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fs/cifs/cifsfs.c
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/* * fs/cifs/cifsfs.c * |
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* Copyright (C) International Business Machines Corp., 2002,2008 |
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* Author(s): Steve French (sfrench@us.ibm.com) * * Common Internet FileSystem (CIFS) client * * This library is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published * by the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* Note that BB means BUGBUG (ie something to fix eventually) */ #include <linux/module.h> #include <linux/fs.h> #include <linux/mount.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/list.h> #include <linux/seq_file.h> #include <linux/vfs.h> #include <linux/mempool.h> |
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#include <linux/delay.h> |
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#include <linux/kthread.h> |
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#include <linux/freezer.h> |
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#include <linux/smp_lock.h> |
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#include "cifsfs.h" #include "cifspdu.h" #define DECLARE_GLOBALS_HERE #include "cifsglob.h" #include "cifsproto.h" #include "cifs_debug.h" #include "cifs_fs_sb.h" #include <linux/mm.h> |
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#include <linux/key-type.h> |
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#include "cifs_spnego.h" |
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#include "fscache.h" |
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#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
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int cifsFYI = 0; int cifsERROR = 1; int traceSMB = 0; unsigned int oplockEnabled = 1; unsigned int experimEnabled = 0; unsigned int linuxExtEnabled = 1; unsigned int lookupCacheEnabled = 1; unsigned int multiuser_mount = 0; |
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unsigned int global_secflags = CIFSSEC_DEF; |
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/* unsigned int ntlmv2_support = 0; */ |
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unsigned int sign_CIFS_PDUs = 1; |
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static const struct super_operations cifs_super_ops; |
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unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; module_param(CIFSMaxBufSize, int, 0); |
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MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " "Default: 16384 Range: 8192 to 130048"); |
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unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; module_param(cifs_min_rcv, int, 0); |
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MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " "1 to 64"); |
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unsigned int cifs_min_small = 30; module_param(cifs_min_small, int, 0); |
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MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " "Range: 2 to 256"); |
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unsigned int cifs_max_pending = CIFS_MAX_REQ; module_param(cifs_max_pending, int, 0); |
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MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " "Default: 50 Range: 2 to 256"); |
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extern mempool_t *cifs_sm_req_poolp; extern mempool_t *cifs_req_poolp; extern mempool_t *cifs_mid_poolp; |
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static int cifs_read_super(struct super_block *sb, void *data, const char *devname, int silent) { struct inode *inode; struct cifs_sb_info *cifs_sb; int rc = 0; |
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/* BB should we make this contingent on mount parm? */ sb->s_flags |= MS_NODIRATIME | MS_NOATIME; |
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sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
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cifs_sb = CIFS_SB(sb); |
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if (cifs_sb == NULL) |
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return -ENOMEM; |
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rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); if (rc) { kfree(cifs_sb); return rc; } |
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#ifdef CONFIG_CIFS_DFS_UPCALL /* copy mount params to sb for use in submounts */ /* BB: should we move this after the mount so we * do not have to do the copy on failed mounts? * BB: May be it is better to do simple copy before * complex operation (mount), and in case of fail * just exit instead of doing mount and attempting * undo it if this copy fails?*/ |
