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/*
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* Virtio 9p backend
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "hw/virtio.h" |
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#include "hw/pc.h" |
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#include "qemu_socket.h" |
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#include "hw/virtio-pci.h" |
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#include "virtio-9p.h" |
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#include "fsdev/qemu-fsdev.h" |
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#include "virtio-9p-debug.h" |
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#include "virtio-9p-xattr.h" |
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#include "virtio-9p-coth.h" |
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int debug_9p_pdu;
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int open_fd_hw;
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int total_open_fd;
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static int open_fd_rc; |
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enum {
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Oread = 0x00,
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Owrite = 0x01,
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Ordwr = 0x02,
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Oexec = 0x03,
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Oexcl = 0x04,
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Otrunc = 0x10,
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Orexec = 0x20,
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Orclose = 0x40,
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Oappend = 0x80,
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}; |
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static int omode_to_uflags(int8_t mode) |
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{ |
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int ret = 0; |
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|
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switch (mode & 3) { |
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case Oread:
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ret = O_RDONLY; |
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break;
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case Ordwr:
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ret = O_RDWR; |
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break;
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case Owrite:
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ret = O_WRONLY; |
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break;
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case Oexec:
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ret = O_RDONLY; |
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break;
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} |
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if (mode & Otrunc) {
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ret |= O_TRUNC; |
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} |
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if (mode & Oappend) {
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ret |= O_APPEND; |
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} |
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if (mode & Oexcl) {
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ret |= O_EXCL; |
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} |
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return ret;
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} |
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void cred_init(FsCred *credp)
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{ |
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credp->fc_uid = -1;
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credp->fc_gid = -1;
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credp->fc_mode = -1;
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credp->fc_rdev = -1;
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} |
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static void v9fs_string_init(V9fsString *str) |
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{ |
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str->data = NULL;
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str->size = 0;
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} |
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|
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static void v9fs_string_free(V9fsString *str) |
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{ |
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g_free(str->data); |
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str->data = NULL;
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str->size = 0;
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} |
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static void v9fs_string_null(V9fsString *str) |
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{ |
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v9fs_string_free(str); |
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} |
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static int number_to_string(void *arg, char type) |
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{ |
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unsigned int ret = 0; |
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switch (type) {
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case 'u': { |
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unsigned int num = *(unsigned int *)arg; |
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do {
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ret++; |
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num = num/10;
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} while (num);
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break;
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} |
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case 'U': { |
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unsigned long num = *(unsigned long *)arg; |
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do {
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ret++; |
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num = num/10;
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} while (num);
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break;
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} |
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default:
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printf("Number_to_string: Unknown number format\n");
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return -1; |
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} |
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return ret;
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} |
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|
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static int GCC_FMT_ATTR(2, 0) |
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v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) |
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{ |
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va_list ap2; |
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char *iter = (char *)fmt; |
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int len = 0; |
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int nr_args = 0; |
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char *arg_char_ptr;
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unsigned int arg_uint; |
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unsigned long arg_ulong; |
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/* Find the number of %'s that denotes an argument */
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for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
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nr_args++; |
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iter++; |
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} |
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|
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len = strlen(fmt) - 2*nr_args;
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if (!nr_args) {
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goto alloc_print;
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} |
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va_copy(ap2, ap); |
155 |
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iter = (char *)fmt;
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|
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/* Now parse the format string */
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for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
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iter++; |
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switch (*iter) {
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case 'u': |
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arg_uint = va_arg(ap2, unsigned int); |
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len += number_to_string((void *)&arg_uint, 'u'); |
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break;
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case 'l': |
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if (*++iter == 'u') { |
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arg_ulong = va_arg(ap2, unsigned long); |
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len += number_to_string((void *)&arg_ulong, 'U'); |
170 |
} else {
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return -1; |
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} |
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break;
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174 |
case 's': |
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arg_char_ptr = va_arg(ap2, char *);
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len += strlen(arg_char_ptr); |
177 |
break;
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case 'c': |
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len += 1;
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break;
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default:
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fprintf(stderr, |
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"v9fs_string_alloc_printf:Incorrect format %c", *iter);
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return -1; |
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} |
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iter++; |
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} |
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alloc_print:
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*strp = g_malloc((len + 1) * sizeof(**strp)); |
191 |
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return vsprintf(*strp, fmt, ap);
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} |
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static void GCC_FMT_ATTR(2, 3) |
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v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) |
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{ |
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va_list ap; |
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int err;
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v9fs_string_free(str); |
202 |
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va_start(ap, fmt); |
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err = v9fs_string_alloc_printf(&str->data, fmt, ap); |
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BUG_ON(err == -1);
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va_end(ap); |
207 |
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str->size = err; |
209 |
} |
210 |
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static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) |
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{ |
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v9fs_string_free(lhs); |
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v9fs_string_sprintf(lhs, "%s", rhs->data);
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} |
216 |
|
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/*
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* Return TRUE if s1 is an ancestor of s2.
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*
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* E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
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* As a special case, We treat s1 as ancestor of s2 if they are same!
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*/
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static int v9fs_path_is_ancestor(V9fsString *s1, V9fsString *s2) |
224 |
{ |
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if (!strncmp(s1->data, s2->data, s1->size)) {
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if (s2->data[s1->size] == '\0' || s2->data[s1->size] == '/') { |
227 |
return 1; |
228 |
} |
229 |
} |
230 |
return 0; |
231 |
} |
232 |
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static size_t v9fs_string_size(V9fsString *str)
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{ |
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return str->size;
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} |
237 |
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/*
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* returns 0 if fid got re-opened, 1 if not, < 0 on error */
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static int v9fs_reopen_fid(V9fsState *s, V9fsFidState *f) |
241 |
{ |
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int err = 1; |
243 |
if (f->fid_type == P9_FID_FILE) {
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244 |
if (f->fs.fd == -1) { |
245 |
do {
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err = v9fs_co_open(s, f, f->open_flags); |
247 |
} while (err == -EINTR);
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} |
249 |
} else if (f->fid_type == P9_FID_DIR) { |
250 |
if (f->fs.dir == NULL) { |
251 |
do {
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err = v9fs_co_opendir(s, f); |
253 |
} while (err == -EINTR);
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} |
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} |
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return err;
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} |
258 |
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static V9fsFidState *get_fid(V9fsState *s, int32_t fid)
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{ |
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int err;
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V9fsFidState *f; |
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for (f = s->fid_list; f; f = f->next) {
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BUG_ON(f->clunked); |
266 |
if (f->fid == fid) {
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/*
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* Update the fid ref upfront so that
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* we don't get reclaimed when we yield
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* in open later.
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*/
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f->ref++; |
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/*
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* check whether we need to reopen the
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* file. We might have closed the fd
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* while trying to free up some file
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* descriptors.
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*/
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err = v9fs_reopen_fid(s, f); |
280 |
if (err < 0) { |
281 |
f->ref--; |
282 |
return NULL; |
283 |
} |
284 |
/*
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285 |
* Mark the fid as referenced so that the LRU
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* reclaim won't close the file descriptor
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*/
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f->flags |= FID_REFERENCED; |
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return f;
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} |
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} |
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return NULL; |
293 |
} |
294 |
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static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
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{ |
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V9fsFidState *f; |
298 |
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for (f = s->fid_list; f; f = f->next) {
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/* If fid is already there return NULL */
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BUG_ON(f->clunked); |
302 |
if (f->fid == fid) {
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return NULL; |
304 |
} |
305 |
} |
306 |
f = g_malloc0(sizeof(V9fsFidState));
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f->fid = fid; |
308 |
f->fid_type = P9_FID_NONE; |
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f->ref = 1;
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/*
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* Mark the fid as referenced so that the LRU
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* reclaim won't close the file descriptor
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*/
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f->flags |= FID_REFERENCED; |
315 |
f->next = s->fid_list; |
316 |
s->fid_list = f; |
317 |
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318 |
return f;
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} |
320 |
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321 |
static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
322 |
{ |
323 |
int retval = 0; |
324 |
|
325 |
if (fidp->fs.xattr.copied_len == -1) { |
326 |
/* getxattr/listxattr fid */
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327 |
goto free_value;
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328 |
} |
329 |
/*
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330 |
* if this is fid for setxattr. clunk should
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331 |
* result in setxattr localcall
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332 |
*/
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333 |
if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
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334 |
/* clunk after partial write */
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335 |
retval = -EINVAL; |
336 |
goto free_out;
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337 |
} |
338 |
if (fidp->fs.xattr.len) {
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339 |
retval = v9fs_co_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, |
340 |
fidp->fs.xattr.value, |
341 |
fidp->fs.xattr.len, |
342 |
fidp->fs.xattr.flags); |
343 |
} else {
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344 |
retval = v9fs_co_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name); |
345 |
} |
346 |
free_out:
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347 |
v9fs_string_free(&fidp->fs.xattr.name); |
348 |
free_value:
|
349 |
if (fidp->fs.xattr.value) {
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350 |
g_free(fidp->fs.xattr.value); |
351 |
} |
352 |
return retval;
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353 |
} |
354 |
|
355 |
static int free_fid(V9fsState *s, V9fsFidState *fidp) |
356 |
{ |
357 |
int retval = 0; |
358 |
|
359 |
if (fidp->fid_type == P9_FID_FILE) {
|
360 |
/* If we reclaimed the fd no need to close */
|
361 |
if (fidp->fs.fd != -1) { |
362 |
retval = v9fs_co_close(s, fidp->fs.fd); |
363 |
} |
364 |
} else if (fidp->fid_type == P9_FID_DIR) { |
365 |
if (fidp->fs.dir != NULL) { |
366 |
retval = v9fs_co_closedir(s, fidp->fs.dir); |
367 |
} |
368 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
369 |
retval = v9fs_xattr_fid_clunk(s, fidp); |
370 |
} |
371 |
v9fs_string_free(&fidp->path); |
372 |
g_free(fidp); |
373 |
return retval;
|
374 |
} |
375 |
|
376 |
static void put_fid(V9fsState *s, V9fsFidState *fidp) |
377 |
{ |
378 |
BUG_ON(!fidp->ref); |
379 |
fidp->ref--; |
380 |
/*
|
381 |
* Don't free the fid if it is in reclaim list
|
382 |
*/
|
383 |
if (!fidp->ref && fidp->clunked) {
|
384 |
free_fid(s, fidp); |
385 |
} |
386 |
} |
387 |
|
388 |
static int clunk_fid(V9fsState *s, int32_t fid) |
389 |
{ |
390 |
V9fsFidState **fidpp, *fidp; |
391 |
|
392 |
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
393 |
if ((*fidpp)->fid == fid) {
|
394 |
break;
|
395 |
} |
396 |
} |
397 |
|
398 |
if (*fidpp == NULL) { |
399 |
return -ENOENT;
|
400 |
} |
401 |
fidp = *fidpp; |
402 |
*fidpp = fidp->next; |
403 |
fidp->clunked = 1;
|
404 |
return 0; |
405 |
} |
406 |
|
407 |
void v9fs_reclaim_fd(V9fsState *s)
|
408 |
{ |
409 |
int reclaim_count = 0; |
410 |
V9fsFidState *f, *reclaim_list = NULL;
|
411 |
|
412 |
for (f = s->fid_list; f; f = f->next) {
|
413 |
/*
|
414 |
* Unlink fids cannot be reclaimed. Check
|
415 |
* for them and skip them. Also skip fids
|
416 |
* currently being operated on.
|
417 |
*/
|
418 |
if (f->ref || f->flags & FID_NON_RECLAIMABLE) {
|
419 |
continue;
|
420 |
} |
421 |
/*
|
422 |
* if it is a recently referenced fid
|
423 |
* we leave the fid untouched and clear the
|
424 |
* reference bit. We come back to it later
|
425 |
* in the next iteration. (a simple LRU without
|
426 |
* moving list elements around)
|
427 |
*/
|
428 |
if (f->flags & FID_REFERENCED) {
|
429 |
f->flags &= ~FID_REFERENCED; |
430 |
continue;
|
431 |
} |
432 |
/*
|
433 |
* Add fids to reclaim list.
|
434 |
*/
|
435 |
if (f->fid_type == P9_FID_FILE) {
|
436 |
if (f->fs.fd != -1) { |
437 |
/*
|
438 |
* Up the reference count so that
|
439 |
* a clunk request won't free this fid
|
440 |
*/
|
441 |
f->ref++; |
442 |
f->rclm_lst = reclaim_list; |
443 |
reclaim_list = f; |
444 |
f->fs_reclaim.fd = f->fs.fd; |
445 |
f->fs.fd = -1;
|
446 |
reclaim_count++; |
447 |
} |
448 |
} else if (f->fid_type == P9_FID_DIR) { |
449 |
if (f->fs.dir != NULL) { |
450 |
/*
|
451 |
* Up the reference count so that
|
452 |
* a clunk request won't free this fid
|
453 |
*/
|
454 |
f->ref++; |
455 |
f->rclm_lst = reclaim_list; |
456 |
reclaim_list = f; |
457 |
f->fs_reclaim.dir = f->fs.dir; |
458 |
f->fs.dir = NULL;
|
459 |
reclaim_count++; |
460 |
} |
461 |
} |
462 |
if (reclaim_count >= open_fd_rc) {
|
463 |
break;
|
464 |
} |
465 |
} |
466 |
/*
|
467 |
* Now close the fid in reclaim list. Free them if they
|
468 |
* are already clunked.
|
469 |
*/
|
470 |
while (reclaim_list) {
|
471 |
f = reclaim_list; |
472 |
reclaim_list = f->rclm_lst; |
473 |
if (f->fid_type == P9_FID_FILE) {
|
474 |
v9fs_co_close(s, f->fs_reclaim.fd); |
475 |
} else if (f->fid_type == P9_FID_DIR) { |
476 |
v9fs_co_closedir(s, f->fs_reclaim.dir); |
477 |
} |
478 |
f->rclm_lst = NULL;
|
479 |
/*
|
480 |
* Now drop the fid reference, free it
|
481 |
* if clunked.
