/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
functions to calculate the free disk space
Copyright (C) Andrew Tridgell 1998
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
-
-
-extern int DEBUGLEVEL;
+#include "smbd/globals.h"
/****************************************************************************
-normalise for DOS usage
+ Normalise for DOS usage.
****************************************************************************/
-static void disk_norm(SMB_BIG_UINT *bsize,SMB_BIG_UINT *dfree,SMB_BIG_UINT *dsize)
+
+static void disk_norm(bool small_query, uint64_t *bsize,uint64_t *dfree,uint64_t *dsize)
{
/* check if the disk is beyond the max disk size */
- SMB_BIG_UINT maxdisksize = lp_maxdisksize();
+ uint64_t maxdisksize = lp_maxdisksize();
if (maxdisksize) {
/* convert to blocks - and don't overflow */
maxdisksize = ((maxdisksize*1024)/(*bsize))*1024;
/* the -1 should stop applications getting div by 0
errors */
}
-
- while (*dfree > WORDMAX || *dsize > WORDMAX || *bsize < 512) {
- *dfree /= 2;
- *dsize /= 2;
- *bsize *= 2;
- if (*bsize > WORDMAX) {
- *bsize = WORDMAX;
- if (*dsize > WORDMAX)
- *dsize = WORDMAX;
- if (*dfree > WORDMAX)
- *dfree = WORDMAX;
- break;
+
+ if(small_query) {
+ while (*dfree > WORDMAX || *dsize > WORDMAX || *bsize < 512) {
+ *dfree /= 2;
+ *dsize /= 2;
+ *bsize *= 2;
+ /*
+ * Force max to fit in 16 bit fields.
+ */
+ if (*bsize > (WORDMAX*512)) {
+ *bsize = (WORDMAX*512);
+ if (*dsize > WORDMAX)
+ *dsize = WORDMAX;
+ if (*dfree > WORDMAX)
+ *dfree = WORDMAX;
+ break;
+ }
}
}
}
-/* Return the number of TOSIZE-byte blocks used by
- BLOCKS FROMSIZE-byte blocks, rounding away from zero.
-*/
-static SMB_BIG_UINT adjust_blocks(SMB_BIG_UINT blocks, SMB_BIG_UINT fromsize, SMB_BIG_UINT tosize)
-{
- if (fromsize == tosize) /* e.g., from 512 to 512 */
- return blocks;
- else if (fromsize > tosize) /* e.g., from 2048 to 512 */
- return blocks * (fromsize / tosize);
- else /* e.g., from 256 to 512 */
- return (blocks + 1) / (tosize / fromsize);
-}
-
-/* this does all of the system specific guff to get the free disk space.
- It is derived from code in the GNU fileutils package, but has been
- considerably mangled for use here
-
- results are returned in *dfree and *dsize, in 512 byte units
-*/
-static int fsusage(const char *path, SMB_BIG_UINT *dfree, SMB_BIG_UINT *dsize)
-{
-#ifdef STAT_STATFS3_OSF1
-#define CONVERT_BLOCKS(B) adjust_blocks ((SMB_BIG_UINT)(B), (SMB_BIG_UINT)fsd.f_fsize, (SMB_BIG_UINT)512)
- struct statfs fsd;
-
- if (statfs (path, &fsd, sizeof (struct statfs)) != 0)
- return -1;
-#endif /* STAT_STATFS3_OSF1 */
-
-#ifdef STAT_STATFS2_FS_DATA /* Ultrix */
-#define CONVERT_BLOCKS(B) adjust_blocks ((SMB_BIG_UINT)(B), (SMB_BIG_UINT)1024, (SMB_BIG_UINT)512)
- struct fs_data fsd;
-
- if (statfs (path, &fsd) != 1)
- return -1;
-
- (*dsize) = CONVERT_BLOCKS (fsd.fd_req.btot);
- (*dfree) = CONVERT_BLOCKS (fsd.fd_req.bfreen);
-#endif /* STAT_STATFS2_FS_DATA */
-
-#ifdef STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX */
-#define CONVERT_BLOCKS(B) adjust_blocks ((SMB_BIG_UINT)(B), (SMB_BIG_UINT)fsd.f_bsize, (SMB_BIG_UINT)512)