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if (data) { int len = strlen(data); cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); if (cifs_sb->mountdata == NULL) { |
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bdi_destroy(&cifs_sb->bdi); |
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kfree(sb->s_fs_info); sb->s_fs_info = NULL; return -ENOMEM; } strncpy(cifs_sb->mountdata, data, len + 1); cifs_sb->mountdata[len] = '\0'; |
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} |
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#endif |
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rc = cifs_mount(sb, cifs_sb, data, devname); if (rc) { if (!silent) |
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cERROR(1, "cifs_mount failed w/return code = %d", rc); |
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goto out_mount_failed; } sb->s_magic = CIFS_MAGIC_NUMBER; sb->s_op = &cifs_super_ops; |
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sb->s_bdi = &cifs_sb->bdi; |
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/* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) |
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sb->s_blocksize = cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ |
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sb->s_blocksize = CIFS_MAX_MSGSIZE; sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ |
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inode = cifs_root_iget(sb, ROOT_I); |
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if (IS_ERR(inode)) { rc = PTR_ERR(inode); inode = NULL; |
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goto out_no_root; } sb->s_root = d_alloc_root(inode); if (!sb->s_root) { rc = -ENOMEM; goto out_no_root; } |
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#ifdef CONFIG_CIFS_EXPERIMENTAL if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
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cFYI(1, "export ops supported"); |
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sb->s_export_op = &cifs_export_ops; } #endif /* EXPERIMENTAL */ |
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return 0; out_no_root: |
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cERROR(1, "cifs_read_super: get root inode failed"); |
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if (inode) iput(inode); |
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cifs_umount(sb, cifs_sb); |
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out_mount_failed: |
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if (cifs_sb) { |
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#ifdef CONFIG_CIFS_DFS_UPCALL if (cifs_sb->mountdata) { kfree(cifs_sb->mountdata); cifs_sb->mountdata = NULL; } #endif |
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unload_nls(cifs_sb->local_nls); |
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bdi_destroy(&cifs_sb->bdi); |
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kfree(cifs_sb); } return rc; } static void cifs_put_super(struct super_block *sb) { int rc = 0; struct cifs_sb_info *cifs_sb; |
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cFYI(1, "In cifs_put_super"); |
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cifs_sb = CIFS_SB(sb); |
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if (cifs_sb == NULL) { |
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cFYI(1, "Empty cifs superblock info passed to unmount"); |
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return; } |
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lock_kernel(); |
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rc = cifs_umount(sb, cifs_sb); |
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if (rc) |
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cERROR(1, "cifs_umount failed with return code %d", rc); |
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#ifdef CONFIG_CIFS_DFS_UPCALL if (cifs_sb->mountdata) { kfree(cifs_sb->mountdata); cifs_sb->mountdata = NULL; } #endif |
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unload_nls(cifs_sb->local_nls); |
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bdi_destroy(&cifs_sb->bdi); |
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kfree(cifs_sb); |
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unlock_kernel(); |
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} static int |
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cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
