + int flag;
> + int current; /* specify data or hole */
> + int c;
> +
> + flag = 0;
> + init_cvtnum(&fsblocksize, &fssectsize);
> +
> + while ((c = getopt(argc, argv, "adhr")) != EOF) {
> + switch (c) {
> + case 'a':
> + flag |= (SEEK_HFLAG | SEEK_DFLAG);
> + break;
> + case 'd':
> + flag |= SEEK_DFLAG;
> + break;
> + case 'h':
> + flag |= SEEK_HFLAG;
> + break;
> + case 'r':
> + flag |= SEEK_RFLAG;
> + break;
> + default:
> + return command_usage(&seek_cmd);
> + }
> + }
> + if (!(flag & (SEEK_DFLAG | SEEK_HFLAG)) || optind != argc - 1)
> + return command_usage(&seek_cmd);
> +
> + offset = cvtnum(fsblocksize, fssectsize, argv[optind]);
> + if (offset < 0)
> + return command_usage(&seek_cmd);
> +
> + /*
> + * check to see if the offset is a data or hole entry and
> + * decide if we want to display that type of entry.
> + */
> + if (flag & SEEK_HFLAG) {
> + result = lseek64(file->fd, offset, SEEK_HOLE);
> + if ((result == offset) || !(flag & SEEK_DFLAG)) {
> + /*
> + * this offset is a hole or are only displaying holes.
> + * if this offset is for data and we are displaying
> + * data, then we will fall through below to
> + * initialize the data search.
> + */
> + offset = result;
> + current = HOLE;
> + goto found_hole;
> + }
> + }
> +
> + /* The offset is not a hole, or we are looking just for data */
> + current = DATA;
> + offset = lseek64(file->fd, offset, SEEK_DATA);
> +
> +found_hole:
> + /*
> + * At this point we know which type and the offset of the starting
> + * item. "current" alternates between data / hole entries in
> + * assending order - this alternation is needed even if only one
> + * type is to be displayed.
> + *
> + * An error or EOF will terminate the display, otherwise "flag"
> + * determines if there are more items to be displayed.
> + */
> + for (c = 0; flag; c++) {
> + if (offset == -1) {
> + /* print error or eof if the only entry */
> + if (errno != ENXIO || c == 0 )
> + seek_output(seekinfo[current].name, offset);
> + return 0; /* stop on error or EOF */
> + }
> +
> + seek_output(seekinfo[current].name, offset);
> +
> + /*
> + * When displaying only a single data and/or hole item, mask
> + * off the item as it is displayed. The loop will end when all
> + * requested items have been displayed.
> + */
> + if (!(flag & SEEK_RFLAG))
> + flag &= ~seekinfo[current].mask;
> +
> + current ^= 1; /* alternate between data and hole */
> + offset = lseek64(file->fd, offset, seekinfo[current].seektype);
> + }
> + return 0;
> +}
> +
> +void
> +seek_init(void)
> +{
> + seek_cmd.name = "seek";
> + seek_cmd.cfunc = seek_f;
> + seek_cmd.argmin = 2;
> + seek_cmd.argmax = 5;
> + seek_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK;
> + seek_cmd.args = _("-a | -d | -h [-r] off");
> + seek_cmd.oneline = _("locate the next data and/or hole");
> + seek_cmd.help = seek_help;
> +
> + add_command(&seek_cmd);
> +}
> Index: b/man/man8/xfs_io.8
> ===================================================================
> --- a/man/man8/xfs_io.8
> +++ b/man/man8/xfs_io.8
> @@ -418,6 +418,41 @@ to read (in bytes)
> .RE
> .PD
> .TP
> +.TP
> +.BI "seek \-a | \-d | \-h [ \-r ] offset"
> +On platforms that support the
> +.BR lseek (2)
> +.B SEEK_DATA
> +and
> +.B SEEK_HOLE
> +options, display the offsets of the specified segments.
