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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH 03/15] mini-os: make offset a common struct file member for all types
Currently 4 file types have an offset member in their private struct
file part. Make offset a common struct member shared by all file types.
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
blkfront.c | 5 ++---
include/lib.h | 5 +----
lib/sys.c | 14 +++++---------
tpm_tis.c | 11 +++++------
tpmfront.c | 11 +++++------
5 files changed, 18 insertions(+), 28 deletions(-)
diff --git a/blkfront.c b/blkfront.c
index 7c8eb74..8137106 100644
--- a/blkfront.c
+++ b/blkfront.c
@@ -563,14 +563,13 @@ int blkfront_open(struct blkfront_dev *dev)
dev->fd = alloc_fd(FTYPE_BLK);
printk("blk_open(%s) -> %d\n", dev->nodename, dev->fd);
files[dev->fd].blk.dev = dev;
- files[dev->fd].blk.offset = 0;
return dev->fd;
}
int blkfront_posix_rwop(int fd, uint8_t* buf, size_t count, int write)
{
struct blkfront_dev* dev = files[fd].blk.dev;
- off_t offset = files[fd].blk.offset;
+ off_t offset = files[fd].offset;
struct blkfront_aiocb aiocb;
unsigned long long disksize = dev->info.sectors * dev->info.sector_size;
unsigned int blocksize = dev->info.sector_size;
@@ -712,7 +711,7 @@ int blkfront_posix_rwop(int fd, uint8_t* buf, size_t count,
int write)
}
free(copybuf);
- files[fd].blk.offset += rc;
+ files[fd].offset += rc;
return rc;
}
diff --git a/include/lib.h b/include/lib.h
index df2de9e..4d9b14b 100644
--- a/include/lib.h
+++ b/include/lib.h
@@ -185,6 +185,7 @@ struct evtchn_port_info {
struct file {
enum fd_type type;
bool read; /* maybe available for read */
+ off_t offset;
union {
struct {
/* lwIP fd */
@@ -193,7 +194,6 @@ struct file {
struct {
/* FS import fd */
int fd;
- off_t offset;
} file;
struct {
struct evtchn_port_list ports;
@@ -204,7 +204,6 @@ struct file {
} tap;
struct {
struct blkfront_dev *dev;
- off_t offset;
} blk;
struct {
struct kbdfront_dev *dev;
@@ -219,14 +218,12 @@ struct file {
struct {
struct tpmfront_dev *dev;
int respgot;
- off_t offset;
} tpmfront;
#endif
#ifdef CONFIG_TPM_TIS
struct {
struct tpm_chip *dev;
int respgot;
- off_t offset;
} tpm_tis;
#endif
#ifdef CONFIG_XENBUS
diff --git a/lib/sys.c b/lib/sys.c
index e8d5eb2..e1cea70 100644
--- a/lib/sys.c
+++ b/lib/sys.c
@@ -107,6 +107,7 @@ int alloc_fd(enum fd_type type)
for (i=0; i<NOFILE; i++) {
if (files[i].type == FTYPE_NONE) {
files[i].type = type;
+ files[i].offset = 0;
pthread_mutex_unlock(&fd_lock);
return i;
}
@@ -363,25 +364,20 @@ int write(int fd, const void *buf, size_t nbytes)
off_t lseek(int fd, off_t offset, int whence)
{
- off_t* target = NULL;
switch(files[fd].type) {
#ifdef CONFIG_BLKFRONT
case FTYPE_BLK:
- target = &files[fd].blk.offset;
break;
#endif
#ifdef CONFIG_TPMFRONT
case FTYPE_TPMFRONT:
- target = &files[fd].tpmfront.offset;
break;
#endif
#ifdef CONFIG_TPM_TIS
case FTYPE_TPM_TIS:
- target = &files[fd].tpm_tis.offset;
break;
#endif
case FTYPE_FILE:
- target = &files[fd].file.offset;
break;
default:
/* Not implemented for this filetype */