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{ |
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struct super_block *sb = dentry->d_sb; |
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct cifsTconInfo *tcon = cifs_sb->tcon; |
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int rc = -EOPNOTSUPP; |
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int xid; |
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xid = GetXid(); |
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buf->f_type = CIFS_MAGIC_NUMBER; |
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/* * PATH_MAX may be too long - it would presumably be total path, * but note that some servers (includinng Samba 3) have a shorter * maximum path. * * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. */ buf->f_namelen = PATH_MAX; |
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buf->f_files = 0; /* undefined */ buf->f_ffree = 0; /* unlimited */ |
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/* * We could add a second check for a QFS Unix capability bit */ if ((tcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); /* * Only need to call the old QFSInfo if failed on newer one, * e.g. by OS/2. **/ if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) rc = CIFSSMBQFSInfo(xid, tcon, buf); /* * Some old Windows servers also do not support level 103, retry with * older level one if old server failed the previous call or we * bypassed it because we detected that this was an older LANMAN sess */ |
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if (rc) |
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rc = SMBOldQFSInfo(xid, tcon, buf); |
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FreeXid(xid); |
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return 0; |
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} |
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static int cifs_permission(struct inode *inode, int mask) |
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{ struct cifs_sb_info *cifs_sb; cifs_sb = CIFS_SB(inode->i_sb); |
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { if ((mask & MAY_EXEC) && !execute_ok(inode)) return -EACCES; else return 0; } else /* file mode might have been restricted at mount time |
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on the client (above and beyond ACL on servers) for |
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servers which do not support setting and viewing mode bits, |
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so allowing client to check permissions is useful */ |
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return generic_permission(inode, mask, NULL); } |
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static struct kmem_cache *cifs_inode_cachep; static struct kmem_cache *cifs_req_cachep; static struct kmem_cache *cifs_mid_cachep; |
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static struct kmem_cache *cifs_sm_req_cachep; |
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mempool_t *cifs_sm_req_poolp; mempool_t *cifs_req_poolp; mempool_t *cifs_mid_poolp; static struct inode * cifs_alloc_inode(struct super_block *sb) { struct cifsInodeInfo *cifs_inode; |
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cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
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if (!cifs_inode) return NULL; cifs_inode->cifsAttrs = 0x20; /* default */ |
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cifs_inode->time = 0; |
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cifs_inode->write_behind_rc = 0; |
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/* Until the file is open and we have gotten oplock info back from the server, can not assume caching of file data or metadata */ |
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cifs_inode->clientCanCacheRead = false; cifs_inode->clientCanCacheAll = false; |
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cifs_inode->delete_pending = false; |
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cifs_inode->invalid_mapping = false; |
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cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
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cifs_inode->server_eof = 0; |
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/* Can not set i_flags here - they get immediately overwritten to zero by the VFS */ /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ |
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INIT_LIST_HEAD(&cifs_inode->openFileList); return &cifs_inode->vfs_inode; } static void cifs_destroy_inode(struct inode *inode) { kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); } |
