X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;ds=sidebyside;f=fs%2Fnfs%2Ffile.c;h=9e4a2b70995a2fc1694b5d34cbb23d88d98c1e15;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=7a79fbe9f5394c67dd53b01526d37e29fae0ce4e;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 7a79fbe9f..9e4a2b709 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -32,6 +32,7 @@ #include #include "delegation.h" +#include "iostat.h" #define NFSDBG_FACILITY NFSDBG_FILE @@ -40,20 +41,22 @@ static int nfs_file_release(struct inode *, struct file *); static loff_t nfs_file_llseek(struct file *file, loff_t offset, int origin); static int nfs_file_mmap(struct file *, struct vm_area_struct *); static ssize_t nfs_file_sendfile(struct file *, loff_t *, size_t, read_actor_t, void *); -static ssize_t nfs_file_read(struct kiocb *, char __user *, size_t, loff_t); -static ssize_t nfs_file_write(struct kiocb *, const char __user *, size_t, loff_t); -static int nfs_file_flush(struct file *); +static ssize_t nfs_file_read(struct kiocb *, const struct iovec *iov, + unsigned long nr_segs, loff_t pos); +static ssize_t nfs_file_write(struct kiocb *, const struct iovec *iov, + unsigned long nr_segs, loff_t pos); +static int nfs_file_flush(struct file *, fl_owner_t id); static int nfs_fsync(struct file *, struct dentry *dentry, int datasync); static int nfs_check_flags(int flags); static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl); static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl); -struct file_operations nfs_file_operations = { +const struct file_operations nfs_file_operations = { .llseek = nfs_file_llseek, .read = do_sync_read, .write = do_sync_write, - .aio_read = nfs_file_read, - .aio_write = nfs_file_write, + .aio_read = nfs_file_read, + .aio_write = nfs_file_write, .mmap = nfs_file_mmap, .open = nfs_file_open, .flush = nfs_file_flush, @@ -102,18 +105,15 @@ static int nfs_check_flags(int flags) static int nfs_file_open(struct inode *inode, struct file *filp) { - struct nfs_server *server = NFS_SERVER(inode); - int (*open)(struct inode *, struct file *); int res; res = nfs_check_flags(filp->f_flags); if (res) return res; + nfs_inc_stats(inode, NFSIOS_VFSOPEN); lock_kernel(); - /* Do NFSv4 open() call */ - if ((open = server->rpc_ops->file_open) != NULL) - res = open(inode, filp); + res = NFS_PROTO(inode)->file_open(inode, filp); unlock_kernel(); return res; } @@ -124,26 +124,10 @@ nfs_file_release(struct inode *inode, struct file *filp) /* Ensure that dirty pages are flushed out with the right creds */ if (filp->f_mode & FMODE_WRITE) filemap_fdatawrite(filp->f_mapping); + nfs_inc_stats(inode, NFSIOS_VFSRELEASE); return NFS_PROTO(inode)->file_release(inode, filp); } -/** - * nfs_revalidate_file - Revalidate the page cache & related metadata - * @inode - pointer to inode struct - * @file - pointer to file - */ -static int nfs_revalidate_file(struct inode *inode, struct file *filp) -{ - struct nfs_inode *nfsi = NFS_I(inode); - int retval = 0; - - if ((nfsi->cache_validity & (NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATTR)) - || nfs_attribute_timeout(inode)) - retval = __nfs_revalidate_inode(NFS_SERVER(inode), inode); - nfs_revalidate_mapping(inode, filp->f_mapping); - return 0; -} - /** * nfs_revalidate_size - Revalidate the file size * @inode - pointer to inode struct @@ -175,7 +159,7 @@ force_reval: static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin) { /* origin == SEEK_END => we must revalidate the cached file length */ - if (origin == 2) { + if (origin == SEEK_END) { struct inode *inode = filp->f_mapping->host; int retval = nfs_revalidate_file_size(inode, filp); if (retval < 0) @@ -189,16 +173,17 @@ static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin) * */ static int -nfs_file_flush(struct file *file) +nfs_file_flush(struct file *file, fl_owner_t id) { struct nfs_open_context *ctx = (struct nfs_open_context *)file->private_data; - struct inode *inode = file->f_dentry->d_inode; + struct inode *inode = file->f_path.dentry->d_inode; int status; dfprintk(VFS, "nfs: flush(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino); if ((file->f_mode & FMODE_WRITE) == 0) return 0; + nfs_inc_stats(inode, NFSIOS_VFSFLUSH); lock_kernel(); /* Ensure that data+attribute caches are up to date after close() */ status = nfs_wb_all(inode); @@ -213,24 +198,27 @@ nfs_file_flush(struct file *file) } static ssize_t -nfs_file_read(struct kiocb *iocb, char __user * buf, size_t count, loff_t pos) +nfs_file_read(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) { - struct dentry * dentry = iocb->ki_filp->f_dentry; + struct dentry * dentry = iocb->ki_filp->f_path.dentry; struct inode * inode = dentry->d_inode; ssize_t result; + size_t count = iov_length(iov, nr_segs); #ifdef CONFIG_NFS_DIRECTIO if (iocb->ki_filp->f_flags & O_DIRECT) - return nfs_file_direct_read(iocb, buf, count, pos); + return nfs_file_direct_read(iocb, iov, nr_segs, pos); #endif dfprintk(VFS, "nfs: read(%s/%s, %lu@%lu)\n", dentry->d_parent->d_name.name, dentry->d_name.name, (unsigned long) count, (unsigned long) pos); - result = nfs_revalidate_file(inode, iocb->ki_filp); + result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping); + nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, count); if (!result) - result = generic_file_aio_read(iocb, buf, count, pos); + result = generic_file_aio_read(iocb, iov, nr_segs, pos); return result; } @@ -238,7 +226,7 @@ static ssize_t nfs_file_sendfile(struct file *filp, loff_t *ppos, size_t count, read_actor_t actor, void *target) { - struct dentry *dentry = filp->f_dentry; + struct dentry *dentry = filp->f_path.dentry; struct inode *inode = dentry->d_inode; ssize_t res; @@ -246,7 +234,7 @@ nfs_file_sendfile(struct file *filp, loff_t *ppos, size_t count, dentry->d_parent->d_name.name, dentry->d_name.name, (unsigned long) count, (unsigned long long) *ppos); - res = nfs_revalidate_file(inode, filp); + res = nfs_revalidate_mapping(inode, filp->f_mapping); if (!res) res = generic_file_sendfile(filp, ppos, count, actor, target); return res; @@ -255,14 +243,14 @@ nfs_file_sendfile(struct file *filp, loff_t *ppos, size_t count, static int nfs_file_mmap(struct file * file, struct vm_area_struct * vma) { - struct dentry *dentry = file->f_dentry; + struct dentry *dentry = file->f_path.dentry; struct inode *inode = dentry->d_inode; int status; dfprintk(VFS, "nfs: mmap(%s/%s)\n", dentry->d_parent->d_name.name, dentry->d_name.name); - status = nfs_revalidate_file(inode, file); + status = nfs_revalidate_mapping(inode, file->f_mapping); if (!status) status = generic_file_mmap(file, vma); return status; @@ -282,6 +270,7 @@ nfs_fsync(struct file *file, struct dentry *dentry, int datasync) dfprintk(VFS, "nfs: fsync(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino); + nfs_inc_stats(inode, NFSIOS_VFSFSYNC); lock_kernel(); status = nfs_wb_all(inode); if (!status) { @@ -316,37 +305,57 @@ static int nfs_commit_write(struct file *file, struct page *page, unsigned offse return status; } -struct address_space_operations nfs_file_aops = { +static void nfs_invalidate_page(struct page *page, unsigned long offset) +{ + if (offset != 0) + return; + /* Cancel any unstarted writes on this page */ + nfs_wb_page_priority(page->mapping->host, page, FLUSH_INVALIDATE); +} + +static int nfs_release_page(struct page *page, gfp_t gfp) +{ + /* If PagePrivate() is set, then the page is not freeable */ + return 0; +} + +static int nfs_launder_page(struct page *page) +{ + return nfs_wb_page(page->mapping->host, page); +} + +const struct address_space_operations nfs_file_aops = { .readpage = nfs_readpage, .readpages = nfs_readpages, - .set_page_dirty = __set_page_dirty_nobuffers, + .set_page_dirty = nfs_set_page_dirty, .writepage = nfs_writepage, .writepages = nfs_writepages, .prepare_write = nfs_prepare_write, .commit_write = nfs_commit_write, + .invalidatepage = nfs_invalidate_page, + .releasepage = nfs_release_page, #ifdef CONFIG_NFS_DIRECTIO .direct_IO = nfs_direct_IO, #endif + .launder_page = nfs_launder_page, }; -/* - * Write to a file (through the page cache). - */ -static ssize_t -nfs_file_write(struct kiocb *iocb, const char __user *buf, size_t count, loff_t pos) +static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) { - struct dentry * dentry = iocb->ki_filp->f_dentry; + struct dentry * dentry = iocb->ki_filp->f_path.dentry; struct inode * inode = dentry->d_inode; ssize_t result; + size_t count = iov_length(iov, nr_segs); #ifdef CONFIG_NFS_DIRECTIO if (iocb->ki_filp->f_flags & O_DIRECT) - return nfs_file_direct_write(iocb, buf, count, pos); + return nfs_file_direct_write(iocb, iov, nr_segs, pos); #endif - dfprintk(VFS, "nfs: write(%s/%s(%ld), %lu@%lu)\n", + dfprintk(VFS, "nfs: write(%s/%s(%ld), %lu@%Ld)\n", dentry->d_parent->d_name.name, dentry->d_name.name, - inode->i_ino, (unsigned long) count, (unsigned long) pos); + inode->i_ino, (unsigned long) count, (long long) pos); result = -EBUSY; if (IS_SWAPFILE(inode)) @@ -359,13 +368,19 @@ nfs_file_write(struct kiocb *iocb, const char __user *buf, size_t count, loff_t if (result) goto out; } - nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping); result = count; if (!count) goto out; - result = generic_file_aio_write(iocb, buf, count, pos); + nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, count); + result = generic_file_aio_write(iocb, iov, nr_segs, pos); + /* Return error values for O_SYNC and IS_SYNC() */ + if (result >= 0 && (IS_SYNC(inode) || (iocb->ki_filp->f_flags & O_SYNC))) { + int err = nfs_fsync(iocb->ki_filp, dentry, 1); + if (err < 0) + result = err; + } out: return result; @@ -376,15 +391,17 @@ out_swapfile: static int do_getlk(struct file *filp, int cmd, struct file_lock *fl) { - struct file_lock *cfl; + struct file_lock cfl; struct inode *inode = filp->f_mapping->host; int status = 0; lock_kernel(); /* Try local locking first */ - cfl = posix_test_lock(filp, fl); - if (cfl != NULL) { - locks_copy_lock(fl, cfl); + if (posix_test_lock(filp, fl, &cfl)) { + fl->fl_start = cfl.fl_start; + fl->fl_end = cfl.fl_end; + fl->fl_type = cfl.fl_type; + fl->fl_pid = cfl.fl_pid; goto out; } @@ -417,18 +434,17 @@ static int do_vfs_lock(struct file *file, struct file_lock *fl) BUG(); } if (res < 0) - printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", - __FUNCTION__); + dprintk(KERN_WARNING "%s: VFS is out of sync with lock manager" + " - error %d!\n", + __FUNCTION__, res); return res; } static int do_unlk(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = filp->f_mapping->host; - sigset_t oldset; int status; - rpc_clnt_sigmask(NFS_CLIENT(inode), &oldset); /* * Flush all pending writes before doing anything * with locks.. @@ -446,17 +462,14 @@ static int do_unlk(struct file *filp, int cmd, struct file_lock *fl) else status = do_vfs_lock(filp, fl); unlock_kernel(); - rpc_clnt_sigunmask(NFS_CLIENT(inode), &oldset); return status; } static int do_setlk(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = filp->f_mapping->host; - sigset_t oldset; int status; - rpc_clnt_sigmask(NFS_CLIENT(inode), &oldset); /* * Flush all pending writes before doing anything * with locks.. @@ -489,7 +502,6 @@ static int do_setlk(struct file *filp, int cmd, struct file_lock *fl) nfs_sync_mapping(filp->f_mapping); nfs_zap_caches(inode); out: - rpc_clnt_sigunmask(NFS_CLIENT(inode), &oldset); return status; } @@ -504,9 +516,7 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) inode->i_sb->s_id, inode->i_ino, fl->fl_type, fl->fl_flags, (long long)fl->fl_start, (long long)fl->fl_end); - - if (!inode) - return -EINVAL; + nfs_inc_stats(inode, NFSIOS_VFSLOCK); /* No mandatory locks over NFS */ if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID && @@ -525,15 +535,11 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) */ static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) { - struct inode * inode = filp->f_mapping->host; - dprintk("NFS: nfs_flock(f=%s/%ld, t=%x, fl=%x)\n", - inode->i_sb->s_id, inode->i_ino, + filp->f_path.dentry->d_inode->i_sb->s_id, + filp->f_path.dentry->d_inode->i_ino, fl->fl_type, fl->fl_flags); - if (!inode) - return -EINVAL; - /* * No BSD flocks over NFS allowed. * Note: we could try to fake a POSIX lock request here by