GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2011 Varnish Software AS
 * All rights reserved.
 *
 * Author: Dag-Erling Smørgrav <des@des.no>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"

#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <sys/statvfs.h>
#if defined(__linux__) && defined(HAVE_FALLOCATE)
#  include <linux/magic.h>
#  include <sys/vfs.h>
#endif

#include "vdef.h"

#include "miniobj.h"
#include "vas.h"
#include "vsb.h"
#include "vfil.h"
#include "vqueue.h"

void
VFIL_null_fd(int target)
{
        int fd;

        assert(target >= 0);
        fd = open("/dev/null", O_RDWR);
        assert(fd >= 0);
        assert(dup2(fd, target) == target);
        closefd(&fd);
}

static char *
vfil_readfd(int fd, ssize_t *sz)
{
        struct stat st;
        char *f;
        int i;

        AZ(fstat(fd, &st));
        if (!S_ISREG(st.st_mode))
                return (NULL);
        f = malloc(st.st_size + 1);
        assert(f != NULL);
        i = read(fd, f, st.st_size + 1);
        if (i != st.st_size) {
                free(f);
                return (NULL);
        }
        f[i] = '\0';
        if (sz != NULL)
                *sz = st.st_size;
        return (f);
}

static int
vfil_writefd(int fd, const char *buf, size_t sz)
{
        ssize_t len;

        while (sz > 0) {
                len = write(fd, buf, sz);
                if (len < 0)
                        return (len);
                if (len == 0)
                        break;
                buf += len;
                sz -= len;
        }

        return (sz == 0 ? 0 : -1);
}

static int
vfil_openfile(const char *pfx, const char *fn, int flags, int mode)
{
        char fnb[PATH_MAX + 1];

        if (fn[0] != '/' && pfx != NULL) {
                /* XXX: graceful length check */
                bprintf(fnb, "/%s/%s", pfx, fn);
                fn = fnb;
        }

        if (flags & O_CREAT)
                return (open(fn, flags, mode));
        else
                return (open(fn, flags));
}

char *
VFIL_readfile(const char *pfx, const char *fn, ssize_t *sz)
{
        int fd, err;
        char *r;

        fd = vfil_openfile(pfx, fn, O_RDONLY, 0);
        if (fd < 0)
                return (NULL);
        r = vfil_readfd(fd, sz);
        err = errno;
        closefd(&fd);
        errno = err;
        return (r);
}

int
VFIL_writefile(const char *pfx, const char *fn, const char *buf, size_t sz)
{
        int fd, err;
        int r;

        fd = vfil_openfile(pfx, fn, O_WRONLY|O_CREAT|O_TRUNC, 0660);
        if (fd < 0)
                return (fd);
        r = vfil_writefd(fd, buf, sz);
        err = errno;
        closefd(&fd);
        errno = err;
        return (r);
}

int
VFIL_nonblocking(int fd)
{
        int i;

        i = fcntl(fd, F_GETFL);
        assert(i != -1);
        i |= O_NONBLOCK;
        i = fcntl(fd, F_SETFL, i);
        assert(i != -1);
        return (i);
}

/*
 * Get file system information from an fd
 * Returns block size, total size and space available in the passed pointers
 * Returns 0 on success, or -1 on failure with errno set
 */
int
VFIL_fsinfo(int fd, unsigned *pbs, uintmax_t *psize, uintmax_t *pspace)
{
        unsigned bs;
        uintmax_t size, space;
        struct statvfs fsst;

        if (fstatvfs(fd, &fsst))
                return (-1);
        bs = fsst.f_frsize;
        size = fsst.f_blocks * fsst.f_frsize;
        space = fsst.f_bavail * fsst.f_frsize;

        if (pbs)
                *pbs = bs;
        if (psize)
                *psize = size;
        if (pspace)
                *pspace = space;
        return (0);
}

