On Tue, Mar 21, 2017 at 05:49:28PM -0400, Darrick J. Wong wrote:
> On Tue, Mar 21, 2017 at 03:03:29PM -0400, Eric Sandeen wrote:
> > Wire up the statx syscall to xfs_io.
> >
> > xfs_io> help statx
> > statx [-O | -m mask][-FDLAP] -- extended information about the currently open file
> >
> > Display extended file status.
> >
> > Options:
> > -m mask -- Specify the field mask for the statx call (default STATX_ALL)
> > -A -- Suppress terminal automount traversal
> > -D -- Don't sync attributes with the server
> > -F -- Force the attributes to be sync'd with the server
> > -L -- Follow symlinks (statx link target)
> > -O -- Remove basic stats (STATX_BASIC_STATS) from default mask
> > -P -- pretty-print results similar to stat(1)
> >
> > Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
> > ---
> >
> > diff --git a/io/init.c b/io/init.c
> > index 06002e6..c15a1e1 100644
> > --- a/io/init.c
> > +++ b/io/init.c
> > @@ -86,6 +86,7 @@ init_commands(void)
> > seek_init();
> > sendfile_init();
> > shutdown_init();
> > + stat_init();
> > sync_init();
> > sync_range_init();
> > truncate_init();
> > diff --git a/io/io.h b/io/io.h
> > index 7e95bd5..952bdb8 100644
> > --- a/io/io.h
> > +++ b/io/io.h
> > @@ -112,6 +112,7 @@ extern void pwrite_init(void);
> > extern void quit_init(void);
> > extern void seek_init(void);
> > extern void shutdown_init(void);
> > +extern void stat_init(void);
> > extern void sync_init(void);
> > extern void truncate_init(void);
> > extern void utimes_init(void);
> > diff --git a/io/stat.c b/io/stat.c
> > index 3ae9903..3b3d21d 100644
> > --- a/io/stat.c
> > +++ b/io/stat.c
> > @@ -2,6 +2,9 @@
> > * Copyright (c) 2003-2005 Silicon Graphics, Inc.
> > * All Rights Reserved.
> > *
> > + * Copyright (C) 2015, 2017 Red Hat, Inc.
> > + * Portions of statx support written by David Howells (dhowells@xxxxxxxxxx)
> > + *
> > * 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.
> > @@ -20,10 +23,14 @@
> > #include "input.h"
> > #include "init.h"
> > #include "io.h"
> > +#include "statx.h"
> > #include "libxfs.h"
> >
> > +#include <fcntl.h>
> > +
> > static cmdinfo_t stat_cmd;
> > static cmdinfo_t statfs_cmd;
> > +static cmdinfo_t statx_cmd;
> >
> > off64_t
> > filesize(void)
> > @@ -167,6 +174,289 @@ statfs_f(
> > return 0;
> > }
> >
> > +#ifndef AT_STATX_SYNC_TYPE
> > +#define AT_STATX_SYNC_TYPE 0x6000 /* Type of synchronisation required from statx() */
> > +#define AT_STATX_SYNC_AS_STAT 0x0000 /* - Do whatever stat() does */
> > +#define AT_STATX_FORCE_SYNC 0x2000 /* - Force the attributes to be sync'd with the server */
> > +#define AT_STATX_DONT_SYNC 0x4000 /* - Don't sync attributes with the server */
> > +#endif
> > +
> > +#ifndef AT_NO_AUTOMOUNT
> > +#define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount traversal */
> > +#endif
> > +
> > +/* XXX ERS fixme */
> > +#define __NR_statx 332
>
> fixit? :)
>
> > +
> > +static ssize_t
> > +statx(int dfd, const char *filename, unsigned flags,
> > + unsigned int mask, struct statx *buffer)
> > +{
> > + return syscall(__NR_statx, dfd, filename, flags, mask, buffer);
> > +}
> > +
> > +static void
> > +statx_help(void)
> > +{
> > + printf(_(
> > +"\n"
> > +" Display extended file status.\n"
> > +"\n"
> > +" Options:\n"
