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Merge branch 'work.aio-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Browse Source 
Pull aio updates from Al Viro:
 "Majority of AIO stuff this cycle. aio-fsync and aio-poll, mostly.

  The only thing I'm holding back for a day or so is Adam's aio ioprio -
  his last-minute fixup is trivial (missing stub in !CONFIG_BLOCK case),
  but let it sit in -next for decency sake..."

* 'work.aio-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits)
  aio: sanitize the limit checking in io_submit(2)
  aio: fold do_io_submit() into callers
  aio: shift copyin of iocb into io_submit_one()
  aio_read_events_ring(): make a bit more readable
  aio: all callers of aio_{read,write,fsync,poll} treat 0 and -EIOCBQUEUED the same way
  aio: take list removal to (some) callers of aio_complete()
  aio: add missing break for the IOCB_CMD_FDSYNC case
  random: convert to ->poll_mask
  timerfd: convert to ->poll_mask
  eventfd: switch to ->poll_mask
  pipe: convert to ->poll_mask
  crypto: af_alg: convert to ->poll_mask
  net/rxrpc: convert to ->poll_mask
  net/iucv: convert to ->poll_mask
  net/phonet: convert to ->poll_mask
  net/nfc: convert to ->poll_mask
  net/caif: convert to ->poll_mask
  net/bluetooth: convert to ->poll_mask
  net/sctp: convert to ->poll_mask
  net/tipc: convert to ->poll_mask
  ...
This commit is contained in:
Linus Torvalds
2018-06-04 13:57:43 -07:00
parent b058efc1ac 1da92779e2
commit 408afb8d78
99 changed files with 891 additions and 637 deletions
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9
Documentation/filesystems/Locking
View File

@@ -440,7 +440,9 @@ prototypes:
ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);
int (*iterate) (struct file *, struct dir_context *);
int (*iterate_shared) (struct file *, struct dir_context *);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
__poll_t (*poll) (struct file *, struct poll_table_struct *);
struct wait_queue_head * (*get_poll_head)(struct file *, __poll_t);
__poll_t (*poll_mask) (struct file *, __poll_t);
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
@@ -471,7 +473,7 @@ prototypes:
};
locking rules:
All may block.
All except for ->poll_mask may block.
->llseek() locking has moved from llseek to the individual llseek
implementations. If your fs is not using generic_file_llseek, you
@@ -503,6 +505,9 @@ in sys_read() and friends.
the lease within the individual filesystem to record the result of the
operation
->poll_mask can be called with or without the waitqueue lock for the waitqueue
returned from ->get_poll_head.
--------------------------- dquot_operations -------------------------------
prototypes:
int (*write_dquot) (struct dquot *);

15
Documentation/filesystems/vfs.txt
View File

@@ -856,7 +856,9 @@ struct file_operations {
ssize_t (*read_iter) (struct kiocb *, struct iov_iter *);
ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);
int (*iterate) (struct file *, struct dir_context *);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
__poll_t (*poll) (struct file *, struct poll_table_struct *);
struct wait_queue_head * (*get_poll_head)(struct file *, __poll_t);
__poll_t (*poll_mask) (struct file *, __poll_t);
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
@@ -901,6 +903,17 @@ otherwise noted.
activity on this file and (optionally) go to sleep until there
is activity. Called by the select(2) and poll(2) system calls
get_poll_head: Returns the struct wait_queue_head that callers can
wait on. Callers need to check the returned events using ->poll_mask
once woken. Can return NULL to indicate polling is not supported,
or any error code using the ERR_PTR convention to indicate that a
grave error occured and ->poll_mask shall not be called.
poll_mask: return the mask of EPOLL* values describing the file descriptor
state. Called either before going to sleep on the waitqueue returned by
get_poll_head, or after it has been woken. If ->get_poll_head and
->poll_mask are implemented ->poll does not need to be implement.
unlocked_ioctl: called by the ioctl(2) system call.
compat_ioctl: called by the ioctl(2) system call when 32 bit system calls