> +.RS 1.0i
> +.PD 0
> +.TP 0.4i
> +.B \-a
> +Display both
> +.B data
> +and
> +.B hole
> +segments starting at the specified
> +.B offset.
> +.TP
> +.B \-d
> +Display the
> +.B data
> +segment starting at the specified
> +.B offset.
> +.TP
> +.B \-h
> +Display the
> +.B hole
> +segment starting at the specified
> +.B offset.
> +.TP
> +.B \-r
> +Recursively display all the specified segments starting at the specified
> +.B offset.
> +.TP
>
> .SH MEMORY MAPPED I/O COMMANDS
> .TP
>
>
> _______________________________________________
> xfs mailing list
> xfs@oss.sgi.com
> http://oss.sgi.com/mailman/listinfo/xfs
>
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support
2013-08-22 22:45 ` Eric Sandeen
@ 2013-08-23 13:26 ` Mark Tinguely
2013-08-23 13:28 ` Rich Johnston
2013-08-23 13:34 ` Eric Sandeen
0 siblings, 2 replies; 9+ messages in thread
From: Mark Tinguely @ 2013-08-23 13:26 UTC (permalink / raw)
To: Eric Sandeen; +Cc: Rich Johnston, xfs
On 08/22/13 17:45, Eric Sandeen wrote:
> On 8/22/13 4:31 PM, Mark Tinguely wrote:
>
>> Add the lseek SEEK_DATA/SEEK_HOLE support into xfs_io.
>> The result from the lseek() call will be printed to the output.
>> For example:
>>
>> xfs_io> seek -h 609k
>> HOLE 630784
>>
>> Signed-off-by: Mark Tinguely<tinguely@sgi.com>
>> ---
>> version 7 or 8 - Eric what number is this?
>
> Go for 13, for luck!
>
> I think this looks ok, I won't torture you any longer. If there's anything
> to fix up when it really gets used in earnest we can do it then.
>
> (it crossed my mind that for the "-r" and "-a" invocations it might be good to print
> out the offset which was sent for each SEEK_* "whence," but *shrug*)
>
> Thanks for all the iterations,
>
> Reviewed-by: Eric Sandeen<sandeen@redhat.com>
Rich, hold off on commit, I can quickly add the whence. We can see how
she sails.
--Mark
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support
2013-08-23 13:26 ` Mark Tinguely
@ 2013-08-23 13:28 ` Rich Johnston
2013-08-23 13:34 ` Eric Sandeen
1 sibling, 0 replies; 9+ messages in thread
From: Rich Johnston @ 2013-08-23 13:28 UTC (permalink / raw)
To: Mark Tinguely; +Cc: Eric Sandeen, xfs
On 08/23/2013 08:26 AM, Mark Tinguely wrote:
> On 08/22/13 17:45, Eric Sandeen wrote:
>> On 8/22/13 4:31 PM, Mark Tinguely wrote:
>>
>>> Add the lseek SEEK_DATA/SEEK_HOLE support into xfs_io.
>>> The result from the lseek() call will be printed to the output.
>>> For example:
>>>
>>> xfs_io> seek -h 609k
>>> HOLE 630784
>>>
>>> Signed-off-by: Mark Tinguely<tinguely@sgi.com>
>>> ---
>>> version 7 or 8 - Eric what number is this?
>>
>> Go for 13, for luck!
>>
>> I think this looks ok, I won't torture you any longer. If there's
>> anything
>> to fix up when it really gets used in earnest we can do it then.
>>
>> (it crossed my mind that for the "-r" and "-a" invocations it might be
>> good to print
>> out the offset which was sent for each SEEK_* "whence," but *shrug*)
>>
>> Thanks for all the iterations,
>>
>> Reviewed-by: Eric Sandeen<sandeen@redhat.com>
>
> Rich, hold off on commit, I can quickly add the whence. We can see how
> she sails.