|
482 |
*/
|
483 |
put_fid(s, f); |
484 |
} |
485 |
} |
486 |
|
487 |
static int v9fs_mark_fids_unreclaim(V9fsState *s, V9fsString *str) |
488 |
{ |
489 |
int err;
|
490 |
V9fsFidState *fidp, head_fid; |
491 |
|
492 |
head_fid.next = s->fid_list; |
493 |
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
494 |
if (!strcmp(fidp->path.data, str->data)) {
|
495 |
/* Mark the fid non reclaimable. */
|
496 |
fidp->flags |= FID_NON_RECLAIMABLE; |
497 |
|
498 |
/* reopen the file/dir if already closed */
|
499 |
err = v9fs_reopen_fid(s, fidp); |
500 |
if (err < 0) { |
501 |
return -1; |
502 |
} |
503 |
/*
|
504 |
* Go back to head of fid list because
|
505 |
* the list could have got updated when
|
506 |
* switched to the worker thread
|
507 |
*/
|
508 |
if (err == 0) { |
509 |
fidp = &head_fid; |
510 |
} |
511 |
} |
512 |
} |
513 |
return 0; |
514 |
} |
515 |
|
516 |
#define P9_QID_TYPE_DIR 0x80 |
517 |
#define P9_QID_TYPE_SYMLINK 0x02 |
518 |
|
519 |
#define P9_STAT_MODE_DIR 0x80000000 |
520 |
#define P9_STAT_MODE_APPEND 0x40000000 |
521 |
#define P9_STAT_MODE_EXCL 0x20000000 |
522 |
#define P9_STAT_MODE_MOUNT 0x10000000 |
523 |
#define P9_STAT_MODE_AUTH 0x08000000 |
524 |
#define P9_STAT_MODE_TMP 0x04000000 |
525 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
526 |
#define P9_STAT_MODE_LINK 0x01000000 |
527 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
528 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
529 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
530 |
#define P9_STAT_MODE_SETUID 0x00080000 |
531 |
#define P9_STAT_MODE_SETGID 0x00040000 |
532 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
533 |
|
534 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
535 |
P9_STAT_MODE_SYMLINK | \ |
536 |
P9_STAT_MODE_LINK | \ |
537 |
P9_STAT_MODE_DEVICE | \ |
538 |
P9_STAT_MODE_NAMED_PIPE | \ |
539 |
P9_STAT_MODE_SOCKET) |
540 |
|
541 |
/* This is the algorithm from ufs in spfs */
|
542 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
543 |
{ |
544 |
size_t size; |
545 |
|
546 |
memset(&qidp->path, 0, sizeof(qidp->path)); |
547 |
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
548 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
549 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
550 |
qidp->type = 0;
|
551 |
if (S_ISDIR(stbuf->st_mode)) {
|
552 |
qidp->type |= P9_QID_TYPE_DIR; |
553 |
} |
554 |
if (S_ISLNK(stbuf->st_mode)) {
|
555 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
556 |
} |
557 |
} |
558 |
|
559 |
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) |
560 |
{ |
561 |
struct stat stbuf;
|
562 |
int err;
|
563 |
|
564 |
err = v9fs_co_lstat(s, &fidp->path, &stbuf); |
565 |
if (err < 0) { |
566 |
return err;
|
567 |
} |
568 |
stat_to_qid(&stbuf, qidp); |
569 |
return 0; |
570 |
} |
571 |
|
572 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
573 |
{ |
574 |
V9fsPDU *pdu = NULL;
|
575 |
|
576 |
if (!QLIST_EMPTY(&s->free_list)) {
|
577 |
pdu = QLIST_FIRST(&s->free_list); |
578 |
QLIST_REMOVE(pdu, next); |
579 |
} |
580 |
return pdu;
|
581 |
} |
582 |
|
583 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
584 |
{ |
585 |
if (pdu) {
|
586 |
if (debug_9p_pdu) {
|
587 |
pprint_pdu(pdu); |
588 |
} |
589 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
590 |
} |
591 |
} |
592 |
|
593 |
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
594 |
size_t offset, size_t size, int pack)
|
595 |
{ |
596 |
int i = 0; |
597 |
size_t copied = 0;
|
598 |
|
599 |
for (i = 0; size && i < sg_count; i++) { |
600 |
size_t len; |
601 |
if (offset >= sg[i].iov_len) {
|
602 |
/* skip this sg */
|
603 |
offset -= sg[i].iov_len; |
604 |
continue;
|
605 |
} else {
|
606 |
len = MIN(sg[i].iov_len - offset, size); |
607 |
if (pack) {
|
608 |
memcpy(sg[i].iov_base + offset, addr, len); |
609 |
} else {
|
610 |
memcpy(addr, sg[i].iov_base + offset, len); |
611 |
} |
612 |
size -= len; |
613 |
copied += len; |
614 |
addr += len; |
615 |
if (size) {
|
616 |
offset = 0;
|
617 |
continue;
|
618 |
} |
619 |
} |
620 |
} |
621 |
|
622 |
return copied;
|
623 |
} |
624 |
|
625 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
626 |
{ |
627 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
628 |
offset, size, 0);
|
629 |
} |
630 |
|
631 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, |
632 |
size_t size) |
633 |
{ |
634 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, |
635 |
offset, size, 1);
|
636 |
} |
637 |
|
638 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) |
639 |
{ |
640 |
size_t pos = 0;
|
641 |
int i, j;
|
642 |
struct iovec *src_sg;
|
643 |
unsigned int num; |
644 |
|
645 |
if (rx) {
|
646 |
src_sg = pdu->elem.in_sg; |
647 |
num = pdu->elem.in_num; |
648 |
} else {
|
649 |
src_sg = pdu->elem.out_sg; |
650 |
num = pdu->elem.out_num; |
651 |
} |
652 |
|
653 |
j = 0;
|
654 |
for (i = 0; i < num; i++) { |
655 |
if (offset <= pos) {
|
656 |
sg[j].iov_base = src_sg[i].iov_base; |
657 |
sg[j].iov_len = src_sg[i].iov_len; |
658 |
j++; |
659 |
} else if (offset < (src_sg[i].iov_len + pos)) { |
660 |
sg[j].iov_base = src_sg[i].iov_base; |
661 |
sg[j].iov_len = src_sg[i].iov_len; |
662 |
sg[j].iov_base += (offset - pos); |
663 |
sg[j].iov_len -= (offset - pos); |
664 |
j++; |
665 |
} |
666 |
pos += src_sg[i].iov_len; |
667 |
} |
668 |
|
669 |
return j;
|
670 |
} |
671 |
|
672 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
673 |
{ |
674 |
size_t old_offset = offset; |
675 |
va_list ap; |
676 |
int i;
|
677 |
|
678 |
va_start(ap, fmt); |
679 |
for (i = 0; fmt[i]; i++) { |
680 |
switch (fmt[i]) {
|
681 |
case 'b': { |
682 |
uint8_t *valp = va_arg(ap, uint8_t *); |
683 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
684 |
break;
|
685 |
} |
686 |
case 'w': { |
687 |
uint16_t val, *valp; |
688 |
valp = va_arg(ap, uint16_t *); |
689 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
690 |
*valp = le16_to_cpu(val); |
691 |
break;
|
692 |
} |
693 |
case 'd': { |
694 |
uint32_t val, *valp; |
695 |
valp = va_arg(ap, uint32_t *); |
696 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
697 |
*valp = le32_to_cpu(val); |
698 |
break;
|
699 |
} |
700 |
case 'q': { |
701 |
uint64_t val, *valp; |
702 |
valp = va_arg(ap, uint64_t *); |
703 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
704 |
*valp = le64_to_cpu(val); |
705 |
break;
|
706 |
} |
707 |
case 'v': { |
708 |
struct iovec *iov = va_arg(ap, struct iovec *); |
709 |
int *iovcnt = va_arg(ap, int *); |
710 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
711 |
break;
|
712 |
} |
713 |
case 's': { |
714 |
V9fsString *str = va_arg(ap, V9fsString *); |
715 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
716 |
/* FIXME: sanity check str->size */
|
717 |
str->data = g_malloc(str->size + 1);
|
718 |
offset += pdu_unpack(str->data, pdu, offset, str->size); |
719 |
str->data[str->size] = 0;
|
720 |
break;
|
721 |
} |
722 |
case 'Q': { |
723 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
724 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
725 |
&qidp->type, &qidp->version, &qidp->path); |
726 |
break;
|
727 |
} |
728 |
case 'S': { |
729 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
730 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
731 |
&statp->size, &statp->type, &statp->dev, |
732 |
&statp->qid, &statp->mode, &statp->atime, |
733 |
&statp->mtime, &statp->length, |
734 |
&statp->name, &statp->uid, &statp->gid, |
735 |
&statp->muid, &statp->extension, |
736 |
&statp->n_uid, &statp->n_gid, |
737 |
&statp->n_muid); |
738 |
break;
|
739 |
} |
740 |
case 'I': { |
741 |
V9fsIattr *iattr = va_arg(ap, V9fsIattr *); |
742 |
offset += pdu_unmarshal(pdu, offset, "ddddqqqqq",
|
743 |
&iattr->valid, &iattr->mode, |
744 |
&iattr->uid, &iattr->gid, &iattr->size, |
745 |
&iattr->atime_sec, &iattr->atime_nsec, |
746 |
&iattr->mtime_sec, &iattr->mtime_nsec); |
747 |
break;
|
748 |
} |
749 |
default:
|
750 |
break;
|
751 |
} |
752 |
} |
753 |
|
754 |
va_end(ap); |
755 |
|
756 |
return offset - old_offset;
|
757 |
} |
758 |
|
759 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
760 |
{ |
761 |
size_t old_offset = offset; |
762 |
va_list ap; |
763 |
int i;
|
764 |
|
765 |
va_start(ap, fmt); |
766 |
for (i = 0; fmt[i]; i++) { |
767 |
switch (fmt[i]) {
|
768 |
case 'b': { |
769 |
uint8_t val = va_arg(ap, int);
|
770 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
771 |
break;
|
772 |
} |
773 |
case 'w': { |
774 |
uint16_t val; |
775 |
cpu_to_le16w(&val, va_arg(ap, int));
|
776 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
777 |
break;
|
778 |
} |
779 |
case 'd': { |
780 |
uint32_t val; |
781 |
cpu_to_le32w(&val, va_arg(ap, uint32_t)); |
782 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
783 |
break;
|
784 |
} |
785 |
case 'q': { |
786 |
uint64_t val; |
787 |
cpu_to_le64w(&val, va_arg(ap, uint64_t)); |
788 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
789 |
break;
|
790 |
} |
791 |
case 'v': { |
792 |
struct iovec *iov = va_arg(ap, struct iovec *); |
793 |
int *iovcnt = va_arg(ap, int *); |
794 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
795 |
break;
|
796 |
} |
797 |
case 's': { |
798 |
V9fsString *str = va_arg(ap, V9fsString *); |
799 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
800 |
offset += pdu_pack(pdu, offset, str->data, str->size); |
801 |
break;
|
802 |
} |
803 |
case 'Q': { |
804 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
805 |
offset += pdu_marshal(pdu, offset, "bdq",
|
806 |
qidp->type, qidp->version, qidp->path); |
807 |
break;
|
808 |
} |
809 |
case 'S': { |
810 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
811 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
812 |
statp->size, statp->type, statp->dev, |
813 |
&statp->qid, statp->mode, statp->atime, |
814 |
statp->mtime, statp->length, &statp->name, |
815 |
&statp->uid, &statp->gid, &statp->muid, |
816 |
&statp->extension, statp->n_uid, |
817 |
statp->n_gid, statp->n_muid); |
818 |
break;
|
819 |
} |
820 |
case 'A': { |
821 |
V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); |
822 |
offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
|
823 |
statp->st_result_mask, |
824 |
&statp->qid, statp->st_mode, |
825 |
statp->st_uid, statp->st_gid, |
826 |
statp->st_nlink, statp->st_rdev, |
827 |
statp->st_size, statp->st_blksize, statp->st_blocks, |
828 |
statp->st_atime_sec, statp->st_atime_nsec, |
829 |
statp->st_mtime_sec, statp->st_mtime_nsec, |
830 |
statp->st_ctime_sec, statp->st_ctime_nsec, |
831 |
statp->st_btime_sec, statp->st_btime_nsec, |
832 |
statp->st_gen, statp->st_data_version); |
833 |
break;
|
834 |
} |
835 |
default:
|
836 |
break;
|
837 |
} |
838 |
} |
839 |
va_end(ap); |
840 |
|
841 |
return offset - old_offset;
|
842 |
} |
843 |
|
844 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
845 |
{ |
846 |
int8_t id = pdu->id + 1; /* Response */ |
847 |
|
848 |
if (len < 0) { |
849 |
int err = -len;
|
850 |
len = 7;
|
851 |
|
852 |
if (s->proto_version != V9FS_PROTO_2000L) {
|
853 |
V9fsString str; |
854 |
|
855 |
str.data = strerror(err); |
856 |
str.size = strlen(str.data); |
857 |
|
858 |
len += pdu_marshal(pdu, len, "s", &str);
|
859 |
id = P9_RERROR; |
860 |
} |
861 |
|
862 |
len += pdu_marshal(pdu, len, "d", err);
|
863 |
|
864 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
865 |
id = P9_RLERROR; |
866 |
} |
867 |
} |
868 |
|
869 |
/* fill out the header */
|
870 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
871 |
|
872 |
/* keep these in sync */
|
873 |
pdu->size = len; |
874 |
pdu->id = id; |
875 |
|
876 |
/* push onto queue and notify */
