diff options
| -rw-r--r-- | fs/fuse/dir.c | 48 | ||||
| -rw-r--r-- | fs/fuse/file.c | 21 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 3 |
3 files changed, 52 insertions, 20 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 3763757f9fe..7b3df35cf19 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -775,6 +775,31 @@ static int fuse_do_getattr(struct inode *inode, struct kstat *stat, return err; } +int fuse_update_attributes(struct inode *inode, struct kstat *stat, + struct file *file, bool *refreshed) +{ + struct fuse_inode *fi = get_fuse_inode(inode); + int err; + bool r; + + if (fi->i_time < get_jiffies_64()) { + r = true; + err = fuse_do_getattr(inode, stat, file); + } else { + r = false; + err = 0; + if (stat) { + generic_fillattr(inode, stat); + stat->mode = fi->orig_i_mode; + } + } + + if (refreshed != NULL) + *refreshed = r; + + return err; +} + /* * Calling into a user-controlled filesystem gives the filesystem * daemon ptrace-like capabilities over the requester process. This @@ -862,14 +887,9 @@ static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd) */ if ((fc->flags & FUSE_DEFAULT_PERMISSIONS) || ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))) { - struct fuse_inode *fi = get_fuse_inode(inode); - if (fi->i_time < get_jiffies_64()) { - err = fuse_do_getattr(inode, NULL, NULL); - if (err) - return err; - - refreshed = true; - } + err = fuse_update_attributes(inode, NULL, NULL, &refreshed); + if (err) + return err; } if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { @@ -1173,22 +1193,12 @@ static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry, struct kstat *stat) { struct inode *inode = entry->d_inode; - struct fuse_inode *fi = get_fuse_inode(inode); struct fuse_conn *fc = get_fuse_conn(inode); - int err; if (!fuse_allow_task(fc, current)) return -EACCES; - if (fi->i_time < get_jiffies_64()) - err = fuse_do_getattr(inode, stat, NULL); - else { - err = 0; - generic_fillattr(inode, stat); - stat->mode = fi->orig_i_mode; - } - - return err; + return fuse_update_attributes(inode, stat, NULL, NULL); } static int fuse_setxattr(struct dentry *entry, const char *name, diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 535b3739900..474968fbb55 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -453,6 +453,25 @@ out: return err; } +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; + + if (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; + } + + return generic_file_aio_read(iocb, iov, nr_segs, pos); +} + static void fuse_write_fill(struct fuse_req *req, struct fuse_file *ff, struct inode *inode, loff_t pos, size_t count, int writepage) @@ -887,7 +906,7 @@ static sector_t fuse_bmap(struct address_space *mapping, sector_t block) static const struct file_operations fuse_file_operations = { .llseek = generic_file_llseek, .read = do_sync_read, - .aio_read = generic_file_aio_read, + .aio_read = fuse_file_aio_read, .write = do_sync_write, .aio_write = generic_file_aio_write, .mmap = fuse_file_mmap, diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 6c5461de1a5..19b0129c981 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -593,3 +593,6 @@ int fuse_valid_type(int m); int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task); u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id); + +int fuse_update_attributes(struct inode *inode, struct kstat *stat, + struct file *file, bool *refreshed); |