> > +" -m mask -- Specify the field mask for the statx call (default STATX_ALL)\n"
> > +" -A -- Suppress terminal automount traversal\n"
> > +" -D -- Don't sync attributes with the server\n"
> > +" -F -- Force the attributes to be sync'd with the server\n"
> > +" -L -- Follow symlinks (statx link target)\n"
> > +" -O -- Remove basic stats (STATX_BASIC_STATS) from default mask\n"
> > +" -P -- pretty-print results similar to stat(1)\n"
> > +"\n"));
> > +}
> > +
> > +/* statx helper */
> > +static void
> > +raw_statx(struct statx *stx)
> > +{
> > + printf("stx_mask: 0x%x\n", stx->stx_mask);
> > + printf("stx_blksize: %u\n", stx->stx_blksize);
> > + printf("stx_attributes: 0x%llx\n", stx->stx_attributes);
> > + printf("stx_nlink: %u\n", stx->stx_nlink);
> > + printf("stx_uid: %u\n", stx->stx_uid);
> > + printf("stx_gid: %u\n", stx->stx_gid);
> > + printf("stx_mode: 0%o\n", stx->stx_mode);
> > + printf("stx_ino: %llu\n", stx->stx_ino);
> > + printf("stx_size: %llu\n", stx->stx_size);
> > + printf("stx_blocks: %llu\n", stx->stx_blocks);
> > + printf("stx_atime.tv_sec: %lld\n", stx->stx_atime.tv_sec);
> > + printf("stx_atime.tv_nsec: %d\n", stx->stx_atime.tv_nsec);
> > + printf("stx_btime.tv_sec: %lld\n", stx->stx_btime.tv_sec);
> > + printf("stx_btime.tv_nsec: %d\n", stx->stx_btime.tv_nsec);
Also I forgot to mention that we shouldn't print btime unless
STATX_BTIME is set.
Put another way, the mask filtering you do in the pretty print function
ought to be repeated here too, right?
--D
> > + printf("stx_ctime.tv_sec: %lld\n", stx->stx_ctime.tv_sec);
> > + printf("stx_ctime.tv_nsec: %d\n", stx->stx_ctime.tv_nsec);
> > + printf("stx_mtime.tv_sec: %lld\n", stx->stx_mtime.tv_sec);
> > + printf("stx_mtime.tv_nsec: %d\n", stx->stx_mtime.tv_nsec);
> > + printf("stx_rdev_major: %u\n", stx->stx_rdev_major);
> > + printf("stx_rdev_minor: %u\n", stx->stx_rdev_minor);
> > + printf("stx_dev_major: %u\n", stx->stx_dev_major);
> > + printf("stx_dev_minor: %u\n", stx->stx_dev_minor);
> > +}
> > +
> > +/* statx helper */
> > +static void
> > +print_time(const char *field, struct statx_timestamp *ts)
> > +{
> > + struct tm tm;
> > + time_t tim;
> > + char buffer[100];
> > + int len;
> > +
> > + tim = ts->tv_sec;
> > + if (!localtime_r(&tim, &tm)) {
> > + perror("localtime_r");
> > + exit(1);
> > + }
> > + len = strftime(buffer, 100, "%F %T", &tm);
> > + if (len == 0) {
> > + perror("strftime");
> > + exit(1);
> > + }
> > + printf("%s", field);
> > + fwrite(buffer, 1, len, stdout);
> > + printf(".%09u", ts->tv_nsec);
> > + len = strftime(buffer, 100, "%z", &tm);
> > + if (len == 0) {
> > + perror("strftime2");
> > + exit(1);
> > + }
> > + fwrite(buffer, 1, len, stdout);
> > + printf("\n");
> > +}
> > +
> > +/* statx helper */
> > +static void
> > +pretty_statx(struct statx *stx)
> > +{
> > + char buffer[256], ft;
> > +
> > + printf(" ");
> > + if (stx->stx_mask & STATX_SIZE)
> > + printf(" Size: %-15llu", (unsigned long long)stx->stx_size);
> > + if (stx->stx_mask & STATX_BLOCKS)
> > + printf(" Blocks: %-10llu", (unsigned long long)stx->stx_blocks);
> > + printf(" IO Block: %-6llu", (unsigned long long)stx->stx_blksize);
> > +
> > + ft = '?';
> > + if (stx->stx_mask & STATX_TYPE) {
> > + switch (stx->stx_mode & S_IFMT) {
