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Merge "Small clean up of fuse code." am: 54c211db2e am: f620b87efe

Browse source 
am: c2eaefdd15

Change-Id: I800d48fb1d74531681cdcd35fcd3ea674e7c3025
This commit is contained in:
Christopher Ferris 2016-10-10 19:42:33 +00:00 committed by android-build-merger
commit 5e27cd514f
2 changed files with 60 additions and 44 deletions
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78
sdcard/fuse.cpp
View file

@ -14,6 +14,10 @@
* limitations under the License.
*/
#include <errno.h>
#include <string.h>
#include <unistd.h>
#define LOG_TAG "sdcard"
#include "fuse.h"
@ -223,7 +227,8 @@ static void attr_from_stat(struct fuse* fuse, struct fuse_attr *attr,
}
static int touch(char* path, mode_t mode) {
int fd = open(path, O_RDWR | O_CREAT | O_EXCL | O_NOFOLLOW, mode);
int fd = TEMP_FAILURE_RETRY(open(path, O_RDWR | O_CREAT | O_EXCL | O_NOFOLLOW | O_CLOEXEC,
mode));
if (fd == -1) {
if (errno == EEXIST) {
return 0;
@ -469,27 +474,34 @@ static void fuse_status(struct fuse *fuse, __u64 unique, int err)
hdr.len = sizeof(hdr);
hdr.error = err;
hdr.unique = unique;
write(fuse->fd, &hdr, sizeof(hdr));
ssize_t ret = TEMP_FAILURE_RETRY(write(fuse->fd, &hdr, sizeof(hdr)));
if (ret == -1) {
PLOG(ERROR) << "*** STATUS FAILED ***";
} else if (static_cast<size_t>(ret) != sizeof(hdr)) {
LOG(ERROR) << "*** STATUS FAILED: written " << ret << " expected "
<< sizeof(hdr) << " ***";
}
}
static void fuse_reply(struct fuse *fuse, __u64 unique, void *data, int len)
{
struct fuse_out_header hdr;
struct iovec vec[2];
int res;
hdr.len = len + sizeof(hdr);
hdr.error = 0;
hdr.unique = unique;
struct iovec vec[2];
vec[0].iov_base = &hdr;
vec[0].iov_len = sizeof(hdr);
vec[1].iov_base = data;
vec[1].iov_len = len;
res = writev(fuse->fd, vec, 2);
if (res < 0) {
ssize_t ret = TEMP_FAILURE_RETRY(writev(fuse->fd, vec, 2));
if (ret == -1) {
PLOG(ERROR) << "*** REPLY FAILED ***";
} else if (static_cast<size_t>(ret) != sizeof(hdr) + len) {
LOG(ERROR) << "*** REPLY FAILED: written " << ret << " expected "
<< sizeof(hdr) + len << " ***";
}
}
@ -501,7 +513,7 @@ static int fuse_reply_entry(struct fuse* fuse, __u64 unique,
struct fuse_entry_out out;
struct stat s;
if (lstat(path, &s) < 0) {
if (lstat(path, &s) == -1) {
return -errno;
}
@ -528,7 +540,7 @@ static int fuse_reply_attr(struct fuse* fuse, __u64 unique, const struct node* n
struct fuse_attr_out out;
struct stat s;
if (lstat(path, &s) < 0) {
if (lstat(path, &s) == -1) {
return -errno;
}
memset(&out, 0, sizeof(out));
@ -542,10 +554,7 @@ static void fuse_notify_delete(struct fuse* fuse, const __u64 parent,
const __u64 child, const char* name) {
struct fuse_out_header hdr;
struct fuse_notify_delete_out data;
struct iovec vec[3];
size_t namelen = strlen(name);
int res;
hdr.len = sizeof(hdr) + sizeof(data) + namelen + 1;
hdr.error = FUSE_NOTIFY_DELETE;
hdr.unique = 0;
@ -555,6 +564,7 @@ static void fuse_notify_delete(struct fuse* fuse, const __u64 parent,
data.namelen = namelen;
data.padding = 0;
struct iovec vec[3];
vec[0].iov_base = &hdr;
vec[0].iov_len = sizeof(hdr);
vec[1].iov_base = &data;
@ -562,10 +572,15 @@ static void fuse_notify_delete(struct fuse* fuse, const __u64 parent,
vec[2].iov_base = (void*) name;
vec[2].iov_len = namelen + 1;
res = writev(fuse->fd, vec, 3);
ssize_t ret = TEMP_FAILURE_RETRY(writev(fuse->fd, vec, 3));
/* Ignore ENOENT, since other views may not have seen the entry */
if (res < 0 && errno != ENOENT) {
PLOG(ERROR) << "*** NOTIFY FAILED ***";
if (ret == -1) {
if (errno != ENOENT) {
PLOG(ERROR) << "*** NOTIFY FAILED ***";
}
} else if (static_cast<size_t>(ret) != sizeof(hdr) + sizeof(data) + namelen + 1) {
LOG(ERROR) << "*** NOTIFY FAILED: written " << ret << " expected "
<< sizeof(hdr) + sizeof(data) + namelen + 1 << " ***";
}
}
@ -665,7 +680,7 @@ static int handle_setattr(struct fuse* fuse, struct fuse_handler* handler,
/* XXX: incomplete implementation on purpose.
* chmod/chown should NEVER be implemented.*/
if ((req->valid & FATTR_SIZE) && truncate64(path, req->size) < 0) {
if ((req->valid & FATTR_SIZE) && TEMP_FAILURE_RETRY(truncate64(path, req->size)) == -1) {