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static void |
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cifs_evict_inode(struct inode *inode) |
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{ |
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truncate_inode_pages(&inode->i_data, 0); end_writeback(inode); |
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cifs_fscache_release_inode_cookie(inode); } static void |
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cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) { seq_printf(s, ",addr="); switch (server->addr.sockAddr.sin_family) { case AF_INET: seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr); break; case AF_INET6: seq_printf(s, "%pI6", &server->addr.sockAddr6.sin6_addr.s6_addr); if (server->addr.sockAddr6.sin6_scope_id) seq_printf(s, "%%%u", server->addr.sockAddr6.sin6_scope_id); break; default: seq_printf(s, "(unknown)"); } } |
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/* * cifs_show_options() is for displaying mount options in /proc/mounts. * Not all settable options are displayed but most of the important * ones are. */ static int cifs_show_options(struct seq_file *s, struct vfsmount *m) { |
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struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); struct cifsTconInfo *tcon = cifs_sb->tcon; |
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seq_printf(s, ",unc=%s", tcon->treeName); |
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if (tcon->ses->userName) seq_printf(s, ",username=%s", tcon->ses->userName); if (tcon->ses->domainName) seq_printf(s, ",domain=%s", tcon->ses->domainName); |
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seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) seq_printf(s, ",forceuid"); |
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else seq_printf(s, ",noforceuid"); |
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seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) seq_printf(s, ",forcegid"); |
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else seq_printf(s, ",noforcegid"); |
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cifs_show_address(s, tcon->ses->server); |
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if (!tcon->unix_ext) seq_printf(s, ",file_mode=0%o,dir_mode=0%o", |
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cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
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if (tcon->seal) seq_printf(s, ",seal"); if (tcon->nocase) seq_printf(s, ",nocase"); if (tcon->retry) seq_printf(s, ",hard"); if (cifs_sb->prepath) seq_printf(s, ",prepath=%s", cifs_sb->prepath); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) seq_printf(s, ",posixpaths"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) seq_printf(s, ",setuids"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) seq_printf(s, ",serverino"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) seq_printf(s, ",directio"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) seq_printf(s, ",nouser_xattr"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) seq_printf(s, ",mapchars"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) seq_printf(s, ",sfu"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) seq_printf(s, ",nobrl"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) seq_printf(s, ",cifsacl"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) seq_printf(s, ",dynperm"); if (m->mnt_sb->s_flags & MS_POSIXACL) seq_printf(s, ",acl"); seq_printf(s, ",rsize=%d", cifs_sb->rsize); seq_printf(s, ",wsize=%d", cifs_sb->wsize); |
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return 0; } |
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static void cifs_umount_begin(struct super_block *sb) |
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{ |
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
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struct cifsTconInfo *tcon; |
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if (cifs_sb == NULL) |
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return; tcon = cifs_sb->tcon; |
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if (tcon == NULL) |
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return; |
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read_lock(&cifs_tcp_ses_lock); |
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if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { /* we have other mounts to same share or we have already tried to force umount this and woken up all waiting network requests, nothing to do */ read_unlock(&cifs_tcp_ses_lock); return; } else if (tcon->tc_count == 1) |