/*
 * Make sure that the file system can accommodate the file of the given
 * size. Will use fallocate if available. If fallocate is not available
 * and insist is true, it will write size zero bytes.
 *
 * Returns 0 on success, -1 on failure with errno set.
 */

int
VFIL_allocate(int fd, uintmax_t size, int insist)
{
        struct stat st;
        uintmax_t fsspace;
        size_t l;
        ssize_t l2, l3;
        char *buf;
        ssize_t bufsiz;
        int retval = 0;

        if (ftruncate(fd, size))
                return (-1);
        if (fstat(fd, &st))
                return (-1);
        if (VFIL_fsinfo(fd, NULL, NULL, &fsspace))
                return (-1);
        if ((st.st_blocks * 512) + fsspace < size) {
                /* Sum of currently allocated blocks and available space
                   is less than requested size */
                errno = ENOSPC;
                return (-1);
        }
#if defined(__linux__) && defined(HAVE_FALLOCATE)
        {
                /* fallocate will for some filesystems (e.g. xfs) not take
                   the already allocated blocks of the file into
                   account. This will cause fallocate to report ENOSPC
                   when called on an existing fully allocated file unless
                   the filesystem has enough free space to accommodate the
                   complete new file size. Because of this we enable
                   fallocate only on filesystems that are known to work as
                   we expect. */
                struct statfs stfs;
                if (!fstatfs(fd, &stfs) && stfs.f_type == EXT4_SUPER_MAGIC) {
                        if (!fallocate(fd, 0, 0, size))
                                return (0);
                        if (errno == ENOSPC)
                                return (-1);
                }
        }
#endif
        if (!insist)
                return (0);

        /* Write size zero bytes to make sure the entire file is allocated
           in the file system */
        if (size > 65536)
                bufsiz = 64 * 1024;
        else
                bufsiz = size;
        buf = calloc(1, bufsiz);
        AN(buf);
        assert(lseek(fd, 0, SEEK_SET) == 0);
        for (l = 0; l < size; l += l2) {
                l2 = bufsiz;
                if (l + l2 > size)
                        l2 = size - l;
                l3 = write(fd, buf, l2);
                if (l3 != l2) {
                        retval = -1;
                        break;
                }
        }
        assert(lseek(fd, 0, SEEK_SET) == 0);
        free(buf);
        return (retval);
}

struct vfil_dir {
        unsigned                magic;
#define VFIL_DIR_MAGIC          0x3e214967
        char                    *dir;
        VTAILQ_ENTRY(vfil_dir)  list;
};

struct vfil_path {
        unsigned                magic;
#define VFIL_PATH_MAGIC         0x92dbcc31
        char                    *str;
        VTAILQ_HEAD(,vfil_dir)  paths;
};

/*
 * Path searching functions
 */

void
VFIL_setpath(struct vfil_path **pp, const char *path)
{
        struct vfil_path *vp;
        struct vfil_dir *vd;
        char *p, *q;

        AN(pp);
        AN(path);

        vp = *pp;
        if (vp == NULL) {
                ALLOC_OBJ(vp, VFIL_PATH_MAGIC);
                AN(vp);
                VTAILQ_INIT(&vp->paths);
                *pp = vp;
        }
        REPLACE(vp->str, path);
        while (!VTAILQ_EMPTY(&vp->paths)) {
                vd = VTAILQ_FIRST(&vp->paths);
                CHECK_OBJ_NOTNULL(vd, VFIL_DIR_MAGIC);
                VTAILQ_REMOVE(&vp->paths, vd, list);
                FREE_OBJ(vd);
        }
        for (p = vp->str; p != NULL; p = q) {
                q = strchr(p, ':');
                if (q != NULL)
                        *q++ = '\0';
                ALLOC_OBJ(vd, VFIL_DIR_MAGIC);
                AN(vd);
                vd->dir = p;
                VTAILQ_INSERT_TAIL(&vp->paths, vd, list);
        }
}

static int
vfil_path_openfile(void *priv, const char *fn)
{
        char *p, **pp;

        AN(priv);
        AN(fn);
        p = VFIL_readfile(NULL, fn, NULL);
        if (p == NULL)
                return (1);

        pp = priv;
        *pp = p;
        return (0);
}

int
VFIL_searchpath(const struct vfil_path *vp, vfil_path_func_f *func, void *priv,
    const char *fni, char **fno)
{
        struct vsb *vsb;
        struct vfil_dir *vd;
        int i, e;