>
> --Mark
>
OK
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support
2013-08-23 13:26 ` Mark Tinguely
2013-08-23 13:28 ` Rich Johnston
@ 2013-08-23 13:34 ` Eric Sandeen
2013-08-23 14:57 ` Mark Tinguely
1 sibling, 1 reply; 9+ messages in thread
From: Eric Sandeen @ 2013-08-23 13:34 UTC (permalink / raw)
To: Mark Tinguely; +Cc: Rich Johnston, xfs
On Aug 23, 2013, at 8:26 AM, Mark Tinguely <tinguely@sgi.com> wrote:
> On 08/22/13 17:45, Eric Sandeen wrote:
>> On 8/22/13 4:31 PM, Mark Tinguely wrote:
>>
>>> Add the lseek SEEK_DATA/SEEK_HOLE support into xfs_io.
>>> The result from the lseek() call will be printed to the output.
>>> For example:
>>>
>>> xfs_io> seek -h 609k
>>> HOLE 630784
>>>
>>> Signed-off-by: Mark Tinguely<tinguely@sgi.com>
>>> ---
>>> version 7 or 8 - Eric what number is this?
>>
>> Go for 13, for luck!
>>
>> I think this looks ok, I won't torture you any longer. If there's anything
>> to fix up when it really gets used in earnest we can do it then.
>>
>> (it crossed my mind that for the "-r" and "-a" invocations it might be good to print
>> out the offset which was sent for each SEEK_* "whence," but *shrug*)
>>
>> Thanks for all the iterations,
>>
>> Reviewed-by: Eric Sandeen<sandeen@redhat.com>
>
> Rich, hold off on commit, I can quickly add the whence. We can see how she sails.
>
Was just an idle thought... See if it makes sense I guess...
Thanks,
Eric
> --Mark
>
> _______________________________________________
> xfs mailing list
> xfs@oss.sgi.com
> http://oss.sgi.com/mailman/listinfo/xfs
>
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support
2013-08-23 13:34 ` Eric Sandeen
@ 2013-08-23 14:57 ` Mark Tinguely
2013-08-23 15:07 ` Eric Sandeen
0 siblings, 1 reply; 9+ messages in thread
From: Mark Tinguely @ 2013-08-23 14:57 UTC (permalink / raw)
To: Eric Sandeen, xfs-oss
On 08/23/13 08:34, Eric Sandeen wrote:
> On Aug 23, 2013, at 8:26 AM, Mark Tinguely<tinguely@sgi.com> wrote:
>
>> On 08/22/13 17:45, Eric Sandeen wrote:
>>> On 8/22/13 4:31 PM, Mark Tinguely wrote:
>>>
>>>> Add the lseek SEEK_DATA/SEEK_HOLE support into xfs_io.
>>>> The result from the lseek() call will be printed to the output.
>>>> For example:
>>>>
>>>> xfs_io> seek -h 609k
>>>> HOLE 630784
>>>>
>>>> Signed-off-by: Mark Tinguely<tinguely@sgi.com>
>>>> ---
>>>> version 7 or 8 - Eric what number is this?
>>>
>>> Go for 13, for luck!
>>>
>>> I think this looks ok, I won't torture you any longer. If there's anything
>>> to fix up when it really gets used in earnest we can do it then.
>>>
>>> (it crossed my mind that for the "-r" and "-a" invocations it might be good to print
>>> out the offset which was sent for each SEEK_* "whence," but *shrug*)
>>>
>>> Thanks for all the iterations,
>>>
>>> Reviewed-by: Eric Sandeen<sandeen@redhat.com>
>>
>> Rich, hold off on commit, I can quickly add the whence. We can see how she sails.
>>
> Was just an idle thought... See if it makes sense I guess...
