/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
functions to calculate the free disk space
Copyright (C) Andrew Tridgell 1998
#include "includes.h"
-
-extern int DEBUGLEVEL;
-
/****************************************************************************
-normalise for DOS usage
+ Normalise for DOS usage.
****************************************************************************/
-static void disk_norm(int *bsize,int *dfree,int *dsize)
+
+static void disk_norm(BOOL small_query, SMB_BIG_UINT *bsize,SMB_BIG_UINT *dfree,SMB_BIG_UINT *dsize)
{
/* check if the disk is beyond the max disk size */
- int maxdisksize = lp_maxdisksize();
+ SMB_BIG_UINT 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;
- }
- }
-}
-
-/* Return the number of TOSIZE-byte blocks used by
- BLOCKS FROMSIZE-byte blocks, rounding away from zero.
- TOSIZE must be positive. Return -1 if FROMSIZE is not positive. */
-static int adjust_blocks(int blocks, int fromsize, int tosize)
-{
- if (tosize <= 0 || fromsize <= 0) {
- return -1;
+ 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;
+ }
+ }
}
-
- 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 + (blocks < 0 ? -1 : 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, int *dfree, int *dsize)
-{
-#ifdef STAT_STATFS3_OSF1
-#define CONVERT_BLOCKS(B) adjust_blocks ((B), fsd.f_fsize, 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 ((B), 1024, 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 ((B), fsd.f_bsize, 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 ((B), fsd.f_fsize, 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 ((B), fsd.f_bsize, 512)
-# ifdef _CRAY
-# define f_bavail f_bfree
-# endif
-# else
-# define CONVERT_BLOCKS(B) (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 ((B), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512)
-
- struct statvfs fsd;
-
- if (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 int disk_free(char *path,int *bsize,int *dfree,int *dsize)
+
+SMB_BIG_UINT sys_disk_free(connection_struct *conn, const char *path, BOOL small_query,
+ SMB_BIG_UINT *bsize,SMB_BIG_UINT *dfree,SMB_BIG_UINT *dsize)
{
- int dfree_retval;
+ SMB_BIG_UINT dfree_retval;
+ SMB_BIG_UINT dfree_q = 0;
+ SMB_BIG_UINT bsize_q = 0;
+ SMB_BIG_UINT 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;
+ pstring syscmd;
+
+ slprintf(syscmd, sizeof(syscmd)-1, "%s %s", dfree_command, path);
+ 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;
+ file_lines_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 (SMB_BIG_UINT)-1;
+ }
+ }
+ } else {
+ if (sys_fsusage(path, dfree, dsize) != 0) {
+ DEBUG (0, ("disk_free: sys_fsusage() failed. Error was : %s\n",
+ strerror(errno) ));
+ return (SMB_BIG_UINT)-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;
}
*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.
****************************************************************************/
-int sys_disk_free(char *path,int *bsize,int *dfree,int *dsize)
+
+SMB_BIG_UINT get_dfree_info(connection_struct *conn,
+ const char *path,
+ BOOL small_query,
+ SMB_BIG_UINT *bsize,
+ SMB_BIG_UINT *dfree,
+ SMB_BIG_UINT *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;
+ SMB_BIG_UINT 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 == (SMB_BIG_UINT)-1) {
+ /* Don't cache bad data. */
+ return dfree_ret;
+ }
+
+ /* No cached info or time to refresh. */
+ if (!dfc) {
+ dfc = TALLOC_P(conn->mem_ctx, 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 / tprouty / samba.git / blobdiff