        CHECK_OBJ_NOTNULL(vp, VFIL_PATH_MAGIC);
        AN(fno);
        *fno = NULL;

        if (func == NULL) {
                func = vfil_path_openfile;
                AN(priv);
        }

        if (*fni == '/') {
                i = func(priv, fni);
                if (i <= 0)
                        REPLACE(*fno, fni);
                return (i);
        }
        vsb = VSB_new_auto();
        AN(vsb);
        VTAILQ_FOREACH(vd, &vp->paths, list) {
                VSB_clear(vsb);
                VSB_printf(vsb, "%s/%s", vd->dir, fni);
                AZ(VSB_finish(vsb));
                if (access(VSB_data(vsb), F_OK))
                        continue;
                i = func(priv, VSB_data(vsb));
                if (i <= 0) {
                        e = errno;
                        *fno = strdup(VSB_data(vsb));
                        AN(*fno);
                        VSB_destroy(&vsb);
                        errno = e;
                        return (i);
                }
        }
        VSB_destroy(&vsb);
        return (-1);
}

		vinyl-cache/lib/libvinyl/vfil.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2011 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Dag-Erling Smørgrav <des@des.no>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*/
30
31		#include "config.h"
32
33		#include <time.h>
34		#include <sys/types.h>
35		#include <sys/stat.h>
36		#include <fcntl.h>
37		#include <limits.h>
38		#include <stdio.h>
39		#include <stdlib.h>
40		#include <unistd.h>
41		#include <stdint.h>
42		#include <string.h>
43		#include <sys/statvfs.h>
44		#if defined(__linux__) && defined(HAVE_FALLOCATE)
45		# include <linux/magic.h>
46		# include <sys/vfs.h>
47		#endif
48
49		#include "vdef.h"
50
51		#include "miniobj.h"
52		#include "vas.h"
53		#include "vsb.h"
54		#include "vfil.h"
55		#include "vqueue.h"
56
57		void
58	60660	VFIL_null_fd(int target)
59		{
60		int fd;
61
62	60660	assert(target >= 0);
63	60660	fd = open("/dev/null", O_RDWR);
64	60660	assert(fd >= 0);
65	60660	assert(dup2(fd, target) == target);
66	60660	closefd(&fd);
67	60660	}
68
69		static char *
70	30824	vfil_readfd(int fd, ssize_t *sz)
71		{
72		struct stat st;
73		char *f;
74		int i;
75
76	30824	AZ(fstat(fd, &st));
77	30824	if (!S_ISREG(st.st_mode))
78	0	return (NULL);
79	30824	f = malloc(st.st_size + 1);
80	30824	assert(f != NULL);
81	30824	i = read(fd, f, st.st_size + 1);
82	30824	if (i != st.st_size) {
83	0	free(f);
84	0	return (NULL);
85		}
86	30824	f[i] = '\0';
87	30824	if (sz != NULL)
88	56	*sz = st.st_size;
89	30824	return (f);
90	30824	}
91
92		static int
93	72	vfil_writefd(int fd, const char *buf, size_t sz)
94		{
95		ssize_t len;
96
97	144	while (sz > 0) {
98	72	len = write(fd, buf, sz);
99	72	if (len < 0)
100	0	return (len);
101	72	if (len == 0)
102	0	break;
103	72	buf += len;
104	72	sz -= len;
105		}
106
107	72	return (sz == 0 ? 0 : -1);
108	72	}
109
110		static int
111	30928	vfil_openfile(const char pfx, const char fn, int flags, int mode)
112		{
113		char fnb[PATH_MAX + 1];
114
115	30928	if (fn[0] != '/' && pfx != NULL) {
116		/* XXX: graceful length check */
117	0	bprintf(fnb, "/%s/%s", pfx, fn);
118	0	fn = fnb;
119	0	}
120
121	30928	if (flags & O_CREAT)
122	72	return (open(fn, flags, mode));
123		else
124	30856	return (open(fn, flags));
125	30928	}