>
> Thanks,
> Eric
without whence:
xfs_io> seek -ar 0
HOLE 0
DATA 528384
HOLE 532480
DATA 819200
HOLE 823296
xfs_io> seek -dh 512k
HOLE 524288
DATA 528384
xfs_io> seek -rd 0
DATA 528384
DATA 819200
============
after with whence:
xfs_io> seek -ar 0:
HOLE 0 0
DATA 0 528384
HOLE 528384 532480
DATA 532480 819200
HOLE 819200 823296
xfs_io> seek -dh 512k:
HOLE 524288
DATA 528384
xfs_io> seek -rd 0
DATA 0 528384
DATA 532480 819200
Seems to make most sense in the case of -rd and -rh
--Mark.
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support
2013-08-23 14:57 ` Mark Tinguely
@ 2013-08-23 15:07 ` Eric Sandeen
2013-08-23 15:18 ` Mark Tinguely
0 siblings, 1 reply; 9+ messages in thread
From: Eric Sandeen @ 2013-08-23 15:07 UTC (permalink / raw)
To: Mark Tinguely; +Cc: xfs-oss
On 8/23/13 9:57 AM, Mark Tinguely wrote:
> On 08/23/13 08:34, Eric Sandeen wrote:
>> On Aug 23, 2013, at 8:26 AM, Mark Tinguely<tinguely@sgi.com> wrote:
>>
>>> On 08/22/13 17:45, Eric Sandeen wrote:
>>>> On 8/22/13 4:31 PM, Mark Tinguely wrote:
>>>>
>>>>> Add the lseek SEEK_DATA/SEEK_HOLE support into xfs_io.
>>>>> The result from the lseek() call will be printed to the output.
>>>>> For example:
>>>>>
>>>>> xfs_io> seek -h 609k
>>>>> HOLE 630784
>>>>>
>>>>> Signed-off-by: Mark Tinguely<tinguely@sgi.com>
>>>>> ---
>>>>> version 7 or 8 - Eric what number is this?
>>>>
>>>> Go for 13, for luck!
>>>>
>>>> I think this looks ok, I won't torture you any longer. If there's anything
>>>> to fix up when it really gets used in earnest we can do it then.
>>>>
>>>> (it crossed my mind that for the "-r" and "-a" invocations it might be good to print
>>>> out the offset which was sent for each SEEK_* "whence," but *shrug*)
>>>>
>>>> Thanks for all the iterations,
>>>>
>>>> Reviewed-by: Eric Sandeen<sandeen@redhat.com>
>>>
>>> Rich, hold off on commit, I can quickly add the whence. We can see how she sails.
>>>
>> Was just an idle thought... See if it makes sense I guess...
>>
>> Thanks,
>> Eric
>
>
> without whence:
> xfs_io> seek -ar 0
> HOLE 0
> DATA 528384
> HOLE 532480
> DATA 819200
> HOLE 823296
>
> xfs_io> seek -dh 512k
> HOLE 524288
> DATA 528384
>
> xfs_io> seek -rd 0
> DATA 528384
> DATA 819200
>
> ============
>
> after with whence:
Don't hate me, but if you do this, now I think it needs a header ;)
I dunno, what do you think, does it have value in general?
I'd propose this: Merge it as I reviewed it, if you're happy,
just printing the results of the seeks.
I was thinking that down the line just for edge case testing
we might want to be able to pass in other "whences."
Later enhancements could also add a "-w" option to explicitly print
out the passed-in or recursively-selected "whence" if that output
is desired for comparisons or sanity checking.
Might be good to stop polishing this for now and do any other
enhancements in later patches.
Your call,
-Eric
> xfs_io> seek -ar 0:
> HOLE 0 0
> DATA 0 528384
> HOLE 528384 532480
> DATA 532480 819200
> HOLE 819200 823296
>
> xfs_io> seek -dh 512k:
>
> HOLE 524288
> DATA 528384
>
> xfs_io> seek -rd 0
> DATA 0 528384
> DATA 532480 819200
>
> Seems to make most sense in the case of -rd and -rh
>
> --Mark.