> > + case S_IFIFO: printf(" FIFO\n"); ft = 'p'; break;
> > + case S_IFCHR: printf(" character special file\n"); ft = 'c'; break;
> > + case S_IFDIR: printf(" directory\n"); ft = 'd'; break;
> > + case S_IFBLK: printf(" block special file\n"); ft = 'b'; break;
> > + case S_IFREG: printf(" regular file\n"); ft = '-'; break;
> > + case S_IFLNK: printf(" symbolic link\n"); ft = 'l'; break;
> > + case S_IFSOCK: printf(" socket\n"); ft = 's'; break;
> > + default:
> > + printf(" unknown type (%o)\n", stx->stx_mode & S_IFMT);
> > + break;
> > + }
> > + } else {
> > + printf(" no type\n");
> > + }
> > +
> > + sprintf(buffer, "%02x:%02x", stx->stx_dev_major, stx->stx_dev_minor);
> > + printf("Device: %-15s", buffer);
> > + if (stx->stx_mask & STATX_INO)
> > + printf(" Inode: %-11llu", (unsigned long long) stx->stx_ino);
> > + if (stx->stx_mask & STATX_NLINK)
> > + printf(" Links: %-5u", stx->stx_nlink);
> > + if (stx->stx_mask & STATX_TYPE) {
> > + switch (stx->stx_mode & S_IFMT) {
> > + case S_IFBLK:
> > + case S_IFCHR:
> > + printf(" Device type: %u,%u",
> > + stx->stx_rdev_major, stx->stx_rdev_minor);
> > + break;
> > + }
> > + }
> > + printf("\n");
> > +
> > + if (stx->stx_mask & STATX_MODE)
> > + printf("Access: (%04o/%c%c%c%c%c%c%c%c%c%c) ",
> > + stx->stx_mode & 07777,
> > + ft,
> > + stx->stx_mode & S_IRUSR ? 'r' : '-',
> > + stx->stx_mode & S_IWUSR ? 'w' : '-',
> > + stx->stx_mode & S_IXUSR ? 'x' : '-',
> > + stx->stx_mode & S_IRGRP ? 'r' : '-',
> > + stx->stx_mode & S_IWGRP ? 'w' : '-',
> > + stx->stx_mode & S_IXGRP ? 'x' : '-',
> > + stx->stx_mode & S_IROTH ? 'r' : '-',
> > + stx->stx_mode & S_IWOTH ? 'w' : '-',
> > + stx->stx_mode & S_IXOTH ? 'x' : '-');
> > + if (stx->stx_mask & STATX_UID)
> > + printf("Uid: %5d ", stx->stx_uid);
> > + if (stx->stx_mask & STATX_GID)
> > + printf("Gid: %5d\n", stx->stx_gid);
> > +
> > + if (stx->stx_mask & STATX_ATIME)
> > + print_time("Access: ", &stx->stx_atime);
> > + if (stx->stx_mask & STATX_MTIME)
> > + print_time("Modify: ", &stx->stx_mtime);
> > + if (stx->stx_mask & STATX_CTIME)
> > + print_time("Change: ", &stx->stx_ctime);
> > + if (stx->stx_mask & STATX_BTIME)
> > + print_time(" Birth: ", &stx->stx_btime);
> > +
> > + if (stx->stx_attributes) {
> > + unsigned char bits;
> > + int loop, byte;
> > +
> > + static char attr_representation[64 + 1] =
> > + /* STATX_ATTR_ flags: */
> > + "????????" /* 63-56 */
> > + "????????" /* 55-48 */
> > + "????????" /* 47-40 */
> > + "????????" /* 39-32 */
> > + "????????" /* 31-24 0x00000000-ff000000 */
> > + "????????" /* 23-16 0x00000000-00ff0000 */
> > + "???mE???" /* 15- 8 0x00000000-0000ff00 */
> > + "?dai?c??" /* 7- 0 0x00000000-000000ff */
> > + ;
> > +
> > + printf("Attributes: %016llx\n", stx->stx_attributes);
> > + printf("(");
> > + for (byte = 64 - 8; byte >= 0; byte -= 8) {
> > + bits = stx->stx_attributes >> byte;
> > + for (loop = 7; loop >= 0; loop--) {
> > + int bit = byte + loop;
> > +
> > + if (bits & 0x80)
> > + putchar(attr_representation[63 - bit]);
> > + else
> > + putchar('-');
> > + bits <<= 1;
> > + }
> > + if (byte)
> > + putchar(' ');
> > + }
> > + printf(")\n");
> > + }
> > +}
> > +
> > +/*
> > + * options:
> > + * - input flags - query type
> > + * - output style for flags (and all else?) (chars vs. hex?)
