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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-30 17:58:07 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-30 17:58:07 -0800 |
commit | 168fe32a072a4b8dc81a3aebf0e5e588d38e2955 (patch) | |
tree | 297f0f6192256785979f5ebfb92797f81754548d /security | |
parent | 13ddd1667e7f01071cdf120132238ffca004a88e (diff) | |
parent | c71d227fc4133f949dae620ed5e3a250b43f2415 (diff) | |
download | op-kernel-dev-168fe32a072a4b8dc81a3aebf0e5e588d38e2955.zip op-kernel-dev-168fe32a072a4b8dc81a3aebf0e5e588d38e2955.tar.gz |
Merge branch 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull poll annotations from Al Viro:
"This introduces a __bitwise type for POLL### bitmap, and propagates
the annotations through the tree. Most of that stuff is as simple as
'make ->poll() instances return __poll_t and do the same to local
variables used to hold the future return value'.
Some of the obvious brainos found in process are fixed (e.g. POLLIN
misspelled as POLL_IN). At that point the amount of sparse warnings is
low and most of them are for genuine bugs - e.g. ->poll() instance
deciding to return -EINVAL instead of a bitmap. I hadn't touched those
in this series - it's large enough as it is.
Another problem it has caught was eventpoll() ABI mess; select.c and
eventpoll.c assumed that corresponding POLL### and EPOLL### were
equal. That's true for some, but not all of them - EPOLL### are
arch-independent, but POLL### are not.
The last commit in this series separates userland POLL### values from
the (now arch-independent) kernel-side ones, converting between them
in the few places where they are copied to/from userland. AFAICS, this
is the least disruptive fix preserving poll(2) ABI and making epoll()
work on all architectures.
As it is, it's simply broken on sparc - try to give it EPOLLWRNORM and
it will trigger only on what would've triggered EPOLLWRBAND on other
architectures. EPOLLWRBAND and EPOLLRDHUP, OTOH, are never triggered
at all on sparc. With this patch they should work consistently on all
architectures"
* 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (37 commits)
make kernel-side POLL... arch-independent
eventpoll: no need to mask the result of epi_item_poll() again
eventpoll: constify struct epoll_event pointers
debugging printk in sg_poll() uses %x to print POLL... bitmap
annotate poll(2) guts
9p: untangle ->poll() mess
->si_band gets POLL... bitmap stored into a user-visible long field
ring_buffer_poll_wait() return value used as return value of ->poll()
the rest of drivers/*: annotate ->poll() instances
media: annotate ->poll() instances
fs: annotate ->poll() instances
ipc, kernel, mm: annotate ->poll() instances
net: annotate ->poll() instances
apparmor: annotate ->poll() instances
tomoyo: annotate ->poll() instances
sound: annotate ->poll() instances
acpi: annotate ->poll() instances
crypto: annotate ->poll() instances
block: annotate ->poll() instances
x86: annotate ->poll() instances
...
Diffstat (limited to 'security')
-rw-r--r-- | security/apparmor/apparmorfs.c | 4 | ||||
-rw-r--r-- | security/tomoyo/audit.c | 2 | ||||
-rw-r--r-- | security/tomoyo/common.c | 4 | ||||
-rw-r--r-- | security/tomoyo/common.h | 6 | ||||
-rw-r--r-- | security/tomoyo/securityfs_if.c | 2 |
5 files changed, 9 insertions, 9 deletions
diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c index d4fa04d..4d202b7 100644 --- a/security/apparmor/apparmorfs.c +++ b/security/apparmor/apparmorfs.c @@ -571,10 +571,10 @@ static int ns_revision_open(struct inode *inode, struct file *file) return 0; } -static unsigned int ns_revision_poll(struct file *file, poll_table *pt) +static __poll_t ns_revision_poll(struct file *file, poll_table *pt) { struct aa_revision *rev = file->private_data; - unsigned int mask = 0; + __poll_t mask = 0; if (rev) { mutex_lock_nested(&rev->ns->lock, rev->ns->level); diff --git a/security/tomoyo/audit.c b/security/tomoyo/audit.c index 0f73fe3..558e307 100644 --- a/security/tomoyo/audit.c +++ b/security/tomoyo/audit.c @@ -458,7 +458,7 @@ void tomoyo_read_log(struct tomoyo_io_buffer *head) * * Returns POLLIN | POLLRDNORM when ready to read an audit log. */ -unsigned int tomoyo_poll_log(struct file *file, poll_table *wait) +__poll_t tomoyo_poll_log(struct file *file, poll_table *wait) { if (tomoyo_log_count) return POLLIN | POLLRDNORM; diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c index 25eed4b..70c73bf 100644 --- a/security/tomoyo/common.c +++ b/security/tomoyo/common.c @@ -2120,7 +2120,7 @@ static struct tomoyo_domain_info *tomoyo_find_domain_by_qid * * Waits for access requests which violated policy in enforcing mode. */ -static unsigned int tomoyo_poll_query(struct file *file, poll_table *wait) +static __poll_t tomoyo_poll_query(struct file *file, poll_table *wait) { if (!list_empty(&tomoyo_query_list)) return POLLIN | POLLRDNORM; @@ -2453,7 +2453,7 @@ int tomoyo_open_control(const u8 type, struct file *file) * Returns POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM if ready to read/write, * POLLOUT | POLLWRNORM otherwise. */ -unsigned int tomoyo_poll_control(struct file *file, poll_table *wait) +__poll_t tomoyo_poll_control(struct file *file, poll_table *wait) { struct tomoyo_io_buffer *head = file->private_data; if (head->poll) diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h index 7adccdd..539bcdd 100644 --- a/security/tomoyo/common.h +++ b/security/tomoyo/common.h @@ -789,7 +789,7 @@ struct tomoyo_acl_param { struct tomoyo_io_buffer { void (*read) (struct tomoyo_io_buffer *); int (*write) (struct tomoyo_io_buffer *); - unsigned int (*poll) (struct file *file, poll_table *wait); + __poll_t (*poll) (struct file *file, poll_table *wait); /* Exclusive lock for this structure. */ struct mutex io_sem; char __user *read_user_buf; @@ -981,8 +981,8 @@ int tomoyo_path_number_perm(const u8 operation, const struct path *path, unsigned long number); int tomoyo_path_perm(const u8 operation, const struct path *path, const char *target); -unsigned int tomoyo_poll_control(struct file *file, poll_table *wait); -unsigned int tomoyo_poll_log(struct file *file, poll_table *wait); +__poll_t tomoyo_poll_control(struct file *file, poll_table *wait); +__poll_t tomoyo_poll_log(struct file *file, poll_table *wait); int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr, int addr_len); int tomoyo_socket_connect_permission(struct socket *sock, diff --git a/security/tomoyo/securityfs_if.c b/security/tomoyo/securityfs_if.c index 49393c2..fb9bf99 100644 --- a/security/tomoyo/securityfs_if.c +++ b/security/tomoyo/securityfs_if.c @@ -157,7 +157,7 @@ static int tomoyo_release(struct inode *inode, struct file *file) * Returns POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM if ready to read/write, * POLLOUT | POLLWRNORM otherwise. */ -static unsigned int tomoyo_poll(struct file *file, poll_table *wait) +static __poll_t tomoyo_poll(struct file *file, poll_table *wait) { return tomoyo_poll_control(file, wait); } |