[Libguestfs] [PATCH V3] NEW API: add new api xfs_info

Add xfs_info to show the geometry of the xfs filesystem. Signed-off-by: Wanlong Gao <gaowanlong(a)cn.fujitsu.com&gt; --- Hi Rich, This version use the RStruct as you said, but I also got some thing wrong, please help reviewing and give some advises about fixing or debugging. Thanks, Wanlong Gao daemon/Makefile.am | 1 + daemon/xfs.c | 306 +++++++++++++++++++++++++++++++ generator/generator_actions.ml | 6 + generator/generator_structs.ml | 30 +++ gobject/Makefile.inc | 2 + java/Makefile.inc | 1 + java/com/redhat/et/libguestfs/.gitignore | 1 + po/POTFILES | 2 + src/MAX_PROC_NR | 2 +- 9 files changed, 350 insertions(+), 1 deletion(-) create mode 100644 daemon/xfs.c diff --git a/daemon/Makefile.am b/daemon/Makefile.am index 9e2a633..afe8874 100644 --- a/daemon/Makefile.am +++ b/daemon/Makefile.am @@ -165,6 +165,7 @@ guestfsd_SOURCES = \ utimens.c \ wc.c \ xattr.c \ + xfs.c \ zero.c \ zerofree.c guestfsd_LDADD = \ diff --git a/daemon/xfs.c b/daemon/xfs.c new file mode 100644 index 0000000..47d027d --- /dev/null +++ b/daemon/xfs.c @@ -0,0 +1,306 @@ +/* libguestfs - the guestfsd daemon + * Copyright (C) 2012 Fujitsu Limited. + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will 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 to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <config.h> + +#include <stdio.h> +#include <stdlib.h> +#include <inttypes.h> +#include <string.h> +#include <unistd.h> + +#include "guestfs_protocol.h" +#include "daemon.h" +#include "c-ctype.h" +#include "actions.h" + +int +optgroup_xfs_available (void) +{ + return prog_exists ("mkfs.xfs"); +} + +static char * +split_strdup (char *string) +{ + char *end = string; + while (*end != ' ' && *end != ',') end++; + size_t len = end - string; + char *ret = malloc (len + 1); + if (!ret) { + reply_with_perror ("malloc"); + return NULL; + } + strncpy (ret, string, len); + ret[len] = '\0'; + fprintf(stderr, "%s\n", ret); + return ret; +} + +static int +parse_uint32 (uint32_t *ret, const char *str) +{ + uint32_t r; + + if (sscanf (str, "%" SCNu32, &r) != 1) { + reply_with_error ("cannot parse numeric field from isoinfo: %s", str); + return -1; + } + + *ret = r; + return 0; +} + +static int +parse_uint64 (uint64_t *ret, const char *str) +{ + uint64_t r; + + if (sscanf (str, "%" SCNu64, &r) != 1) { + reply_with_error ("cannot parse numeric field from isoinfo: %s", str); + return -1; + } + + *ret = r; + return 0; +} + +static guestfs_int_xfsinfo * +parse_xfs_info (char **lines) +{ + guestfs_int_xfsinfo *ret; + char *buf, *p; + size_t i; + + ret = calloc (1, sizeof *ret); + if (ret == NULL) { + reply_with_error ("calloc"); + return NULL; + } +#if 0 + ret->inodesize = (uint32_t) -1; + ret->agcount = (uint32_t) -1; + ret->agsize = (uint32_t) -1; + ret->sectsize = (uint32_t) -1; + ret->attr = (uint32_t) -1; + ret->blocksize = (uint32_t) -1; + ret->datablocks = (uint64_t) -1; + ret->imaxpct = (uint32_t) -1; + ret->sunit = (uint32_t) -1; + ret->swidth = (uint32_t) -1; + ret->dirversion = (uint32_t) -1; + ret->dirblocksize = (uint32_t) -1; + ret->cimode = (uint32_t) -1; + ret->logblocksize = (uint32_t) -1; + ret->logblocks = (uint32_t) -1; + ret->logversion = (uint32_t) -1; + ret->logsectsize = (uint32_t) -1; + ret->logsunit = (uint32_t) -1; + ret->lazycount = (uint32_t) -1; + ret->rtextsize = (uint32_t) -1; + ret->rtblocks = (uint64_t) -1; + ret->rtextents = (uint64_t) -1; +#endif + + for (i = 0; lines[i] != NULL; ++i) { + if (p = strstr (lines[i], "meta-data=")) { + ret->mntpoint = split_strdup (p + 10); + if (ret->mntpoint == NULL) goto error; + } else if (p = strstr (lines[i], "isize=")) { + buf = split_strdup (p + 6); + if (buf == NULL) goto error; + if (parse_uint32 (&ret->inodesize, buf) == -1) + goto error; + } else if (p = strstr (lines[i], "agcount=")) { + buf = split_strdup (p + 8); + if (buf == NULL) goto error; + if (parse_uint32 (&ret->agcount, buf) == -1) + goto error; + } else if (p = strstr (lines[i], "agsize=")) { + buf = split_strdup (p + 7); + if (buf == NULL) goto error; + if (parse_uint32 (&ret->agsize, buf) == -1) + goto error; + } else if (p = strstr (lines[i], "sectsz=")) { + buf = split_strdup (p + 7); + if (buf == NULL) goto error; + if (i == 1) + if (parse_uint32 (&ret->sectsize, buf) == -1) + goto error; + else if (i == 6) + if (parse_uint32 (&ret->logsectsize, buf) == -1) + goto error; + else goto error; + } else if (p = strstr (lines[i], "attr=")) { + buf = split_strdup (p + 5); + if (buf == NULL) goto error; + if (parse_uint32 (&ret->attr, buf) == -1) + goto error; + } else if (p = strstr (lines[i], "bsize=")) { + buf = split_strdup (p + 6); + if (buf == NULL) goto error; + if (i == 2) + if (parse_uint32 (&ret->blocksize, buf) == -1) + goto error; + else if (i == 4) + if (parse_uint32 (&ret->dirblocksize, buf) == -1) + goto error; + else if (i == 5) + if (parse_uint32 (&ret->logblocksize, buf) == -1) + goto error; + else goto error; + } else if (p = strstr (lines[i], "blocks=")) { + buf = split_strdup (p + 7); + if (buf == NULL) goto error; + if (i == 2) + if (parse_uint64 (&ret->datablocks, buf) == -1) + goto error; + else if (i == 5) + if (parse_uint32 (&ret->logblocks, buf) == -1) + goto error; + else if (i == 7) + if (parse_uint64 (&ret->rtblocks, buf) == -1) + goto error; + else goto error; + } else if (p = strstr (lines[i], "imaxpct=")) { + buf = split_strdup (p + 8); + if (buf == NULL) goto error; + if (parse_uint32 (&ret->imaxpct, buf) == -1) + goto error; + } else if (p = strstr (lines[i], "sunit=")) { + buf = split_strdup (p + 6); + if (buf == NULL) goto error; + if (i == 3) + if (parse_uint32 (&ret->sunit, buf) == -1) + goto error; + else if (i == 6) + if (parse_uint32 (&ret->logsunit, buf) == -1) + goto error; + else goto error; + } else if (p = strstr (lines[i], "swidth=")) { + buf = split_strdup (p + 7); + if (buf == NULL) goto error; + if (parse_uint32 (&ret->swidth, buf) == -1) + goto error; + } else if (p = strstr (lines[i], "naming =version ")) { + buf = split_strdup (p + 18); + if (buf == NULL) goto error; + if (parse_uint32 (&ret->dirversion, buf) == -1) + goto error; + } else if (p = strstr (lines[i], "ascii-ci=")) { + buf = split_strdup (p + 9); + if (buf == NULL) goto error; + if (parse_uint32 (&ret->cimode, buf) == -1) + goto error; + } else if (p = strstr (lines[i], "log =")) { + ret->logname = split_strdup (p + 10); + if (ret->logname == NULL) goto error; + } else if (p = strstr (lines[i], "version=")) { + buf = split_strdup (p + 8); + if (buf == NULL) goto error; + if (parse_uint32 (&ret->logversion, buf) == -1) + goto error; + } else if (p = strstr (lines[i], "lazy-count=")) { + buf = split_strdup (p + 11); + if (buf == NULL) goto error; + if (parse_uint32 (&ret->lazycount, buf) == -1) + goto error; + } else if (p = strstr (lines[i], "realtime =")) { + ret->rtname = split_strdup (p + 10); + if (ret->rtname == NULL) goto error; + } else if (p = strstr (lines[i], "rtextents=")) { + buf = split_strdup (p + 10); + if (buf == NULL) goto error; + if (parse_uint64 (&ret->rtextents, buf) == -1) + goto error; + } + } + + if (ret->mntpoint == NULL) { + ret->mntpoint = strdup (""); + if (ret->mntpoint == NULL) goto error; + } + if (ret->logname == NULL) { + ret->logname = strdup (""); + if (ret->logname == NULL) goto error; + } + if (ret->rtname == NULL) { + ret->rtname = strdup (""); + if (ret->rtname == NULL) goto error; + } + + return ret; + +error: + free (buf); + free (ret->mntpoint); + free (ret->logname); + free (ret->rtname); + free (ret); +} + +guestfs_int_xfsinfo * +do_xfs_info (const char *path) +{ + int r; + char *buf; + char *out = NULL, *err = NULL; + char **lines = NULL; + guestfs_int_xfsinfo *ret; + + if (do_is_dir (path)) { + buf = sysroot_path (path); + if (!buf) { + reply_with_perror ("malloc"); + return NULL; + } + } else { + buf = strdup(path); + if (!buf) { + reply_with_perror ("strdup"); + return NULL; + } + } + + r = command (&out, &err, "xfs_info", buf, NULL); + free (buf); + if (r == -1) { + reply_with_error ("%s", err); + goto error; + } + + lines = split_lines (out); + if (lines == NULL) + goto error; + + ret = parse_xfs_info (lines); + if (ret == NULL) + goto error; + + free (err); + free (out); + free_strings (lines); + return ret; + +error: + free (out); + free (err); + if (lines) + free_strings (lines); + return NULL; +} diff --git a/generator/generator_actions.ml b/generator/generator_actions.ml index beb2b3c..6d21351 100644 --- a/generator/generator_actions.ml +++ b/generator/generator_actions.ml @@ -8995,6 +8995,12 @@ be returned if you called C<guestfs_list_devices>. To find out the maximum number of devices that could be added, call C<guestfs_max_disks>." }; + ("xfs_info", (RStruct ("info", "xfsinfo"), [Pathname "path"], []), 337, [Optional "xfs"], + [], + "get geometry of XFS filesystem", + "\ +Thie function can print out the geometry of an mounted XFS filesystem."); + ] (* Non-API meta-commands available only in guestfish. diff --git a/generator/generator_structs.ml b/generator/generator_structs.ml index 024bb3c..3dded35 100644 --- a/generator/generator_structs.ml +++ b/generator/generator_structs.ml @@ -213,6 +213,35 @@ let structs = [ "iso_volume_effective_t", FInt64; ]; + (* XFS info descriptor. *) + "xfsinfo", [ + "mntpoint", FString; + "inodesize", FUInt32; + "agcount", FUInt32; + "agsize", FUInt32; + "sectsize", FUInt32; + "attr", FUInt32; + "blocksize", FUInt32; + "datablocks", FUInt64; + "imaxpct", FUInt32; + "sunit", FUInt32; + "swidth", FUInt32; + "dirversion", FUInt32; + "dirblocksize", FUInt32; + "cimode", FInt32; + "logname", FString; + "logblocksize", FUInt32; + "logblocks", FUInt32; + "logversion", FUInt32; + "logsectsize", FUInt32; + "logsunit", FUInt32; + "lazycount", FUInt32; + "rtname", FString; + "rtextsize", FUInt32; + "rtblocks", FUInt64; + "rtextents", FUInt64; + ]; + (* /proc/mdstat information. See linux.git/drivers/md/md.c *) "mdstat", [ "mdstat_device", FString; @@ -243,6 +272,7 @@ let camel_structs = [ "partition", "Partition"; "application", "Application"; "isoinfo", "ISOInfo"; + "xfsinfo", "XFSInfo"; "mdstat", "MDStat"; "btrfssubvolume", "BTRFSSubvolume"; ] diff --git a/gobject/Makefile.inc b/gobject/Makefile.inc index e84236d..d70e106 100644 --- a/gobject/Makefile.inc +++ b/gobject/Makefile.inc @@ -36,6 +36,7 @@ guestfs_gobject_headers= \ include/guestfs-gobject/struct-partition.h \ include/guestfs-gobject/struct-application.h \ include/guestfs-gobject/struct-isoinfo.h \ + include/guestfs-gobject/struct-xfsinfo.h \ include/guestfs-gobject/struct-mdstat.h \ include/guestfs-gobject/struct-btrfssubvolume.h \ include/guestfs-gobject/optargs-internal_test.h \ @@ -80,6 +81,7 @@ guestfs_gobject_sources= \ src/struct-partition.c \ src/struct-application.c \ src/struct-isoinfo.c \ + src/struct-xfsinfo.c \ src/struct-mdstat.c \ src/struct-btrfssubvolume.c \ src/optargs-internal_test.c \ diff --git a/java/Makefile.inc b/java/Makefile.inc index efad2a0..da8de49 100644 --- a/java/Makefile.inc +++ b/java/Makefile.inc @@ -35,4 +35,5 @@ java_built_sources = \ com/redhat/et/libguestfs/VG.java \ com/redhat/et/libguestfs/Version.java \ com/redhat/et/libguestfs/XAttr.java \ + com/redhat/et/libguestfs/XFSInfo.java \ com/redhat/et/libguestfs/GuestFS.java diff --git a/java/com/redhat/et/libguestfs/.gitignore b/java/com/redhat/et/libguestfs/.gitignore index 9556d81..1034665 100644 --- a/java/com/redhat/et/libguestfs/.gitignore +++ b/java/com/redhat/et/libguestfs/.gitignore @@ -13,3 +13,4 @@ StatVFS.java VG.java Version.java XAttr.java +XFSInfo.java diff --git a/po/POTFILES b/po/POTFILES index 6c819d3..c8ec38d 100644 --- a/po/POTFILES +++ b/po/POTFILES @@ -84,6 +84,7 @@ daemon/upload.c daemon/utimens.c daemon/wc.c daemon/xattr.c +daemon/xfs.c daemon/zero.c daemon/zerofree.c df/df.c @@ -173,6 +174,7 @@ gobject/src/struct-stat.c gobject/src/struct-statvfs.c gobject/src/struct-version.c gobject/src/struct-xattr.c +gobject/src/struct-xfsinfo.c gobject/src/tristate.c inspector/virt-inspector.c java/com_redhat_et_libguestfs_GuestFS.c diff --git a/src/MAX_PROC_NR b/src/MAX_PROC_NR index e64f24d..f59a90f 100644 --- a/src/MAX_PROC_NR +++ b/src/MAX_PROC_NR @@ -1 +1 @@ -336 +337 -- 1.7.11.1.165.g299666c