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authorDavid Chinner <dgc@sgi.com>2007-11-23 16:29:25 +1100
committerLachlan McIlroy <lachlan@redback.melbourne.sgi.com>2008-02-07 18:16:17 +1100
commit3ed6526441053d79b85d206b14d75125e6f51cc2 (patch)
tree338c4d47130cd5c2e35852309da273edf9d21146 /fs/xfs/linux-2.6
parent5d51eff4538bdfeb9b7a2ec030ee3b0980b067d2 (diff)
[XFS] Implement fallocate.
Implement the new generic callout for file preallocation. Atomically change the file size if requested. SGI-PV: 972756 SGI-Modid: xfs-linux-melb:xfs-kern:30009a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6')
-rw-r--r--fs/xfs/linux-2.6/xfs_iops.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 264b1e7dacf..9ddef91a436 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -52,6 +52,7 @@
#include <linux/xattr.h>
#include <linux/namei.h>
#include <linux/security.h>
+#include <linux/falloc.h>
/*
* Bring the atime in the XFS inode uptodate.
@@ -794,6 +795,47 @@ xfs_vn_removexattr(
return namesp->attr_remove(vp, attr, xflags);
}
+STATIC long
+xfs_vn_fallocate(
+ struct inode *inode,
+ int mode,
+ loff_t offset,
+ loff_t len)
+{
+ long error;
+ loff_t new_size = 0;
+ xfs_flock64_t bf;
+ xfs_inode_t *ip = XFS_I(inode);
+
+ /* preallocation on directories not yet supported */
+ error = -ENODEV;
+ if (S_ISDIR(inode->i_mode))
+ goto out_error;
+
+ bf.l_whence = 0;
+ bf.l_start = offset;
+ bf.l_len = len;
+
+ xfs_ilock(ip, XFS_IOLOCK_EXCL);
+ error = xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
+ 0, NULL, ATTR_NOLOCK);
+ if (!error && !(mode & FALLOC_FL_KEEP_SIZE) &&
+ offset + len > i_size_read(inode))
+ new_size = offset + len;
+
+ /* Change file size if needed */
+ if (new_size) {
+ bhv_vattr_t va;
+
+ va.va_mask = XFS_AT_SIZE;
+ va.va_size = new_size;
+ error = xfs_setattr(ip, &va, ATTR_NOLOCK, NULL);
+ }
+
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+out_error:
+ return error;
+}
const struct inode_operations xfs_inode_operations = {
.permission = xfs_vn_permission,
@@ -804,6 +846,7 @@ const struct inode_operations xfs_inode_operations = {
.getxattr = xfs_vn_getxattr,
.listxattr = xfs_vn_listxattr,
.removexattr = xfs_vn_removexattr,
+ .fallocate = xfs_vn_fallocate,
};
const struct inode_operations xfs_dir_inode_operations = {