//#define DEBUG_FLOPPY
+#define DEBUG_BLOCK
+#if defined(DEBUG_BLOCK) && !defined(QEMU_TOOL)
+#define DEBUG_BLOCK_PRINT(formatCstr, args...) fprintf(logfile, formatCstr, ##args); fflush(logfile)
+#else
+#define DEBUG_BLOCK_PRINT(formatCstr, args...)
+#endif
+
#define FTYPE_FILE 0
#define FTYPE_CD 1
#define FTYPE_FD 2
typedef struct BDRVRawState {
int fd;
int type;
+ unsigned int lseek_err_cnt;
#if defined(__linux__)
/* linux floppy specific */
int fd_open_flags;
BDRVRawState *s = bs->opaque;
int fd, open_flags, ret;
+ s->lseek_err_cnt = 0;
+
open_flags = O_BINARY;
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
open_flags |= O_RDWR;
if (ret < 0)
return ret;
- lseek(s->fd, offset, SEEK_SET);
+ if (lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
+ ++(s->lseek_err_cnt);
+ if(s->lseek_err_cnt <= 10) {
+ DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %lld, %p, %d) [%lld] lseek failed : %d = %s\n",
+ s->fd, bs->filename, offset, buf, count,
+ bs->total_sectors, errno, strerror(errno));
+ }
+ return -1;
+ }
+ s->lseek_err_cnt=0;
+
ret = read(s->fd, buf, count);
+ if (ret == count)
+ goto label__raw_read__success;
+
+ DEBUG_BLOCK_PRINT("raw_read(%d:%s, %lld, %p, %d) [%lld] read failed %d : %d = %s\n",
+ s->fd, bs->filename, offset, buf, count,
+ bs->total_sectors, ret, errno, strerror(errno));
+
+ /* Try harder for CDrom. */
+ if (bs->type == BDRV_TYPE_CDROM) {
+ lseek(s->fd, offset, SEEK_SET);
+ ret = read(s->fd, buf, count);
+ if (ret == count)
+ goto label__raw_read__success;
+ lseek(s->fd, offset, SEEK_SET);
+ ret = read(s->fd, buf, count);
+ if (ret == count)
+ goto label__raw_read__success;
+
+ DEBUG_BLOCK_PRINT("raw_read(%d:%s, %lld, %p, %d) [%lld] retry read failed %d : %d = %s\n",
+ s->fd, bs->filename, offset, buf, count,
+ bs->total_sectors, ret, errno, strerror(errno));
+ }
+
+ return -1;
+
+label__raw_read__success:
+
return ret;
}
if (ret < 0)
return ret;
- lseek(s->fd, offset, SEEK_SET);
+ if (lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
+ ++(s->lseek_err_cnt);
+ if(s->lseek_err_cnt) {
+ DEBUG_BLOCK_PRINT("raw_write(%d:%s, %lld, %p, %d) [%lld] lseek failed : %d = %s\n",
+ s->fd, bs->filename, offset, buf, count,
+ bs->total_sectors, errno, strerror(errno));
+ }
+ return -1;
+ }
+ s->lseek_err_cnt = 0;
+
ret = write(s->fd, buf, count);
+ if (ret == count)
+ goto label__raw_write__success;
+
+ DEBUG_BLOCK_PRINT("raw_write(%d:%s, %lld, %p, %d) [%lld] write failed %d : %d = %s\n",
+ s->fd, bs->filename, offset, buf, count,
+ bs->total_sectors, ret, errno, strerror(errno));
+
+ return -1;
+
+label__raw_write__success:
+
return ret;
}