return -errno;
}
@ -727,7 +742,7 @@ static int handle_mknod(struct fuse* fuse, struct fuse_handler* handler,
return -EACCES;
}
__u32 mode = (req->mode & (~0777)) | 0664;
if (mknod(child_path, mode, req->rdev) < 0) {
if (mknod(child_path, mode, req->rdev) == -1) {
return -errno;
}
return fuse_reply_entry(fuse, hdr->unique, parent_node, name, actual_name, child_path);
@ -757,7 +772,7 @@ static int handle_mkdir(struct fuse* fuse, struct fuse_handler* handler,
return -EACCES;
}
__u32 mode = (req->mode & (~0777)) | 0775;
if (mkdir(child_path, mode) < 0) {
if (mkdir(child_path, mode) == -1) {
return -errno;
}
@ -804,7 +819,7 @@ static int handle_unlink(struct fuse* fuse, struct fuse_handler* handler,
if (!check_caller_access_to_name(fuse, hdr, parent_node, name, W_OK)) {
return -EACCES;
}
if (unlink(child_path) < 0) {
if (unlink(child_path) == -1) {
return -errno;
}
pthread_mutex_lock(&fuse->global->lock);
@ -854,7 +869,7 @@ static int handle_rmdir(struct fuse* fuse, struct fuse_handler* handler,
if (!check_caller_access_to_name(fuse, hdr, parent_node, name, W_OK)) {
return -EACCES;
}
if (rmdir(child_path) < 0) {
if (rmdir(child_path) == -1) {
return -errno;
}
pthread_mutex_lock(&fuse->global->lock);
@ -942,7 +957,7 @@ static int handle_rename(struct fuse* fuse, struct fuse_handler* handler,
DLOG(INFO) << "[" << handler->token << "] RENAME " << old_child_path << "->" << new_child_path;
res = rename(old_child_path, new_child_path);
if (res < 0) {
if (res == -1) {
res = -errno;
goto io_error;
}
@ -1004,8 +1019,8 @@ static int handle_open(struct fuse* fuse, struct fuse_handler* handler,
return -ENOMEM;
}
DLOG(INFO) << "[" << handler->token << "] OPEN " << path;
h->fd = open(path, req->flags);
if (h->fd < 0) {
h->fd = TEMP_FAILURE_RETRY(open(path, req->flags));
if (h->fd == -1) {
free(h);
return -errno;
}
@ -1041,8 +1056,8 @@ static int handle_read(struct fuse* fuse, struct fuse_handler* handler,
if (size > MAX_READ) {
return -EINVAL;
}
res = pread64(h->fd, read_buffer, size, offset);
if (res < 0) {
res = TEMP_FAILURE_RETRY(pread64(h->fd, read_buffer, size, offset));
if (res == -1) {
return -errno;
}
fuse_reply(fuse, unique, read_buffer, res);
@ -1065,8 +1080,8 @@ static int handle_write(struct fuse* fuse, struct fuse_handler* handler,
DLOG(INFO) << "[" << handler->token << "] WRITE " << std::hex << h << std::dec
<< "(" << h->fd << ") " << req->size << "@" << req->offset;
res = pwrite64(h->fd, buffer, req->size, req->offset);
if (res < 0) {
res = TEMP_FAILURE_RETRY(pwrite64(h->fd, buffer, req->size, req->offset));
if (res == -1) {
return -errno;
}
out.size = res;
@ -1090,7 +1105,7 @@ static int handle_statfs(struct fuse* fuse, struct fuse_handler* handler,
if (res < 0) {
return -ENOENT;
}
if (statfs(fuse->global->root.name, &stat) < 0) {
if (TEMP_FAILURE_RETRY(statfs(fuse->global->root.name, &stat)) == -1) {
return -errno;
}
memset(&out, 0, sizeof(out));
@ -1310,7 +1325,6 @@ static int handle_canonical_path(struct fuse* fuse, struct fuse_handler* handler
return NO_STATUS;
}
static int handle_fuse_request(struct fuse *fuse, struct fuse_handler* handler,
const struct fuse_in_header *hdr, const void *data, size_t data_len)
{
@ -1444,7 +1458,7 @@ void handle_fuse_requests(struct fuse_handler* handler)
for (;;) {
ssize_t len = TEMP_FAILURE_RETRY(read(fuse->fd,
handler->request_buffer, sizeof(handler->request_buffer)));
if (len < 0) {
if (len == -1) {
if (errno == ENODEV) {
LOG(ERROR) << "[" << handler->token << "] someone stole our marbles!";
exit(2);
@ -1453,14 +1467,14 @@ void handle_fuse_requests(struct fuse_handler* handler)
continue;
}
if ((size_t)len < sizeof(struct fuse_in_header)) {
if (static_cast<size_t>(len) < sizeof(struct fuse_in_header)) {
LOG(ERROR) << "[" << handler->token << "] request too short: len=" << len;
continue;
}
const struct fuse_in_header* hdr =
reinterpret_cast<const struct fuse_in_header*>(handler->request_buffer);
if (hdr->len != (size_t)len) {
if (hdr->len != static_cast<size_t>(len)) {
LOG(ERROR) << "[" << handler->token << "] malformed header: len=" << len
<< ", hdr->len=" << hdr->len;
continue;

26
sdcard/sdcard.cpp
View file

@ -111,7 +111,7 @@ static void watch_package_list(struct fuse_global* global) {
char event_buf[512];
int nfd = inotify_init();
if (nfd < 0) {
if (nfd == -1) {
PLOG(ERROR) << "inotify_init failed";
return;
}
@ -142,17 +142,19 @@ static void watch_package_list(struct fuse_global* global) {
}
int event_pos = 0;
int res = read(nfd, event_buf, sizeof(event_buf));
if (res < (int) sizeof(*event)) {
if (errno == EINTR)
continue;
ssize_t res = TEMP_FAILURE_RETRY(read(nfd, event_buf, sizeof(event_buf)));
if (res == -1) {
PLOG(ERROR) << "failed to read inotify event";
return;
} else if (static_cast<size_t>(res) < sizeof(*event)) {
LOG(ERROR) << "failed to read inotify event: read " << res << " expected "
<< sizeof(event_buf);
return;
}
while (res >= (int) sizeof(*event)) {
while (res >= static_cast<ssize_t>(sizeof(*event))) {
int event_size;
event = (struct inotify_event *) (event_buf + event_pos);
event = reinterpret_cast<struct inotify_event*>(event_buf + event_pos);
DLOG(INFO) << "inotify event: " << std::hex << event->mask << std::dec;
if ((event->mask & IN_IGNORED) == IN_IGNORED) {
@ -171,7 +173,7 @@ static void watch_package_list(struct fuse_global* global) {
static int fuse_setup(struct fuse* fuse, gid_t gid, mode_t mask) {
char opts[256];
fuse->fd = open("/dev/fuse", O_RDWR);
fuse->fd = TEMP_FAILURE_RETRY(open("/dev/fuse", O_RDWR | O_CLOEXEC));
if (fuse->fd == -1) {
PLOG(ERROR) << "failed to open fuse device";
return -1;
@ -182,8 +184,8 @@ static int fuse_setup(struct fuse* fuse, gid_t gid, mode_t mask) {
snprintf(opts, sizeof(opts),
"fd=%i,rootmode=40000,default_permissions,allow_other,user_id=%d,group_id=%d",
fuse->fd, fuse->global->uid, fuse->global->gid);
if (mount("/dev/fuse", fuse->dest_path, "fuse", MS_NOSUID | MS_NODEV | MS_NOEXEC |
MS_NOATIME, opts) != 0) {
if (mount("/dev/fuse", fuse->dest_path, "fuse", MS_NOSUID | MS_NODEV | MS_NOEXEC | MS_NOATIME,
opts) == -1) {
PLOG(ERROR) << "failed to mount fuse filesystem";
return -1;
}
@ -321,7 +323,7 @@ static bool sdcardfs_setup(const std::string& source_path, const std::string& de
fsuid, fsgid, multi_user?"multiuser,":"", mask, userid, gid);
if (mount(source_path.c_str(), dest_path.c_str(), "sdcardfs",
MS_NOSUID | MS_NODEV | MS_NOEXEC | MS_NOATIME, opts.c_str()) != 0) {
MS_NOSUID | MS_NODEV | MS_NOEXEC | MS_NOATIME, opts.c_str()) == -1) {
PLOG(ERROR) << "failed to mount sdcardfs filesystem";
return false;
}
@ -480,7 +482,7 @@ int main(int argc, char **argv) {
rlim.rlim_cur = 8192;
rlim.rlim_max = 8192;
if (setrlimit(RLIMIT_NOFILE, &rlim)) {
if (setrlimit(RLIMIT_NOFILE, &rlim) == -1) {
PLOG(ERROR) << "setting RLIMIT_NOFILE failed";
}