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tcon->tidStatus = CifsExiting; |
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read_unlock(&cifs_tcp_ses_lock); |
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/* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
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/* cancel_notify_requests(tcon); */ |
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if (tcon->ses && tcon->ses->server) { |
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cFYI(1, "wake up tasks now - umount begin not complete"); |
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wake_up_all(&tcon->ses->server->request_q); |
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wake_up_all(&tcon->ses->server->response_q); msleep(1); /* yield */ /* we have to kick the requests once more */ wake_up_all(&tcon->ses->server->response_q); msleep(1); |
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} |
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return; } |
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#ifdef CONFIG_CIFS_STATS2 static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) { /* BB FIXME */ return 0; } #endif |
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static int cifs_remount(struct super_block *sb, int *flags, char *data) { *flags |= MS_NODIRATIME; return 0; } |
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static int cifs_drop_inode(struct inode *inode) |
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{ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
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/* no serverino => unconditional eviction */ return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || generic_drop_inode(inode); |
12420ac34
|
469 |
} |
ee9b6d61a
|
470 |
static const struct super_operations cifs_super_ops = { |
1da177e4c
|
471 472 473 474 |
.put_super = cifs_put_super, .statfs = cifs_statfs, .alloc_inode = cifs_alloc_inode, .destroy_inode = cifs_destroy_inode, |
12420ac34
|
475 |
.drop_inode = cifs_drop_inode, |
b57922d97
|
476 |
.evict_inode = cifs_evict_inode, |
12420ac34
|
477 478 |
/* .delete_inode = cifs_delete_inode, */ /* Do not need above function unless later we add lazy close of inodes or unless the |
50c2f7538
|
479 480 |
kernel forgets to call us with the same number of releases (closes) as opens */ |
1da177e4c
|
481 |
.show_options = cifs_show_options, |
7b7abfe3d
|
482 |
.umount_begin = cifs_umount_begin, |
1da177e4c
|
483 |
.remount_fs = cifs_remount, |
bf97d2871
|
484 |
#ifdef CONFIG_CIFS_STATS2 |
f46d3e119
|
485 |
.show_stats = cifs_show_stats, |
bf97d2871
|
486 |
#endif |
1da177e4c
|
487 |
}; |
454e2398b
|
488 |
static int |
1da177e4c
|
489 |
cifs_get_sb(struct file_system_type *fs_type, |
454e2398b
|
490 |
int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
1da177e4c
|
491 492 493 |
{ int rc; struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); |
b6b38f704
|
494 |
cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4c
|
495 496 |
if (IS_ERR(sb)) |
454e2398b
|
497 |
return PTR_ERR(sb); |
1da177e4c
|
498 499 |
sb->s_flags = flags; |
9b04c997b
|
500 |
rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4c
|
501 |
if (rc) { |
6f5bbff9a
|
502 |
deactivate_locked_super(sb); |
454e2398b
|
503 |
return rc; |
1da177e4c
|
504 505 |
} sb->s_flags |= MS_ACTIVE; |
a3ec947c8
|
506 507 |
simple_set_mnt(mnt, sb); return 0; |
1da177e4c
|
508 |
} |
027445c37
|
509 510 |
static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos) |
1da177e4c
|
511 |
{ |
e6a002964
|
512 |
struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4c
|
513 |
ssize_t written; |
027445c37
|
514 |
written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
87c89dd73
|
515 516 |
if (!CIFS_I(inode)->clientCanCacheAll) filemap_fdatawrite(inode->i_mapping); |
1da177e4c
|
517 518 |
return written; } |
c32a0b689
|
519 520 521 |
static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) { /* origin == SEEK_END => we must revalidate the cached file length */ |
0889a9441
|
522 |
if (origin == SEEK_END) { |
030e9d814
|
523 524 525 526 527 |
int retval; /* some applications poll for the file length in this strange way so we must seek to end on non-oplocked files by setting the revalidate time to zero */ |
c33f8d327
|
528 |
CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d814
|
529 |
|
abab095d1
|
530 |
retval = cifs_revalidate_file(file); |
c32a0b689
|
531 532 533 |
if (retval < 0) return (loff_t)retval; } |
9465efc9e
|
534 |
return generic_file_llseek_unlocked(file, offset, origin); |
c32a0b689
|
535 |
} |
84210e912
|
536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 |
