diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 524dd80d1898..05ef7dcc5f21 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -36,6 +36,7 @@ #include "internal.h" #include "iostat.h" #include "fscache.h" +#include "pnfs.h" #include "nfstrace.h" @@ -327,6 +328,12 @@ static int nfs_want_read_modify_write(struct file *file, struct page *page, unsigned int offset = pos & (PAGE_CACHE_SIZE - 1); unsigned int end = offset + len; + if (pnfs_ld_read_whole_page(file->f_mapping->host)) { + if (!PageUptodate(page)) + return 1; + return 0; + } + if ((file->f_mode & FMODE_READ) && /* open for read? */ !PageUptodate(page) && /* Uptodate? */ !PagePrivate(page) && /* i/o request already? */ diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 8835b5a320cc..a4c530e52149 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -72,6 +72,7 @@ enum layoutdriver_policy_flags { /* Should the pNFS client commit and return the layout upon a setattr */ PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, PNFS_LAYOUTRET_ON_ERROR = 1 << 1, + PNFS_READ_WHOLE_PAGE = 1 << 2, }; struct nfs4_deviceid_node; @@ -369,6 +370,14 @@ pnfs_ld_layoutret_on_setattr(struct inode *inode) PNFS_LAYOUTRET_ON_SETATTR; } +static inline bool +pnfs_ld_read_whole_page(struct inode *inode) +{ + if (!pnfs_enabled_sb(NFS_SERVER(inode))) + return false; + return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; +} + static inline bool pnfs_layoutcommit_outstanding(struct inode *inode) { @@ -444,6 +453,12 @@ pnfs_ld_layoutret_on_setattr(struct inode *inode) return false; } +static inline bool +pnfs_ld_read_whole_page(struct inode *inode) +{ + return false; +} + static inline bool pnfs_roc(struct inode *ino) {