From: "Eric W. Biederman" <ebiederm@xmission.com>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: <linux-kernel@vger.kernel.org>, <linux-pci@vger.kernel.org>,
<linux-mm@kvack.org>, <linux-fsdevel@vger.kernel.org>,
Hugh Dickins <hugh@veritas.com>, Tejun Heo <tj@kernel.org>,
Alexey Dobriyan <adobriyan@gmail.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Greg Kroah-Hartman <gregkh@suse.de>,
Nick Piggin <npiggin@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@infradead.org>,
"Eric W. Biederman" <ebiederm@maxwell.aristanetworks.com>,
"Eric W. Biederman" <ebiederm@aristanetworks.com>
Subject: [PATCH 20/23] vfs: Teach aio to use file_hotplug_lock
Date: Mon, 1 Jun 2009 14:50:45 -0700 [thread overview]
Message-ID: <1243893048-17031-20-git-send-email-ebiederm@xmission.com> (raw)
In-Reply-To: <m1oct739xu.fsf@fess.ebiederm.org>
From: Eric W. Biederman <ebiederm@maxwell.aristanetworks.com>
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
---
fs/aio.c | 51 ++++++++++++++++++++++++++++++++++++++-------------
1 files changed, 38 insertions(+), 13 deletions(-)
diff --git a/fs/aio.c b/fs/aio.c
index 76da125..eceb215 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1362,13 +1362,20 @@ static void aio_advance_iovec(struct kiocb *iocb, ssize_t ret)
static ssize_t aio_rw_vect_retry(struct kiocb *iocb)
{
struct file *file = iocb->ki_filp;
- struct address_space *mapping = file->f_mapping;
- struct inode *inode = mapping->host;
+ struct address_space *mapping;
+ struct inode *inode;
ssize_t (*rw_op)(struct kiocb *, const struct iovec *,
unsigned long, loff_t);
ssize_t ret = 0;
unsigned short opcode;
+ ret = -EIO;
+ if (!file_hotplug_read_trylock(file))
+ goto out;
+
+ mapping = file->f_mapping;
+ inode = mapping->host;
+
if ((iocb->ki_opcode == IOCB_CMD_PREADV) ||
(iocb->ki_opcode == IOCB_CMD_PREAD)) {
rw_op = file->f_op->aio_read;
@@ -1379,8 +1386,9 @@ static ssize_t aio_rw_vect_retry(struct kiocb *iocb)
}
/* This matches the pread()/pwrite() logic */
+ ret = -EINVAL;
if (iocb->ki_pos < 0)
- return -EINVAL;
+ goto out_unlock;
do {
ret = rw_op(iocb, &iocb->ki_iovec[iocb->ki_cur_seg],
@@ -1407,26 +1415,37 @@ static ssize_t aio_rw_vect_retry(struct kiocb *iocb)
&& iocb->ki_nbytes - iocb->ki_left)
ret = iocb->ki_nbytes - iocb->ki_left;
+out_unlock:
+ file_hotplug_read_unlock(file);
+out:
return ret;
}
static ssize_t aio_fdsync(struct kiocb *iocb)
{
struct file *file = iocb->ki_filp;
- ssize_t ret = -EINVAL;
+ ssize_t ret = -EIO;
- if (file->f_op->aio_fsync)
- ret = file->f_op->aio_fsync(iocb, 1);
+ if (file_hotplug_read_trylock(file)) {
+ ret = -EINVAL;
+ if (file->f_op->aio_fsync)
+ ret = file->f_op->aio_fsync(iocb, 1);
+ file_hotplug_read_unlock(file);
+ }
return ret;
}
static ssize_t aio_fsync(struct kiocb *iocb)
{
struct file *file = iocb->ki_filp;
- ssize_t ret = -EINVAL;
+ ssize_t ret = -EIO;
- if (file->f_op->aio_fsync)
- ret = file->f_op->aio_fsync(iocb, 0);
+ if (file_hotplug_read_trylock(file)) {
+ ret = -EINVAL;
+ if (file->f_op->aio_fsync)
+ ret = file->f_op->aio_fsync(iocb, 0);