|
877 |
virtqueue_push(s->vq, &pdu->elem, len); |
878 |
|
879 |
/* FIXME: we should batch these completions */
|
880 |
virtio_notify(&s->vdev, s->vq); |
881 |
|
882 |
free_pdu(s, pdu); |
883 |
} |
884 |
|
885 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
886 |
{ |
887 |
mode_t ret; |
888 |
|
889 |
ret = mode & 0777;
|
890 |
if (mode & P9_STAT_MODE_DIR) {
|
891 |
ret |= S_IFDIR; |
892 |
} |
893 |
|
894 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
895 |
ret |= S_IFLNK; |
896 |
} |
897 |
if (mode & P9_STAT_MODE_SOCKET) {
|
898 |
ret |= S_IFSOCK; |
899 |
} |
900 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
901 |
ret |= S_IFIFO; |
902 |
} |
903 |
if (mode & P9_STAT_MODE_DEVICE) {
|
904 |
if (extension && extension->data[0] == 'c') { |
905 |
ret |= S_IFCHR; |
906 |
} else {
|
907 |
ret |= S_IFBLK; |
908 |
} |
909 |
} |
910 |
|
911 |
if (!(ret&~0777)) { |
912 |
ret |= S_IFREG; |
913 |
} |
914 |
|
915 |
if (mode & P9_STAT_MODE_SETUID) {
|
916 |
ret |= S_ISUID; |
917 |
} |
918 |
if (mode & P9_STAT_MODE_SETGID) {
|
919 |
ret |= S_ISGID; |
920 |
} |
921 |
if (mode & P9_STAT_MODE_SETVTX) {
|
922 |
ret |= S_ISVTX; |
923 |
} |
924 |
|
925 |
return ret;
|
926 |
} |
927 |
|
928 |
static int donttouch_stat(V9fsStat *stat) |
929 |
{ |
930 |
if (stat->type == -1 && |
931 |
stat->dev == -1 &&
|
932 |
stat->qid.type == -1 &&
|
933 |
stat->qid.version == -1 &&
|
934 |
stat->qid.path == -1 &&
|
935 |
stat->mode == -1 &&
|
936 |
stat->atime == -1 &&
|
937 |
stat->mtime == -1 &&
|
938 |
stat->length == -1 &&
|
939 |
!stat->name.size && |
940 |
!stat->uid.size && |
941 |
!stat->gid.size && |
942 |
!stat->muid.size && |
943 |
stat->n_uid == -1 &&
|
944 |
stat->n_gid == -1 &&
|
945 |
stat->n_muid == -1) {
|
946 |
return 1; |
947 |
} |
948 |
|
949 |
return 0; |
950 |
} |
951 |
|
952 |
static void v9fs_stat_free(V9fsStat *stat) |
953 |
{ |
954 |
v9fs_string_free(&stat->name); |
955 |
v9fs_string_free(&stat->uid); |
956 |
v9fs_string_free(&stat->gid); |
957 |
v9fs_string_free(&stat->muid); |
958 |
v9fs_string_free(&stat->extension); |
959 |
} |
960 |
|
961 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
962 |
{ |
963 |
uint32_t mode; |
964 |
|
965 |
mode = stbuf->st_mode & 0777;
|
966 |
if (S_ISDIR(stbuf->st_mode)) {
|
967 |
mode |= P9_STAT_MODE_DIR; |
968 |
} |
969 |
|
970 |
if (S_ISLNK(stbuf->st_mode)) {
|
971 |
mode |= P9_STAT_MODE_SYMLINK; |
972 |
} |
973 |
|
974 |
if (S_ISSOCK(stbuf->st_mode)) {
|
975 |
mode |= P9_STAT_MODE_SOCKET; |
976 |
} |
977 |
|
978 |
if (S_ISFIFO(stbuf->st_mode)) {
|
979 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
980 |
} |
981 |
|
982 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
983 |
mode |= P9_STAT_MODE_DEVICE; |
984 |
} |
985 |
|
986 |
if (stbuf->st_mode & S_ISUID) {
|
987 |
mode |= P9_STAT_MODE_SETUID; |
988 |
} |
989 |
|
990 |
if (stbuf->st_mode & S_ISGID) {
|
991 |
mode |= P9_STAT_MODE_SETGID; |
992 |
} |
993 |
|
994 |
if (stbuf->st_mode & S_ISVTX) {
|
995 |
mode |= P9_STAT_MODE_SETVTX; |
996 |
} |
997 |
|
998 |
return mode;
|
999 |
} |
1000 |
|
1001 |
static int stat_to_v9stat(V9fsState *s, V9fsString *name, |
1002 |
const struct stat *stbuf, |
1003 |
V9fsStat *v9stat) |
1004 |
{ |
1005 |
int err;
|
1006 |
const char *str; |
1007 |
|
1008 |
memset(v9stat, 0, sizeof(*v9stat)); |
1009 |
|
1010 |
stat_to_qid(stbuf, &v9stat->qid); |
1011 |
v9stat->mode = stat_to_v9mode(stbuf); |
1012 |
v9stat->atime = stbuf->st_atime; |
1013 |
v9stat->mtime = stbuf->st_mtime; |
1014 |
v9stat->length = stbuf->st_size; |
1015 |
|
1016 |
v9fs_string_null(&v9stat->uid); |
1017 |
v9fs_string_null(&v9stat->gid); |
1018 |
v9fs_string_null(&v9stat->muid); |
1019 |
|
1020 |
v9stat->n_uid = stbuf->st_uid; |
1021 |
v9stat->n_gid = stbuf->st_gid; |
1022 |
v9stat->n_muid = 0;
|
1023 |
|
1024 |
v9fs_string_null(&v9stat->extension); |
1025 |
|
1026 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
1027 |
err = v9fs_co_readlink(s, name, &v9stat->extension); |
1028 |
if (err < 0) { |
1029 |
return err;
|
1030 |
} |
1031 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1032 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
1033 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
1034 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
1035 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
1036 |
v9fs_string_sprintf(&v9stat->extension, "%s %lu",
|
1037 |
"HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); |
1038 |
} |
1039 |
|
1040 |
str = strrchr(name->data, '/');
|
1041 |
if (str) {
|
1042 |
str += 1;
|
1043 |
} else {
|
1044 |
str = name->data; |
1045 |
} |
1046 |
|
1047 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
1048 |
|
1049 |
v9stat->size = 61 +
|
1050 |
v9fs_string_size(&v9stat->name) + |
1051 |
v9fs_string_size(&v9stat->uid) + |
1052 |
v9fs_string_size(&v9stat->gid) + |
1053 |
v9fs_string_size(&v9stat->muid) + |
1054 |
v9fs_string_size(&v9stat->extension); |
1055 |
return 0; |
1056 |
} |
1057 |
|
1058 |
#define P9_STATS_MODE 0x00000001ULL |
1059 |
#define P9_STATS_NLINK 0x00000002ULL |
1060 |
#define P9_STATS_UID 0x00000004ULL |
1061 |
#define P9_STATS_GID 0x00000008ULL |
1062 |
#define P9_STATS_RDEV 0x00000010ULL |
1063 |
#define P9_STATS_ATIME 0x00000020ULL |
1064 |
#define P9_STATS_MTIME 0x00000040ULL |
1065 |
#define P9_STATS_CTIME 0x00000080ULL |
1066 |
#define P9_STATS_INO 0x00000100ULL |
1067 |
#define P9_STATS_SIZE 0x00000200ULL |
1068 |
#define P9_STATS_BLOCKS 0x00000400ULL |
1069 |
|
1070 |
#define P9_STATS_BTIME 0x00000800ULL |
1071 |
#define P9_STATS_GEN 0x00001000ULL |
1072 |
#define P9_STATS_DATA_VERSION 0x00002000ULL |
1073 |
|
1074 |
#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ |
1075 |
#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ |
1076 |
|
1077 |
|
1078 |
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, |
1079 |
V9fsStatDotl *v9lstat) |
1080 |
{ |
1081 |
memset(v9lstat, 0, sizeof(*v9lstat)); |
1082 |
|
1083 |
v9lstat->st_mode = stbuf->st_mode; |
1084 |
v9lstat->st_nlink = stbuf->st_nlink; |
1085 |
v9lstat->st_uid = stbuf->st_uid; |
1086 |
v9lstat->st_gid = stbuf->st_gid; |
1087 |
v9lstat->st_rdev = stbuf->st_rdev; |
1088 |
v9lstat->st_size = stbuf->st_size; |
1089 |
v9lstat->st_blksize = stbuf->st_blksize; |
1090 |
v9lstat->st_blocks = stbuf->st_blocks; |
1091 |
v9lstat->st_atime_sec = stbuf->st_atime; |
1092 |
v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; |
1093 |
v9lstat->st_mtime_sec = stbuf->st_mtime; |
1094 |
v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; |
1095 |
v9lstat->st_ctime_sec = stbuf->st_ctime; |
1096 |
v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; |
1097 |
/* Currently we only support BASIC fields in stat */
|
1098 |
v9lstat->st_result_mask = P9_STATS_BASIC; |
1099 |
|
1100 |
stat_to_qid(stbuf, &v9lstat->qid); |
1101 |
} |
1102 |
|
1103 |
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1104 |
{ |
1105 |
while (len && *iovcnt) {
|
1106 |
if (len < sg->iov_len) {
|
1107 |
sg->iov_len -= len; |
1108 |
sg->iov_base += len; |
1109 |
len = 0;
|
1110 |
} else {
|
1111 |
len -= sg->iov_len; |
1112 |
sg++; |
1113 |
*iovcnt -= 1;
|
1114 |
} |
1115 |
} |
1116 |
|
1117 |
return sg;
|
1118 |
} |
1119 |
|
1120 |
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) |
1121 |
{ |
1122 |
int i;
|
1123 |
int total = 0; |
1124 |
|
1125 |
for (i = 0; i < *cnt; i++) { |
1126 |
if ((total + sg[i].iov_len) > cap) {
|
1127 |
sg[i].iov_len -= ((total + sg[i].iov_len) - cap); |
1128 |
i++; |
1129 |
break;
|
1130 |
} |
1131 |
total += sg[i].iov_len; |
1132 |
} |
1133 |
|
1134 |
*cnt = i; |
1135 |
|
1136 |
return sg;
|
1137 |
} |
1138 |
|
1139 |
static void print_sg(struct iovec *sg, int cnt) |
1140 |
{ |
1141 |
int i;
|
1142 |
|
1143 |
printf("sg[%d]: {", cnt);
|
1144 |
for (i = 0; i < cnt; i++) { |
1145 |
if (i) {
|
1146 |
printf(", ");
|
1147 |
} |
1148 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
1149 |
} |
1150 |
printf("}\n");
|
1151 |
} |
1152 |
|
1153 |
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1154 |
{ |
1155 |
V9fsString str; |
1156 |
v9fs_string_init(&str); |
1157 |
v9fs_string_copy(&str, dst); |
1158 |
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
1159 |
v9fs_string_free(&str); |
1160 |
} |
1161 |
|
1162 |
static void v9fs_version(void *opaque) |
1163 |
{ |
1164 |
V9fsPDU *pdu = opaque; |
1165 |
V9fsState *s = pdu->s; |
1166 |
V9fsString version; |
1167 |
size_t offset = 7;
|
1168 |
|
1169 |
pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
|
1170 |
|
1171 |
if (!strcmp(version.data, "9P2000.u")) { |
1172 |
s->proto_version = V9FS_PROTO_2000U; |
1173 |
} else if (!strcmp(version.data, "9P2000.L")) { |
1174 |
s->proto_version = V9FS_PROTO_2000L; |
1175 |
} else {
|
1176 |
v9fs_string_sprintf(&version, "unknown");
|
1177 |
} |
1178 |
|
1179 |
offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
|
1180 |
complete_pdu(s, pdu, offset); |
1181 |
|
1182 |
v9fs_string_free(&version); |
1183 |
return;
|
1184 |
} |
1185 |
|
1186 |
static void v9fs_attach(void *opaque) |
1187 |
{ |
1188 |
V9fsPDU *pdu = opaque; |
1189 |
V9fsState *s = pdu->s; |
1190 |
int32_t fid, afid, n_uname; |
1191 |
V9fsString uname, aname; |
1192 |
V9fsFidState *fidp; |
1193 |
size_t offset = 7;
|
1194 |
V9fsQID qid; |
1195 |
ssize_t err; |
1196 |
|
1197 |
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
1198 |
|
1199 |
fidp = alloc_fid(s, fid); |
1200 |
if (fidp == NULL) { |
1201 |
err = -EINVAL; |
1202 |
goto out_nofid;
|
1203 |
} |
1204 |
fidp->uid = n_uname; |
1205 |
v9fs_string_sprintf(&fidp->path, "%s", "/"); |
1206 |
err = fid_to_qid(s, fidp, &qid); |
1207 |
if (err < 0) { |
1208 |
err = -EINVAL; |
1209 |
clunk_fid(s, fid); |
1210 |
goto out;
|
1211 |
} |
1212 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
1213 |
err = offset; |
1214 |
out:
|
1215 |
put_fid(s, fidp); |
1216 |
out_nofid:
|
1217 |
complete_pdu(s, pdu, err); |
1218 |
v9fs_string_free(&uname); |
1219 |
v9fs_string_free(&aname); |
1220 |
} |
1221 |
|
1222 |
static void v9fs_stat(void *opaque) |
1223 |
{ |
1224 |
int32_t fid; |
1225 |
V9fsStat v9stat; |
1226 |
ssize_t err = 0;
|
1227 |
size_t offset = 7;
|
1228 |
struct stat stbuf;
|
1229 |
V9fsFidState *fidp; |
1230 |
V9fsPDU *pdu = opaque; |
1231 |
V9fsState *s = pdu->s; |
1232 |
|
1233 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
1234 |
|
1235 |
fidp = get_fid(s, fid); |
1236 |
if (fidp == NULL) { |
1237 |
err = -ENOENT; |
1238 |
goto out_nofid;
|
1239 |
} |
1240 |
err = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1241 |
if (err < 0) { |
1242 |
goto out;
|
1243 |
} |
1244 |
err = stat_to_v9stat(s, &fidp->path, &stbuf, &v9stat); |
1245 |
if (err < 0) { |
1246 |
goto out;
|
1247 |
} |
1248 |
offset += pdu_marshal(pdu, offset, "wS", 0, &v9stat); |
1249 |
err = offset; |
1250 |
v9fs_stat_free(&v9stat); |
1251 |
out:
|
1252 |
put_fid(s, fidp); |
1253 |
out_nofid:
|
1254 |
complete_pdu(s, pdu, err); |
1255 |
} |
1256 |
|
1257 |
static void v9fs_getattr(void *opaque) |
1258 |
{ |
1259 |
int32_t fid; |
1260 |
size_t offset = 7;
|
1261 |
ssize_t retval = 0;
|
1262 |
struct stat stbuf;
|
1263 |
V9fsFidState *fidp; |
1264 |
uint64_t request_mask; |
1265 |
V9fsStatDotl v9stat_dotl; |
1266 |
V9fsPDU *pdu = opaque; |
1267 |
V9fsState *s = pdu->s; |
1268 |
|
1269 |
pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask);
|
1270 |
|
1271 |
fidp = get_fid(s, fid); |
1272 |
if (fidp == NULL) { |
1273 |
retval = -ENOENT; |
1274 |
goto out_nofid;
|
1275 |
} |
1276 |
/*
|
1277 |
* Currently we only support BASIC fields in stat, so there is no
|
1278 |
* need to look at request_mask.
