diff options
| -rw-r--r-- | fs/nfs/file.c | 4 | ||||
| -rw-r--r-- | fs/nfs/inode.c | 37 | ||||
| -rw-r--r-- | include/linux/nfs_fs.h | 1 |
3 files changed, 37 insertions, 5 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c index c045c7169fa0..41963ffca597 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -178,7 +178,7 @@ nfs_file_read(struct kiocb *iocb, struct iov_iter *to) iocb->ki_filp, iov_iter_count(to), (unsigned long) iocb->ki_pos); - result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping); + result = nfs_revalidate_mapping_protected(inode, iocb->ki_filp->f_mapping); if (!result) { result = generic_file_read_iter(iocb, to); if (result > 0) @@ -199,7 +199,7 @@ nfs_file_splice_read(struct file *filp, loff_t *ppos, dprintk("NFS: splice_read(%pD2, %lu@%Lu)\n", filp, (unsigned long) count, (unsigned long long) *ppos); - res = nfs_revalidate_mapping(inode, filp->f_mapping); + res = nfs_revalidate_mapping_protected(inode, filp->f_mapping); if (!res) { res = generic_file_splice_read(filp, ppos, pipe, count, flags); if (res > 0) diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 5026c44a98e1..8edb7d049565 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -1067,11 +1067,14 @@ static bool nfs_mapping_need_revalidate_inode(struct inode *inode) } /** - * nfs_revalidate_mapping - Revalidate the pagecache + * __nfs_revalidate_mapping - Revalidate the pagecache * @inode - pointer to host inode * @mapping - pointer to mapping + * @may_lock - take inode->i_mutex? */ -int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) +static int __nfs_revalidate_mapping(struct inode *inode, + struct address_space *mapping, + bool may_lock) { struct nfs_inode *nfsi = NFS_I(inode); unsigned long *bitlock = &nfsi->flags; @@ -1120,7 +1123,12 @@ int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; spin_unlock(&inode->i_lock); trace_nfs_invalidate_mapping_enter(inode); - ret = nfs_invalidate_mapping(inode, mapping); + if (may_lock) { + mutex_lock(&inode->i_mutex); + ret = nfs_invalidate_mapping(inode, mapping); + mutex_unlock(&inode->i_mutex); + } else + ret = nfs_invalidate_mapping(inode, mapping); trace_nfs_invalidate_mapping_exit(inode, ret); clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); @@ -1130,6 +1138,29 @@ out: return ret; } +/** + * nfs_revalidate_mapping - Revalidate the pagecache + * @inode - pointer to host inode + * @mapping - pointer to mapping + */ +int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) +{ + return __nfs_revalidate_mapping(inode, mapping, false); +} + +/** + * nfs_revalidate_mapping_protected - Revalidate the pagecache + * @inode - pointer to host inode + * @mapping - pointer to mapping + * + * Differs from nfs_revalidate_mapping() in that it grabs the inode->i_mutex + * while invalidating the mapping. + */ +int nfs_revalidate_mapping_protected(struct inode *inode, struct address_space *mapping) +{ + return __nfs_revalidate_mapping(inode, mapping, true); +} + static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) { struct nfs_inode *nfsi = NFS_I(inode); diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index 59b1516b9fd4..b01ccf371fdc 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -356,6 +356,7 @@ extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); extern int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode); extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); +extern int nfs_revalidate_mapping_protected(struct inode *inode, struct address_space *mapping); extern int nfs_setattr(struct dentry *, struct iattr *); extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *); extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |