[prev in list] [next in list] [prev in thread] [next in thread]
List: linux-fsdevel
Subject: [PATCH 8 of 10] RESEND lease interfaces for version 4 NFSD
From: Andy Adamson <andros () thnk ! citi ! umich ! edu>
Date: 2004-09-21 22:36:16
Message-ID: 1095804047.21441d5b.8 () citi ! umich ! edu
[Download RAW message or body]
VFS: export setlease(), a direct interface to __setlease() used by nfsd
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
---
linux-2.6.9-rc2-andros/fs/locks.c | 33 ++++++++++++++++++++++++++++++
linux-2.6.9-rc2-andros/include/linux/fs.h | 1
2 files changed, 34 insertions(+)
diff -puN fs/locks.c~setlease fs/locks.c
--- linux-2.6.9-rc2/fs/locks.c~setlease 2004-09-21 18:00:32.094088136 -0400
+++ linux-2.6.9-rc2-andros/fs/locks.c 2004-09-21 18:00:32.100087224 -0400
@@ -1339,6 +1339,39 @@ out:
return error;
}
+ /**
+ * setlease - sets a lease on an open file
+ * @filp: file pointer
+ * @arg: type of lease to obtain
+ * @lease: file_lock to use
+ *
+ * Call this to establish a lease on the file.
+ * The fl_lmops fl_break function is required by break_lease
+ */
+
+int setlease(struct file *filp, long arg, struct file_lock **lease)
+{
+ struct dentry *dentry = filp->f_dentry;
+ struct inode *inode = dentry->d_inode;
+ int error;
+
+ if ((current->fsuid != inode->i_uid) && !capable(CAP_LEASE))
+ return -EACCES;
+ if (!S_ISREG(inode->i_mode))
+ return -EINVAL;
+ error = security_file_lock(filp, arg);
+ if (error)
+ return error;
+
+ lock_kernel();
+ error = __setlease(filp, arg, lease);
+ unlock_kernel();
+
+ return error;
+}
+
+EXPORT_SYMBOL(setlease);
+
/**
* fcntl_setlease - sets a lease on an open file
* @fd: open file descriptor
diff -puN include/linux/fs.h~setlease include/linux/fs.h
--- linux-2.6.9-rc2/include/linux/fs.h~setlease 2004-09-21 18:00:32.096087832 -0400
+++ linux-2.6.9-rc2-andros/include/linux/fs.h 2004-09-21 18:00:32.102086920 -0400
@@ -701,6 +701,7 @@ extern int posix_locks_deadlock(struct f
extern int flock_lock_file_wait(struct file *filp, struct file_lock *fl);
extern int __break_lease(struct inode *inode, unsigned int flags);
extern void lease_get_mtime(struct inode *, struct timespec *time);
+extern int setlease(struct file *, long, struct file_lock **);
extern int lock_may_read(struct inode *, loff_t start, unsigned long count);
extern int lock_may_write(struct inode *, loff_t start, unsigned long count);
extern void steal_locks(fl_owner_t from);
_
-
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic