diff options
Diffstat (limited to 'xlators')
| -rw-r--r-- | xlators/storage/posix/src/posix.c | 174 |
1 files changed, 90 insertions, 84 deletions
diff --git a/xlators/storage/posix/src/posix.c b/xlators/storage/posix/src/posix.c index 4f47ed027..677aa0270 100644 --- a/xlators/storage/posix/src/posix.c +++ b/xlators/storage/posix/src/posix.c @@ -2317,17 +2317,7 @@ posix_readv (call_frame_t *frame, xlator_t *this, } _fd = pfd->fd; - - op_ret = lseek (_fd, offset, SEEK_SET); - if (op_ret == -1) { - op_errno = errno; - gf_log (this->name, GF_LOG_ERROR, - "lseek(%"PRId64") failed: %s", - offset, strerror (op_errno)); - goto out; - } - - op_ret = read (_fd, iobuf->ptr, size); + op_ret = pread (_fd, iobuf->ptr, size, offset); if (op_ret == -1) { op_errno = errno; gf_log (this->name, GF_LOG_ERROR, @@ -2386,6 +2376,88 @@ out: int32_t +__posix_pwritev (int fd, struct iovec *vector, int count, off_t offset) +{ + int32_t op_ret = 0; + int idx = 0; + int retval = 0; + off_t internal_off = 0; + + if (!vector) + return -EFAULT; + + internal_off = offset; + for (idx = 0; idx < count; idx++) { + retval = pwrite (fd, vector[idx].iov_base, vector[idx].iov_len, + internal_off); + if (retval == -1) { + op_ret = -errno; + goto err; + } + op_ret += retval; + internal_off += retval; + } + +err: + return op_ret; +} + + +int32_t +__posix_writev (int fd, struct iovec *vector, int count, off_t startoff, + int odirect) +{ + int32_t op_ret = 0; + int idx = 0; + int align = 4096; + int max_buf_size = 0; + int retval = 0; + char *buf = NULL; + char *alloc_buf = NULL; + off_t internal_off = 0; + + /* Check for the O_DIRECT flag during open() */ + if (!odirect) + return __posix_pwritev (fd, vector, count, startoff); + + for (idx = 0; idx < count; idx++) { + if (max_buf_size < vector[idx].iov_len) + max_buf_size = vector[idx].iov_len; + } + + alloc_buf = GF_MALLOC (1 * (max_buf_size + align), gf_posix_mt_char); + if (!alloc_buf) { + op_ret = -errno; + goto err; + } + + internal_off = startoff; + for (idx = 0; idx < count; idx++) { + /* page aligned buffer */ + buf = ALIGN_BUF (alloc_buf, align); + + memcpy (buf, vector[idx].iov_base, vector[idx].iov_len); + + /* not sure whether writev works on O_DIRECT'd fd */ + retval = pwrite (fd, buf, vector[idx].iov_len, internal_off); + if (retval == -1) { + op_ret = -errno; + goto err; + } + + op_ret += retval; + internal_off += retval; + } + +err: + if (alloc_buf) + GF_FREE (alloc_buf); + + return op_ret; +} + + +int32_t posix_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector, int32_t count, off_t offset, struct iobref *iobref) @@ -2399,12 +2471,6 @@ posix_writev (call_frame_t *frame, xlator_t *this, struct iatt postop = {0,}; int ret = -1; - int idx = 0; - int align = 4096; - int max_buf_size = 0; - int retval = 0; - char * buf = NULL; - char * alloc_buf = NULL; uint64_t tmp_pfd = 0; VALIDATE_OR_GOTO (frame, out); @@ -2437,73 +2503,16 @@ posix_writev (call_frame_t *frame, xlator_t *this, goto out; } - op_ret = lseek (_fd, offset, SEEK_SET); - - if (op_ret == -1) { - op_errno = errno; - gf_log (this->name, GF_LOG_ERROR, - "lseek(%"PRId64") on fd=%p failed: %s", - offset, fd, strerror (op_errno)); + op_ret = __posix_writev (_fd, vector, count, offset, + (pfd->flags & O_DIRECT)); + if (op_ret < 0) { + op_errno = -op_ret; + op_ret = -1; + gf_log (this->name, GF_LOG_ERROR, "write failed: offset %"PRIu64 + ", %s", offset, strerror (op_errno)); goto out; } - /* Check for the O_DIRECT flag during open() */ - if (pfd->flags & O_DIRECT) { - /* This is O_DIRECT'd file */ - op_ret = -1; - for (idx = 0; idx < count; idx++) { - if (max_buf_size < vector[idx].iov_len) - max_buf_size = vector[idx].iov_len; - } - - alloc_buf = GF_MALLOC (1 * (max_buf_size + align), - gf_posix_mt_char); - if (!alloc_buf) { - op_errno = errno; - gf_log (this->name, GF_LOG_ERROR, - "Out of memory."); - goto out; - } - - for (idx = 0; idx < count; idx++) { - /* page aligned buffer */ - buf = ALIGN_BUF (alloc_buf, align); - - memcpy (buf, vector[idx].iov_base, - vector[idx].iov_len); - - /* not sure whether writev works on O_DIRECT'd fd */ - retval = write (_fd, buf, vector[idx].iov_len); - - if (retval == -1) { - if (op_ret == -1) { - op_errno = errno; - gf_log (this->name, GF_LOG_DEBUG, - "O_DIRECT enabled on fd=%p: %s", - fd, strerror (op_errno)); - goto out; - } - - break; - } - if (op_ret == -1) - op_ret = 0; - op_ret += retval; - } - - } else /* if (O_DIRECT) */ { - - /* This is not O_DIRECT'd fd */ - op_ret = writev (_fd, vector, count); - if (op_ret == -1) { - op_errno = errno; - gf_log (this->name, GF_LOG_ERROR, - "writev failed on fd=%p: %s", - fd, strerror (op_errno)); - goto out; - } - } - LOCK (&priv->lock); { priv->write_value += op_ret; @@ -2533,9 +2542,6 @@ posix_writev (call_frame_t *frame, xlator_t *this, } out: - if (alloc_buf) { - GF_FREE (alloc_buf); - } STACK_UNWIND_STRICT (writev, frame, op_ret, op_errno, &preop, &postop); |