static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) { /* note that this is called by vfs setlease with the BKL held although I doubt that BKL is needed here in cifs */ struct inode *inode = file->f_path.dentry->d_inode; if (!(S_ISREG(inode->i_mode))) return -EINVAL; /* check if file is oplocked */ if (((arg == F_RDLCK) && (CIFS_I(inode)->clientCanCacheRead)) || ((arg == F_WRLCK) && (CIFS_I(inode)->clientCanCacheAll))) return generic_setlease(file, arg, lease); else if (CIFS_SB(inode->i_sb)->tcon->local_lease && !CIFS_I(inode)->clientCanCacheRead) /* If the server claims to support oplock on this file, then we still need to check oplock even if the local_lease mount option is set, but there are servers which do not support oplock for which this mount option may be useful if the user knows that the file won't be changed on the server by anyone else */ return generic_setlease(file, arg, lease); else return -EAGAIN; } |
84210e912
|
564 |
|
e6ab15827
|
565 |
struct file_system_type cifs_fs_type = { |
1da177e4c
|
566 567 568 569 570 571 |
.owner = THIS_MODULE, .name = "cifs", .get_sb = cifs_get_sb, .kill_sb = kill_anon_super, /* .fs_flags */ }; |
754661f14
|
572 |
const struct inode_operations cifs_dir_inode_ops = { |
1da177e4c
|
573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 |
.create = cifs_create, .lookup = cifs_lookup, .getattr = cifs_getattr, .unlink = cifs_unlink, .link = cifs_hardlink, .mkdir = cifs_mkdir, .rmdir = cifs_rmdir, .rename = cifs_rename, .permission = cifs_permission, /* revalidate:cifs_revalidate, */ .setattr = cifs_setattr, .symlink = cifs_symlink, .mknod = cifs_mknod, #ifdef CONFIG_CIFS_XATTR .setxattr = cifs_setxattr, .getxattr = cifs_getxattr, .listxattr = cifs_listxattr, .removexattr = cifs_removexattr, #endif }; |
754661f14
|
593 |
const struct inode_operations cifs_file_inode_ops = { |
1da177e4c
|
594 595 596 597 598 599 600 601 602 603 |
/* revalidate:cifs_revalidate, */ .setattr = cifs_setattr, .getattr = cifs_getattr, /* do we need this anymore? */ .rename = cifs_rename, .permission = cifs_permission, #ifdef CONFIG_CIFS_XATTR .setxattr = cifs_setxattr, .getxattr = cifs_getxattr, .listxattr = cifs_listxattr, .removexattr = cifs_removexattr, |
50c2f7538
|
604 |
#endif |
1da177e4c
|
605 |
}; |
754661f14
|
606 |
const struct inode_operations cifs_symlink_inode_ops = { |
50c2f7538
|
607 |
.readlink = generic_readlink, |
1da177e4c
|
608 609 610 611 612 613 614 615 616 617 618 |
.follow_link = cifs_follow_link, .put_link = cifs_put_link, .permission = cifs_permission, /* BB add the following two eventually */ /* revalidate: cifs_revalidate, setattr: cifs_notify_change, *//* BB do we need notify change */ #ifdef CONFIG_CIFS_XATTR .setxattr = cifs_setxattr, .getxattr = cifs_getxattr, .listxattr = cifs_listxattr, .removexattr = cifs_removexattr, |
50c2f7538
|
619 |
#endif |
1da177e4c
|
620 |
}; |
4b6f5d20b
|
621 |
const struct file_operations cifs_file_ops = { |
87c89dd73
|
622 623 |
.read = do_sync_read, .write = do_sync_write, |
87c89dd73
|
624 625 |
.aio_read = generic_file_aio_read, .aio_write = cifs_file_aio_write, |
1da177e4c
|
626 627 628 629 630 631 |
.open = cifs_open, .release = cifs_close, .lock = cifs_lock, .fsync = cifs_fsync, .flush = cifs_flush, .mmap = cifs_file_mmap, |
5ffc4ef45
|
632 |
.splice_read = generic_file_splice_read, |
c32a0b689
|
633 |
.llseek = cifs_llseek, |
c67593a03
|
634 |
#ifdef CONFIG_CIFS_POSIX |
f9ddcca4c
|
635 |
.unlocked_ioctl = cifs_ioctl, |
c67593a03
|
636 |
#endif /* CONFIG_CIFS_POSIX */ |
84210e912
|
637 |
.setlease = cifs_setlease, |
1da177e4c
|
638 |
}; |
4b6f5d20b
|
639 |
const struct file_operations cifs_file_direct_ops = { |
a994b8fa6
|
640 |
/* no aio, no readv - |
1da177e4c
|
641 642 643 644 645 646 647 648 |
BB reevaluate whether they can be done with directio, no cache */ .read = cifs_user_read, .write = cifs_user_write, .open = cifs_open, .release = cifs_close, .lock = cifs_lock, .fsync = cifs_fsync, .flush = cifs_flush, |
a994b8fa6
|
649 |
.mmap = cifs_file_mmap, |
5ffc4ef45
|
650 |
.splice_read = generic_file_splice_read, |
c67593a03
|
651 |
#ifdef CONFIG_CIFS_POSIX |
f9ddcca4c
|
652 |
.unlocked_ioctl = cifs_ioctl, |
c67593a03
|
653 |
#endif /* CONFIG_CIFS_POSIX */ |
c32a0b689
|
654 |
.llseek = cifs_llseek, |
84210e912
|
655 |
.setlease = cifs_setlease, |
1da177e4c
|
656 |
}; |
4b6f5d20b
|
657 |
const struct file_operations cifs_file_nobrl_ops = { |
87c89dd73
|
658 659 |
.read = do_sync_read, .write = do_sync_write, |
87c89dd73
|
660 661 662 663 664 665 666 |
.aio_read = generic_file_aio_read, .aio_write = cifs_file_aio_write, .open = cifs_open, .release = cifs_close, .fsync = cifs_fsync, .flush = cifs_flush, .mmap = cifs_file_mmap, |
5ffc4ef45
|
667 |
.splice_read = generic_file_splice_read, |
c32a0b689
|
668 |
.llseek = cifs_llseek, |
8b94bcb92