|
1279 |
*/
|
1280 |
retval = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1281 |
if (retval < 0) { |
1282 |
goto out;
|
1283 |
} |
1284 |
stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); |
1285 |
retval = offset; |
1286 |
retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl);
|
1287 |
out:
|
1288 |
put_fid(s, fidp); |
1289 |
out_nofid:
|
1290 |
complete_pdu(s, pdu, retval); |
1291 |
} |
1292 |
|
1293 |
/* From Linux kernel code */
|
1294 |
#define ATTR_MODE (1 << 0) |
1295 |
#define ATTR_UID (1 << 1) |
1296 |
#define ATTR_GID (1 << 2) |
1297 |
#define ATTR_SIZE (1 << 3) |
1298 |
#define ATTR_ATIME (1 << 4) |
1299 |
#define ATTR_MTIME (1 << 5) |
1300 |
#define ATTR_CTIME (1 << 6) |
1301 |
#define ATTR_MASK 127 |
1302 |
#define ATTR_ATIME_SET (1 << 7) |
1303 |
#define ATTR_MTIME_SET (1 << 8) |
1304 |
|
1305 |
static void v9fs_setattr(void *opaque) |
1306 |
{ |
1307 |
int err = 0; |
1308 |
int32_t fid; |
1309 |
V9fsFidState *fidp; |
1310 |
size_t offset = 7;
|
1311 |
V9fsIattr v9iattr; |
1312 |
V9fsPDU *pdu = opaque; |
1313 |
V9fsState *s = pdu->s; |
1314 |
|
1315 |
pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr);
|
1316 |
|
1317 |
fidp = get_fid(s, fid); |
1318 |
if (fidp == NULL) { |
1319 |
err = -EINVAL; |
1320 |
goto out_nofid;
|
1321 |
} |
1322 |
if (v9iattr.valid & ATTR_MODE) {
|
1323 |
err = v9fs_co_chmod(s, &fidp->path, v9iattr.mode); |
1324 |
if (err < 0) { |
1325 |
goto out;
|
1326 |
} |
1327 |
} |
1328 |
if (v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) {
|
1329 |
struct timespec times[2]; |
1330 |
if (v9iattr.valid & ATTR_ATIME) {
|
1331 |
if (v9iattr.valid & ATTR_ATIME_SET) {
|
1332 |
times[0].tv_sec = v9iattr.atime_sec;
|
1333 |
times[0].tv_nsec = v9iattr.atime_nsec;
|
1334 |
} else {
|
1335 |
times[0].tv_nsec = UTIME_NOW;
|
1336 |
} |
1337 |
} else {
|
1338 |
times[0].tv_nsec = UTIME_OMIT;
|
1339 |
} |
1340 |
if (v9iattr.valid & ATTR_MTIME) {
|
1341 |
if (v9iattr.valid & ATTR_MTIME_SET) {
|
1342 |
times[1].tv_sec = v9iattr.mtime_sec;
|
1343 |
times[1].tv_nsec = v9iattr.mtime_nsec;
|
1344 |
} else {
|
1345 |
times[1].tv_nsec = UTIME_NOW;
|
1346 |
} |
1347 |
} else {
|
1348 |
times[1].tv_nsec = UTIME_OMIT;
|
1349 |
} |
1350 |
err = v9fs_co_utimensat(s, &fidp->path, times); |
1351 |
if (err < 0) { |
1352 |
goto out;
|
1353 |
} |
1354 |
} |
1355 |
/*
|
1356 |
* If the only valid entry in iattr is ctime we can call
|
1357 |
* chown(-1,-1) to update the ctime of the file
|
1358 |
*/
|
1359 |
if ((v9iattr.valid & (ATTR_UID | ATTR_GID)) ||
|
1360 |
((v9iattr.valid & ATTR_CTIME) |
1361 |
&& !((v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { |
1362 |
if (!(v9iattr.valid & ATTR_UID)) {
|
1363 |
v9iattr.uid = -1;
|
1364 |
} |
1365 |
if (!(v9iattr.valid & ATTR_GID)) {
|
1366 |
v9iattr.gid = -1;
|
1367 |
} |
1368 |
err = v9fs_co_chown(s, &fidp->path, v9iattr.uid, |
1369 |
v9iattr.gid); |
1370 |
if (err < 0) { |
1371 |
goto out;
|
1372 |
} |
1373 |
} |
1374 |
if (v9iattr.valid & (ATTR_SIZE)) {
|
1375 |
err = v9fs_co_truncate(s, &fidp->path, v9iattr.size); |
1376 |
if (err < 0) { |
1377 |
goto out;
|
1378 |
} |
1379 |
} |
1380 |
err = offset; |
1381 |
out:
|
1382 |
put_fid(s, fidp); |
1383 |
out_nofid:
|
1384 |
complete_pdu(s, pdu, err); |
1385 |
} |
1386 |
|
1387 |
static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) |
1388 |
{ |
1389 |
int i;
|
1390 |
size_t offset = 7;
|
1391 |
offset += pdu_marshal(pdu, offset, "w", nwnames);
|
1392 |
for (i = 0; i < nwnames; i++) { |
1393 |
offset += pdu_marshal(pdu, offset, "Q", &qids[i]);
|
1394 |
} |
1395 |
return offset;
|
1396 |
} |
1397 |
|
1398 |
static void v9fs_walk(void *opaque) |
1399 |
{ |
1400 |
int name_idx;
|
1401 |
V9fsQID *qids = NULL;
|
1402 |
int i, err = 0; |
1403 |
V9fsString path; |
1404 |
uint16_t nwnames; |
1405 |
struct stat stbuf;
|
1406 |
size_t offset = 7;
|
1407 |
int32_t fid, newfid; |
1408 |
V9fsString *wnames = NULL;
|
1409 |
V9fsFidState *fidp; |
1410 |
V9fsFidState *newfidp = NULL;;
|
1411 |
V9fsPDU *pdu = opaque; |
1412 |
V9fsState *s = pdu->s; |
1413 |
|
1414 |
offset += pdu_unmarshal(pdu, offset, "ddw", &fid,
|
1415 |
&newfid, &nwnames); |
1416 |
|
1417 |
if (nwnames && nwnames <= P9_MAXWELEM) {
|
1418 |
wnames = g_malloc0(sizeof(wnames[0]) * nwnames); |
1419 |
qids = g_malloc0(sizeof(qids[0]) * nwnames); |
1420 |
for (i = 0; i < nwnames; i++) { |
1421 |
offset += pdu_unmarshal(pdu, offset, "s", &wnames[i]);
|
1422 |
} |
1423 |
|
1424 |
} else if (nwnames > P9_MAXWELEM) { |
1425 |
err = -EINVAL; |
1426 |
goto out_nofid;
|
1427 |
} |
1428 |
fidp = get_fid(s, fid); |
1429 |
if (fidp == NULL) { |
1430 |
err = -ENOENT; |
1431 |
goto out_nofid;
|
1432 |
} |
1433 |
if (fid == newfid) {
|
1434 |
BUG_ON(fidp->fid_type != P9_FID_NONE); |
1435 |
v9fs_string_init(&path); |
1436 |
for (name_idx = 0; name_idx < nwnames; name_idx++) { |
1437 |
v9fs_string_sprintf(&path, "%s/%s",
|
1438 |
fidp->path.data, wnames[name_idx].data); |
1439 |
v9fs_string_copy(&fidp->path, &path); |
1440 |
|
1441 |
err = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1442 |
if (err < 0) { |
1443 |
v9fs_string_free(&path); |
1444 |
goto out;
|
1445 |
} |
1446 |
stat_to_qid(&stbuf, &qids[name_idx]); |
1447 |
} |
1448 |
v9fs_string_free(&path); |
1449 |
} else {
|
1450 |
newfidp = alloc_fid(s, newfid); |
1451 |
if (newfidp == NULL) { |
1452 |
err = -EINVAL; |
1453 |
goto out;
|
1454 |
} |
1455 |
newfidp->uid = fidp->uid; |
1456 |
v9fs_string_init(&path); |
1457 |
v9fs_string_copy(&newfidp->path, &fidp->path); |
1458 |
for (name_idx = 0; name_idx < nwnames; name_idx++) { |
1459 |
v9fs_string_sprintf(&path, "%s/%s", newfidp->path.data,
|
1460 |
wnames[name_idx].data); |
1461 |
v9fs_string_copy(&newfidp->path, &path); |
1462 |
err = v9fs_co_lstat(s, &newfidp->path, &stbuf); |
1463 |
if (err < 0) { |
1464 |
clunk_fid(s, newfidp->fid); |
1465 |
v9fs_string_free(&path); |
1466 |
goto out;
|
1467 |
} |
1468 |
stat_to_qid(&stbuf, &qids[name_idx]); |
1469 |
} |
1470 |
v9fs_string_free(&path); |
1471 |
} |
1472 |
err = v9fs_walk_marshal(pdu, nwnames, qids); |
1473 |
out:
|
1474 |
put_fid(s, fidp); |
1475 |
if (newfidp) {
|
1476 |
put_fid(s, newfidp); |
1477 |
} |
1478 |
out_nofid:
|
1479 |
complete_pdu(s, pdu, err); |
1480 |
if (nwnames && nwnames <= P9_MAXWELEM) {
|
1481 |
for (name_idx = 0; name_idx < nwnames; name_idx++) { |
1482 |
v9fs_string_free(&wnames[name_idx]); |
1483 |
} |
1484 |
g_free(wnames); |
1485 |
g_free(qids); |
1486 |
} |
1487 |
} |
1488 |
|
1489 |
static int32_t get_iounit(V9fsState *s, V9fsString *name)
|
1490 |
{ |
1491 |
struct statfs stbuf;
|
1492 |
int32_t iounit = 0;
|
1493 |
|
1494 |
/*
|
1495 |
* iounit should be multiples of f_bsize (host filesystem block size
|
1496 |
* and as well as less than (client msize - P9_IOHDRSZ))
|
1497 |
*/
|
1498 |
if (!v9fs_co_statfs(s, name, &stbuf)) {
|
1499 |
iounit = stbuf.f_bsize; |
1500 |
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; |
1501 |
} |
1502 |
if (!iounit) {
|
1503 |
iounit = s->msize - P9_IOHDRSZ; |
1504 |
} |
1505 |
return iounit;
|
1506 |
} |
1507 |
|
1508 |
static void v9fs_open(void *opaque) |
1509 |
{ |
1510 |
int flags;
|
1511 |
int iounit;
|
1512 |
int32_t fid; |
1513 |
int32_t mode; |
1514 |
V9fsQID qid; |
1515 |
ssize_t err = 0;
|
1516 |
size_t offset = 7;
|
1517 |
struct stat stbuf;
|
1518 |
V9fsFidState *fidp; |
1519 |
V9fsPDU *pdu = opaque; |
1520 |
V9fsState *s = pdu->s; |
1521 |
|
1522 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
1523 |
pdu_unmarshal(pdu, offset, "dd", &fid, &mode);
|
1524 |
} else {
|
1525 |
pdu_unmarshal(pdu, offset, "db", &fid, &mode);
|
1526 |
} |
1527 |
fidp = get_fid(s, fid); |
1528 |
if (fidp == NULL) { |
1529 |
err = -ENOENT; |
1530 |
goto out_nofid;
|
1531 |
} |
1532 |
BUG_ON(fidp->fid_type != P9_FID_NONE); |
1533 |
|
1534 |
err = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1535 |
if (err < 0) { |
1536 |
goto out;
|
1537 |
} |
1538 |
stat_to_qid(&stbuf, &qid); |
1539 |
if (S_ISDIR(stbuf.st_mode)) {
|
1540 |
err = v9fs_co_opendir(s, fidp); |
1541 |
if (err < 0) { |
1542 |
goto out;
|
1543 |
} |
1544 |
fidp->fid_type = P9_FID_DIR; |
1545 |
offset += pdu_marshal(pdu, offset, "Qd", &qid, 0); |
1546 |
err = offset; |
1547 |
} else {
|
1548 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
1549 |
flags = mode; |
1550 |
flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
1551 |
/* Ignore direct disk access hint until the server supports it. */
|
1552 |
flags &= ~O_DIRECT; |
1553 |
} else {
|
1554 |
flags = omode_to_uflags(mode); |
1555 |
} |
1556 |
err = v9fs_co_open(s, fidp, flags); |
1557 |
if (err < 0) { |
1558 |
goto out;
|
1559 |
} |
1560 |
fidp->fid_type = P9_FID_FILE; |
1561 |
fidp->open_flags = flags; |
1562 |
if (flags & O_EXCL) {
|
1563 |
/*
|
1564 |
* We let the host file system do O_EXCL check
|
1565 |
* We should not reclaim such fd
|
1566 |
*/
|
1567 |
fidp->flags |= FID_NON_RECLAIMABLE; |
1568 |
} |
1569 |
iounit = get_iounit(s, &fidp->path); |
1570 |
offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit);
|
1571 |
err = offset; |
1572 |
} |
1573 |
out:
|
1574 |
put_fid(s, fidp); |
1575 |
out_nofid:
|
1576 |
complete_pdu(s, pdu, err); |
1577 |
} |
1578 |
|
1579 |
static void v9fs_lcreate(void *opaque) |
1580 |
{ |
1581 |
int32_t dfid, flags, mode; |
1582 |
gid_t gid; |
1583 |
ssize_t err = 0;
|
1584 |
ssize_t offset = 7;
|
1585 |
V9fsString fullname; |
1586 |
V9fsString name; |
1587 |
V9fsFidState *fidp; |
1588 |
struct stat stbuf;
|
1589 |
V9fsQID qid; |
1590 |
int32_t iounit; |
1591 |
V9fsPDU *pdu = opaque; |
1592 |
|
1593 |
v9fs_string_init(&fullname); |
1594 |
pdu_unmarshal(pdu, offset, "dsddd", &dfid, &name, &flags,
|
1595 |
&mode, &gid); |
1596 |
|
1597 |
fidp = get_fid(pdu->s, dfid); |
1598 |
if (fidp == NULL) { |
1599 |
err = -ENOENT; |
1600 |
goto out_nofid;
|
1601 |
} |
1602 |
v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
|
1603 |
|
1604 |
/* Ignore direct disk access hint until the server supports it. */
|
1605 |
flags &= ~O_DIRECT; |
1606 |
|
1607 |
err = v9fs_co_open2(pdu->s, fidp, fullname.data, gid, flags, mode); |
1608 |
if (err < 0) { |
1609 |
goto out;
|
1610 |
} |
1611 |
fidp->fid_type = P9_FID_FILE; |
1612 |
fidp->open_flags = flags; |
1613 |
if (flags & O_EXCL) {
|
1614 |
/*
|
1615 |
* We let the host file system do O_EXCL check
|
1616 |
* We should not reclaim such fd
|
1617 |
*/
|
1618 |
fidp->flags |= FID_NON_RECLAIMABLE; |
1619 |
} |
1620 |
iounit = get_iounit(pdu->s, &fullname); |
1621 |
|
1622 |
err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); |
1623 |
if (err < 0) { |
1624 |
fidp->fid_type = P9_FID_NONE; |
1625 |
if (fidp->fs.fd > 0) { |
1626 |
v9fs_co_close(pdu->s, fidp->fs.fd); |
1627 |
} |
1628 |
goto out;
|
1629 |
} |
1630 |
v9fs_string_copy(&fidp->path, &fullname); |
1631 |
stat_to_qid(&stbuf, &qid); |
1632 |
offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit);
|
1633 |
err = offset; |
1634 |
out:
|
1635 |
put_fid(pdu->s, fidp); |
1636 |
out_nofid:
|
1637 |
complete_pdu(pdu->s, pdu, err); |
1638 |
v9fs_string_free(&name); |
1639 |
v9fs_string_free(&fullname); |
1640 |
} |
1641 |
|
1642 |
static void v9fs_fsync(void *opaque) |
1643 |
{ |
1644 |
int err;
|
1645 |
int32_t fid; |
1646 |
int datasync;
|
1647 |
size_t offset = 7;
|
1648 |
V9fsFidState *fidp; |
1649 |
V9fsPDU *pdu = opaque; |
1650 |
V9fsState *s = pdu->s; |
1651 |
|
1652 |
pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
|
1653 |
fidp = get_fid(s, fid); |
1654 |
if (fidp == NULL) { |
1655 |
err = -ENOENT; |
1656 |