- struct statfs fsd;
-
- if (statfs (path, &fsd) < 0)
- return -1;
-
-#ifdef STATFS_TRUNCATES_BLOCK_COUNTS
- /* In SunOS 4.1.2, 4.1.3, and 4.1.3_U1, the block counts in the
- struct statfs are truncated to 2GB. These conditions detect that
- truncation, presumably without botching the 4.1.1 case, in which
- the values are not truncated. The correct counts are stored in
- undocumented spare fields. */
- if (fsd.f_blocks == 0x1fffff && fsd.f_spare[0] > 0) {
- fsd.f_blocks = fsd.f_spare[0];
- fsd.f_bfree = fsd.f_spare[1];
- fsd.f_bavail = fsd.f_spare[2];
- }
-#endif /* STATFS_TRUNCATES_BLOCK_COUNTS */
-#endif /* STAT_STATFS2_BSIZE */
-
-
-#ifdef STAT_STATFS2_FSIZE /* 4.4BSD */
-#define CONVERT_BLOCKS(B) adjust_blocks ((SMB_BIG_UINT)(B), (SMB_BIG_UINT)fsd.f_fsize, (SMB_BIG_UINT)512)
-
- struct statfs fsd;
-
- if (statfs (path, &fsd) < 0)
- return -1;
-#endif /* STAT_STATFS2_FSIZE */
-
-#ifdef STAT_STATFS4 /* SVR3, Dynix, Irix, AIX */
-# if _AIX || defined(_CRAY)
-# define CONVERT_BLOCKS(B) adjust_blocks ((SMB_BIG_UINT)(B), (SMB_BIG_UINT)fsd.f_bsize, (SMB_BIG_UINT)512)
-# ifdef _CRAY
-# define f_bavail f_bfree
-# endif
-# else
-# define CONVERT_BLOCKS(B) ((SMB_BIG_UINT)B)
-# ifndef _SEQUENT_ /* _SEQUENT_ is DYNIX/ptx */
-# ifndef DOLPHIN /* DOLPHIN 3.8.alfa/7.18 has f_bavail */
-# define f_bavail f_bfree
-# endif
-# endif
-# endif
-
- struct statfs fsd;
-
- if (statfs (path, &fsd, sizeof fsd, 0) < 0)
- return -1;
- /* Empirically, the block counts on most SVR3 and SVR3-derived
- systems seem to always be in terms of 512-byte blocks,
- no matter what value f_bsize has. */
-
-#endif /* STAT_STATFS4 */
-
-#ifdef STAT_STATVFS /* SVR4 */
-# define CONVERT_BLOCKS(B) \
- adjust_blocks ((SMB_BIG_UINT)(B), fsd.f_frsize ? (SMB_BIG_UINT)fsd.f_frsize : (SMB_BIG_UINT)fsd.f_bsize, (SMB_BIG_UINT)512)
-
- SMB_STRUCT_STATVFS fsd;
-
- if (sys_statvfs (path, &fsd) < 0)
- return -1;
- /* f_frsize isn't guaranteed to be supported. */
-
-#endif /* STAT_STATVFS */
-
-#ifndef CONVERT_BLOCKS
- /* we don't have any dfree code! */
- return -1;
-#else
-#if !defined(STAT_STATFS2_FS_DATA)
- /* !Ultrix */
- (*dsize) = CONVERT_BLOCKS (fsd.f_blocks);
- (*dfree) = CONVERT_BLOCKS (fsd.f_bavail);
-#endif /* not STAT_STATFS2_FS_DATA */
-#endif
-
- return 0;
-}
/****************************************************************************
- return number of 1K blocks available on a path and total number
+ Return number of 1K blocks available on a path and total number.
****************************************************************************/
-static SMB_BIG_UINT disk_free(char *path,SMB_BIG_UINT *bsize,SMB_BIG_UINT *dfree,SMB_BIG_UINT *dsize)
+
+uint64_t sys_disk_free(connection_struct *conn, const char *path, bool small_query,
+ uint64_t *bsize,uint64_t *dfree,uint64_t *dsize)
{
- int dfree_retval;
+ uint64_t dfree_retval;
+ uint64_t dfree_q = 0;
+ uint64_t bsize_q = 0;
+ uint64_t dsize_q = 0;
+ const char *dfree_command;
(*dfree) = (*dsize) = 0;
(*bsize) = 512;
- fsusage(path, dfree, dsize);
+ /*
+ * If external disk calculation specified, use it.
