Attachment 909528 Details for Bug 850426 – First of 3 patch set

[patch] First of 3 patch set

ra_syscall_interface_1of3.patch (text/plain), 2.68 KB, created by Abhijith Das on 2014-06-17 11:13:29 UTC

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Creator: Abhijith Das

Created: 2014-06-17 11:13:29 UTC

Size: 2.68 KB

patch

obsolete

>commit 7335136ab72b5a17863992dc50e6902cdf24e2af
>Author: Abhi Das <adas@redhat.com>
>Date:   Tue Jun 17 05:32:32 2014 -0500
>
>    vfs: Add interface to support rddir_readahead syscall
>    
>    Add interface to support rddir_readahead syscall
>    
>    Signed-off-by: Abhi Das <adas@redhat.com>
>
>diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
>index d6b8679..3dacf8f 100644
>--- a/arch/x86/syscalls/syscall_32.tbl
>+++ b/arch/x86/syscalls/syscall_32.tbl
>@@ -360,3 +360,4 @@
> 351	i386	sched_setattr		sys_sched_setattr
> 352	i386	sched_getattr		sys_sched_getattr
> 353	i386	renameat2		sys_renameat2
>+354	i386	rddir_readahead		sys_rddir_readahead
>diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/syscalls/syscall_64.tbl
>index 04376ac..78777f1 100644
>--- a/arch/x86/syscalls/syscall_64.tbl
>+++ b/arch/x86/syscalls/syscall_64.tbl
>@@ -323,6 +323,7 @@
> 314	common	sched_setattr		sys_sched_setattr
> 315	common	sched_getattr		sys_sched_getattr
> 316	common	renameat2		sys_renameat2
>+317	common	rddir_readahead		sys_rddir_readahead
> 
> #
> # x32-specific system call numbers start at 512 to avoid cache impact
>diff --git a/fs/readdir.c b/fs/readdir.c
>index 5b53d99..a727967 100644
>--- a/fs/readdir.c
>+++ b/fs/readdir.c
>@@ -302,3 +302,38 @@ SYSCALL_DEFINE3(getdents64, unsigned int, fd,
> 	fdput(f);
> 	return error;
> }
>+
>+SYSCALL_DEFINE4(rddir_readahead, unsigned int, fd, unsigned, flags,
>+		u64 *, offset, unsigned int, count)
>+{
>+	struct fd f;
>+	struct inode *inode;
>+	int error = -ENOTDIR;
>+
>+	f = fdget(fd);
>+	if (!f.file)
>+		return -EBADF;
>+
>+	inode = f.file->f_path.dentry->d_inode;
>+
>+	if (!f.file->f_op || !f.file->f_op->rddir_ra)
>+		goto out;
>+
>+	error = security_file_permission(f.file, MAY_READ);
>+	if (error)
>+		goto out;
>+
>+	error = mutex_lock_killable(&inode->i_mutex);
>+	if (error)
>+		goto out;
>+
>+	error = -ENOENT;
>+	if (!IS_DEADDIR(inode)) {
>+		error = f.file->f_op->rddir_ra(f.file, flags, offset, count);
>+		file_accessed(f.file);
>+	}
>+	mutex_unlock(&inode->i_mutex);
>+out:
>+	fdput(f);
>+	return error;
>+}
>diff --git a/include/linux/fs.h b/include/linux/fs.h
>index 7a9c5bc..5186b44 100644
>--- a/include/linux/fs.h
>+++ b/include/linux/fs.h
>@@ -1456,6 +1456,7 @@ struct file_operations {
> 	ssize_t (*aio_read) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
> 	ssize_t (*aio_write) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
> 	int (*iterate) (struct file *, struct dir_context *);
>+	int (*rddir_ra) (struct file *, unsigned flags, u64 *offset, unsigned int count);
> 	unsigned int (*poll) (struct file *, struct poll_table_struct *);
> 	long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
> 	long (*compat_ioctl) (struct file *, unsigned int, unsigned long);

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Attachments on bug 850426: 605960 | 617073 | 625592 | 678841 | 680222 | 680282 | 708389 | 731269 | 731270 | 731272 | 731273 | 731274 | 731278 | 731279 | 732739 | 732740 | 732845 | 834840 | 853502 | 909528 | 909529 | 909534 | 912745 | 917238 | 917239 | 920895 | 920896 | 920897 | 920898 | 920899 | 920902 | 920903 | 947987