diff options
Diffstat (limited to 'fs/xfs/xfs_file.c')
| -rw-r--r-- | fs/xfs/xfs_file.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 28101bbc0b78..d952d5962e93 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -28,6 +28,7 @@ #include <linux/falloc.h> #include <linux/backing-dev.h> #include <linux/mman.h> +#include <linux/fadvise.h> static const struct vm_operations_struct xfs_file_vm_ops; @@ -933,6 +934,30 @@ out_unlock: return error; } +STATIC int +xfs_file_fadvise( + struct file *file, + loff_t start, + loff_t end, + int advice) +{ + struct xfs_inode *ip = XFS_I(file_inode(file)); + int ret; + int lockflags = 0; + + /* + * Operations creating pages in page cache need protection from hole + * punching and similar ops + */ + if (advice == POSIX_FADV_WILLNEED) { + lockflags = XFS_IOLOCK_SHARED; + xfs_ilock(ip, lockflags); + } + ret = generic_fadvise(file, start, end, advice); + if (lockflags) + xfs_iunlock(ip, lockflags); + return ret; +} STATIC loff_t xfs_file_remap_range( @@ -1232,6 +1257,7 @@ const struct file_operations xfs_file_operations = { .fsync = xfs_file_fsync, .get_unmapped_area = thp_get_unmapped_area, .fallocate = xfs_file_fallocate, + .fadvise = xfs_file_fadvise, .remap_file_range = xfs_file_remap_range, }; |