> > + * - output - mask out incidental flag or not?
> > + */
> > +int
> > +statx_f(
> > + int argc,
> > + char **argv)
> > +{
> > + int c;
> > + int pretty = 0;
> > + struct statx stx;
> > + int atflag = AT_SYMLINK_NOFOLLOW;
> > + unsigned int m_mask = 0; /* mask requested with -m */
> > + int Oflag = 0, mflag = 0; /* -O or -m was used */
> > + unsigned int mask = STATX_ALL;
>
> Whitespace, bleh....
>
> > +
> > + while ((c = getopt(argc, argv, "m:FDLOAP")) != EOF) {
> > + switch (c) {
> > + case 'm':
> > + m_mask = atoi(optarg);
> > + mflag = 1;
> > + break;
> > + case 'F':
> > + atflag &= ~AT_STATX_SYNC_TYPE;
> > + atflag |= AT_STATX_FORCE_SYNC;
> > + break;
> > + case 'D':
> > + atflag &= ~AT_STATX_SYNC_TYPE;
> > + atflag |= AT_STATX_DONT_SYNC;
> > + break;
> > + case 'L':
> > + atflag &= ~AT_SYMLINK_NOFOLLOW;
> > + break;
> > + case 'O':
> > + mask &= ~STATX_BASIC_STATS;
> > + Oflag = 1;
> > + break;
> > + case 'A':
> > + atflag |= AT_NO_AUTOMOUNT;
> > + break;
> > + case 'P':
> > + pretty = 1;
> > + break;
> > + default:
> > + printf("errror\n");
>
> command_usage(...)?
>
> > + }
> > + }
> > +
> > + if (Oflag && mflag) {
> > + printf("Cannot specify both -m mask and -O\n");
> > + return 0;
> > + }
> > +
> > + /* -m overrides any other mask options */
> > + if (mflag)
> > + mask = m_mask;
> > +
> > + memset(&stx, 0xbf, sizeof(stx));
> > + if (statx(AT_FDCWD, file->name, atflag, mask, &stx) < 0) {
> > + perror("statx");
> > + return 0;
> > + }
> > +
> > + if (pretty)
> > + pretty_statx(&stx);
> > + else
> > + raw_statx(&stx);
> > +
> > + return 0;
> > +}
> > +
> > void
> > stat_init(void)
> > {
> > @@ -176,14 +466,25 @@ stat_init(void)
> > stat_cmd.argmax = 1;
> > stat_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK;
> > stat_cmd.args = _("[-v]");
> > - stat_cmd.oneline = _("statistics on the currently open file");
> > + stat_cmd.oneline = _("imformation about the currently open file");
>
> "information..."
>
> >
> > statfs_cmd.name = "statfs";
> > statfs_cmd.cfunc = statfs_f;
> > statfs_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK;
> > statfs_cmd.oneline =
> > - _("statistics on the filesystem of the currently open file");
> > + _("information about the filesystem of the currently open file");
> > +
> > + statx_cmd.name = "statx";
> > + statx_cmd.cfunc = statx_f;
> > + statx_cmd.argmin = 0;
> > + statx_cmd.argmax = -1;
> > + statx_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK;
> > + statx_cmd.args = _("[-O | -m mask][-FDLAP]");
> > + statx_cmd.oneline =
> > + _("extended information about the currently open file");
> > + statx_cmd.help = statx_help;
> >
> > add_command(&stat_cmd);
> > add_command(&statfs_cmd);
> > + add_command(&statx_cmd);
> > }
> > diff --git a/io/statx.h b/io/statx.h
> > new file mode 100644
> > index 0000000..7e024d1
> > --- /dev/null
> > +++ b/io/statx.h
> > @@ -0,0 +1,137 @@
> > +#ifndef XFS_IO_STATX_H
> > +#define XFS_IO_STATX_H
> > +
> > +#ifndef STATX_TYPE
> > +
> > +/*
> > + * Timestamp structure for the timestamps in struct statx.