|
669 |
#ifdef CONFIG_CIFS_POSIX |
f9ddcca4c
|
670 |
.unlocked_ioctl = cifs_ioctl, |
8b94bcb92
|
671 |
#endif /* CONFIG_CIFS_POSIX */ |
84210e912
|
672 |
.setlease = cifs_setlease, |
8b94bcb92
|
673 |
}; |
4b6f5d20b
|
674 |
const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f7538
|
675 |
/* no mmap, no aio, no readv - |
87c89dd73
|
676 677 678 679 680 681 682 |
BB reevaluate whether they can be done with directio, no cache */ .read = cifs_user_read, .write = cifs_user_write, .open = cifs_open, .release = cifs_close, .fsync = cifs_fsync, .flush = cifs_flush, |
810627a01
|
683 |
.mmap = cifs_file_mmap, |
5ffc4ef45
|
684 |
.splice_read = generic_file_splice_read, |
8b94bcb92
|
685 |
#ifdef CONFIG_CIFS_POSIX |
f9ddcca4c
|
686 |
.unlocked_ioctl = cifs_ioctl, |
8b94bcb92
|
687 |
#endif /* CONFIG_CIFS_POSIX */ |
c32a0b689
|
688 |
.llseek = cifs_llseek, |
84210e912
|
689 |
.setlease = cifs_setlease, |
8b94bcb92
|
690 |
}; |
1da177e4c
|
691 |
|
4b6f5d20b
|
692 |
const struct file_operations cifs_dir_ops = { |
1da177e4c
|
693 694 695 |
.readdir = cifs_readdir, .release = cifs_closedir, .read = generic_read_dir, |
f9ddcca4c
|
696 |
.unlocked_ioctl = cifs_ioctl, |
3222a3e55
|
697 |
.llseek = generic_file_llseek, |
1da177e4c
|
698 699 700 |
}; static void |
51cc50685
|
701 |
cifs_init_once(void *inode) |
1da177e4c
|
702 703 |
{ struct cifsInodeInfo *cifsi = inode; |
a35afb830
|
704 705 |
inode_init_once(&cifsi->vfs_inode); INIT_LIST_HEAD(&cifsi->lockList); |
1da177e4c
|
706 707 708 709 710 711 |
} static int cifs_init_inodecache(void) { cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", |
26f57364d
|
712 |
sizeof(struct cifsInodeInfo), |
fffb60f93
|
713 714 |
0, (SLAB_RECLAIM_ACCOUNT| SLAB_MEM_SPREAD), |
20c2df83d
|
715 |
cifs_init_once); |
1da177e4c
|
716 717 718 719 720 721 722 723 724 |
if (cifs_inode_cachep == NULL) return -ENOMEM; return 0; } static void cifs_destroy_inodecache(void) { |
1a1d92c10
|
725 |
kmem_cache_destroy(cifs_inode_cachep); |
1da177e4c
|
726 727 728 729 730 |
} static int cifs_init_request_bufs(void) { |
4523cc304
|
731 |
if (CIFSMaxBufSize < 8192) { |
1da177e4c
|
732 733 734 735 736 737 738 739 |
/* Buffer size can not be smaller than 2 * PATH_MAX since maximum Unicode path name has to fit in any SMB/CIFS path based frames */ CIFSMaxBufSize = 8192; } else if (CIFSMaxBufSize > 1024*127) { CIFSMaxBufSize = 1024 * 127; } else { CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ } |
b6b38f704
|
740 |
/* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4c
|
741 742 743 |
cifs_req_cachep = kmem_cache_create("cifs_request", CIFSMaxBufSize + MAX_CIFS_HDR_SIZE, 0, |
20c2df83d
|
744 |
SLAB_HWCACHE_ALIGN, NULL); |
1da177e4c
|
745 746 |
if (cifs_req_cachep == NULL) return -ENOMEM; |
4523cc304
|
747 |
if (cifs_min_rcv < 1) |
1da177e4c
|
748 749 750 |
cifs_min_rcv = 1; else if (cifs_min_rcv > 64) { cifs_min_rcv = 64; |
b6b38f704
|
751 |
cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4c
|
752 |
} |
93d2341c7
|
753 754 |
cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, cifs_req_cachep); |
1da177e4c
|
755 |
|
4523cc304
|
756 |
if (cifs_req_poolp == NULL) { |
1da177e4c
|
757 758 759 |
kmem_cache_destroy(cifs_req_cachep); return -ENOMEM; } |
ec637e3ff
|
760 |
/* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4c
|
761 762 |
almost all handle based requests (but not write response, nor is it sufficient for path based requests). A smaller size would have |
50c2f7538
|
763 |
been more efficient (compacting multiple slab items on one 4k page) |
1da177e4c
|
764 765 |
for the case in which debug was on, but this larger size allows more SMBs to use small buffer alloc and is still much more |
6dc0f87e3
|
766 |
efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4c
|
767 768 |
alloc of large cifs buffers even when page debugging is on */ cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", |
6dc0f87e3
|
769 |
MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83d
|
770 |
NULL); |
1da177e4c
|
771 772 773 |
if (cifs_sm_req_cachep == NULL) { mempool_destroy(cifs_req_poolp); kmem_cache_destroy(cifs_req_cachep); |
6dc0f87e3
|
774 |
return -ENOMEM; |
1da177e4c
|
775 |
} |
4523cc304
|
776 |
if (cifs_min_small < 2) |
1da177e4c
|
777 778 779 |
cifs_min_small = 2; else if (cifs_min_small > 256) { cifs_min_small = 256; |
b6b38f704
|
780 |
cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4c
|
781 |
} |
93d2341c7
|
782 783 |
cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, cifs_sm_req_cachep); |
1da177e4c
|
784 |
|
4523cc304
|
785 |
if (cifs_sm_req_poolp == NULL) { |
1da177e4c
|
786 787 788 789 790 791 792 793 794 795 796 797 798 |