goto out_nofid;
|
1657 |
} |
1658 |
err = v9fs_co_fsync(s, fidp, datasync); |
1659 |
if (!err) {
|
1660 |
err = offset; |
1661 |
} |
1662 |
put_fid(s, fidp); |
1663 |
out_nofid:
|
1664 |
complete_pdu(s, pdu, err); |
1665 |
} |
1666 |
|
1667 |
static void v9fs_clunk(void *opaque) |
1668 |
{ |
1669 |
int err;
|
1670 |
int32_t fid; |
1671 |
size_t offset = 7;
|
1672 |
V9fsFidState *fidp; |
1673 |
V9fsPDU *pdu = opaque; |
1674 |
V9fsState *s = pdu->s; |
1675 |
|
1676 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
1677 |
|
1678 |
fidp = get_fid(s, fid); |
1679 |
if (fidp == NULL) { |
1680 |
err = -ENOENT; |
1681 |
goto out_nofid;
|
1682 |
} |
1683 |
err = clunk_fid(s, fidp->fid); |
1684 |
if (err < 0) { |
1685 |
goto out;
|
1686 |
} |
1687 |
err = offset; |
1688 |
out:
|
1689 |
put_fid(s, fidp); |
1690 |
out_nofid:
|
1691 |
complete_pdu(s, pdu, err); |
1692 |
} |
1693 |
|
1694 |
static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, |
1695 |
V9fsFidState *fidp, int64_t off, int32_t max_count) |
1696 |
{ |
1697 |
size_t offset = 7;
|
1698 |
int read_count;
|
1699 |
int64_t xattr_len; |
1700 |
|
1701 |
xattr_len = fidp->fs.xattr.len; |
1702 |
read_count = xattr_len - off; |
1703 |
if (read_count > max_count) {
|
1704 |
read_count = max_count; |
1705 |
} else if (read_count < 0) { |
1706 |
/*
|
1707 |
* read beyond XATTR value
|
1708 |
*/
|
1709 |
read_count = 0;
|
1710 |
} |
1711 |
offset += pdu_marshal(pdu, offset, "d", read_count);
|
1712 |
offset += pdu_pack(pdu, offset, |
1713 |
((char *)fidp->fs.xattr.value) + off,
|
1714 |
read_count); |
1715 |
return offset;
|
1716 |
} |
1717 |
|
1718 |
static int v9fs_do_readdir_with_stat(V9fsState *s, V9fsPDU *pdu, |
1719 |
V9fsFidState *fidp, int32_t max_count) |
1720 |
{ |
1721 |
V9fsString name; |
1722 |
V9fsStat v9stat; |
1723 |
int len, err = 0; |
1724 |
int32_t count = 0;
|
1725 |
struct stat stbuf;
|
1726 |
off_t saved_dir_pos; |
1727 |
struct dirent *dent, *result;
|
1728 |
|
1729 |
/* save the directory position */
|
1730 |
saved_dir_pos = v9fs_co_telldir(s, fidp); |
1731 |
if (saved_dir_pos < 0) { |
1732 |
return saved_dir_pos;
|
1733 |
} |
1734 |
|
1735 |
dent = g_malloc(sizeof(struct dirent)); |
1736 |
|
1737 |
while (1) { |
1738 |
v9fs_string_init(&name); |
1739 |
err = v9fs_co_readdir_r(s, fidp, dent, &result); |
1740 |
if (err || !result) {
|
1741 |
break;
|
1742 |
} |
1743 |
v9fs_string_sprintf(&name, "%s/%s", fidp->path.data, dent->d_name);
|
1744 |
err = v9fs_co_lstat(s, &name, &stbuf); |
1745 |
if (err < 0) { |
1746 |
goto out;
|
1747 |
} |
1748 |
err = stat_to_v9stat(s, &name, &stbuf, &v9stat); |
1749 |
if (err < 0) { |
1750 |
goto out;
|
1751 |
} |
1752 |
/* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
|
1753 |
len = pdu_marshal(pdu, 11 + count, "S", &v9stat); |
1754 |
if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) { |
1755 |
/* Ran out of buffer. Set dir back to old position and return */
|
1756 |
v9fs_co_seekdir(s, fidp, saved_dir_pos); |
1757 |
v9fs_stat_free(&v9stat); |
1758 |
v9fs_string_free(&name); |
1759 |
g_free(dent); |
1760 |
return count;
|
1761 |
} |
1762 |
count += len; |
1763 |
v9fs_stat_free(&v9stat); |
1764 |
v9fs_string_free(&name); |
1765 |
saved_dir_pos = dent->d_off; |
1766 |
} |
1767 |
out:
|
1768 |
g_free(dent); |
1769 |
v9fs_string_free(&name); |
1770 |
if (err < 0) { |
1771 |
return err;
|
1772 |
} |
1773 |
return count;
|
1774 |
} |
1775 |
|
1776 |
static void v9fs_read(void *opaque) |
1777 |
{ |
1778 |
int32_t fid; |
1779 |
int64_t off; |
1780 |
ssize_t err = 0;
|
1781 |
int32_t count = 0;
|
1782 |
size_t offset = 7;
|
1783 |
int32_t max_count; |
1784 |
V9fsFidState *fidp; |
1785 |
V9fsPDU *pdu = opaque; |
1786 |
V9fsState *s = pdu->s; |
1787 |
|
1788 |
pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count);
|
1789 |
|
1790 |
fidp = get_fid(s, fid); |
1791 |
if (fidp == NULL) { |
1792 |
err = -EINVAL; |
1793 |
goto out_nofid;
|
1794 |
} |
1795 |
if (fidp->fid_type == P9_FID_DIR) {
|
1796 |
|
1797 |
if (off == 0) { |
1798 |
v9fs_co_rewinddir(s, fidp); |
1799 |
} |
1800 |
count = v9fs_do_readdir_with_stat(s, pdu, fidp, max_count); |
1801 |
if (count < 0) { |
1802 |
err = count; |
1803 |
goto out;
|
1804 |
} |
1805 |
err = offset; |
1806 |
err += pdu_marshal(pdu, offset, "d", count);
|
1807 |
err += count; |
1808 |
} else if (fidp->fid_type == P9_FID_FILE) { |
1809 |
int32_t cnt; |
1810 |
int32_t len; |
1811 |
struct iovec *sg;
|
1812 |
struct iovec iov[128]; /* FIXME: bad, bad, bad */ |
1813 |
|
1814 |
sg = iov; |
1815 |
pdu_marshal(pdu, offset + 4, "v", sg, &cnt); |
1816 |
sg = cap_sg(sg, max_count, &cnt); |
1817 |
do {
|
1818 |
if (0) { |
1819 |
print_sg(sg, cnt); |
1820 |
} |
1821 |
/* Loop in case of EINTR */
|
1822 |
do {
|
1823 |
len = v9fs_co_preadv(s, fidp, sg, cnt, off); |
1824 |
if (len >= 0) { |
1825 |
off += len; |
1826 |
count += len; |
1827 |
} |
1828 |
} while (len == -EINTR);
|
1829 |
if (len < 0) { |
1830 |
/* IO error return the error */
|
1831 |
err = len; |
1832 |
goto out;
|
1833 |
} |
1834 |
sg = adjust_sg(sg, len, &cnt); |
1835 |
} while (count < max_count && len > 0); |
1836 |
err = offset; |
1837 |
err += pdu_marshal(pdu, offset, "d", count);
|
1838 |
err += count; |
1839 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
1840 |
err = v9fs_xattr_read(s, pdu, fidp, off, max_count); |
1841 |
} else {
|
1842 |
err = -EINVAL; |
1843 |
} |
1844 |
out:
|
1845 |
put_fid(s, fidp); |
1846 |
out_nofid:
|
1847 |
complete_pdu(s, pdu, err); |
1848 |
} |
1849 |
|
1850 |
static size_t v9fs_readdir_data_size(V9fsString *name)
|
1851 |
{ |
1852 |
/*
|
1853 |
* Size of each dirent on the wire: size of qid (13) + size of offset (8)
|
1854 |
* size of type (1) + size of name.size (2) + strlen(name.data)
|
1855 |
*/
|
1856 |
return 24 + v9fs_string_size(name); |
1857 |
} |
1858 |
|
1859 |
static int v9fs_do_readdir(V9fsState *s, V9fsPDU *pdu, |
1860 |
V9fsFidState *fidp, int32_t max_count) |
1861 |
{ |
1862 |
size_t size; |
1863 |
V9fsQID qid; |
1864 |
V9fsString name; |
1865 |
int len, err = 0; |
1866 |
int32_t count = 0;
|
1867 |
off_t saved_dir_pos; |
1868 |
struct dirent *dent, *result;
|
1869 |
|
1870 |
/* save the directory position */
|
1871 |
saved_dir_pos = v9fs_co_telldir(s, fidp); |
1872 |
if (saved_dir_pos < 0) { |
1873 |
return saved_dir_pos;
|
1874 |
} |
1875 |
|
1876 |
dent = g_malloc(sizeof(struct dirent)); |
1877 |
|
1878 |
while (1) { |
1879 |
err = v9fs_co_readdir_r(s, fidp, dent, &result); |
1880 |
if (err || !result) {
|
1881 |
break;
|
1882 |
} |
1883 |
v9fs_string_init(&name); |
1884 |
v9fs_string_sprintf(&name, "%s", dent->d_name);
|
1885 |
if ((count + v9fs_readdir_data_size(&name)) > max_count) {
|
1886 |
/* Ran out of buffer. Set dir back to old position and return */
|
1887 |
v9fs_co_seekdir(s, fidp, saved_dir_pos); |
1888 |
v9fs_string_free(&name); |
1889 |
g_free(dent); |
1890 |
return count;
|
1891 |
} |
1892 |
/*
|
1893 |
* Fill up just the path field of qid because the client uses
|
1894 |
* only that. To fill the entire qid structure we will have
|
1895 |
* to stat each dirent found, which is expensive
|
1896 |
*/
|
1897 |
size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); |
1898 |
memcpy(&qid.path, &dent->d_ino, size); |
1899 |
/* Fill the other fields with dummy values */
|
1900 |
qid.type = 0;
|
1901 |
qid.version = 0;
|
1902 |
|
1903 |
/* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
|
1904 |
len = pdu_marshal(pdu, 11 + count, "Qqbs", |
1905 |
&qid, dent->d_off, |
1906 |
dent->d_type, &name); |
1907 |
count += len; |
1908 |
v9fs_string_free(&name); |
1909 |
saved_dir_pos = dent->d_off; |
1910 |
} |
1911 |
g_free(dent); |
1912 |
if (err < 0) { |
1913 |
return err;
|
1914 |
} |
1915 |
return count;
|
1916 |
} |
1917 |
|
1918 |
static void v9fs_readdir(void *opaque) |
1919 |
{ |
1920 |
int32_t fid; |
1921 |
V9fsFidState *fidp; |
1922 |
ssize_t retval = 0;
|
1923 |
size_t offset = 7;
|
1924 |
int64_t initial_offset; |
1925 |
int32_t count, max_count; |
1926 |
V9fsPDU *pdu = opaque; |
1927 |
V9fsState *s = pdu->s; |
1928 |
|
1929 |
pdu_unmarshal(pdu, offset, "dqd", &fid, &initial_offset, &max_count);
|
1930 |
|
1931 |
fidp = get_fid(s, fid); |
1932 |
if (fidp == NULL) { |
1933 |
retval = -EINVAL; |
1934 |
goto out_nofid;
|
1935 |
} |
1936 |
if (!fidp->fs.dir) {
|
1937 |
retval = -EINVAL; |
1938 |
goto out;
|
1939 |
} |
1940 |
if (initial_offset == 0) { |
1941 |
v9fs_co_rewinddir(s, fidp); |
1942 |
} else {
|
1943 |
v9fs_co_seekdir(s, fidp, initial_offset); |
1944 |
} |
1945 |
count = v9fs_do_readdir(s, pdu, fidp, max_count); |
1946 |
if (count < 0) { |
1947 |
retval = count; |
1948 |
goto out;
|
1949 |
} |
1950 |
retval = offset; |
1951 |
retval += pdu_marshal(pdu, offset, "d", count);
|
1952 |
retval += count; |
1953 |
out:
|
1954 |
put_fid(s, fidp); |
1955 |
out_nofid:
|
1956 |
complete_pdu(s, pdu, retval); |
1957 |
} |
1958 |
|
1959 |
static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
1960 |
int64_t off, int32_t count, |
1961 |
struct iovec *sg, int cnt) |
1962 |
{ |
1963 |
int i, to_copy;
|
1964 |
ssize_t err = 0;
|
1965 |
int write_count;
|
1966 |
int64_t xattr_len; |
1967 |
size_t offset = 7;
|
1968 |
|
1969 |
|
1970 |
xattr_len = fidp->fs.xattr.len; |
1971 |
write_count = xattr_len - off; |
1972 |
if (write_count > count) {
|
1973 |
write_count = count; |
1974 |
} else if (write_count < 0) { |
1975 |
/*
|
1976 |
* write beyond XATTR value len specified in
|
1977 |
* xattrcreate
|
1978 |
*/
|
1979 |
err = -ENOSPC; |
1980 |
goto out;
|
1981 |
} |
1982 |
offset += pdu_marshal(pdu, offset, "d", write_count);
|
1983 |
err = offset; |
1984 |
fidp->fs.xattr.copied_len += write_count; |
1985 |
/*
|
1986 |
* Now copy the content from sg list
|
1987 |
*/
|
1988 |
for (i = 0; i < cnt; i++) { |
1989 |
if (write_count > sg[i].iov_len) {
|
1990 |
to_copy = sg[i].iov_len; |
1991 |
} else {
|
1992 |
to_copy = write_count; |
1993 |
} |
1994 |
memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy);
|
1995 |
/* updating vs->off since we are not using below */
|
1996 |
off += to_copy; |
1997 |
write_count -= to_copy; |
1998 |
} |
1999 |
out:
|
2000 |
return err;
|
2001 |
} |
2002 |
|
2003 |
static void v9fs_write(void *opaque) |
2004 |
{ |
2005 |
int cnt;
|
2006 |
ssize_t err; |
2007 |
int32_t fid; |
2008 |
int64_t off; |
2009 |
int32_t count; |
2010 |
int32_t len = 0;
|
2011 |
int32_t total = 0;
|
2012 |
size_t offset = 7;
|
2013 |
V9fsFidState *fidp; |
2014 |
struct iovec iov[128]; /* FIXME: bad, bad, bad */ |
2015 |
struct iovec *sg = iov;
|
2016 |
V9fsPDU *pdu = opaque; |
2017 |
V9fsState *s = pdu->s; |
2018 |
|
2019 |
pdu_unmarshal(pdu, offset, "dqdv", &fid, &off, &count, sg, &cnt);
|
2020 |
|
2021 |
fidp = get_fid(s, fid); |
2022 |
if (fidp == NULL) { |
2023 |
err = -EINVAL; |
2024 |
goto out_nofid;
|
2025 |
} |
2026 |
if (fidp->fid_type == P9_FID_FILE) {
|
2027 |
if (fidp->fs.fd == -1) { |
2028 |
err = -EINVAL; |
2029 |
goto out;
|
2030 |
} |
2031 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
2032 |
/*
|
2033 |
* setxattr operation
|
2034 |
*/
|
2035 |
err = v9fs_xattr_write(s, pdu, fidp, off, count, sg, cnt); |
2036 |
goto out;
|
2037 |
} else {
|
2038 |
err = -EINVAL; |
2039 |
goto out;
|
2040 |
} |
2041 |
sg = cap_sg(sg, count, &cnt); |
2042 |
do {
|
2043 |
if (0) { |
2044 |
print_sg(sg, cnt); |
2045 |
} |
2046 |
/* Loop in case of EINTR */
|
2047 |
do {
|
2048 |
len = v9fs_co_pwritev(s, fidp, sg, cnt, off); |
2049 |
if (len >= 0) { |
2050 |
off += len; |
2051 |
total += len; |
2052 |
} |