126
127		char *
128	30856	VFIL_readfile(const char pfx, const char fn, ssize_t *sz)
129		{
130		int fd, err;
131		char *r;
132
133	30856	fd = vfil_openfile(pfx, fn, O_RDONLY, 0);
134	30856	if (fd < 0)
135	32	return (NULL);
136	30824	r = vfil_readfd(fd, sz);
137	30824	err = errno;
138	30824	closefd(&fd);
139	30824	errno = err;
140	30824	return (r);
141	30856	}
142
143		int
144	72	VFIL_writefile(const char pfx, const char fn, const char *buf, size_t sz)
145		{
146		int fd, err;
147		int r;
148
149	72	fd = vfil_openfile(pfx, fn, O_WRONLY\|O_CREAT\|O_TRUNC, 0660);
150	72	if (fd < 0)
151	0	return (fd);
152	72	r = vfil_writefd(fd, buf, sz);
153	72	err = errno;
154	72	closefd(&fd);
155	72	errno = err;
156	72	return (r);
157	72	}
158
159		int
160	4028	VFIL_nonblocking(int fd)
161		{
162		int i;
163
164	4028	i = fcntl(fd, F_GETFL);
165	4028	assert(i != -1);
166	4028	i \|= O_NONBLOCK;
167	4028	i = fcntl(fd, F_SETFL, i);
168	4028	assert(i != -1);
169	4028	return (i);
170		}
171
172		/*
173		* Get file system information from an fd
174		* Returns block size, total size and space available in the passed pointers
175		* Returns 0 on success, or -1 on failure with errno set
176		*/
177		int
178	209274	VFIL_fsinfo(int fd, unsigned pbs, uintmax_t psize, uintmax_t *pspace)
179		{
180		unsigned bs;
181		uintmax_t size, space;
182		struct statvfs fsst;
183
184	209274	if (fstatvfs(fd, &fsst))
185	0	return (-1);
186	209274	bs = fsst.f_frsize;
187	209274	size = fsst.f_blocks * fsst.f_frsize;
188	209274	space = fsst.f_bavail * fsst.f_frsize;
189
190	209274	if (pbs)
191	176	*pbs = bs;
192	209274	if (psize)
193	176	*psize = size;
194	209274	if (pspace)
195	209098	*pspace = space;
196	209274	return (0);
197	209274	}
198
199		/*
200		* Make sure that the file system can accommodate the file of the given
201		* size. Will use fallocate if available. If fallocate is not available
202		* and insist is true, it will write size zero bytes.
203		*
204		* Returns 0 on success, -1 on failure with errno set.
205		*/
206
207		int
208	209098	VFIL_allocate(int fd, uintmax_t size, int insist)
209		{
210		struct stat st;
211		uintmax_t fsspace;
212		size_t l;
213		ssize_t l2, l3;
214		char *buf;
215		ssize_t bufsiz;
216	209098	int retval = 0;
217
218	209098	if (ftruncate(fd, size))
219	0	return (-1);
220	209098	if (fstat(fd, &st))
221	0	return (-1);
222	209098	if (VFIL_fsinfo(fd, NULL, NULL, &fsspace))
223	0	return (-1);
224	209098	if ((st.st_blocks * 512) + fsspace < size) {
225		/* Sum of currently allocated blocks and available space
226		is less than requested size */
227	0	errno = ENOSPC;
228	0	return (-1);
229		}
230		#if defined(__linux__) && defined(HAVE_FALLOCATE)
231		{
232		/* fallocate will for some filesystems (e.g. xfs) not take
233		the already allocated blocks of the file into
234		account. This will cause fallocate to report ENOSPC
235		when called on an existing fully allocated file unless
236		the filesystem has enough free space to accommodate the
237		complete new file size. Because of this we enable
238		fallocate only on filesystems that are known to work as
239		we expect. */
240		struct statfs stfs;
241		if (!fstatfs(fd, &stfs) && stfs.f_type == EXT4_SUPER_MAGIC) {
242		if (!fallocate(fd, 0, 0, size))
243		return (0);
244		if (errno == ENOSPC)
245		return (-1);
