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authorBadari Pulavarty <pbadari@us.ibm.com>2006-10-01 02:28:46 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 03:39:28 -0400
commit027445c37282bc1ed26add45e573ad2d3e4860a5 (patch)
tree93eab101a938ffebaea64703033c8649df4d73f0 /mm/filemap.c
parent9ea0f9499d15c49df23e7aac4332d830c40e12d0 (diff)
[PATCH] Vectorize aio_read/aio_write fileop methods
This patch vectorizes aio_read() and aio_write() methods to prepare for collapsing all aio & vectored operations into one interface - which is aio_read()/aio_write(). Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Michael Holzheu <HOLZHEU@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/filemap.c')
-rw-r--r--mm/filemap.c39
1 files changed, 20 insertions, 19 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index c4fe97f5ace0..f6c1d22b504f 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1226,12 +1226,11 @@ out:
1226EXPORT_SYMBOL(__generic_file_aio_read); 1226EXPORT_SYMBOL(__generic_file_aio_read);
1227 1227
1228ssize_t 1228ssize_t
1229generic_file_aio_read(struct kiocb *iocb, char __user *buf, size_t count, loff_t pos) 1229generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
1230 unsigned long nr_segs, loff_t pos)
1230{ 1231{
1231 struct iovec local_iov = { .iov_base = buf, .iov_len = count };
1232
1233 BUG_ON(iocb->ki_pos != pos); 1232 BUG_ON(iocb->ki_pos != pos);
1234 return __generic_file_aio_read(iocb, &local_iov, 1, &iocb->ki_pos); 1233 return __generic_file_aio_read(iocb, iov, nr_segs, &iocb->ki_pos);
1235} 1234}
1236EXPORT_SYMBOL(generic_file_aio_read); 1235EXPORT_SYMBOL(generic_file_aio_read);
1237 1236
@@ -2315,22 +2314,22 @@ out:
2315 current->backing_dev_info = NULL; 2314 current->backing_dev_info = NULL;
2316 return written ? written : err; 2315 return written ? written : err;
2317} 2316}
2318EXPORT_SYMBOL(generic_file_aio_write_nolock);
2319 2317
2320ssize_t 2318ssize_t generic_file_aio_write_nolock(struct kiocb *iocb,
2321generic_file_aio_write_nolock(struct kiocb *iocb, const struct iovec *iov, 2319 const struct iovec *iov, unsigned long nr_segs, loff_t pos)
2322 unsigned long nr_segs, loff_t *ppos)
2323{ 2320{
2324 struct file *file = iocb->ki_filp; 2321 struct file *file = iocb->ki_filp;
2325 struct address_space *mapping = file->f_mapping; 2322 struct address_space *mapping = file->f_mapping;
2326 struct inode *inode = mapping->host; 2323 struct inode *inode = mapping->host;
2327 ssize_t ret; 2324 ssize_t ret;
2328 loff_t pos = *ppos;
2329 2325
2330 ret = __generic_file_aio_write_nolock(iocb, iov, nr_segs, ppos); 2326 BUG_ON(iocb->ki_pos != pos);
2327
2328 ret = __generic_file_aio_write_nolock(iocb, iov, nr_segs,
2329 &iocb->ki_pos);
2331 2330
2332 if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) { 2331 if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
2333 int err; 2332 ssize_t err;
2334 2333
2335 err = sync_page_range_nolock(inode, mapping, pos, ret); 2334 err = sync_page_range_nolock(inode, mapping, pos, ret);
2336 if (err < 0) 2335 if (err < 0)
@@ -2338,6 +2337,7 @@ generic_file_aio_write_nolock(struct kiocb *iocb, const struct iovec *iov,
2338 } 2337 }
2339 return ret; 2338 return ret;
2340} 2339}
2340EXPORT_SYMBOL(generic_file_aio_write_nolock);
2341 2341
2342static ssize_t 2342static ssize_t
2343__generic_file_write_nolock(struct file *file, const struct iovec *iov, 2343__generic_file_write_nolock(struct file *file, const struct iovec *iov,
@@ -2347,8 +2347,9 @@ __generic_file_write_nolock(struct file *file, const struct iovec *iov,
2347 ssize_t ret; 2347 ssize_t ret;
2348 2348
2349 init_sync_kiocb(&kiocb, file); 2349 init_sync_kiocb(&kiocb, file);
2350 kiocb.ki_pos = *ppos;
2350 ret = __generic_file_aio_write_nolock(&kiocb, iov, nr_segs, ppos); 2351 ret = __generic_file_aio_write_nolock(&kiocb, iov, nr_segs, ppos);
2351 if (ret == -EIOCBQUEUED) 2352 if (-EIOCBQUEUED == ret)
2352 ret = wait_on_sync_kiocb(&kiocb); 2353 ret = wait_on_sync_kiocb(&kiocb);
2353 return ret; 2354 return ret;
2354} 2355}
@@ -2361,28 +2362,28 @@ generic_file_write_nolock(struct file *file, const struct iovec *iov,
2361 ssize_t ret; 2362 ssize_t ret;
2362 2363
2363 init_sync_kiocb(&kiocb, file); 2364 init_sync_kiocb(&kiocb, file);
2364 ret = generic_file_aio_write_nolock(&kiocb, iov, nr_segs, ppos); 2365 kiocb.ki_pos = *ppos;
2366 ret = generic_file_aio_write_nolock(&kiocb, iov, nr_segs, *ppos);
2365 if (-EIOCBQUEUED == ret) 2367 if (-EIOCBQUEUED == ret)
2366 ret = wait_on_sync_kiocb(&kiocb); 2368 ret = wait_on_sync_kiocb(&kiocb);
2369 *ppos = kiocb.ki_pos;
2367 return ret; 2370 return ret;
2368} 2371}
2369EXPORT_SYMBOL(generic_file_write_nolock); 2372EXPORT_SYMBOL(generic_file_write_nolock);
2370 2373
2371ssize_t generic_file_aio_write(struct kiocb *iocb, const char __user *buf, 2374ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
2372 size_t count, loff_t pos) 2375 unsigned long nr_segs, loff_t pos)
2373{ 2376{
2374 struct file *file = iocb->ki_filp; 2377 struct file *file = iocb->ki_filp;
2375 struct address_space *mapping = file->f_mapping; 2378 struct address_space *mapping = file->f_mapping;
2376 struct inode *inode = mapping->host; 2379 struct inode *inode = mapping->host;
2377 ssize_t ret; 2380 ssize_t ret;
2378 struct iovec local_iov = { .iov_base = (void __user *)buf,
2379 .iov_len = count };
2380 2381
2381 BUG_ON(iocb->ki_pos != pos); 2382 BUG_ON(iocb->ki_pos != pos);
2382 2383
2383 mutex_lock(&inode->i_mutex); 2384 mutex_lock(&inode->i_mutex);
2384 ret = __generic_file_aio_write_nolock(iocb, &local_iov, 1, 2385 ret = __generic_file_aio_write_nolock(iocb, iov, nr_segs,
2385 &iocb->ki_pos); 2386 &iocb->ki_pos);
2386 mutex_unlock(&inode->i_mutex); 2387 mutex_unlock(&inode->i_mutex);
2387 2388
2388 if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) { 2389 if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {