aboutsummaryrefslogtreecommitdiffstats
path: root/fs/hostfs/hostfs_user.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/hostfs/hostfs_user.c')
-rw-r--r--fs/hostfs/hostfs_user.c139
1 files changed, 81 insertions, 58 deletions
diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c
index d8d54af1b497..35c1a9f33f47 100644
--- a/fs/hostfs/hostfs_user.c
+++ b/fs/hostfs/hostfs_user.c
@@ -3,19 +3,21 @@
3 * Licensed under the GPL 3 * Licensed under the GPL
4 */ 4 */
5 5
6#include <unistd.h>
7#include <stdio.h> 6#include <stdio.h>
8#include <fcntl.h> 7#include <stddef.h>
8#include <unistd.h>
9#include <dirent.h> 9#include <dirent.h>
10#include <errno.h> 10#include <errno.h>
11#include <utime.h> 11#include <fcntl.h>
12#include <string.h> 12#include <string.h>
13#include <sys/stat.h> 13#include <sys/stat.h>
14#include <sys/time.h> 14#include <sys/time.h>
15#include <sys/types.h>
15#include <sys/vfs.h> 16#include <sys/vfs.h>
16#include "hostfs.h" 17#include "hostfs.h"
17#include "kern_util.h" 18#include "os.h"
18#include "user.h" 19#include "user.h"
20#include <utime.h>
19 21
20int stat_file(const char *path, unsigned long long *inode_out, int *mode_out, 22int stat_file(const char *path, unsigned long long *inode_out, int *mode_out,
21 int *nlink_out, int *uid_out, int *gid_out, 23 int *nlink_out, int *uid_out, int *gid_out,
@@ -25,33 +27,41 @@ int stat_file(const char *path, unsigned long long *inode_out, int *mode_out,
25{ 27{
26 struct stat64 buf; 28 struct stat64 buf;
27 29
28 if(fd >= 0) { 30 if (fd >= 0) {
29 if (fstat64(fd, &buf) < 0) 31 if (fstat64(fd, &buf) < 0)
30 return -errno; 32 return -errno;
31 } else if(lstat64(path, &buf) < 0) { 33 } else if (lstat64(path, &buf) < 0) {
32 return -errno; 34 return -errno;
33 } 35 }
34 36
35 if(inode_out != NULL) *inode_out = buf.st_ino; 37 if (inode_out != NULL)
36 if(mode_out != NULL) *mode_out = buf.st_mode; 38 *inode_out = buf.st_ino;
37 if(nlink_out != NULL) *nlink_out = buf.st_nlink; 39 if (mode_out != NULL)
38 if(uid_out != NULL) *uid_out = buf.st_uid; 40 *mode_out = buf.st_mode;
39 if(gid_out != NULL) *gid_out = buf.st_gid; 41 if (nlink_out != NULL)
40 if(size_out != NULL) *size_out = buf.st_size; 42 *nlink_out = buf.st_nlink;
41 if(atime_out != NULL) { 43 if (uid_out != NULL)
44 *uid_out = buf.st_uid;
45 if (gid_out != NULL)
46 *gid_out = buf.st_gid;
47 if (size_out != NULL)
48 *size_out = buf.st_size;
49 if (atime_out != NULL) {
42 atime_out->tv_sec = buf.st_atime; 50 atime_out->tv_sec = buf.st_atime;
43 atime_out->tv_nsec = 0; 51 atime_out->tv_nsec = 0;
44 } 52 }
45 if(mtime_out != NULL) { 53 if (mtime_out != NULL) {
46 mtime_out->tv_sec = buf.st_mtime; 54 mtime_out->tv_sec = buf.st_mtime;
47 mtime_out->tv_nsec = 0; 55 mtime_out->tv_nsec = 0;
48 } 56 }
49 if(ctime_out != NULL) { 57 if (ctime_out != NULL) {
50 ctime_out->tv_sec = buf.st_ctime; 58 ctime_out->tv_sec = buf.st_ctime;
51 ctime_out->tv_nsec = 0; 59 ctime_out->tv_nsec = 0;
52 } 60 }
53 if(blksize_out != NULL) *blksize_out = buf.st_blksize; 61 if (blksize_out != NULL)
54 if(blocks_out != NULL) *blocks_out = buf.st_blocks; 62 *blksize_out = buf.st_blksize;
63 if (blocks_out != NULL)
64 *blocks_out = buf.st_blocks;
55 return 0; 65 return 0;
56} 66}
57 67
@@ -59,21 +69,29 @@ int file_type(const char *path, int *maj, int *min)
59{ 69{
60 struct stat64 buf; 70 struct stat64 buf;
61 71
62 if(lstat64(path, &buf) < 0) 72 if (lstat64(path, &buf) < 0)
63 return -errno; 73 return -errno;
64 /*We cannot pass rdev as is because glibc and the kernel disagree 74 /*
65 *about its definition.*/ 75 * We cannot pass rdev as is because glibc and the kernel disagree
66 if(maj != NULL) 76 * about its definition.