2053 |
} while (len == -EINTR);
|
2054 |
if (len < 0) { |
2055 |
/* IO error return the error */
|
2056 |
err = len; |
2057 |
goto out;
|
2058 |
} |
2059 |
sg = adjust_sg(sg, len, &cnt); |
2060 |
} while (total < count && len > 0); |
2061 |
offset += pdu_marshal(pdu, offset, "d", total);
|
2062 |
err = offset; |
2063 |
out:
|
2064 |
put_fid(s, fidp); |
2065 |
out_nofid:
|
2066 |
complete_pdu(s, pdu, err); |
2067 |
} |
2068 |
|
2069 |
static void v9fs_create(void *opaque) |
2070 |
{ |
2071 |
int32_t fid; |
2072 |
int err = 0; |
2073 |
size_t offset = 7;
|
2074 |
V9fsFidState *fidp; |
2075 |
V9fsQID qid; |
2076 |
int32_t perm; |
2077 |
int8_t mode; |
2078 |
struct stat stbuf;
|
2079 |
V9fsString name; |
2080 |
V9fsString extension; |
2081 |
V9fsString fullname; |
2082 |
int iounit;
|
2083 |
V9fsPDU *pdu = opaque; |
2084 |
|
2085 |
v9fs_string_init(&fullname); |
2086 |
|
2087 |
pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name,
|
2088 |
&perm, &mode, &extension); |
2089 |
|
2090 |
fidp = get_fid(pdu->s, fid); |
2091 |
if (fidp == NULL) { |
2092 |
err = -EINVAL; |
2093 |
goto out_nofid;
|
2094 |
} |
2095 |
|
2096 |
v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
|
2097 |
err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); |
2098 |
if (!err) {
|
2099 |
err = -EEXIST; |
2100 |
goto out;
|
2101 |
} else if (err != -ENOENT) { |
2102 |
goto out;
|
2103 |
} |
2104 |
if (perm & P9_STAT_MODE_DIR) {
|
2105 |
err = v9fs_co_mkdir(pdu->s, fullname.data, perm & 0777,
|
2106 |
fidp->uid, -1);
|
2107 |
if (err < 0) { |
2108 |
goto out;
|
2109 |
} |
2110 |
v9fs_string_copy(&fidp->path, &fullname); |
2111 |
err = v9fs_co_opendir(pdu->s, fidp); |
2112 |
if (err < 0) { |
2113 |
goto out;
|
2114 |
} |
2115 |
fidp->fid_type = P9_FID_DIR; |
2116 |
} else if (perm & P9_STAT_MODE_SYMLINK) { |
2117 |
err = v9fs_co_symlink(pdu->s, fidp, extension.data, |
2118 |
fullname.data, -1);
|
2119 |
if (err < 0) { |
2120 |
goto out;
|
2121 |
} |
2122 |
} else if (perm & P9_STAT_MODE_LINK) { |
2123 |
int32_t nfid = atoi(extension.data); |
2124 |
V9fsFidState *nfidp = get_fid(pdu->s, nfid); |
2125 |
if (nfidp == NULL) { |
2126 |
err = -EINVAL; |
2127 |
goto out;
|
2128 |
} |
2129 |
err = v9fs_co_link(pdu->s, &nfidp->path, &fullname); |
2130 |
if (err < 0) { |
2131 |
put_fid(pdu->s, nfidp); |
2132 |
goto out;
|
2133 |
} |
2134 |
put_fid(pdu->s, nfidp); |
2135 |
} else if (perm & P9_STAT_MODE_DEVICE) { |
2136 |
char ctype;
|
2137 |
uint32_t major, minor; |
2138 |
mode_t nmode = 0;
|
2139 |
|
2140 |
if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { |
2141 |
err = -errno; |
2142 |
goto out;
|
2143 |
} |
2144 |
|
2145 |
switch (ctype) {
|
2146 |
case 'c': |
2147 |
nmode = S_IFCHR; |
2148 |
break;
|
2149 |
case 'b': |
2150 |
nmode = S_IFBLK; |
2151 |
break;
|
2152 |
default:
|
2153 |
err = -EIO; |
2154 |
goto out;
|
2155 |
} |
2156 |
|
2157 |
nmode |= perm & 0777;
|
2158 |
err = v9fs_co_mknod(pdu->s, &fullname, fidp->uid, -1,
|
2159 |
makedev(major, minor), nmode); |
2160 |
if (err < 0) { |
2161 |
goto out;
|
2162 |
} |
2163 |
} else if (perm & P9_STAT_MODE_NAMED_PIPE) { |
2164 |
err = v9fs_co_mknod(pdu->s, &fullname, fidp->uid, -1,
|
2165 |
0, S_IFIFO | (perm & 0777)); |
2166 |
if (err < 0) { |
2167 |
goto out;
|
2168 |
} |
2169 |
} else if (perm & P9_STAT_MODE_SOCKET) { |
2170 |
err = v9fs_co_mknod(pdu->s, &fullname, fidp->uid, -1,
|
2171 |
0, S_IFSOCK | (perm & 0777)); |
2172 |
if (err < 0) { |
2173 |
goto out;
|
2174 |
} |
2175 |
} else {
|
2176 |
err = v9fs_co_open2(pdu->s, fidp, fullname.data, -1,
|
2177 |
omode_to_uflags(mode)|O_CREAT, perm); |
2178 |
if (err < 0) { |
2179 |
goto out;
|
2180 |
} |
2181 |
fidp->fid_type = P9_FID_FILE; |
2182 |
fidp->open_flags = omode_to_uflags(mode); |
2183 |
if (fidp->open_flags & O_EXCL) {
|
2184 |
/*
|
2185 |
* We let the host file system do O_EXCL check
|
2186 |
* We should not reclaim such fd
|
2187 |
*/
|
2188 |
fidp->flags |= FID_NON_RECLAIMABLE; |
2189 |
} |
2190 |
} |
2191 |
err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); |
2192 |
if (err < 0) { |
2193 |
fidp->fid_type = P9_FID_NONE; |
2194 |
if (fidp->fs.fd) {
|
2195 |
v9fs_co_close(pdu->s, fidp->fs.fd); |
2196 |
} |
2197 |
goto out;
|
2198 |
} |
2199 |
iounit = get_iounit(pdu->s, &fidp->path); |
2200 |
v9fs_string_copy(&fidp->path, &fullname); |
2201 |
stat_to_qid(&stbuf, &qid); |
2202 |
offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit);
|
2203 |
err = offset; |
2204 |
out:
|
2205 |
put_fid(pdu->s, fidp); |
2206 |
out_nofid:
|
2207 |
complete_pdu(pdu->s, pdu, err); |
2208 |
v9fs_string_free(&name); |
2209 |
v9fs_string_free(&extension); |
2210 |
v9fs_string_free(&fullname); |
2211 |
} |
2212 |
|
2213 |
static void v9fs_symlink(void *opaque) |
2214 |
{ |
2215 |
V9fsPDU *pdu = opaque; |
2216 |
V9fsString name; |
2217 |
V9fsString symname; |
2218 |
V9fsString fullname; |
2219 |
V9fsFidState *dfidp; |
2220 |
V9fsQID qid; |
2221 |
struct stat stbuf;
|
2222 |
int32_t dfid; |
2223 |
int err = 0; |
2224 |
gid_t gid; |
2225 |
size_t offset = 7;
|
2226 |
|
2227 |
v9fs_string_init(&fullname); |
2228 |
pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid);
|
2229 |
|
2230 |
dfidp = get_fid(pdu->s, dfid); |
2231 |
if (dfidp == NULL) { |
2232 |
err = -EINVAL; |
2233 |
goto out_nofid;
|
2234 |
} |
2235 |
|
2236 |
v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
|
2237 |
err = v9fs_co_symlink(pdu->s, dfidp, symname.data, fullname.data, gid); |
2238 |
if (err < 0) { |
2239 |
goto out;
|
2240 |
} |
2241 |
err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); |
2242 |
if (err < 0) { |
2243 |
goto out;
|
2244 |
} |
2245 |
stat_to_qid(&stbuf, &qid); |
2246 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
2247 |
err = offset; |
2248 |
out:
|
2249 |
put_fid(pdu->s, dfidp); |
2250 |
out_nofid:
|
2251 |
complete_pdu(pdu->s, pdu, err); |
2252 |
v9fs_string_free(&name); |
2253 |
v9fs_string_free(&symname); |
2254 |
v9fs_string_free(&fullname); |
2255 |
} |
2256 |
|
2257 |
static void v9fs_flush(void *opaque) |
2258 |
{ |
2259 |
V9fsPDU *pdu = opaque; |
2260 |
V9fsState *s = pdu->s; |
2261 |
/* A nop call with no return */
|
2262 |
complete_pdu(s, pdu, 7);
|
2263 |
return;
|
2264 |
} |
2265 |
|
2266 |
static void v9fs_link(void *opaque) |
2267 |
{ |
2268 |
V9fsPDU *pdu = opaque; |
2269 |
V9fsState *s = pdu->s; |
2270 |
int32_t dfid, oldfid; |
2271 |
V9fsFidState *dfidp, *oldfidp; |
2272 |
V9fsString name, fullname; |
2273 |
size_t offset = 7;
|
2274 |
int err = 0; |
2275 |
|
2276 |
v9fs_string_init(&fullname); |
2277 |
|
2278 |
pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
|
2279 |
|
2280 |
dfidp = get_fid(s, dfid); |
2281 |
if (dfidp == NULL) { |
2282 |
err = -ENOENT; |
2283 |
goto out_nofid;
|
2284 |
} |
2285 |
|
2286 |
oldfidp = get_fid(s, oldfid); |
2287 |
if (oldfidp == NULL) { |
2288 |
err = -ENOENT; |
2289 |
goto out;
|
2290 |
} |
2291 |
|
2292 |
v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
|
2293 |
err = v9fs_co_link(s, &oldfidp->path, &fullname); |
2294 |
if (!err) {
|
2295 |
err = offset; |
2296 |
} |
2297 |
v9fs_string_free(&fullname); |
2298 |
|
2299 |
out:
|
2300 |
put_fid(s, dfidp); |
2301 |
out_nofid:
|
2302 |
v9fs_string_free(&name); |
2303 |
complete_pdu(s, pdu, err); |
2304 |
} |
2305 |
|
2306 |
static void v9fs_remove(void *opaque) |
2307 |
{ |
2308 |
int32_t fid; |
2309 |
int err = 0; |
2310 |
size_t offset = 7;
|
2311 |
V9fsFidState *fidp; |
2312 |
V9fsPDU *pdu = opaque; |
2313 |
|
2314 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
2315 |
|
2316 |
fidp = get_fid(pdu->s, fid); |
2317 |
if (fidp == NULL) { |
2318 |
err = -EINVAL; |
2319 |
goto out_nofid;
|
2320 |
} |
2321 |
/*
|
2322 |
* IF the file is unlinked, we cannot reopen
|
2323 |
* the file later. So don't reclaim fd
|
2324 |
*/
|
2325 |
err = v9fs_mark_fids_unreclaim(pdu->s, &fidp->path); |
2326 |
if (err < 0) { |
2327 |
goto out_err;
|
2328 |
} |
2329 |
err = v9fs_co_remove(pdu->s, &fidp->path); |
2330 |
if (!err) {
|
2331 |
err = offset; |
2332 |
} |
2333 |
out_err:
|
2334 |
/* For TREMOVE we need to clunk the fid even on failed remove */
|
2335 |
clunk_fid(pdu->s, fidp->fid); |
2336 |
put_fid(pdu->s, fidp); |
2337 |
out_nofid:
|
2338 |
complete_pdu(pdu->s, pdu, err); |
2339 |
} |
2340 |
|
2341 |
static void v9fs_unlinkat(void *opaque) |
2342 |
{ |
2343 |
int err = 0; |
2344 |
V9fsString name; |
2345 |
int32_t dfid, flags; |
2346 |
size_t offset = 7;
|
2347 |
V9fsFidState *dfidp; |
2348 |
V9fsPDU *pdu = opaque; |
2349 |
V9fsString full_name; |
2350 |
|
2351 |
pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags);
|
2352 |
|
2353 |
dfidp = get_fid(pdu->s, dfid); |
2354 |
if (dfidp == NULL) { |
2355 |
err = -EINVAL; |
2356 |
goto out_nofid;
|
2357 |
} |
2358 |
v9fs_string_init(&full_name); |
2359 |
v9fs_string_sprintf(&full_name, "%s/%s", dfidp->path.data, name.data);
|
2360 |
/*
|
2361 |
* IF the file is unlinked, we cannot reopen
|
2362 |
* the file later. So don't reclaim fd
|
2363 |
*/
|
2364 |
err = v9fs_mark_fids_unreclaim(pdu->s, &full_name); |
2365 |
if (err < 0) { |
2366 |
goto out_err;
|
2367 |
} |
2368 |
err = v9fs_co_remove(pdu->s, &full_name); |
2369 |
if (!err) {
|
2370 |
err = offset; |
2371 |
} |
2372 |
out_err:
|
2373 |
put_fid(pdu->s, dfidp); |
2374 |
v9fs_string_free(&full_name); |
2375 |
out_nofid:
|
2376 |
complete_pdu(pdu->s, pdu, err); |
2377 |
v9fs_string_free(&name); |
2378 |
} |
2379 |
|
2380 |
static int v9fs_complete_rename(V9fsState *s, V9fsFidState *fidp, |
2381 |
int32_t newdirfid, V9fsString *name) |
2382 |
{ |
2383 |
char *end;
|
2384 |
int err = 0; |
2385 |
V9fsFidState *dirfidp = NULL;
|
2386 |
char *old_name, *new_name;
|
2387 |
|
2388 |
if (newdirfid != -1) { |
2389 |
dirfidp = get_fid(s, newdirfid); |
2390 |
if (dirfidp == NULL) { |
2391 |
err = -ENOENT; |
2392 |
goto out_nofid;
|
2393 |
} |
2394 |
BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
2395 |
|
2396 |
new_name = g_malloc0(dirfidp->path.size + name->size + 2);
|
2397 |
|
2398 |
strcpy(new_name, dirfidp->path.data); |
2399 |
strcat(new_name, "/");
|
2400 |
strcat(new_name + dirfidp->path.size, name->data); |
2401 |
} else {
|
2402 |
old_name = fidp->path.data; |
2403 |
end = strrchr(old_name, '/');
|
2404 |
if (end) {
|
2405 |
end++; |
2406 |
} else {
|
2407 |
end = old_name; |
2408 |
} |
2409 |
new_name = g_malloc0(end - old_name + name->size + 1);
|
2410 |
|
2411 |
strncat(new_name, old_name, end - old_name); |
2412 |
strncat(new_name + (end - old_name), name->data, name->size); |
2413 |
} |
2414 |
|
2415 |
v9fs_string_free(name); |
2416 |
name->data = new_name; |
2417 |
name->size = strlen(new_name); |
2418 |
|
2419 |
if (strcmp(new_name, fidp->path.data) != 0) { |
2420 |
err = v9fs_co_rename(s, &fidp->path, name); |
2421 |
if (err < 0) { |
2422 |
goto out;
|
2423 |
} |
2424 |
V9fsFidState *tfidp; |
2425 |
/*
|
2426 |
* Fixup fid's pointing to the old name to
|
2427 |
* start pointing to the new name
|
2428 |
*/
|
2429 |
for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) {
|
2430 |
if (fidp == tfidp) {
|
2431 |
/*
|
2432 |
* we replace name of this fid towards the end
|
2433 |
* so that our below strcmp will work
|
2434 |
*/
|
2435 |
continue;
|
2436 |
} |
2437 |
if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) {
|
2438 |
/* replace the name */
|
2439 |
v9fs_fix_path(&tfidp->path, name, strlen(fidp->path.data)); |
2440 |
} |
2441 |
} |
2442 |
v9fs_string_copy(&fidp->path, name); |
2443 |
} |
2444 |
out:
|
2445 |
if (dirfidp) {
|
2446 |
put_fid(s, dirfidp); |
