From df2cf170c823ba779ca339e3ede347c87f4dc6a9 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 12 Feb 2010 07:44:16 -0500 Subject: cifs: overhaul cifs_revalidate and rename to cifs_revalidate_dentry cifs_revalidate is renamed to cifs_revalidate_dentry as a later patch will add a by-filehandle variant. Add a new "invalid_mapping" flag to the cifsInodeInfo that indicates that the pagecache is considered invalid. Add a new routine to check inode attributes whenever they're updated and set that flag if the inode has changed on the server. cifs_revalidate_dentry is then changed to just update the attrcache if needed and then to zap the pagecache if it's not valid. There are some other behavior changes in here as well. Open files are now allowed to have their caches invalidated. I see no reason why we'd want to keep stale data around just because a file is open. Also, cifs_revalidate_cache uses the server_eof for revalidating the file size since that should more closely match the size of the file on the server. Signed-off-by: Jeff Layton Signed-off-by: Steve French diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 8c6a036..cf85a41 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -312,6 +312,7 @@ cifs_alloc_inode(struct super_block *sb) cifs_inode->clientCanCacheRead = false; cifs_inode->clientCanCacheAll = false; cifs_inode->delete_pending = false; + cifs_inode->invalid_mapping = false; cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ cifs_inode->server_eof = 0; @@ -638,7 +639,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) setting the revalidate time to zero */ CIFS_I(file->f_path.dentry->d_inode)->time = 0; - retval = cifs_revalidate(file->f_path.dentry); + retval = cifs_revalidate_dentry(file->f_path.dentry); if (retval < 0) return (loff_t)retval; } diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 78c1b86..2af995c 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -61,7 +61,7 @@ extern int cifs_mkdir(struct inode *, struct dentry *, int); extern int cifs_rmdir(struct inode *, struct dentry *); extern int cifs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); -extern int cifs_revalidate(struct dentry *); +extern int cifs_revalidate_dentry(struct dentry *); extern int cifs_getattr(struct vfsmount *, struct dentry *, struct kstat *); extern int cifs_setattr(struct dentry *, struct iattr *); diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index a1c817e..63c89d1 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -389,6 +389,7 @@ struct cifsInodeInfo { bool clientCanCacheRead:1; /* read oplock */ bool clientCanCacheAll:1; /* read and writebehind oplock */ bool delete_pending:1; /* DELETE_ON_CLOSE is set */ + bool invalid_mapping:1; /* pagecache is invalid */ u64 server_eof; /* current file size on server */ u64 uniqueid; /* server inode number */ struct inode vfs_inode; diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index 6ccf726..e9f7ecc 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -739,7 +739,7 @@ cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) int isValid = 1; if (direntry->d_inode) { - if (cifs_revalidate(direntry)) + if (cifs_revalidate_dentry(direntry)) return 0; } else { cFYI(1, ("neg dentry 0x%p name = %s", diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 3d8f8a9..b90f8f2 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1894,7 +1894,7 @@ int cifs_file_mmap(struct file *file, struct vm_area_struct *vma) int rc, xid; xid = GetXid(); - rc = cifs_revalidate(dentry); + rc = cifs_revalidate_dentry(dentry); if (rc) { cFYI(1, ("Validation prior to mmap failed, error=%d", rc)); FreeXid(xid); diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 8bdbc81..f050dba 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -77,6 +77,41 @@ static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral) } } +/* check inode attributes against fattr. If they don't match, tag the + * inode