>
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support
2013-08-23 15:07 ` Eric Sandeen
@ 2013-08-23 15:18 ` Mark Tinguely
2013-08-23 15:39 ` Eric Sandeen
0 siblings, 1 reply; 9+ messages in thread
From: Mark Tinguely @ 2013-08-23 15:18 UTC (permalink / raw)
To: Eric Sandeen; +Cc: xfs-oss
On 08/23/13 10:07, Eric Sandeen wrote:
> On 8/23/13 9:57 AM, Mark Tinguely wrote:
>> On 08/23/13 08:34, Eric Sandeen wrote:
>>> On Aug 23, 2013, at 8:26 AM, Mark Tinguely<tinguely@sgi.com> wrote:
>>>
>>>> On 08/22/13 17:45, Eric Sandeen wrote:
>>>>> On 8/22/13 4:31 PM, Mark Tinguely wrote:
>>>>>
>>>>>> Add the lseek SEEK_DATA/SEEK_HOLE support into xfs_io.
>>>>>> The result from the lseek() call will be printed to the output.
>>>>>> For example:
>>>>>>
>>>>>> xfs_io> seek -h 609k
>>>>>> HOLE 630784
>>>>>>
>>>>>> Signed-off-by: Mark Tinguely<tinguely@sgi.com>
>>>>>> ---
>>>>>> version 7 or 8 - Eric what number is this?
>>>>>
>>>>> Go for 13, for luck!
>>>>>
>>>>> I think this looks ok, I won't torture you any longer. If there's anything
>>>>> to fix up when it really gets used in earnest we can do it then.
>>>>>
>>>>> (it crossed my mind that for the "-r" and "-a" invocations it might be good to print
>>>>> out the offset which was sent for each SEEK_* "whence," but *shrug*)
>>>>>
>>>>> Thanks for all the iterations,
>>>>>
>>>>> Reviewed-by: Eric Sandeen<sandeen@redhat.com>
>>>>
>>>> Rich, hold off on commit, I can quickly add the whence. We can see how she sails.
>>>>
>>> Was just an idle thought... See if it makes sense I guess...
>>>
>>> Thanks,
>>> Eric
>>
>>
>> without whence:
>> xfs_io> seek -ar 0
>> HOLE 0
>> DATA 528384
>> HOLE 532480
>> DATA 819200
>> HOLE 823296
>>
>> xfs_io> seek -dh 512k
>> HOLE 524288
>> DATA 528384
>>
>> xfs_io> seek -rd 0
>> DATA 528384
>> DATA 819200
>>
>> ============
>>
>> after with whence:
>
> Don't hate me, but if you do this, now I think it needs a header ;)
I was looking at the output and knew you were going to suggest it.
> I dunno, what do you think, does it have value in general?
>
for -ar no because we are alternating data and hole - the last result is
the new input. But for all the holes and all the data it is an improvement.
The question is should we print the starting offset in only the "-r"
option or for all cases to be consistent?
I vote to just add the starting offset in all output...
> I'd propose this: Merge it as I reviewed it, if you're happy,
> just printing the results of the seeks.
Make sense to have it. Let me post the new version. of course the real
luck of the irish is with me today, v7 has a bug in it. "wow, I could
have had a v8".
>
> I was thinking that down the line just for edge case testing
> we might want to be able to pass in other "whences."
>
> Later enhancements could also add a "-w" option to explicitly print
> out the passed-in or recursively-selected "whence" if that output
> is desired for comparisons or sanity checking.
>
> Might be good to stop polishing this for now and do any other
> enhancements in later patches.
>
> Your call,
>
> -Eric
>
>> xfs_io> seek -ar 0:
>> HOLE 0 0
>> DATA 0 528384
>> HOLE 528384 532480
>> DATA 532480 819200
>> HOLE 819200 823296
>>
>> xfs_io> seek -dh 512k:
>>
>> HOLE 524288
>> DATA 528384
>>
>> xfs_io> seek -rd 0
>> DATA 0 528384
>> DATA 532480 819200
>>
>> Seems to make most sense in the case of -rd and -rh
>>
>> --Mark.