2447 |
} |
2448 |
out_nofid:
|
2449 |
return err;
|
2450 |
} |
2451 |
|
2452 |
static void v9fs_rename(void *opaque) |
2453 |
{ |
2454 |
int32_t fid; |
2455 |
ssize_t err = 0;
|
2456 |
size_t offset = 7;
|
2457 |
V9fsString name; |
2458 |
int32_t newdirfid; |
2459 |
V9fsFidState *fidp; |
2460 |
V9fsPDU *pdu = opaque; |
2461 |
V9fsState *s = pdu->s; |
2462 |
|
2463 |
pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name);
|
2464 |
|
2465 |
fidp = get_fid(s, fid); |
2466 |
if (fidp == NULL) { |
2467 |
err = -ENOENT; |
2468 |
goto out_nofid;
|
2469 |
} |
2470 |
BUG_ON(fidp->fid_type != P9_FID_NONE); |
2471 |
|
2472 |
err = v9fs_complete_rename(s, fidp, newdirfid, &name); |
2473 |
if (!err) {
|
2474 |
err = offset; |
2475 |
} |
2476 |
put_fid(s, fidp); |
2477 |
out_nofid:
|
2478 |
complete_pdu(s, pdu, err); |
2479 |
v9fs_string_free(&name); |
2480 |
} |
2481 |
|
2482 |
static int v9fs_complete_renameat(V9fsState *s, int32_t olddirfid, |
2483 |
V9fsString *old_name, int32_t newdirfid, |
2484 |
V9fsString *new_name) |
2485 |
{ |
2486 |
int err = 0; |
2487 |
V9fsString old_full_name, new_full_name; |
2488 |
V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; |
2489 |
|
2490 |
olddirfidp = get_fid(s, olddirfid); |
2491 |
if (olddirfidp == NULL) { |
2492 |
err = -ENOENT; |
2493 |
goto out;
|
2494 |
} |
2495 |
v9fs_string_init(&old_full_name); |
2496 |
v9fs_string_init(&new_full_name); |
2497 |
|
2498 |
v9fs_string_sprintf(&old_full_name, "%s/%s",
|
2499 |
olddirfidp->path.data, old_name->data); |
2500 |
if (newdirfid != -1) { |
2501 |
newdirfidp = get_fid(s, newdirfid); |
2502 |
if (newdirfidp == NULL) { |
2503 |
err = -ENOENT; |
2504 |
goto out;
|
2505 |
} |
2506 |
v9fs_string_sprintf(&new_full_name, "%s/%s",
|
2507 |
newdirfidp->path.data, new_name->data); |
2508 |
} else {
|
2509 |
v9fs_string_sprintf(&new_full_name, "%s/%s",
|
2510 |
olddirfidp->path.data, new_name->data); |
2511 |
} |
2512 |
|
2513 |
if (strcmp(old_full_name.data, new_full_name.data) != 0) { |
2514 |
V9fsFidState *tfidp; |
2515 |
err = v9fs_co_rename(s, &old_full_name, &new_full_name); |
2516 |
if (err < 0) { |
2517 |
goto out;
|
2518 |
} |
2519 |
/*
|
2520 |
* Fixup fid's pointing to the old name to
|
2521 |
* start pointing to the new name
|
2522 |
*/
|
2523 |
for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) {
|
2524 |
if (v9fs_path_is_ancestor(&old_full_name, &tfidp->path)) {
|
2525 |
/* replace the name */
|
2526 |
v9fs_fix_path(&tfidp->path, &new_full_name, old_full_name.size); |
2527 |
} |
2528 |
} |
2529 |
} |
2530 |
out:
|
2531 |
if (olddirfidp) {
|
2532 |
put_fid(s, olddirfidp); |
2533 |
} |
2534 |
if (newdirfidp) {
|
2535 |
put_fid(s, newdirfidp); |
2536 |
} |
2537 |
v9fs_string_free(&old_full_name); |
2538 |
v9fs_string_free(&new_full_name); |
2539 |
return err;
|
2540 |
} |
2541 |
|
2542 |
static void v9fs_renameat(void *opaque) |
2543 |
{ |
2544 |
ssize_t err = 0;
|
2545 |
size_t offset = 7;
|
2546 |
V9fsPDU *pdu = opaque; |
2547 |
V9fsState *s = pdu->s; |
2548 |
int32_t olddirfid, newdirfid; |
2549 |
V9fsString old_name, new_name; |
2550 |
|
2551 |
pdu_unmarshal(pdu, offset, "dsds", &olddirfid,
|
2552 |
&old_name, &newdirfid, &new_name); |
2553 |
|
2554 |
err = v9fs_complete_renameat(s, olddirfid, &old_name, newdirfid, &new_name); |
2555 |
if (!err) {
|
2556 |
err = offset; |
2557 |
} |
2558 |
complete_pdu(s, pdu, err); |
2559 |
v9fs_string_free(&old_name); |
2560 |
v9fs_string_free(&new_name); |
2561 |
} |
2562 |
|
2563 |
static void v9fs_wstat(void *opaque) |
2564 |
{ |
2565 |
int32_t fid; |
2566 |
int err = 0; |
2567 |
int16_t unused; |
2568 |
V9fsStat v9stat; |
2569 |
size_t offset = 7;
|
2570 |
struct stat stbuf;
|
2571 |
V9fsFidState *fidp; |
2572 |
V9fsPDU *pdu = opaque; |
2573 |
V9fsState *s = pdu->s; |
2574 |
|
2575 |
pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat);
|
2576 |
|
2577 |
fidp = get_fid(s, fid); |
2578 |
if (fidp == NULL) { |
2579 |
err = -EINVAL; |
2580 |
goto out_nofid;
|
2581 |
} |
2582 |
/* do we need to sync the file? */
|
2583 |
if (donttouch_stat(&v9stat)) {
|
2584 |
err = v9fs_co_fsync(s, fidp, 0);
|
2585 |
goto out;
|
2586 |
} |
2587 |
if (v9stat.mode != -1) { |
2588 |
uint32_t v9_mode; |
2589 |
err = v9fs_co_lstat(s, &fidp->path, &stbuf); |
2590 |
if (err < 0) { |
2591 |
goto out;
|
2592 |
} |
2593 |
v9_mode = stat_to_v9mode(&stbuf); |
2594 |
if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
2595 |
(v9_mode & P9_STAT_MODE_TYPE_BITS)) { |
2596 |
/* Attempting to change the type */
|
2597 |
err = -EIO; |
2598 |
goto out;
|
2599 |
} |
2600 |
err = v9fs_co_chmod(s, &fidp->path, |
2601 |
v9mode_to_mode(v9stat.mode, |
2602 |
&v9stat.extension)); |
2603 |
if (err < 0) { |
2604 |
goto out;
|
2605 |
} |
2606 |
} |
2607 |
if (v9stat.mtime != -1 || v9stat.atime != -1) { |
2608 |
struct timespec times[2]; |
2609 |
if (v9stat.atime != -1) { |
2610 |
times[0].tv_sec = v9stat.atime;
|
2611 |
times[0].tv_nsec = 0; |
2612 |
} else {
|
2613 |
times[0].tv_nsec = UTIME_OMIT;
|
2614 |
} |
2615 |
if (v9stat.mtime != -1) { |
2616 |
times[1].tv_sec = v9stat.mtime;
|
2617 |
times[1].tv_nsec = 0; |
2618 |
} else {
|
2619 |
times[1].tv_nsec = UTIME_OMIT;
|
2620 |
} |
2621 |
err = v9fs_co_utimensat(s, &fidp->path, times); |
2622 |
if (err < 0) { |
2623 |
goto out;
|
2624 |
} |
2625 |
} |
2626 |
if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { |
2627 |
err = v9fs_co_chown(s, &fidp->path, v9stat.n_uid, v9stat.n_gid); |
2628 |
if (err < 0) { |
2629 |
goto out;
|
2630 |
} |
2631 |
} |
2632 |
if (v9stat.name.size != 0) { |
2633 |
err = v9fs_complete_rename(s, fidp, -1, &v9stat.name);
|
2634 |
if (err < 0) { |
2635 |
goto out;
|
2636 |
} |
2637 |
} |
2638 |
if (v9stat.length != -1) { |
2639 |
err = v9fs_co_truncate(s, &fidp->path, v9stat.length); |
2640 |
if (err < 0) { |
2641 |
goto out;
|
2642 |
} |
2643 |
} |
2644 |
err = offset; |
2645 |
out:
|
2646 |
put_fid(s, fidp); |
2647 |
out_nofid:
|
2648 |
v9fs_stat_free(&v9stat); |
2649 |
complete_pdu(s, pdu, err); |
2650 |
} |
2651 |
|
2652 |
static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
2653 |
{ |
2654 |
uint32_t f_type; |
2655 |
uint32_t f_bsize; |
2656 |
uint64_t f_blocks; |
2657 |
uint64_t f_bfree; |
2658 |
uint64_t f_bavail; |
2659 |
uint64_t f_files; |
2660 |
uint64_t f_ffree; |
2661 |
uint64_t fsid_val; |
2662 |
uint32_t f_namelen; |
2663 |
size_t offset = 7;
|
2664 |
int32_t bsize_factor; |
2665 |
|
2666 |
/*
|
2667 |
* compute bsize factor based on host file system block size
|
2668 |
* and client msize
|
2669 |
*/
|
2670 |
bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
2671 |
if (!bsize_factor) {
|
2672 |
bsize_factor = 1;
|
2673 |
} |
2674 |
f_type = stbuf->f_type; |
2675 |
f_bsize = stbuf->f_bsize; |
2676 |
f_bsize *= bsize_factor; |
2677 |
/*
|
2678 |
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
|
2679 |
* adjust(divide) the number of blocks, free blocks and available
|
2680 |
* blocks by bsize factor
|
2681 |
*/
|
2682 |
f_blocks = stbuf->f_blocks/bsize_factor; |
2683 |
f_bfree = stbuf->f_bfree/bsize_factor; |
2684 |
f_bavail = stbuf->f_bavail/bsize_factor; |
2685 |
f_files = stbuf->f_files; |
2686 |
f_ffree = stbuf->f_ffree; |
2687 |
fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | |
2688 |
(unsigned long long)stbuf->f_fsid.__val[1] << 32; |
2689 |
f_namelen = stbuf->f_namelen; |
2690 |
|
2691 |
return pdu_marshal(pdu, offset, "ddqqqqqqd", |
2692 |
f_type, f_bsize, f_blocks, f_bfree, |
2693 |
f_bavail, f_files, f_ffree, |
2694 |
fsid_val, f_namelen); |
2695 |
} |
2696 |
|
2697 |
static void v9fs_statfs(void *opaque) |
2698 |
{ |
2699 |
int32_t fid; |
2700 |
ssize_t retval = 0;
|
2701 |
size_t offset = 7;
|
2702 |
V9fsFidState *fidp; |
2703 |
struct statfs stbuf;
|
2704 |
V9fsPDU *pdu = opaque; |
2705 |
V9fsState *s = pdu->s; |
2706 |
|
2707 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
2708 |
fidp = get_fid(s, fid); |
2709 |
if (fidp == NULL) { |
2710 |
retval = -ENOENT; |
2711 |
goto out_nofid;
|
2712 |
} |
2713 |
retval = v9fs_co_statfs(s, &fidp->path, &stbuf); |
2714 |
if (retval < 0) { |
2715 |
goto out;
|
2716 |
} |
2717 |
retval = offset; |
2718 |
retval += v9fs_fill_statfs(s, pdu, &stbuf); |
2719 |
out:
|
2720 |
put_fid(s, fidp); |
2721 |
out_nofid:
|
2722 |
complete_pdu(s, pdu, retval); |
2723 |
return;
|
2724 |
} |
2725 |
|
2726 |
static void v9fs_mknod(void *opaque) |
2727 |
{ |
2728 |
|
2729 |
int mode;
|
2730 |
gid_t gid; |
2731 |
int32_t fid; |
2732 |
V9fsQID qid; |
2733 |
int err = 0; |
2734 |
int major, minor;
|
2735 |
size_t offset = 7;
|
2736 |
V9fsString name; |
2737 |
struct stat stbuf;
|
2738 |
V9fsString fullname; |
2739 |
V9fsFidState *fidp; |
2740 |
V9fsPDU *pdu = opaque; |
2741 |
V9fsState *s = pdu->s; |
2742 |
|
2743 |
v9fs_string_init(&fullname); |
2744 |
pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode,
|
2745 |
&major, &minor, &gid); |
2746 |
|
2747 |
fidp = get_fid(s, fid); |
2748 |
if (fidp == NULL) { |
2749 |
err = -ENOENT; |
2750 |
goto out_nofid;
|
2751 |
} |
2752 |
v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
|
2753 |
err = v9fs_co_mknod(s, &fullname, fidp->uid, gid, |
2754 |
makedev(major, minor), mode); |
2755 |
if (err < 0) { |
2756 |
goto out;
|
2757 |
} |
2758 |
err = v9fs_co_lstat(s, &fullname, &stbuf); |
2759 |
if (err < 0) { |
2760 |
goto out;
|
2761 |
} |
2762 |
stat_to_qid(&stbuf, &qid); |
2763 |
err = offset; |
2764 |
err += pdu_marshal(pdu, offset, "Q", &qid);
|
2765 |
out:
|
2766 |
put_fid(s, fidp); |
2767 |
out_nofid:
|
2768 |
complete_pdu(s, pdu, err); |
2769 |
v9fs_string_free(&fullname); |
2770 |
v9fs_string_free(&name); |
2771 |
} |
2772 |
|
2773 |
/*
|
2774 |
* Implement posix byte range locking code
|
2775 |
* Server side handling of locking code is very simple, because 9p server in
|
2776 |
* QEMU can handle only one client. And most of the lock handling
|
2777 |
* (like conflict, merging) etc is done by the VFS layer itself, so no need to
|
2778 |
* do any thing in * qemu 9p server side lock code path.
|
2779 |
* So when a TLOCK request comes, always return success
|
2780 |
*/
|
2781 |
static void v9fs_lock(void *opaque) |
2782 |
{ |
2783 |
int8_t status; |
2784 |
V9fsFlock *flock; |
2785 |
size_t offset = 7;
|
2786 |
struct stat stbuf;
|
2787 |
V9fsFidState *fidp; |
2788 |
int32_t fid, err = 0;
|
2789 |
V9fsPDU *pdu = opaque; |
2790 |
V9fsState *s = pdu->s; |
2791 |
|
2792 |
flock = g_malloc(sizeof(*flock));
|
2793 |
pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock->type,
|
2794 |
&flock->flags, &flock->start, &flock->length, |
2795 |
&flock->proc_id, &flock->client_id); |
2796 |
status = P9_LOCK_ERROR; |
2797 |
|
2798 |
/* We support only block flag now (that too ignored currently) */
|
2799 |
if (flock->flags & ~P9_LOCK_FLAGS_BLOCK) {
|
2800 |
err = -EINVAL; |
2801 |
goto out_nofid;
|
2802 |
} |
2803 |
fidp = get_fid(s, fid); |
2804 |
if (fidp == NULL) { |
2805 |
err = -ENOENT; |
2806 |
goto out_nofid;
|
2807 |
} |
2808 |
err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf); |
2809 |
if (err < 0) { |
2810 |
goto out;
|
2811 |
} |
2812 |
status = P9_LOCK_SUCCESS; |
2813 |
out:
|
2814 |
put_fid(s, fidp); |
2815 |
out_nofid:
|
2816 |
err = offset; |
2817 |
err += pdu_marshal(pdu, offset, "b", status);
|
2818 |
complete_pdu(s, pdu, err); |
2819 |
v9fs_string_free(&flock->client_id); |
2820 |
g_free(flock); |
2821 |
} |
2822 |
|
2823 |
/*
|
2824 |
* When a TGETLOCK request comes, always return success because all lock
|
2825 |
* handling is done by client's VFS layer.