246		}
247		}
248		#endif
249	209098	if (!insist)
250	20	return (0);
251
252		/* Write size zero bytes to make sure the entire file is allocated
253		in the file system */
254	209078	if (size > 65536)
255	3916	bufsiz = 64 * 1024;
256		else
257	205162	bufsiz = size;
258	209078	buf = calloc(1, bufsiz);
259	209078	AN(buf);
260	209078	assert(lseek(fd, 0, SEEK_SET) == 0);
261	549536	for (l = 0; l < size; l += l2) {
262	340458	l2 = bufsiz;
263	340458	if (l + l2 > size)
264	0	l2 = size - l;
265	340458	l3 = write(fd, buf, l2);
266	340458	if (l3 != l2) {
267	0	retval = -1;
268	0	break;
269		}
270	340458	}
271	209078	assert(lseek(fd, 0, SEEK_SET) == 0);
272	209078	free(buf);
273	209078	return (retval);
274	209098	}
275
276		struct vfil_dir {
277		unsigned magic;
278		#define VFIL_DIR_MAGIC 0x3e214967
279		char *dir;
280		VTAILQ_ENTRY(vfil_dir) list;
281		};
282
283		struct vfil_path {
284		unsigned magic;
285		#define VFIL_PATH_MAGIC 0x92dbcc31
286		char *str;
287		VTAILQ_HEAD(,vfil_dir) paths;
288		};
289
290		/*
291		* Path searching functions
292		*/
293
294		void
295	12856	VFIL_setpath(struct vfil_path *pp, const char path)
296		{
297		struct vfil_path *vp;
298		struct vfil_dir *vd;
299		char p, q;
300
301	12856	AN(pp);
302	12856	AN(path);
303
304	12856	vp = *pp;
305	12856	if (vp == NULL) {
306	12840	ALLOC_OBJ(vp, VFIL_PATH_MAGIC);
307	12840	AN(vp);
308	12840	VTAILQ_INIT(&vp->paths);
309	12840	*pp = vp;
310	12840	}
311	12856	REPLACE(vp->str, path);
312	12888	while (!VTAILQ_EMPTY(&vp->paths)) {
313	32	vd = VTAILQ_FIRST(&vp->paths);
314	32	CHECK_OBJ_NOTNULL(vd, VFIL_DIR_MAGIC);
315	32	VTAILQ_REMOVE(&vp->paths, vd, list);
316	32	FREE_OBJ(vd);
317		}
318	38324	for (p = vp->str; p != NULL; p = q) {
319	25468	q = strchr(p, ':');
320	25468	if (q != NULL)
321	12612	*q++ = '\0';
322	25468	ALLOC_OBJ(vd, VFIL_DIR_MAGIC);
323	25468	AN(vd);
324	25468	vd->dir = p;
325	25468	VTAILQ_INSERT_TAIL(&vp->paths, vd, list);
326	25468	}
327	12856	}
328
329		static int
330	252	vfil_path_openfile(void priv, const char fn)
331		{
332		char p, *pp;
333
334	252	AN(priv);
335	252	AN(fn);
336	252	p = VFIL_readfile(NULL, fn, NULL);
337	252	if (p == NULL)
338	8	return (1);
339
340	244	pp = priv;
341	244	*pp = p;
342	244	return (0);
343	252	}
344
345		int
346	2720	VFIL_searchpath(const struct vfil_path vp, vfil_path_func_f func, void *priv,
347		const char fni, char *fno)
348		{
349		struct vsb *vsb;
350		struct vfil_dir *vd;
351		int i, e;
352
353	2720	CHECK_OBJ_NOTNULL(vp, VFIL_PATH_MAGIC);
354	2720	AN(fno);
355	2720	*fno = NULL;
356
357	2720	if (func == NULL) {
358	260	func = vfil_path_openfile;
359	260	AN(priv);
360	260	}
361
362	2720	if (*fni == '/') {
363	212	i = func(priv, fni);
364	212	if (i <= 0)
365	204	REPLACE(*fno, fni);
366	212	return (i);
367		}
368	2508	vsb = VSB_new_auto();
369	2508	AN(vsb);
370	2536	VTAILQ_FOREACH(vd, &vp->paths, list) {
371	2520	VSB_clear(vsb);
372	2520	VSB_printf(vsb, "%s/%s", vd->dir, fni);
373	2520	AZ(VSB_finish(vsb));
374	2520	if (access(VSB_data(vsb), F_OK))
375	28	continue;
376	2492	i = func(priv, VSB_data(vsb));
377	2492	if (i <= 0) {
378	2492	e = errno;
379	2492	*fno = strdup(VSB_data(vsb));
380	2492	AN(*fno);
381	2492	VSB_destroy(&vsb);
382	2492	errno = e;
383	2492	return (i);
384		}
385	0	}
386	16	VSB_destroy(&vsb);
387	16	return (-1);
388	2720	}