> > + *
> > + * tv_sec holds the number of seconds before (negative) or after (positive)
> > + * 00:00:00 1st January 1970 UTC.
> > + *
> > + * tv_nsec holds a number of nanoseconds before (0..-999,999,999 if tv_sec is
> > + * negative) or after (0..999,999,999 if tv_sec is positive) the tv_sec time.
> > + *
> > + * Note that if both tv_sec and tv_nsec are non-zero, then the two values must
> > + * either be both positive or both negative.
> > + *
> > + * __reserved is held in case we need a yet finer resolution.
> > + */
> > +struct statx_timestamp {
> > + __s64 tv_sec;
> > + __s32 tv_nsec;
> > + __s32 __reserved;
> > +};
> > +
> > +/*
> > + * Structures for the extended file attribute retrieval system call
> > + * (statx()).
> > + *
> > + * The caller passes a mask of what they're specifically interested in as a
> > + * parameter to statx(). What statx() actually got will be indicated in
> > + * st_mask upon return.
> > + *
> > + * For each bit in the mask argument:
> > + *
> > + * - if the datum is not supported:
> > + *
> > + * - the bit will be cleared, and
> > + *
> > + * - the datum will be set to an appropriate fabricated value if one is
> > + * available (eg. CIFS can take a default uid and gid), otherwise
> > + *
> > + * - the field will be cleared;
> > + *
> > + * - otherwise, if explicitly requested:
> > + *
> > + * - the datum will be synchronised to the server if AT_STATX_FORCE_SYNC is
> > + * set or if the datum is considered out of date, and
> > + *
> > + * - the field will be filled in and the bit will be set;
> > + *
> > + * - otherwise, if not requested, but available in approximate form without any
> > + * effort, it will be filled in anyway, and the bit will be set upon return
> > + * (it might not be up to date, however, and no attempt will be made to
> > + * synchronise the internal state first);
> > + *
> > + * - otherwise the field and the bit will be cleared before returning.
> > + *
> > + * Items in STATX_BASIC_STATS may be marked unavailable on return, but they
> > + * will have values installed for compatibility purposes so that stat() and
> > + * co. can be emulated in userspace.
> > + */
> > +struct statx {
> > + /* 0x00 */
> > + __u32 stx_mask; /* What results were written [uncond] */
> > + __u32 stx_blksize; /* Preferred general I/O size [uncond] */
> > + __u64 stx_attributes; /* Flags conveying information about the file [uncond] */
> > + /* 0x10 */
> > + __u32 stx_nlink; /* Number of hard links */
> > + __u32 stx_uid; /* User ID of owner */
> > + __u32 stx_gid; /* Group ID of owner */
> > + __u16 stx_mode; /* File mode */
> > + __u16 __spare0[1];
> > + /* 0x20 */
> > + __u64 stx_ino; /* Inode number */
> > + __u64 stx_size; /* File size */
> > + __u64 stx_blocks; /* Number of 512-byte blocks allocated */
> > + __u64 __spare1[1];
> > + /* 0x40 */
> > + struct statx_timestamp stx_atime; /* Last access time */
> > + struct statx_timestamp stx_btime; /* File creation time */
> > + struct statx_timestamp stx_ctime; /* Last attribute change time */
> > + struct statx_timestamp stx_mtime; /* Last data modification time */
> > + /* 0x80 */
> > + __u32 stx_rdev_major; /* Device ID of special file [if bdev/cdev] */
> > + __u32 stx_rdev_minor;
> > + __u32 stx_dev_major; /* ID of device containing file [uncond] */
> > + __u32 stx_dev_minor;
> > + /* 0x90 */
> > + __u64 __spare2[14]; /* Spare space for future expansion */
> > + /* 0x100 */
> > +};
> > +
> > +/*
> > + * Flags to be stx_mask
> > + *
> > + * Query request/result mask for statx() and struct statx::stx_mask.