|
2826 |
*/
|
2827 |
static void v9fs_getlock(void *opaque) |
2828 |
{ |
2829 |
size_t offset = 7;
|
2830 |
struct stat stbuf;
|
2831 |
V9fsFidState *fidp; |
2832 |
V9fsGetlock *glock; |
2833 |
int32_t fid, err = 0;
|
2834 |
V9fsPDU *pdu = opaque; |
2835 |
V9fsState *s = pdu->s; |
2836 |
|
2837 |
glock = g_malloc(sizeof(*glock));
|
2838 |
pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock->type,
|
2839 |
&glock->start, &glock->length, &glock->proc_id, |
2840 |
&glock->client_id); |
2841 |
|
2842 |
fidp = get_fid(s, fid); |
2843 |
if (fidp == NULL) { |
2844 |
err = -ENOENT; |
2845 |
goto out_nofid;
|
2846 |
} |
2847 |
err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf); |
2848 |
if (err < 0) { |
2849 |
goto out;
|
2850 |
} |
2851 |
glock->type = F_UNLCK; |
2852 |
offset += pdu_marshal(pdu, offset, "bqqds", glock->type,
|
2853 |
glock->start, glock->length, glock->proc_id, |
2854 |
&glock->client_id); |
2855 |
err = offset; |
2856 |
out:
|
2857 |
put_fid(s, fidp); |
2858 |
out_nofid:
|
2859 |
complete_pdu(s, pdu, err); |
2860 |
v9fs_string_free(&glock->client_id); |
2861 |
g_free(glock); |
2862 |
} |
2863 |
|
2864 |
static void v9fs_mkdir(void *opaque) |
2865 |
{ |
2866 |
V9fsPDU *pdu = opaque; |
2867 |
size_t offset = 7;
|
2868 |
int32_t fid; |
2869 |
struct stat stbuf;
|
2870 |
V9fsString name, fullname; |
2871 |
V9fsQID qid; |
2872 |
V9fsFidState *fidp; |
2873 |
gid_t gid; |
2874 |
int mode;
|
2875 |
int err = 0; |
2876 |
|
2877 |
v9fs_string_init(&fullname); |
2878 |
pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid);
|
2879 |
|
2880 |
fidp = get_fid(pdu->s, fid); |
2881 |
if (fidp == NULL) { |
2882 |
err = -ENOENT; |
2883 |
goto out_nofid;
|
2884 |
} |
2885 |
v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
|
2886 |
err = v9fs_co_mkdir(pdu->s, fullname.data, mode, fidp->uid, gid); |
2887 |
if (err < 0) { |
2888 |
goto out;
|
2889 |
} |
2890 |
err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); |
2891 |
if (err < 0) { |
2892 |
goto out;
|
2893 |
} |
2894 |
stat_to_qid(&stbuf, &qid); |
2895 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
2896 |
err = offset; |
2897 |
out:
|
2898 |
put_fid(pdu->s, fidp); |
2899 |
out_nofid:
|
2900 |
complete_pdu(pdu->s, pdu, err); |
2901 |
v9fs_string_free(&fullname); |
2902 |
v9fs_string_free(&name); |
2903 |
} |
2904 |
|
2905 |
static void v9fs_xattrwalk(void *opaque) |
2906 |
{ |
2907 |
int64_t size; |
2908 |
V9fsString name; |
2909 |
ssize_t err = 0;
|
2910 |
size_t offset = 7;
|
2911 |
int32_t fid, newfid; |
2912 |
V9fsFidState *file_fidp; |
2913 |
V9fsFidState *xattr_fidp = NULL;
|
2914 |
V9fsPDU *pdu = opaque; |
2915 |
V9fsState *s = pdu->s; |
2916 |
|
2917 |
pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name);
|
2918 |
file_fidp = get_fid(s, fid); |
2919 |
if (file_fidp == NULL) { |
2920 |
err = -ENOENT; |
2921 |
goto out_nofid;
|
2922 |
} |
2923 |
xattr_fidp = alloc_fid(s, newfid); |
2924 |
if (xattr_fidp == NULL) { |
2925 |
err = -EINVAL; |
2926 |
goto out;
|
2927 |
} |
2928 |
v9fs_string_copy(&xattr_fidp->path, &file_fidp->path); |
2929 |
if (name.data[0] == 0) { |
2930 |
/*
|
2931 |
* listxattr request. Get the size first
|
2932 |
*/
|
2933 |
size = v9fs_co_llistxattr(s, &xattr_fidp->path, NULL, 0); |
2934 |
if (size < 0) { |
2935 |
err = size; |
2936 |
clunk_fid(s, xattr_fidp->fid); |
2937 |
goto out;
|
2938 |
} |
2939 |
/*
|
2940 |
* Read the xattr value
|
2941 |
*/
|
2942 |
xattr_fidp->fs.xattr.len = size; |
2943 |
xattr_fidp->fid_type = P9_FID_XATTR; |
2944 |
xattr_fidp->fs.xattr.copied_len = -1;
|
2945 |
if (size) {
|
2946 |
xattr_fidp->fs.xattr.value = g_malloc(size); |
2947 |
err = v9fs_co_llistxattr(s, &xattr_fidp->path, |
2948 |
xattr_fidp->fs.xattr.value, |
2949 |
xattr_fidp->fs.xattr.len); |
2950 |
if (err < 0) { |
2951 |
clunk_fid(s, xattr_fidp->fid); |
2952 |
goto out;
|
2953 |
} |
2954 |
} |
2955 |
offset += pdu_marshal(pdu, offset, "q", size);
|
2956 |
err = offset; |
2957 |
} else {
|
2958 |
/*
|
2959 |
* specific xattr fid. We check for xattr
|
2960 |
* presence also collect the xattr size
|
2961 |
*/
|
2962 |
size = v9fs_co_lgetxattr(s, &xattr_fidp->path, |
2963 |
&name, NULL, 0); |
2964 |
if (size < 0) { |
2965 |
err = size; |
2966 |
clunk_fid(s, xattr_fidp->fid); |
2967 |
goto out;
|
2968 |
} |
2969 |
/*
|
2970 |
* Read the xattr value
|
2971 |
*/
|
2972 |
xattr_fidp->fs.xattr.len = size; |
2973 |
xattr_fidp->fid_type = P9_FID_XATTR; |
2974 |
xattr_fidp->fs.xattr.copied_len = -1;
|
2975 |
if (size) {
|
2976 |
xattr_fidp->fs.xattr.value = g_malloc(size); |
2977 |
err = v9fs_co_lgetxattr(s, &xattr_fidp->path, |
2978 |
&name, xattr_fidp->fs.xattr.value, |
2979 |
xattr_fidp->fs.xattr.len); |
2980 |
if (err < 0) { |
2981 |
clunk_fid(s, xattr_fidp->fid); |
2982 |
goto out;
|
2983 |
} |
2984 |
} |
2985 |
offset += pdu_marshal(pdu, offset, "q", size);
|
2986 |
err = offset; |
2987 |
} |
2988 |
out:
|
2989 |
put_fid(s, file_fidp); |
2990 |
if (xattr_fidp) {
|
2991 |
put_fid(s, xattr_fidp); |
2992 |
} |
2993 |
out_nofid:
|
2994 |
complete_pdu(s, pdu, err); |
2995 |
v9fs_string_free(&name); |
2996 |
} |
2997 |
|
2998 |
static void v9fs_xattrcreate(void *opaque) |
2999 |
{ |
3000 |
int flags;
|
3001 |
int32_t fid; |
3002 |
int64_t size; |
3003 |
ssize_t err = 0;
|
3004 |
V9fsString name; |
3005 |
size_t offset = 7;
|
3006 |
V9fsFidState *file_fidp; |
3007 |
V9fsFidState *xattr_fidp; |
3008 |
V9fsPDU *pdu = opaque; |
3009 |
V9fsState *s = pdu->s; |
3010 |
|
3011 |
pdu_unmarshal(pdu, offset, "dsqd",
|
3012 |
&fid, &name, &size, &flags); |
3013 |
|
3014 |
file_fidp = get_fid(s, fid); |
3015 |
if (file_fidp == NULL) { |
3016 |
err = -EINVAL; |
3017 |
goto out_nofid;
|
3018 |
} |
3019 |
/* Make the file fid point to xattr */
|
3020 |
xattr_fidp = file_fidp; |
3021 |
xattr_fidp->fid_type = P9_FID_XATTR; |
3022 |
xattr_fidp->fs.xattr.copied_len = 0;
|
3023 |
xattr_fidp->fs.xattr.len = size; |
3024 |
xattr_fidp->fs.xattr.flags = flags; |
3025 |
v9fs_string_init(&xattr_fidp->fs.xattr.name); |
3026 |
v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); |
3027 |
if (size) {
|
3028 |
xattr_fidp->fs.xattr.value = g_malloc(size); |
3029 |
} else {
|
3030 |
xattr_fidp->fs.xattr.value = NULL;
|
3031 |
} |
3032 |
err = offset; |
3033 |
put_fid(s, file_fidp); |
3034 |
out_nofid:
|
3035 |
complete_pdu(s, pdu, err); |
3036 |
v9fs_string_free(&name); |
3037 |
} |
3038 |
|
3039 |
static void v9fs_readlink(void *opaque) |
3040 |
{ |
3041 |
V9fsPDU *pdu = opaque; |
3042 |
size_t offset = 7;
|
3043 |
V9fsString target; |
3044 |
int32_t fid; |
3045 |
int err = 0; |
3046 |
V9fsFidState *fidp; |
3047 |
|
3048 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
3049 |
fidp = get_fid(pdu->s, fid); |
3050 |
if (fidp == NULL) { |
3051 |
err = -ENOENT; |
3052 |
goto out_nofid;
|
3053 |
} |
3054 |
|
3055 |
v9fs_string_init(&target); |
3056 |
err = v9fs_co_readlink(pdu->s, &fidp->path, &target); |
3057 |
if (err < 0) { |
3058 |
goto out;
|
3059 |
} |
3060 |
offset += pdu_marshal(pdu, offset, "s", &target);
|
3061 |
err = offset; |
3062 |
v9fs_string_free(&target); |
3063 |
out:
|
3064 |
put_fid(pdu->s, fidp); |
3065 |
out_nofid:
|
3066 |
complete_pdu(pdu->s, pdu, err); |
3067 |
} |
3068 |
|
3069 |
static CoroutineEntry *pdu_co_handlers[] = {
|
3070 |
[P9_TREADDIR] = v9fs_readdir, |
3071 |
[P9_TSTATFS] = v9fs_statfs, |
3072 |
[P9_TGETATTR] = v9fs_getattr, |
3073 |
[P9_TSETATTR] = v9fs_setattr, |
3074 |
[P9_TXATTRWALK] = v9fs_xattrwalk, |
3075 |
[P9_TXATTRCREATE] = v9fs_xattrcreate, |
3076 |
[P9_TMKNOD] = v9fs_mknod, |
3077 |
[P9_TRENAME] = v9fs_rename, |
3078 |
[P9_TLOCK] = v9fs_lock, |
3079 |
[P9_TGETLOCK] = v9fs_getlock, |
3080 |
[P9_TRENAMEAT] = v9fs_renameat, |
3081 |
[P9_TREADLINK] = v9fs_readlink, |
3082 |
[P9_TUNLINKAT] = v9fs_unlinkat, |
3083 |
[P9_TMKDIR] = v9fs_mkdir, |
3084 |
[P9_TVERSION] = v9fs_version, |
3085 |
[P9_TLOPEN] = v9fs_open, |
3086 |
[P9_TATTACH] = v9fs_attach, |
3087 |
[P9_TSTAT] = v9fs_stat, |
3088 |
[P9_TWALK] = v9fs_walk, |
3089 |
[P9_TCLUNK] = v9fs_clunk, |
3090 |
[P9_TFSYNC] = v9fs_fsync, |
3091 |
[P9_TOPEN] = v9fs_open, |
3092 |
[P9_TREAD] = v9fs_read, |
3093 |
#if 0
|
3094 |
[P9_TAUTH] = v9fs_auth,
|
3095 |
#endif
|
3096 |
[P9_TFLUSH] = v9fs_flush, |
3097 |
[P9_TLINK] = v9fs_link, |
3098 |
[P9_TSYMLINK] = v9fs_symlink, |
3099 |
[P9_TCREATE] = v9fs_create, |
3100 |
[P9_TLCREATE] = v9fs_lcreate, |
3101 |
[P9_TWRITE] = v9fs_write, |
3102 |
[P9_TWSTAT] = v9fs_wstat, |
3103 |
[P9_TREMOVE] = v9fs_remove, |
3104 |
}; |
3105 |
|
3106 |
static void v9fs_op_not_supp(void *opaque) |
3107 |
{ |
3108 |
V9fsPDU *pdu = opaque; |
3109 |
complete_pdu(pdu->s, pdu, -EOPNOTSUPP); |
3110 |
} |
3111 |
|
3112 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
3113 |
{ |
3114 |
Coroutine *co; |
3115 |
CoroutineEntry *handler; |
3116 |
|
3117 |
if (debug_9p_pdu) {
|
3118 |
pprint_pdu(pdu); |
3119 |
} |
3120 |
if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) ||
|
3121 |
(pdu_co_handlers[pdu->id] == NULL)) {
|
3122 |
handler = v9fs_op_not_supp; |
3123 |
} else {
|
3124 |
handler = pdu_co_handlers[pdu->id]; |
3125 |
} |
3126 |
co = qemu_coroutine_create(handler); |
3127 |
qemu_coroutine_enter(co, pdu); |
3128 |
} |
3129 |
|
3130 |
void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
|
3131 |
{ |
3132 |
V9fsState *s = (V9fsState *)vdev; |
3133 |
V9fsPDU *pdu; |
3134 |
ssize_t len; |
3135 |
|
3136 |
while ((pdu = alloc_pdu(s)) &&
|
3137 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
3138 |
uint8_t *ptr; |
3139 |
pdu->s = s; |
3140 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
3141 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
3142 |
|
3143 |
ptr = pdu->elem.out_sg[0].iov_base;
|
3144 |
|
3145 |
memcpy(&pdu->size, ptr, 4);
|
3146 |
pdu->id = ptr[4];
|
3147 |
memcpy(&pdu->tag, ptr + 5, 2); |
3148 |
submit_pdu(s, pdu); |
3149 |
} |
3150 |
free_pdu(s, pdu); |
3151 |
} |
3152 |
|
3153 |
void virtio_9p_set_fd_limit(void) |
3154 |
{ |
3155 |
struct rlimit rlim;
|
3156 |
if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { |
3157 |
fprintf(stderr, "Failed to get the resource limit\n");
|
3158 |
exit(1);
|
3159 |
} |
3160 |
open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); |
3161 |
open_fd_rc = rlim.rlim_cur/2;
|
3162 |
} |