diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/xfs_file.c | 26 | ||||
| -rw-r--r-- | fs/xfs/xfs_inode.h | 16 | ||||
| -rw-r--r-- | fs/xfs/xfs_ioctl.c | 3 | ||||
| -rw-r--r-- | fs/xfs/xfs_iops.c | 6 | ||||
| -rw-r--r-- | fs/xfs/xfs_pnfs.c | 12 | ||||
| -rw-r--r-- | fs/xfs/xfs_pnfs.h | 5 |
6 files changed, 53 insertions, 15 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 35309bd046be..4774c7172ef4 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -312,7 +312,7 @@ restart: if (error <= 0) return error; - error = xfs_break_layouts(inode, iolock); + error = xfs_break_layouts(inode, iolock, BREAK_WRITE); if (error) return error; @@ -718,6 +718,28 @@ buffered: return ret; } +int +xfs_break_layouts( + struct inode *inode, + uint *iolock, + enum layout_break_reason reason) +{ + bool retry; + + ASSERT(xfs_isilocked(XFS_I(inode), XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)); + + switch (reason) { + case BREAK_UNMAP: + ASSERT(xfs_isilocked(XFS_I(inode), XFS_MMAPLOCK_EXCL)); + /* fall through */ + case BREAK_WRITE: + return xfs_break_leased_layouts(inode, iolock, &retry); + default: + WARN_ON_ONCE(1); + return -EINVAL; + } +} + #define XFS_FALLOC_FL_SUPPORTED \ (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | \ FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | \ @@ -744,7 +766,7 @@ xfs_file_fallocate( return -EOPNOTSUPP; xfs_ilock(ip, iolock); - error = xfs_break_layouts(inode, &iolock); + error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); if (error) goto out_unlock; diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 1eebc53df7d7..e5b849815ce1 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -379,6 +379,20 @@ static inline void xfs_ifunlock(struct xfs_inode *ip) >> XFS_ILOCK_SHIFT) /* + * Layouts are broken in the BREAK_WRITE case to ensure that + * layout-holders do not collide with local writes. Additionally, + * layouts are broken in the BREAK_UNMAP case to make sure the + * layout-holder has a consistent view of the file's extent map. While + * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases, + * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to + * go idle. + */ +enum layout_break_reason { + BREAK_WRITE, + BREAK_UNMAP, +}; + +/* * For multiple groups support: if S_ISGID bit is set in the parent * directory, group of new file is set to that of the parent, and * new subdirectory gets S_ISGID bit from parent. @@ -443,6 +457,8 @@ enum xfs_prealloc_flags { int xfs_update_prealloc_flags(struct xfs_inode *ip, enum xfs_prealloc_flags flags); +int xfs_break_layouts(struct inode *inode, uint *iolock, + enum layout_break_reason reason); /* from xfs_iops.c */ extern void xfs_setup_inode(struct xfs_inode *ip); diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 4151fade4bb1..91e73d663099 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -39,7 +39,6 @@ #include "xfs_icache.h" #include "xfs_symlink.h" #include "xfs_trans.h" -#include "xfs_pnfs.h" #include "xfs_acl.h" #include "xfs_btree.h" #include <linux/fsmap.h> @@ -644,7 +643,7 @@ xfs_ioc_space( return error; xfs_ilock(ip, iolock); - error = xfs_break_layouts(inode, &iolock); + error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); if (error) goto out_unlock; diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 138fb36ca875..ce0c1f9466a8 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -37,7 +37,6 @@ #include "xfs_da_btree.h" #include "xfs_dir2.h" #include "xfs_trans_space.h" -#include "xfs_pnfs.h" #include "xfs_iomap.h" #include <linux/capability.h> @@ -1030,13 +1029,14 @@ xfs_vn_setattr( int error; if (iattr->ia_valid & ATTR_SIZE) { - struct xfs_inode *ip = XFS_I(d_inode(dentry)); + struct inode *inode = d_inode(dentry); + struct xfs_inode *ip = XFS_I(inode); uint iolock; xfs_ilock(ip, XFS_MMAPLOCK_EXCL); iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; - error = xfs_break_layouts(d_inode(dentry), &iolock); + error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); if (error) { xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); return error; diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c index 6ea7b0b55d02..f44c3599527d 100644 --- a/fs/xfs/xfs_pnfs.c +++ b/fs/xfs/xfs_pnfs.c @@ -31,17 +31,17 @@ * rules in the page fault path we don't bother. */ int -xfs_break_layouts( +xfs_break_leased_layouts( struct inode *inode, - uint *iolock) + uint *iolock, + bool *did_unlock) { struct xfs_inode *ip = XFS_I(inode); int error; - ASSERT(xfs_isilocked(ip, XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)); - while ((error = break_layout(inode, false) == -EWOULDBLOCK)) { xfs_iunlock(ip, *iolock); + *did_unlock = true; error = break_layout(inode, true); *iolock &= ~XFS_IOLOCK_SHARED; *iolock |= XFS_IOLOCK_EXCL; @@ -121,8 +121,8 @@ xfs_fs_map_blocks( * Lock out any other I/O before we flush and invalidate the pagecache, * and then hand out a layout to the remote system. This is very * similar to direct I/O, except that the synchronization is much more - * complicated. See the comment near xfs_break_layouts for a detailed - * explanation. + * complicated. See the comment near xfs_break_leased_layouts + * for a detailed explanation. */ xfs_ilock(ip, XFS_IOLOCK_EXCL); diff --git a/fs/xfs/xfs_pnfs.h b/fs/xfs/xfs_pnfs.h index bf45951e28fe..940c6c2ad88c 100644 --- a/fs/xfs/xfs_pnfs.h +++ b/fs/xfs/xfs_pnfs.h @@ -9,10 +9,11 @@ int xfs_fs_map_blocks(struct inode *inode, loff_t offset, u64 length, int xfs_fs_commit_blocks(struct inode *inode, struct iomap *maps, int nr_maps, struct iattr *iattr); -int xfs_break_layouts(struct inode *inode, uint *iolock); +int xfs_break_leased_layouts(struct inode *inode, uint *iolock, + bool *did_unlock); #else static inline int -xfs_break_layouts(struct inode *inode, uint *iolock) +xfs_break_leased_layouts(struct inode *inode, uint *iolock, bool *did_unlock) { return 0; } |