+ file_hotplug_read_unlock(file);
+ }
return ret;
}
@@ -1469,7 +1488,11 @@ static ssize_t aio_setup_single_vector(struct kiocb *kiocb)
static ssize_t aio_setup_iocb(struct kiocb *kiocb)
{
struct file *file = kiocb->ki_filp;
- ssize_t ret = 0;
+ ssize_t ret;
+
+ ret = -EIO;
+ if (!file_hotplug_read_trylock(file))
+ goto out;
switch (kiocb->ki_opcode) {
case IOCB_CMD_PREAD:
@@ -1551,10 +1574,12 @@ static ssize_t aio_setup_iocb(struct kiocb *kiocb)
ret = -EINVAL;
}
- if (!kiocb->ki_retry)
- return ret;
+ if (kiocb->ki_retry)
+ ret = 0;
- return 0;
+ file_hotplug_read_unlock(file);
+out:
+ return ret;
}
/*
--
1.6.3.1.54.g99dd.dirty
next prev parent reply other threads:[~2009-06-01 21:51 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-11 12:01 [RFC][PATCH 0/9] File descriptor hot-unplug support Eric W. Biederman
2009-04-11 12:03 ` [RFC][PATCH 1/9] mm: Introduce remap_file_mappings Eric W. Biederman
2009-04-11 12:05 ` [RFC][PATCH 2/9] mm: Implement generic support for revoking a mapping Eric W. Biederman
2009-04-11 12:06 ` [RFC][PATCH 3/9] sysfs: Use remap_file_mappings Eric W. Biederman
2009-04-11 12:07 ` [RFC][PATCH 4/9] vfs: Generalize the file_list Eric W. Biederman
2009-04-11 12:08 ` [RFC][PATCH 5/9] vfs: Introduce basic infrastructure for revoking a file Eric W. Biederman
2009-04-14 22:12 ` Jonathan Corbet
2009-04-15 2:55 ` Eric W. Biederman
2009-04-11 12:10 ` [RFC][PATCH 6/9] vfs: Utilize fops_read_lock where appropriate Eric W. Biederman
2009-04-11 12:11 ` [RFC][PATCH 7/9] vfs: Optimize fops_read_lock Eric W. Biederman
2009-04-11 12:13 ` [RFC][PATCH 8/9] vfs: Implement generic revoked file operations Eric W. Biederman
2009-04-12 18:56 ` Jamie Lokier
2009-04-12 20:04 ` Eric W. Biederman
2009-04-12 20:31 ` Jamie Lokier
2009-04-12 21:53 ` Eric W. Biederman
2009-04-12 20:54 ` Eric W. Biederman
2009-04-12 21:02 ` Jamie Lokier
2009-04-12 23:06 ` Eric W. Biederman
2009-04-11 12:14 ` [RFC][PATCH 9/9] proc: Use the generic vfs revoke facility that now exists Eric W. Biederman
2009-04-11 15:58 ` [RFC][PATCH 0/9] File descriptor hot-unplug support Al Viro
2009-04-11 16:49 ` Eric W. Biederman
2009-04-11 16:56 ` Al Viro
2009-04-11 23:57 ` Eric W. Biederman
2009-04-12 20:21 ` Eric W. Biederman
2009-04-14 3:16 ` Tejun Heo
2009-04-14 7:39 ` Eric W. Biederman
2009-04-14 7:45 ` Tejun Heo
2009-04-14 8:27 ` Eric W. Biederman
2009-04-14 8:49 ` Tejun Heo
2009-04-14 15:07 ` Jamie Lokier
2009-04-14 19:09 ` Eric W. Biederman
2009-06-01 21:45 ` [PATCH 0/23] File descriptor hot-unplug support v2 Eric W. Biederman
2009-06-01 21:50 ` [PATCH 01/23] mm: Introduce revoke_file_mappings Eric W. Biederman
2009-06-01 22:25 ` Andrew Morton
2009-06-02 0:12 ` Eric W. Biederman
2009-06-01 21:50 ` [PATCH 02/23] vfs: Implement unpoll_file Eric W. Biederman
2009-06-06 8:08 ` Al Viro
2009-06-01 21:50 ` [PATCH 03/23] vfs: Generalize the file_list Eric W. Biederman
2009-06-02 7:06 ` Nick Piggin
2009-06-05 19:33 ` Eric W. Biederman
2009-06-09 10:38 ` Nick Piggin
2009-06-09 18:38 ` Eric W. Biederman
