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authorLinus Torvalds <torvalds@linux-foundation.org>2012-08-16 11:46:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-08-16 11:46:31 -0700
commit2eac9eb8a2e64cbfcc300e9a8098edf424c1d16c (patch)
treef3c4b8f25e2d25915e14ced10db661cae1341807 /fs/fuse
parentad54e461137765aaf090eb7f54c3b51fc0ad5d62 (diff)
parentfb6ccff667712c46b4501b920ea73a326e49626a (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
Pull fuse updates from Miklos Szeredi. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: verify all ioctl retry iov elements fuse: add missing INIT flag descriptions fuse: add missing INIT flags fuse: update attributes on aio_read fuse: invalidate inode mapping if mtime changes fuse: add FUSE_AUTO_INVAL_DATA init flag
Diffstat (limited to 'fs/fuse')
-rw-r--r--fs/fuse/file.c15
-rw-r--r--fs/fuse/fuse_i.h3
-rw-r--r--fs/fuse/inode.c32
3 files changed, 40 insertions, 10 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 93d8d6c9494..aba15f1b7ad 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -703,13 +703,16 @@ static ssize_t fuse_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
struct inode *inode = iocb->ki_filp->f_mapping->host;
+ struct fuse_conn *fc = get_fuse_conn(inode);
- if (pos + iov_length(iov, nr_segs) > i_size_read(inode)) {
+ /*
+ * In auto invalidate mode, always update attributes on read.
+ * Otherwise, only update if we attempt to read past EOF (to ensure
+ * i_size is up to date).
+ */
+ if (fc->auto_inval_data ||
+ (pos + iov_length(iov, nr_segs) > i_size_read(inode))) {
int err;
- /*
- * If trying to read past EOF, make sure the i_size
- * attribute is up-to-date.
- */
err = fuse_update_attributes(inode, NULL, iocb->ki_filp, NULL);
if (err)
return err;
@@ -1700,7 +1703,7 @@ static int fuse_verify_ioctl_iov(struct iovec *iov, size_t count)
size_t n;
u32 max = FUSE_MAX_PAGES_PER_REQ << PAGE_SHIFT;
- for (n = 0; n < count; n++) {
+ for (n = 0; n < count; n++, iov++) {
if (iov->iov_len > (size_t) max)
return -ENOMEM;
max -= iov->iov_len;
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 771fb6322c0..e24dd74e306 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -484,6 +484,9 @@ struct fuse_conn {
/** Is fallocate not implemented by fs? */
unsigned no_fallocate:1;
+ /** Use enhanced/automatic page cache invalidation. */
+ unsigned auto_inval_data:1;
+
/** The number of requests waiting for completion */
atomic_t num_waiting;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 1cd61652018..ce0a2838ccd 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -197,6 +197,7 @@ void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_inode *fi = get_fuse_inode(inode);
loff_t oldsize;
+ struct timespec old_mtime;
spin_lock(&fc->lock);
if (attr_version != 0 && fi->attr_version > attr_version) {
@@ -204,15 +205,35 @@ void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
return;
}
+ old_mtime = inode->i_mtime;
fuse_change_attributes_common(inode, attr, attr_valid);
oldsize = inode->i_size;
i_size_write(inode, attr->size);
spin_unlock(&fc->lock);
- if (S_ISREG(inode->i_mode) && oldsize != attr->size) {
- truncate_pagecache(inode, oldsize, attr->size);
- invalidate_inode_pages2(inode->i_mapping);
+ if (S_ISREG(inode->i_mode)) {
+ bool inval = false;
+
+ if (oldsize != attr->size) {
+ truncate_pagecache(inode, oldsize, attr->size);
+ inval = true;
+ } else if (fc->auto_inval_data) {
+ struct timespec new_mtime = {
+ .tv_sec = attr->mtime,
+ .tv_nsec = attr->mtimensec,
+ };
+
+ /*
+ * Auto inval mode also checks and invalidates if mtime
+ * has changed.
+ */
+ if (!timespec_equal(&old_mtime, &new_mtime))
+ inval = true;
+ }
+
+ if (inval)
+ invalidate_inode_pages2(inode->i_mapping);
}
}
@@ -834,6 +855,8 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
fc->big_writes = 1;
if (arg->flags & FUSE_DONT_MASK)
fc->dont_mask = 1;
+ if (arg->flags & FUSE_AUTO_INVAL_DATA)
+ fc->auto_inval_data = 1;
} else {
ra_pages = fc->max_read / PAGE_CACHE_SIZE;
fc->no_lock = 1;
@@ -859,7 +882,8 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
arg->max_readahead = fc->bdi.ra_pages * PAGE_CACHE_SIZE;
arg->flags |= FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC |
FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK |
- FUSE_FLOCK_LOCKS;
+ FUSE_SPLICE_WRITE | FUSE_SPLICE_MOVE | FUSE_SPLICE_READ |
+ FUSE_FLOCK_LOCKS | FUSE_IOCTL_DIR | FUSE_AUTO_INVAL_DATA;
req->in.h.opcode = FUSE_INIT;
req->in.numargs = 1;
req->in.args[0].size = sizeof(*arg);