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| author | Dmitry Kasatkin <d.kasatkin@samsung.com> | 2014-11-05 17:01:17 +0200 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2014-11-17 23:14:22 -0500 |
| commit | 6fb5032ebb1c5b852461d64ee33829081de8ca61 (patch) | |
| tree | 1645235b1ff4461a8f67ed8fec24e0c15c64c614 /fs/read_write.c | |
| parent | c57782c13ecd7e7aca66cbf0139ad2a72317dc81 (diff) | |
| download | linux-6fb5032ebb1c5b852461d64ee33829081de8ca61.tar.gz linux-6fb5032ebb1c5b852461d64ee33829081de8ca61.tar.bz2 linux-6fb5032ebb1c5b852461d64ee33829081de8ca61.zip | |
VFS: refactor vfs_read()
integrity_kernel_read() duplicates the file read operations code
in vfs_read(). This patch refactors vfs_read() code creating a
helper function __vfs_read(). It is used by both vfs_read() and
integrity_kernel_read().
Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Diffstat (limited to 'fs/read_write.c')
| -rw-r--r-- | fs/read_write.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index 009d8542a889..f45b2ae5d5f1 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -412,6 +412,23 @@ ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *p EXPORT_SYMBOL(new_sync_read); +ssize_t __vfs_read(struct file *file, char __user *buf, size_t count, + loff_t *pos) +{ + ssize_t ret; + + if (file->f_op->read) + ret = file->f_op->read(file, buf, count, pos); + else if (file->f_op->aio_read) + ret = do_sync_read(file, buf, count, pos); + else if (file->f_op->read_iter) + ret = new_sync_read(file, buf, count, pos); + else + ret = -EINVAL; + + return ret; +} + ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos) { ssize_t ret; @@ -426,12 +443,7 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos) ret = rw_verify_area(READ, file, pos, count); if (ret >= 0) { count = ret; - if (file->f_op->read) - ret = file->f_op->read(file, buf, count, pos); - else if (file->f_op->aio_read) - ret = do_sync_read(file, buf, count, pos); - else - ret = new_sync_read(file, buf, count, pos); + ret = __vfs_read(file, buf, count, pos); if (ret > 0) { fsnotify_access(file); add_rchar(current, ret); |