>>
>
--Mark.
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support
2013-08-23 15:18 ` Mark Tinguely
@ 2013-08-23 15:39 ` Eric Sandeen
0 siblings, 0 replies; 9+ messages in thread
From: Eric Sandeen @ 2013-08-23 15:39 UTC (permalink / raw)
To: Mark Tinguely; +Cc: xfs-oss
On 8/23/13 10:18 AM, Mark Tinguely wrote:
> On 08/23/13 10:07, Eric Sandeen wrote:
>> On 8/23/13 9:57 AM, Mark Tinguely wrote:
>>> On 08/23/13 08:34, Eric Sandeen wrote:
>>>> On Aug 23, 2013, at 8:26 AM, Mark Tinguely<tinguely@sgi.com> wrote:
>>>>
>>>>> On 08/22/13 17:45, Eric Sandeen wrote:
>>>>>> On 8/22/13 4:31 PM, Mark Tinguely wrote:
>>>>>>
>>>>>>> Add the lseek SEEK_DATA/SEEK_HOLE support into xfs_io.
>>>>>>> The result from the lseek() call will be printed to the output.
>>>>>>> For example:
>>>>>>>
>>>>>>> xfs_io> seek -h 609k
>>>>>>> HOLE 630784
>>>>>>>
>>>>>>> Signed-off-by: Mark Tinguely<tinguely@sgi.com>
>>>>>>> ---
>>>>>>> version 7 or 8 - Eric what number is this?
>>>>>>
>>>>>> Go for 13, for luck!
>>>>>>
>>>>>> I think this looks ok, I won't torture you any longer. If there's anything
>>>>>> to fix up when it really gets used in earnest we can do it then.
>>>>>>
>>>>>> (it crossed my mind that for the "-r" and "-a" invocations it might be good to print
>>>>>> out the offset which was sent for each SEEK_* "whence," but *shrug*)
>>>>>>
>>>>>> Thanks for all the iterations,
>>>>>>
>>>>>> Reviewed-by: Eric Sandeen<sandeen@redhat.com>
>>>>>
>>>>> Rich, hold off on commit, I can quickly add the whence. We can see how she sails.
>>>>>
>>>> Was just an idle thought... See if it makes sense I guess...
>>>>
>>>> Thanks,
>>>> Eric
>>>
>>>
>>> without whence:
>>> xfs_io> seek -ar 0
>>> HOLE 0
>>> DATA 528384
>>> HOLE 532480
>>> DATA 819200
>>> HOLE 823296
>>>
>>> xfs_io> seek -dh 512k
>>> HOLE 524288
>>> DATA 528384
>>>
>>> xfs_io> seek -rd 0
>>> DATA 528384
>>> DATA 819200
>>>
>>> ============
>>>
>>> after with whence:
>>
>> Don't hate me, but if you do this, now I think it needs a header ;)
>
> I was looking at the output and knew you were going to suggest it.
>
>> I dunno, what do you think, does it have value in general?
>>
>
> for -ar no because we are alternating data and hole - the last result is the new input. But for all the holes and all the data it is an improvement.
>
> The question is should we print the starting offset in only the "-r" option or for all cases to be consistent?
I'd say either make it consistent across all outputs, or add a "-w" to explicitly print the whence, and skip it otherwise.
-Eric
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2013-08-23 15:39 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-08-22 21:31 [PATCH] xfs_io: v7 add the lseek() SEEK_DATA/SEEK_HOLE support Mark Tinguely
2013-08-22 22:45 ` Eric Sandeen
2013-08-23 13:26 ` Mark Tinguely
2013-08-23 13:28 ` Rich Johnston
2013-08-23 13:34 ` Eric Sandeen
2013-08-23 14:57 ` Mark Tinguely
2013-08-23 15:07 ` Eric Sandeen
2013-08-23 15:18 ` Mark Tinguely
2013-08-23 15:39 ` Eric Sandeen
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.