2009-06-10 6:05 ` Nick Piggin
2009-06-01 21:50 ` [PATCH 04/23] vfs: Introduce infrastructure for revoking a file Eric W. Biederman
2009-06-02 5:16 ` Pekka Enberg
2009-06-02 6:51 ` Eric W. Biederman
2009-06-02 7:08 ` Pekka Enberg
2009-06-02 7:14 ` Nick Piggin
2009-06-02 17:06 ` Linus Torvalds
2009-06-02 20:52 ` Eric W. Biederman
2009-06-03 6:37 ` Nick Piggin
2009-06-02 22:56 ` Eric W. Biederman
2009-06-03 6:38 ` Nick Piggin
2009-06-05 9:03 ` Miklos Szeredi
2009-06-05 19:06 ` Eric W. Biederman
2009-06-01 21:50 ` [PATCH 05/23] vfs: Teach lseek to use file_hotplug_lock Eric W. Biederman
2009-06-01 21:50 ` [PATCH 06/23] vfs: Teach read/write to use file_hotplug_read_lock Eric W. Biederman
2009-06-01 21:50 ` [PATCH 07/23] vfs: Teach sendfile,splice,tee,and vmsplice to use file_hotplug_lock Eric W. Biederman
2009-06-03 23:39 ` Badari Pulavarty
2009-06-05 19:37 ` Eric W. Biederman
2009-06-01 21:50 ` [PATCH 08/23] vfs: Teach readdir " Eric W. Biederman
2009-06-01 21:50 ` [PATCH 09/23] vfs: Teach poll and select " Eric W. Biederman
2009-06-01 21:50 ` [PATCH 10/23] vfs: Teach do_path_lookup " Eric W. Biederman
2009-06-01 21:50 ` [PATCH 11/23] mm: Teach mmap " Eric W. Biederman
2009-06-01 21:50 ` [PATCH 12/23] vfs: Teach fcntl " Eric W. Biederman
2009-06-01 21:50 ` [PATCH 13/23] vfs: Teach ioctl " Eric W. Biederman
2009-06-01 21:50 ` [PATCH 14/23] vfs: Teach flock " Eric W. Biederman
2009-06-01 21:50 ` [PATCH 15/23] vfs: Teach fallocate, and filp_close " Eric W. Biederman
2009-06-01 21:50 ` [PATCH 16/23] vfs: Teach fstatfs, fstatfs64, ftruncate, fchdir, fchmod, fchown " Eric W. Biederman
2009-06-01 21:50 ` [PATCH 17/23] proc: Teach /proc/<pid>/fd " Eric W. Biederman
2009-06-01 21:50 ` [PATCH 18/23] vfs: Teach epoll " Eric W. Biederman
2009-06-02 16:51 ` Davide Libenzi
2009-06-02 21:23 ` Eric W. Biederman
2009-06-02 21:52 ` Davide Libenzi
2009-06-02 22:51 ` Eric W. Biederman
2009-06-03 14:57 ` Davide Libenzi
2009-06-03 20:53 ` Eric W. Biederman
2009-06-04 0:50 ` Davide Libenzi
2009-06-04 1:42 ` Eric W. Biederman
2009-06-01 21:50 ` [PATCH 19/23] eventpoll: Fix comment Eric W. Biederman
2009-06-01 21:50 ` Eric W. Biederman [this message]
2009-06-01 21:50 ` [PATCH 21/23] vfs: Teach fsync to use file_hotplug_lock Eric W. Biederman
2009-06-01 21:50 ` [PATCH 22/23] vfs: Teach fadvice to file_hotplug_lock Eric W. Biederman
2009-06-01 21:50 ` [PATCH 23/23] vfs: Teach readahead to use the file_hotplug_lock Eric W. Biederman
2009-06-03 23:25 ` Badari Pulavarty
2009-06-06 8:03 ` [PATCH 0/23] File descriptor hot-unplug support v2 Al Viro
2009-06-08 9:41 ` Miklos Szeredi
2009-06-08 10:24 ` Jamie Lokier
2009-06-08 16:29 ` Al Viro
2009-06-08 16:44 ` Miklos Szeredi
2009-06-08 17:50 ` Al Viro
2009-06-08 18:01 ` Linus Torvalds
2009-06-08 18:50 ` Al Viro
2009-06-08 19:18 ` Linus Torvalds
2009-06-09 6:42 ` Eric W. Biederman
2009-06-09 10:52 ` Nick Piggin
2009-06-09 5:50 ` Miklos Szeredi
2009-06-09 6:31 ` Eric W. Biederman
2009-06-09 6:22 ` Eric W. Biederman
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