> > + *
> > + * These bits should be set in the mask argument of statx() to request
> > + * particular items when calling statx().
> > + */
> > +#define STATX_TYPE 0x00000001U /* Want/got stx_mode & S_IFMT */
> > +#define STATX_MODE 0x00000002U /* Want/got stx_mode & ~S_IFMT */
> > +#define STATX_NLINK 0x00000004U /* Want/got stx_nlink */
> > +#define STATX_UID 0x00000008U /* Want/got stx_uid */
> > +#define STATX_GID 0x00000010U /* Want/got stx_gid */
> > +#define STATX_ATIME 0x00000020U /* Want/got stx_atime */
> > +#define STATX_MTIME 0x00000040U /* Want/got stx_mtime */
> > +#define STATX_CTIME 0x00000080U /* Want/got stx_ctime */
> > +#define STATX_INO 0x00000100U /* Want/got stx_ino */
> > +#define STATX_SIZE 0x00000200U /* Want/got stx_size */
> > +#define STATX_BLOCKS 0x00000400U /* Want/got stx_blocks */
> > +#define STATX_BASIC_STATS 0x000007ffU /* The stuff in the normal stat struct */
> > +#define STATX_BTIME 0x00000800U /* Want/got stx_btime */
> > +#define STATX_ALL 0x00000fffU /* All currently supported flags */
> > +
> > +/*
> > + * Attributes to be found in stx_attributes
> > + *
> > + * These give information about the features or the state of a file that might
> > + * be of use to ordinary userspace programs such as GUIs or ls rather than
> > + * specialised tools.
> > + *
> > + * Note that the flags marked [I] correspond to generic FS_IOC_FLAGS
> > + * semantically. Where possible, the numerical value is picked to correspond
> > + * also.
> > + */
> > +#define STATX_ATTR_COMPRESSED 0x00000004 /* [I] File is compressed by the fs */
> > +#define STATX_ATTR_IMMUTABLE 0x00000010 /* [I] File is marked immutable */
> > +#define STATX_ATTR_APPEND 0x00000020 /* [I] File is append-only */
> > +#define STATX_ATTR_NODUMP 0x00000040 /* [I] File is not to be dumped */
> > +#define STATX_ATTR_ENCRYPTED 0x00000800 /* [I] File requires key to decrypt in fs */
> > +
> > +#define STATX_ATTR_AUTOMOUNT 0x00001000 /* Dir: Automount trigger */
> > +
> > +#endif /* STATX_TYPE */
> > +#endif /* XFS_IO_STATX_H */
> > diff --git a/man/man8/xfs_io.8 b/man/man8/xfs_io.8
> > index 19e1ae4..48b4496 100644
> > --- a/man/man8/xfs_io.8
> > +++ b/man/man8/xfs_io.8
> > @@ -880,6 +880,35 @@ and the XFS_IOC_GETXATTR system call on the current file. If the
> > option is specified, the atime (last access), mtime
> > (last modify), and ctime (last change) timestamps are also displayed.
> > .TP
> > +.BR statx " [ " \-O " | " "\-m mask" " ][ \-" FDLAP " ]"
> > +Extended information from the statx syscall.
> > +.RS 1.0i
> > +.PD 0
> > +.TP 0.4i
> > +.B \-m mask
> > +Specify the field mask for the statx call (default STATX_ALL)
> > +.TP
> > +.B \-O
> > +Remove basic stats (STATX_BASIC_STATS) from default mask
> > +.TP
> > +.B \-F
> > +Force the attributes to be sync'd with the server
> > +.TP
> > +.B \-D
> > +Don't sync attributes with the server
> > +.TP
> > +.B \-L
> > +Follow symlinks (statx link target)
> > +.TP
> > +.B \-A
> > +Suppress terminal automount traversal
> > +.TP
> > +.B \-P
> > +pretty-print results similar to stat(1)
> > +.TP
> > +.RE
> > +.IP
> > +.TP
> > .B statfs
> > Selected statistics from
> > .BR statfs (2)
> >
>
> Eh, looks ok for a start.
>
> --D
>
> >
> > --
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