77 */
78 if (maj != NULL)
67 *maj = major(buf.st_rdev); 79 *maj = major(buf.st_rdev);
68 if(min != NULL) 80 if (min != NULL)
69 *min = minor(buf.st_rdev); 81 *min = minor(buf.st_rdev);
70 82
71 if(S_ISDIR(buf.st_mode)) return OS_TYPE_DIR; 83 if (S_ISDIR(buf.st_mode))
72 else if(S_ISLNK(buf.st_mode)) return OS_TYPE_SYMLINK; 84 return OS_TYPE_DIR;
73 else if(S_ISCHR(buf.st_mode)) return OS_TYPE_CHARDEV; 85 else if (S_ISLNK(buf.st_mode))
74 else if(S_ISBLK(buf.st_mode)) return OS_TYPE_BLOCKDEV; 86 return OS_TYPE_SYMLINK;
75 else if(S_ISFIFO(buf.st_mode))return OS_TYPE_FIFO; 87 else if (S_ISCHR(buf.st_mode))
76 else if(S_ISSOCK(buf.st_mode))return OS_TYPE_SOCK; 88 return OS_TYPE_CHARDEV;
89 else if (S_ISBLK(buf.st_mode))
90 return OS_TYPE_BLOCKDEV;
91 else if (S_ISFIFO(buf.st_mode))
92 return OS_TYPE_FIFO;
93 else if (S_ISSOCK(buf.st_mode))
94 return OS_TYPE_SOCK;
77 else return OS_TYPE_FILE; 95 else return OS_TYPE_FILE;
78} 96}
79 97
@@ -81,10 +99,13 @@ int access_file(char *path, int r, int w, int x)
81{ 99{
82 int mode = 0; 100 int mode = 0;
83 101
84 if(r) mode = R_OK; 102 if (r)
85 if(w) mode |= W_OK; 103 mode = R_OK;
86 if(x) mode |= X_OK; 104 if (w)
87 if(access(path, mode) != 0) 105 mode |= W_OK;
106 if (x)
107 mode |= X_OK;
108 if (access(path, mode) != 0)
88 return -errno; 109 return -errno;
89 else return 0; 110 else return 0;
90} 111}
@@ -93,18 +114,18 @@ int open_file(char *path, int r, int w, int append)
93{ 114{
94 int mode = 0, fd; 115 int mode = 0, fd;
95 116
96 if(r && !w) 117 if (r && !w)
97 mode = O_RDONLY; 118 mode = O_RDONLY;
98 else if(!r && w) 119 else if (!r && w)
99 mode = O_WRONLY; 120 mode = O_WRONLY;
100 else if(r && w) 121 else if (r && w)
101 mode = O_RDWR; 122 mode = O_RDWR;
102 else panic("Impossible mode in open_file"); 123 else panic("Impossible mode in open_file");
103 124
104 if(append) 125 if (append)
105 mode |= O_APPEND; 126 mode |= O_APPEND;
106 fd = open64(path, mode); 127 fd = open64(path, mode);
107 if(fd < 0) 128 if (fd < 0)
108 return -errno; 129 return -errno;
109 else return fd; 130 else return fd;
110} 131}
@@ -115,7 +136,7 @@ void *open_dir(char *path, int *err_out)
115 136
116 dir = opendir(path); 137 dir = opendir(path);
117 *err_out = errno; 138 *err_out = errno;
118 if(dir == NULL) 139 if (dir == NULL)
119 return NULL; 140 return NULL;
120 return dir; 141 return dir;
121} 142}
@@ -128,7 +149,7 @@ char *read_dir(void *stream, unsigned long long *pos,
128 149
129 seekdir(dir, *pos); 150 seekdir(dir, *pos);