mempool_destroy(cifs_req_poolp); kmem_cache_destroy(cifs_req_cachep); kmem_cache_destroy(cifs_sm_req_cachep); return -ENOMEM; } return 0; } static void cifs_destroy_request_bufs(void) { mempool_destroy(cifs_req_poolp); |
1a1d92c10
|
799 |
kmem_cache_destroy(cifs_req_cachep); |
1da177e4c
|
800 |
mempool_destroy(cifs_sm_req_poolp); |
1a1d92c10
|
801 |
kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4c
|
802 803 804 805 806 807 |
} static int cifs_init_mids(void) { cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", |
26f57364d
|
808 809 |
sizeof(struct mid_q_entry), 0, SLAB_HWCACHE_ALIGN, NULL); |
1da177e4c
|
810 811 |
if (cifs_mid_cachep == NULL) return -ENOMEM; |
93d2341c7
|
812 813 |
/* 3 is a reasonable minimum number of simultaneous operations */ cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); |
4523cc304
|
814 |
if (cifs_mid_poolp == NULL) { |
1da177e4c
|
815 816 817 |
kmem_cache_destroy(cifs_mid_cachep); return -ENOMEM; } |
1da177e4c
|
818 819 820 821 822 823 824 |
return 0; } static void cifs_destroy_mids(void) { mempool_destroy(cifs_mid_poolp); |
1a1d92c10
|
825 |
kmem_cache_destroy(cifs_mid_cachep); |
1da177e4c
|
826 |
} |
1da177e4c
|
827 828 829 830 |
static int __init init_cifs(void) { int rc = 0; |
1da177e4c
|
831 |
cifs_proc_init(); |
e7ddee903
|
832 |
INIT_LIST_HEAD(&cifs_tcp_ses_list); |
4ca9c190d
|
833 834 835 |
#ifdef CONFIG_CIFS_EXPERIMENTAL INIT_LIST_HEAD(&GlobalDnotifyReqList); INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); |
6dc0f87e3
|
836 |
#endif |
1da177e4c
|
837 838 839 840 841 |
/* * Initialize Global counters */ atomic_set(&sesInfoAllocCount, 0); atomic_set(&tconInfoAllocCount, 0); |
6dc0f87e3
|
842 |
atomic_set(&tcpSesAllocCount, 0); |
1da177e4c
|
843 844 845 846 |
atomic_set(&tcpSesReconnectCount, 0); atomic_set(&tconInfoReconnectCount, 0); atomic_set(&bufAllocCount, 0); |
4498eed50
|
847 848 849 850 851 |
atomic_set(&smBufAllocCount, 0); #ifdef CONFIG_CIFS_STATS2 atomic_set(&totBufAllocCount, 0); atomic_set(&totSmBufAllocCount, 0); #endif /* CONFIG_CIFS_STATS2 */ |
1da177e4c
|
852 853 854 855 |
atomic_set(&midCount, 0); GlobalCurrentXid = 0; GlobalTotalActiveXid = 0; GlobalMaxActiveXid = 0; |
2cd646a2d
|
856 |
memset(Local_System_Name, 0, 15); |
1da177e4c
|
857 |
rwlock_init(&GlobalSMBSeslock); |
e7ddee903
|
858 |
rwlock_init(&cifs_tcp_ses_lock); |
1da177e4c
|
859 |
spin_lock_init(&GlobalMid_Lock); |
4523cc304
|
860 |
if (cifs_max_pending < 2) { |
1da177e4c
|
861 |
cifs_max_pending = 2; |
b6b38f704
|
862 |
cFYI(1, "cifs_max_pending set to min of 2"); |
4523cc304
|
863 |
} else if (cifs_max_pending > 256) { |
1da177e4c
|
864 |
cifs_max_pending = 256; |
b6b38f704
|
865 |
cFYI(1, "cifs_max_pending set to max of 256"); |
1da177e4c
|
866 |
} |
f579cf3cf
|
867 868 869 |
rc = cifs_fscache_register(); if (rc) goto out; |
1da177e4c
|
870 |
rc = cifs_init_inodecache(); |
45af7a0f2
|
871 872 873 874 875 876 877 878 879 880 881 882 883 884 |
if (rc) goto out_clean_proc; rc = cifs_init_mids(); if (rc) goto out_destroy_inodecache; rc = cifs_init_request_bufs(); if (rc) goto out_destroy_mids; rc = register_filesystem(&cifs_fs_type); if (rc) goto out_destroy_request_bufs; |
84a15b935
|
885 886 887 888 889 |
#ifdef CONFIG_CIFS_UPCALL rc = register_key_type(&cifs_spnego_key_type); if (rc) goto out_unregister_filesystem; #endif |
45af7a0f2
|
890 |
|
45af7a0f2
|
891 |
return 0; |
84a15b935
|
892 |
#ifdef CONFIG_CIFS_UPCALL |
45af7a0f2
|
893 894 |
out_unregister_filesystem: unregister_filesystem(&cifs_fs_type); |
1fc7995d1
|
895 |
#endif |
45af7a0f2
|
896 897 898 899 900 901 902 |
out_destroy_request_bufs: cifs_destroy_request_bufs(); out_destroy_mids: cifs_destroy_mids(); out_destroy_inodecache: cifs_destroy_inodecache(); out_clean_proc: |
1da177e4c
|
903 |
cifs_proc_clean(); |
f579cf3cf
|
904 905 |
cifs_fscache_unregister(); out: |
1da177e4c
|
906 907 908 909 910 911 |
return rc; } static void __exit exit_cifs(void) { |
b6b38f704
|
912 |
cFYI(DBG2, "exit_cifs"); |
1da177e4c
|
913 |
cifs_proc_clean(); |
f579cf3cf
|
914 |
cifs_fscache_unregister(); |
6103335de
|
915 |
#ifdef CONFIG_CIFS_DFS_UPCALL |
78d31a3a8
|
916 |
cifs_dfs_release_automount_timer(); |
6103335de
|
917 |
#endif |
84a15b935
|
918 919 920 |
#ifdef CONFIG_CIFS_UPCALL unregister_key_type(&cifs_spnego_key_type); #endif |
1da177e4c
|
921 922 923 924 |
unregister_filesystem(&cifs_fs_type); cifs_destroy_inodecache(); cifs_destroy_mids(); cifs_destroy_request_bufs(); |
1da177e4c
|
925 926 927 |
} MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); |
6dc0f87e3
|
928 |
MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4c
|
929 |
MODULE_DESCRIPTION |
63135e088
|
930 931 |
("VFS to access servers complying with the SNIA CIFS Specification " "e.g. Samba and Windows"); |
1da177e4c
|
932 933 934 |
MODULE_VERSION(CIFS_VERSION); module_init(init_cifs) module_exit(exit_cifs) |