@@ -391,10 +387,10 @@ off_t lseek(int fd, off_t offset, int whence)
switch (whence) {
case SEEK_SET:
- *target = offset;
+ files[fd].offset = offset;
break;
case SEEK_CUR:
- *target += offset;
+ files[fd].offset += offset;
break;
case SEEK_END:
{
@@ -403,14 +399,14 @@ off_t lseek(int fd, off_t offset, int whence)
ret = fstat(fd, &st);
if (ret)
return -1;
- *target = st.st_size + offset;
+ files[fd].offset = st.st_size + offset;
break;
}
default:
errno = EINVAL;
return -1;
}
- return *target;
+ return files[fd].offset;
}
int fsync(int fd) {
diff --git a/tpm_tis.c b/tpm_tis.c
index 4a51027..8a632b1 100644
--- a/tpm_tis.c
+++ b/tpm_tis.c
@@ -847,7 +847,7 @@ int tpm_tis_send(struct tpm_chip* tpm, uint8_t* buf, size_t
len) {
if(tpm->fd >= 0) {
files[tpm->fd].read = false;
files[tpm->fd].tpm_tis.respgot = 0;
- files[tpm->fd].tpm_tis.offset = 0;
+ files[tpm->fd].offset = 0;
}
#endif
return len;
@@ -1290,7 +1290,6 @@ int tpm_tis_open(struct tpm_chip* tpm)
tpm->fd = alloc_fd(FTYPE_TPM_TIS);
printk("tpm_tis_open() -> %d\n", tpm->fd);
files[tpm->fd].tpm_tis.dev = tpm;
- files[tpm->fd].tpm_tis.offset = 0;
files[tpm->fd].tpm_tis.respgot = 0;
return tpm->fd;
}
@@ -1340,13 +1339,13 @@ int tpm_tis_posix_read(int fd, uint8_t* buf, size_t
count)
/* Handle EOF case */
- if(files[fd].tpm_tis.offset >= tpm->data_len) {
+ if(files[fd].offset >= tpm->data_len) {
rc = 0;
} else {
- rc = min(tpm->data_len - files[fd].tpm_tis.offset, count);
- memcpy(buf, tpm->data_buffer + files[fd].tpm_tis.offset, rc);
+ rc = min(tpm->data_len - files[fd].offset, count);
+ memcpy(buf, tpm->data_buffer + files[fd].offset, rc);
}
- files[fd].tpm_tis.offset += rc;
+ files[fd].offset += rc;
/* Reset the data pending flag */
return rc;
}
diff --git a/tpmfront.c b/tpmfront.c
index d825b49..8b2a910 100644
--- a/tpmfront.c
+++ b/tpmfront.c
@@ -440,7 +440,7 @@ int tpmfront_send(struct tpmfront_dev* dev, const uint8_t*
msg, size_t length)
if(dev->fd >= 0) {
files[dev->fd].read = false;
files[dev->fd].tpmfront.respgot = 0;
- files[dev->fd].tpmfront.offset = 0;
+ files[dev->fd].offset = 0;
}
#endif
wmb();
@@ -539,7 +539,6 @@ int tpmfront_open(struct tpmfront_dev* dev)
dev->fd = alloc_fd(FTYPE_TPMFRONT);
printk("tpmfront_open(%s) -> %d\n", dev->nodename, dev->fd);
files[dev->fd].tpmfront.dev = dev;
- files[dev->fd].tpmfront.offset = 0;
files[dev->fd].tpmfront.respgot = 0;
return dev->fd;
}
@@ -589,14 +588,14 @@ int tpmfront_posix_read(int fd, uint8_t* buf, size_t
count)
}
/* handle EOF case */
- if(files[dev->fd].tpmfront.offset >= dev->resplen) {
+ if(files[dev->fd].offset >= dev->resplen) {
return 0;
}
/* Compute the number of bytes and do the copy operation */
- if((rc = min(count, dev->resplen - files[dev->fd].tpmfront.offset)) != 0) {
- memcpy(buf, dev->respbuf + files[dev->fd].tpmfront.offset, rc);
- files[dev->fd].tpmfront.offset += rc;
+ if((rc = min(count, dev->resplen - files[dev->fd].offset)) != 0) {
+ memcpy(buf, dev->respbuf + files[dev->fd].offset, rc);
+ files[dev->fd].offset += rc;
}
return rc;
--
2.26.2
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