130 ent = readdir(dir); 151 ent = readdir(dir);
131 if(ent == NULL) 152 if (ent == NULL)
132 return NULL; 153 return NULL;
133 *len_out = strlen(ent->d_name); 154 *len_out = strlen(ent->d_name);
134 *ino_out = ent->d_ino; 155 *ino_out = ent->d_ino;
@@ -141,7 +162,7 @@ int read_file(int fd, unsigned long long *offset, char *buf, int len)
141 int n; 162 int n;
142 163
143 n = pread64(fd, buf, len, *offset); 164 n = pread64(fd, buf, len, *offset);
144 if(n < 0) 165 if (n < 0)
145 return -errno; 166 return -errno;
146 *offset += n; 167 *offset += n;
147 return n; 168 return n;
@@ -152,7 +173,7 @@ int write_file(int fd, unsigned long long *offset, const char *buf, int len)
152 int n; 173 int n;
153 174
154 n = pwrite64(fd, buf, len, *offset); 175 n = pwrite64(fd, buf, len, *offset);
155 if(n < 0) 176 if (n < 0)
156 return -errno; 177 return -errno;
157 *offset += n; 178 *offset += n;
158 return n; 179 return n;
@@ -163,7 +184,7 @@ int lseek_file(int fd, long long offset, int whence)
163 int ret; 184 int ret;
164 185
165 ret = lseek64(fd, offset, whence); 186 ret = lseek64(fd, offset, whence);
166 if(ret < 0) 187 if (ret < 0)
167 return -errno; 188 return -errno;
168 return 0; 189 return 0;
169} 190}
@@ -207,7 +228,7 @@ int file_create(char *name, int ur, int uw, int ux, int gr,
207 mode |= ow ? S_IWOTH : 0; 228 mode |= ow ? S_IWOTH : 0;
208 mode |= ox ? S_IXOTH : 0; 229 mode |= ox ? S_IXOTH : 0;
209 fd = open64(name, O_CREAT | O_RDWR, mode); 230 fd = open64(name, O_CREAT | O_RDWR, mode);
210 if(fd < 0) 231 if (fd < 0)
211 return -errno; 232 return -errno;
212 return fd; 233 return fd;
213} 234}
@@ -230,7 +251,7 @@ int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
230 if (fd >= 0) { 251 if (fd >= 0) {
231 if (fchown(fd, attrs->ia_uid, -1)) 252 if (fchown(fd, attrs->ia_uid, -1))
232 return -errno; 253 return -errno;
233 } else if(chown(file, attrs->ia_uid, -1)) { 254 } else if (chown(file, attrs->ia_uid, -1)) {
234 return -errno; 255 return -errno;
235 } 256 }
236 } 257 }
@@ -251,9 +272,11 @@ int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
251 } 272 }
252 } 273 }
253 274
254 /* Update accessed and/or modified time, in two parts: first set 275 /*
276 * Update accessed and/or modified time, in two parts: first set
255 * times according to the changes to perform, and then call futimes() 277 * times according to the changes to perform, and then call futimes()
256 * or utimes() to apply them. */ 278 * or utimes() to apply them.
279 */
257 ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET); 280 ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET);
258 if (attrs->ia_valid & ma) { 281 if (attrs->ia_valid & ma) {
259 err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL, 282 err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
@@ -284,11 +307,11 @@ int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
284 } 307 }
285 308
286 /* Note: ctime is not handled */ 309 /* Note: ctime is not handled */
287 if(attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)){ 310 if (attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)) {
288 err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL, 311 err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
289 &attrs->ia_atime, &attrs->ia_mtime, NULL, 312 &attrs->ia_atime, &attrs->ia_mtime, NULL,
290 NULL, NULL, fd); 313 NULL, NULL, fd);
291 if(err != 0) 314 if (err != 0)
292 return err; 315 return err;
293 } 316 }
294 return 0; 317 return 0;
@@ -299,7 +322,7 @@ int make_symlink(const char *from, const char *to)
299 int err; 322 int err;
300 323
301 err = symlink(to, from); 324 err = symlink(to, from);
302 if(err) 325 if (err)
303 return -errno; 326 return -errno;
304 return 0; 327 return 0;
305} 328}
@@ -309,7 +332,7 @@ int unlink_file(const char *file)
309 int err; 332 int err;
310 333
311 err = unlink(file); 334 err = unlink(file);
312 if(err) 335 if (err)
313 return -errno; 336 return -errno;
314 return 0; 337 return 0;
315} 338}
@@ -319,7 +342,7 @@ int do_mkdir(const char *file, int mode)
319 int err; 342 int err;
320 343
321 err = mkdir(file, mode); 344 err = mkdir(file, mode);
322 if(err) 345 if (err)
323 return -errno; 346 return -errno;
324 return 0; 347 return 0;
325} 348}
@@ -329,7 +352,7 @@ int do_rmdir(const char *file)
329 int err; 352 int err;
330 353
331 err = rmdir(file); 354 err = rmdir(file);
332 if(err) 355 if (err)
333 return -errno; 356 return -errno;
334 return 0; 357 return 0;
335} 358}
@@ -339,7 +362,7 @@ int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
339 int err; 362 int err;
340 363
341 err = mknod(file, mode, makedev(major, minor)); 364 err = mknod(file, mode, makedev(major, minor));
342 if(err) 365 if (err)
343 return -errno; 366 return -errno;
344 return 0; 367 return 0;
345} 368}
@@ -349,7 +372,7 @@ int link_file(const char *to, const char *from)
349 int err; 372 int err;
350 373
351 err = link(to, from); 374 err = link(to, from);
352 if(err) 375 if (err)
353 return -errno; 376 return -errno;
354 return 0; 377 return 0;
355} 378}
@@ -359,9 +382,9 @@ int do_readlink(char *file, char *buf, int size)
359 int n; 382 int n;
360 383
361 n = readlink(file, buf, size); 384 n = readlink(file, buf, size);
362 if(n < 0) 385 if (n < 0)
363 return -errno; 386 return -errno;
364 if(n < size) 387 if (n < size)
365 buf[n] = '\0'; 388 buf[n] = '\0';
366 return n; 389 return n;
367} 390}
@@ -371,7 +394,7 @@ int rename_file(char *from, char *to)
371 int err; 394 int err;
372 395
373 err = rename(from, to); 396 err = rename(from, to);
374 if(err < 0) 397 if (err < 0)
375 return -errno; 398 return -errno;
376 return 0; 399 return 0;
377} 400}
@@ -386,7 +409,7 @@ int do_statfs(char *root, long *bsize_out, long long *blocks_out,
386 int err; 409 int err;
387 410
388 err = statfs64(root, &buf); 411 err = statfs64(root, &buf);
389 if(err < 0) 412 if (err < 0)
390 return -errno; 413 return -errno;
391 414
392 *bsize_out = buf.f_bsize; 415 *bsize_out = buf.f_bsize;
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-02 16:04:30 -0500