+ */
+
+ dfree_command = lp_dfree_command(SNUM(conn));
+ if (dfree_command && *dfree_command) {
+ const char *p;
+ char **lines = NULL;
+ char *syscmd = NULL;
+ syscmd = talloc_asprintf(talloc_tos(),
+ "%s %s",
+ dfree_command,
+ path);
+
+ if (!syscmd) {
+ return (uint64_t)-1;
+ }
+
+ DEBUG (3, ("disk_free: Running command %s\n", syscmd));
+
+ lines = file_lines_pload(syscmd, NULL);
+ if (lines) {
+ char *line = lines[0];
+
+ DEBUG (3, ("Read input from dfree, \"%s\"\n", line));
+
+ *dsize = STR_TO_SMB_BIG_UINT(line, &p);
+ while (p && *p && isspace(*p))
+ p++;
+ if (p && *p)
+ *dfree = STR_TO_SMB_BIG_UINT(p, &p);
+ while (p && *p && isspace(*p))
+ p++;
+ if (p && *p)
+ *bsize = STR_TO_SMB_BIG_UINT(p, NULL);
+ else
+ *bsize = 1024;
+ TALLOC_FREE(lines);
+ DEBUG (3, ("Parsed output of dfree, dsize=%u, dfree=%u, bsize=%u\n",
+ (unsigned int)*dsize, (unsigned int)*dfree, (unsigned int)*bsize));
+
+ if (!*dsize)
+ *dsize = 2048;
+ if (!*dfree)
+ *dfree = 1024;
+ } else {
+ DEBUG (0, ("disk_free: sys_popen() failed for command %s. Error was : %s\n",
+ syscmd, strerror(errno) ));
+ if (sys_fsusage(path, dfree, dsize) != 0) {
+ DEBUG (0, ("disk_free: sys_fsusage() failed. Error was : %s\n",
+ strerror(errno) ));
+ return (uint64_t)-1;
+ }
+ }
+ } else {
+ if (sys_fsusage(path, dfree, dsize) != 0) {
+ DEBUG (0, ("disk_free: sys_fsusage() failed. Error was : %s\n",
+ strerror(errno) ));
+ return (uint64_t)-1;
+ }
+ }
+
+ if (disk_quotas(path, &bsize_q, &dfree_q, &dsize_q)) {
+ (*bsize) = bsize_q;
+ (*dfree) = MIN(*dfree,dfree_q);
+ (*dsize) = MIN(*dsize,dsize_q);
+ }
+
+ /* FIXME : Any reason for this assumption ? */
if (*bsize < 256) {
+ DEBUG(5,("disk_free:Warning: bsize == %d < 256 . Changing to assumed correct bsize = 512\n",(int)*bsize));
*bsize = 512;
}
if ((*dsize)<1) {
- static int done;
- if (!done) {
+ if (!dfree_broken) {
DEBUG(0,("WARNING: dfree is broken on this system\n"));
- done=1;
+ dfree_broken=true;
}
*dsize = 20*1024*1024/(*bsize);
*dfree = MAX(1,*dfree);
}
- disk_norm(bsize,dfree,dsize);
+ disk_norm(small_query,bsize,dfree,dsize);
if ((*bsize) < 1024) {
dfree_retval = (*dfree)/(1024/(*bsize));
return(dfree_retval);
}
-
/****************************************************************************
-wrap it to get filenames right
+ Potentially returned cached dfree info.
****************************************************************************/
-SMB_BIG_UINT sys_disk_free(char *path,SMB_BIG_UINT *bsize,SMB_BIG_UINT *dfree,SMB_BIG_UINT *dsize)
+
+uint64_t get_dfree_info(connection_struct *conn,
+ const char *path,
+ bool small_query,
+ uint64_t *bsize,
+ uint64_t *dfree,
+ uint64_t *dsize)
{
- return(disk_free(dos_to_unix(path,False),bsize,dfree,dsize));
+ int dfree_cache_time = lp_dfree_cache_time(SNUM(conn));
+ struct dfree_cached_info *dfc = conn->dfree_info;
+ uint64_t dfree_ret;
+
+ if (!dfree_cache_time) {
+ return SMB_VFS_DISK_FREE(conn,path,small_query,bsize,dfree,dsize);
+ }
+
+ if (dfc && (conn->lastused - dfc->last_dfree_time < dfree_cache_time)) {
+ /* Return cached info. */
+ *bsize = dfc->bsize;
+ *dfree = dfc->dfree;
+ *dsize = dfc->dsize;
+ return dfc->dfree_ret;
+ }
+
+ dfree_ret = SMB_VFS_DISK_FREE(conn,path,small_query,bsize,dfree,dsize);
+
+ if (dfree_ret == (uint64_t)-1) {
+ /* Don't cache bad data. */
+ return dfree_ret;
+ }
+
+ /* No cached info or time to refresh. */
+ if (!dfc) {
+ dfc = TALLOC_P(conn, struct dfree_cached_info);
+ if (!dfc) {
+ return dfree_ret;
+ }
+ conn->dfree_info = dfc;
+ }
+
+ dfc->bsize = *bsize;
+ dfc->dfree = *dfree;
+ dfc->dsize = *dsize;
+ dfc->dfree_ret = dfree_ret;
+ dfc->last_dfree_time = conn->lastused;
+
+ return dfree_ret;
}
git.samba.org / metze / samba / wip.git / blobdiff