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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-25 13:48:29 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-25 13:48:29 -0700 |
commit | 74eb94b218d087798a52c0b4f1379b635287a4b8 (patch) | |
tree | 4e467c3014c2b1169f6f71d88cf5d1598f3ce28e /fs/nfs/file.c | |
parent | 7b6181e06841f5ad15c4ff708b967b4db65a64de (diff) | |
parent | 9a84d38031c258a17bb39beed1e500eadee67407 (diff) | |
download | kernel_samsung_crespo-74eb94b218d087798a52c0b4f1379b635287a4b8.zip kernel_samsung_crespo-74eb94b218d087798a52c0b4f1379b635287a4b8.tar.gz kernel_samsung_crespo-74eb94b218d087798a52c0b4f1379b635287a4b8.tar.bz2 |
Merge branch 'nfs-for-2.6.37' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6
* 'nfs-for-2.6.37' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (67 commits)
SUNRPC: Cleanup duplicate assignment in rpcauth_refreshcred
nfs: fix unchecked value
Ask for time_delta during fsinfo probe
Revalidate caches on lock
SUNRPC: After calling xprt_release(), we must restart from call_reserve
NFSv4: Fix up the 'dircount' hint in encode_readdir
NFSv4: Clean up nfs4_decode_dirent
NFSv4: nfs4_decode_dirent must clear entry->fattr->valid
NFSv4: Fix a regression in decode_getfattr
NFSv4: Fix up decode_attr_filehandle() to handle the case of empty fh pointer
NFS: Ensure we check all allocation return values in new readdir code
NFS: Readdir plus in v4
NFS: introduce generic decode_getattr function
NFS: check xdr_decode for errors
NFS: nfs_readdir_filler catch all errors
NFS: readdir with vmapped pages
NFS: remove page size checking code
NFS: decode_dirent should use an xdr_stream
SUNRPC: Add a helper function xdr_inline_peek
NFS: remove readdir plus limit
...
Diffstat (limited to 'fs/nfs/file.c')
-rw-r--r-- | fs/nfs/file.c | 81 |
1 files changed, 56 insertions, 25 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 05bf3c0..e18c31e 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -551,7 +551,7 @@ static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) struct file *filp = vma->vm_file; struct dentry *dentry = filp->f_path.dentry; unsigned pagelen; - int ret = -EINVAL; + int ret = VM_FAULT_NOPAGE; struct address_space *mapping; dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%s/%s(%ld), offset %lld)\n", @@ -567,21 +567,20 @@ static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) if (mapping != dentry->d_inode->i_mapping) goto out_unlock; - ret = 0; pagelen = nfs_page_length(page); if (pagelen == 0) goto out_unlock; - ret = nfs_flush_incompatible(filp, page); - if (ret != 0) - goto out_unlock; + ret = VM_FAULT_LOCKED; + if (nfs_flush_incompatible(filp, page) == 0 && + nfs_updatepage(filp, page, 0, pagelen) == 0) + goto out; - ret = nfs_updatepage(filp, page, 0, pagelen); + ret = VM_FAULT_SIGBUS; out_unlock: - if (!ret) - return VM_FAULT_LOCKED; unlock_page(page); - return VM_FAULT_SIGBUS; +out: + return ret; } static const struct vm_operations_struct nfs_file_vm_ops = { @@ -684,7 +683,8 @@ static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe, return ret; } -static int do_getlk(struct file *filp, int cmd, struct file_lock *fl) +static int +do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) { struct inode *inode = filp->f_mapping->host; int status = 0; @@ -699,7 +699,7 @@ static int do_getlk(struct file *filp, int cmd, struct file_lock *fl) if (nfs_have_delegation(inode, FMODE_READ)) goto out_noconflict; - if (NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM) + if (is_local) goto out_noconflict; status = NFS_PROTO(inode)->lock(filp, cmd, fl); @@ -726,7 +726,8 @@ static int do_vfs_lock(struct file *file, struct file_lock *fl) return res; } -static int do_unlk(struct file *filp, int cmd, struct file_lock *fl) +static int +do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) { struct inode *inode = filp->f_mapping->host; int status; @@ -741,15 +742,24 @@ static int do_unlk(struct file *filp, int cmd, struct file_lock *fl) * If we're signalled while cleaning up locks on process exit, we * still need to complete the unlock. */ - /* Use local locking if mounted with "-onolock" */ - if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM)) + /* + * Use local locking if mounted with "-onolock" or with appropriate + * "-olocal_lock=" + */ + if (!is_local) status = NFS_PROTO(inode)->lock(filp, cmd, fl); else status = do_vfs_lock(filp, fl); return status; } -static int do_setlk(struct file *filp, int cmd, struct file_lock *fl) +static int +is_time_granular(struct timespec *ts) { + return ((ts->tv_sec == 0) && (ts->tv_nsec <= 1000)); +} + +static int +do_setlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) { struct inode *inode = filp->f_mapping->host; int status; @@ -762,20 +772,31 @@ static int do_setlk(struct file *filp, int cmd, struct file_lock *fl) if (status != 0) goto out; - /* Use local locking if mounted with "-onolock" */ - if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM)) + /* + * Use local locking if mounted with "-onolock" or with appropriate + * "-olocal_lock=" + */ + if (!is_local) status = NFS_PROTO(inode)->lock(filp, cmd, fl); else status = do_vfs_lock(filp, fl); if (status < 0) goto out; + /* - * Make sure we clear the cache whenever we try to get the lock. + * Revalidate the cache if the server has time stamps granular + * enough to detect subsecond changes. Otherwise, clear the + * cache to prevent missing any changes. + * * This makes locking act as a cache coherency point. */ nfs_sync_mapping(filp->f_mapping); - if (!nfs_have_delegation(inode, FMODE_READ)) - nfs_zap_caches(inode); + if (!nfs_have_delegation(inode, FMODE_READ)) { + if (is_time_granular(&NFS_SERVER(inode)->time_delta)) + __nfs_revalidate_inode(NFS_SERVER(inode), inode); + else + nfs_zap_caches(inode); + } out: return status; } @@ -787,6 +808,7 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = filp->f_mapping->host; int ret = -ENOLCK; + int is_local = 0; dprintk("NFS: lock(%s/%s, t=%x, fl=%x, r=%lld:%lld)\n", filp->f_path.dentry->d_parent->d_name.name, @@ -800,6 +822,9 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK) goto out_err; + if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FCNTL) + is_local = 1; + if (NFS_PROTO(inode)->lock_check_bounds != NULL) { ret = NFS_PROTO(inode)->lock_check_bounds(fl); if (ret < 0) @@ -807,11 +832,11 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) } if (IS_GETLK(cmd)) - ret = do_getlk(filp, cmd, fl); + ret = do_getlk(filp, cmd, fl, is_local); else if (fl->fl_type == F_UNLCK) - ret = do_unlk(filp, cmd, fl); + ret = do_unlk(filp, cmd, fl, is_local); else - ret = do_setlk(filp, cmd, fl); + ret = do_setlk(filp, cmd, fl, is_local); out_err: return ret; } @@ -821,6 +846,9 @@ out_err: */ static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) { + struct inode *inode = filp->f_mapping->host; + int is_local = 0; + dprintk("NFS: flock(%s/%s, t=%x, fl=%x)\n", filp->f_path.dentry->d_parent->d_name.name, filp->f_path.dentry->d_name.name, @@ -829,14 +857,17 @@ static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) if (!(fl->fl_flags & FL_FLOCK)) return -ENOLCK; + if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK) + is_local = 1; + /* We're simulating flock() locks using posix locks on the server */ fl->fl_owner = (fl_owner_t)filp; fl->fl_start = 0; fl->fl_end = OFFSET_MAX; if (fl->fl_type == F_UNLCK) - return do_unlk(filp, cmd, fl); - return do_setlk(filp, cmd, fl); + return do_unlk(filp, cmd, fl, is_local); + return do_setlk(filp, cmd, fl, is_local); } /* |