for cache invalidation + */ +static void +cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) +{ + struct cifsInodeInfo *cifs_i = CIFS_I(inode); + + cFYI(1, ("%s: revalidating inode %llu", __func__, cifs_i->uniqueid)); + + if (inode->i_state & I_NEW) { + cFYI(1, ("%s: inode %llu is new", __func__, cifs_i->uniqueid)); + return; + } + + /* don't bother with revalidation if we have an oplock */ + if (cifs_i->clientCanCacheRead) { + cFYI(1, ("%s: inode %llu is oplocked", __func__, + cifs_i->uniqueid)); + return; + } + + /* revalidate if mtime or size have changed */ + if (timespec_equal(&inode->i_mtime, &fattr->cf_mtime) && + cifs_i->server_eof == fattr->cf_eof) { + cFYI(1, ("%s: inode %llu is unchanged", __func__, + cifs_i->uniqueid)); + return; + } + + cFYI(1, ("%s: invalidating inode %llu mapping", __func__, + cifs_i->uniqueid)); + cifs_i->invalid_mapping = true; +} + /* populate an inode with info from a cifs_fattr struct */ void cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) @@ -85,6 +120,8 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); unsigned long oldtime = cifs_i->time; + cifs_revalidate_cache(inode, fattr); + inode->i_atime = fattr->cf_atime; inode->i_mtime = fattr->cf_mtime; inode->i_ctime = fattr->cf_ctime; @@ -1389,135 +1426,83 @@ cifs_rename_exit: return rc; } -int cifs_revalidate(struct dentry *direntry) +static bool +cifs_inode_needs_reval(struct inode *inode) { - int xid; - int rc = 0, wbrc = 0; - char *full_path; - struct cifs_sb_info *cifs_sb; - struct cifsInodeInfo *cifsInode; - loff_t local_size; - struct timespec local_mtime; - bool invalidate_inode = false; + struct cifsInodeInfo *cifs_i = CIFS_I(inode); - if (direntry->d_inode == NULL) - return -ENOENT; + if (cifs_i->clientCanCacheRead) + return false; - cifsInode = CIFS_I(direntry->d_inode); + if (!lookupCacheEnabled) + return true; - if (cifsInode == NULL) - return -ENOENT; + if (cifs_i->time == 0) + return true; - /* no sense revalidating inode info on file that no one can write */ - if (CIFS_I(direntry->d_inode)->clientCanCacheRead) - return rc; + /* FIXME: the actimeo should be tunable */ + if (time_after_eq(jiffies, cifs_i->time + HZ)) + return true; + + return false; +} + +/* check invalid_mapping flag and zap the cache if it's set */ +static void +cifs_invalidate_mapping(struct inode *inode) +{ + int rc; + struct cifsInodeInfo *cifs_i = CIFS_I(inode); + + cifs_i->invalid_mapping = false; + + /* write back any cached data */ + if (inode->i_mapping && inode->i_mapping->nrpages != 0) { + rc = filemap_write_and_wait(inode->i_mapping); + if (rc) + cifs_i->write_behind_rc = rc; + } + invalidate_remote_inode(inode); +} + +/* revalidate a dentry's inode attributes */ +int cifs_revalidate_dentry(struct dentry *dentry) +{ + int xid; + int rc = 0; + char *full_path = NULL; + struct inode *inode = dentry->d_inode; + struct super_block *sb = dentry->d_sb; + + if (inode == NULL) + return -ENOENT; xid = GetXid(); - cifs_sb = CIFS_SB(direntry->d_sb); + if (!cifs_inode_needs_reval(inode)) + goto check_inval; /* can not safely grab the rename sem here if rename calls revalidate since that would deadlock */ - full_path = build_path_from_dentry(direntry); + full_path = build_path_from_dentry(dentry); if (full_path == NULL) { rc = -ENOMEM; - FreeXid(xid); - return rc; + goto check_inval; } - cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " - "jiffies %ld", full_path, direntry->d_inode, - direntry->d_inode->i_count.counter, direntry, - direntry->d_time, jiffies)); - - if (cifsInode->time == 0) { - /* was set to zero previously to force revalidate */ - } else if (time_before(jiffies, cifsInode->time + HZ) && - lookupCacheEnabled) { - if ((S_ISREG(direntry->d_inode->i_mode) == 0) || - (direntry->d_inode->i_nlink == 1)) { - kfree(full_path); - FreeXid(xid); - return rc; - } else { - cFYI(1, ("Have to revalidate file due to hardlinks")); - } - } - - /* save mtime and size */ - local_mtime = direntry->d_inode->i_mtime; - local_size = direntry->d_inode->i_size; - if (cifs_sb->tcon->unix_ext) { - rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, - direntry->d_sb, xid); - if (rc) { - cFYI(1, ("error on getting revalidate info %d", rc)); -/* if (rc != -ENOENT) - rc = 0; */ /* BB should we cache info on - certain errors? */ - } - } else { - rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, - direntry->d_sb, xid, NULL); - if (rc) { - cFYI(1, ("error on getting revalidate info %d", rc)); -/* if (rc != -ENOENT) - rc = 0; */ /* BB should we cache info on - certain errors? */ - } - } - /* should we remap certain errors, access denied?, to zero */ - - /* if not oplocked, we invalidate inode pages if mtime or file size - had changed on server */ + cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " + "jiffies %ld", full_path, inode, inode->i_count.counter, + dentry, dentry->d_time, jiffies)); - if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) && - (local_size == direntry->d_inode->i_size)) { - cFYI(1, ("cifs_revalidate - inode unchanged")); - } else { - /* file may have changed on server */ - if (cifsInode->clientCanCacheRead) { - /* no need to invalidate inode pages since we were the - only ones who could have modified the file and the - server copy is staler than ours */ - } else { - invalidate_inode = true; - } - } + if (CIFS_SB(sb)->tcon->unix_ext) + rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); + else + rc = cifs_get_inode_info(&inode, full_path, NULL, sb, + xid, NULL); - /* can not grab this sem since kernel filesys locking documentation - indicates i_mutex may be taken by the kernel on lookup and rename - which could deadlock if we grab the i_mutex here as well */ -/* mutex_lock(&direntry->d_inode->i_mutex);*/ - /* need to write out dirty pages here */ - if (direntry->d_inode->i_mapping) { - /* do we need to lock inode until after invalidate completes - below? */ - wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping); - if (wbrc) - CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; - } - if (invalidate_inode) { - /* shrink_dcache not necessary now that cifs dentry ops - are exported for negative dentries */ -/* if (S_ISDIR(direntry->d_inode->i_mode)) - shrink_dcache_parent(direntry); */ - if (S_ISREG(direntry->d_inode->i_mode)) { - if (direntry->d_inode->i_mapping) { - wbrc = filemap_fdatawait(direntry->d_inode->i_mapping); - if (wbrc) - CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; - } - /* may eventually have to do this for open files too */ - if (list_empty(&(cifsInode->openFileList))) { - /* changed on server - flush read ahead pages */ - cFYI(1, ("Invalidating read ahead data on " - "closed file")); - invalidate_remote_inode(direntry->d_inode); - } - } - } -/* mutex_unlock(&direntry->d_inode->i_mutex); */ +check_inval: + if (CIFS_I(inode)->invalid_mapping) + cifs_invalidate_mapping(inode); kfree(full_path); FreeXid(xid); @@ -1527,7 +1512,7 @@ int cifs_revalidate(struct dentry *direntry) int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { - int err = cifs_revalidate(dentry); + int err = cifs_revalidate_dentry(dentry); if (!err) { generic_fillattr(dentry->d_inode, stat); stat->blksize = CIFS_MAX_MSGSIZE; -- cgit v0.10.2 From bcd5357f430363376565d07ca542127d6d36602c Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 12 Feb 2010 07:44:16 -0500 Subject: cifs: add a CIFSSMBQFileInfo function ...to get inode attributes via filehandle instead of by path. In some places, we need to revalidate an inode on an open filehandle, but we can't necessarily guarantee that the dentry associated with it will still be valid. When we have an open filehandle already, it makes more sense to do a filehandle based operation anyway. Signed-off-by: Jeff Layton Signed-off-by: Steve French diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 88e2bc4..bf2bff1 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -142,6 +142,8 @@ extern int CIFSFindNext(const int xid, struct cifsTconInfo *tcon, extern int CIFSFindClose(const int, struct cifsTconInfo *tcon, const __u16 search_handle); +extern int CIFSSMBQFileInfo(const int xid, struct cifsTconInfo *tcon, + u16 netfid, FILE_ALL_INFO *pFindData); extern int CIFSSMBQPathInfo(const int xid, struct cifsTconInfo *tcon, const unsigned char *searchName, FILE_ALL_INFO *findData, diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 9d17df3..4ed9782 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -3230,8 +3230,72 @@ QInfRetry: return rc; } +int +CIFSSMBQFileInfo(const int xid, struct cifsTconInfo *tcon, + u16 netfid, FILE_ALL_INFO *pFindData) +{ + struct smb_t2_qfi_req *pSMB = NULL; + struct smb_t2_qfi_rsp *pSMBr = NULL; + int rc = 0; + int bytes_returned; + __u16 params, byte_count; + +QFileInfoRetry: + rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, + (void **) &pSMBr); + if (rc) + return rc; + + params = 2 /* level */ + 2 /* fid */; + pSMB->t2.TotalDataCount = 0; + pSMB->t2.MaxParameterCount = cpu_to_le16(4); + /* BB find exact max data count below from sess structure BB */ + pSMB->t2.MaxDataCount = cpu_to_le16(CIFSMaxBufSize); + pSMB->t2.MaxSetupCount = 0; + pSMB->t2.Reserved = 0; + pSMB->t2.Flags = 0; + pSMB->t2.Timeout = 0; + pSMB->t2.Reserved2 = 0; + pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req, + Fid) - 4); + pSMB->t2.DataCount = 0; + pSMB->t2.DataOffset = 0; + pSMB->t2.SetupCount = 1; + pSMB->t2.Reserved3 = 0; + pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION); + byte_count = params + 1 /* pad */ ; + pSMB->t2.TotalParameterCount = cpu_to_le16(params); + pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount; + pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_ALL_INFO); + pSMB->Pad = 0; + pSMB->Fid = netfid; + pSMB->hdr.smb_buf_length += byte_count; + + rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, + (struct smb_hdr *) pSMBr, &bytes_returned, 0); + if (rc) { + cFYI(1, ("Send error in QPathInfo = %d", rc)); + } else { /* decode response */ + rc = validate_t2((struct smb_t2_rsp *)pSMBr); + if (rc) /* BB add auto retry on EOPNOTSUPP? */ + rc = -EIO; + else if (pSMBr->ByteCount < 40) + rc = -EIO; /* bad smb */ + else if (pFindData) { + __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); + memcpy((char *) pFindData, + (char *) &pSMBr->hdr.Protocol + + data_offset, sizeof(FILE_ALL_INFO)); + } else + rc = -ENOMEM; + } + cifs_buf_release(pSMB); + if (rc == -EAGAIN) + goto QFileInfoRetry; + return rc; +} int CIFSSMBQPathInfo(const int xid, struct cifsTconInfo *tcon, -- cgit v0.10.2 From c8634fd3115497ac311f57be9c12f993437745cf Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 12 Feb 2010 07:44:17 -0500 Subject: cifs: add a CIFSSMBUnixQFileInfo function ...to allow us to get unix attrs via filehandle. Signed-off-by: Jeff Layton Signed-off-by: Steve French diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index bf2bff1..ce9199f 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -154,6 +154,8 @@ extern int SMBQueryInformation(const int xid, struct cifsTconInfo *tcon, FILE_ALL_INFO *findData, const struct nls_table *nls_codepage, int remap); +extern int CIFSSMBUnixQFileInfo(const int xid, struct cifsTconInfo *tcon, + u16 netfid, FILE_UNIX_BASIC_INFO *pFindData); extern int CIFSSMBUnixQPathInfo(const int xid, struct cifsTconInfo *tcon, const unsigned char *searchName, diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 4ed9782..903d538 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -3399,6 +3399,75 @@ QPathInfoRetry: } int +CIFSSMBUnixQFileInfo(const int xid, struct cifsTconInfo *tcon, + u16 netfid, FILE_UNIX_BASIC_INFO *pFindData) +{ + struct smb_t2_qfi_req *pSMB = NULL; + struct smb_t2_qfi_rsp *pSMBr = NULL; + int rc = 0; + int bytes_returned; + __u16 params, byte_count; + +UnixQFileInfoRetry: + rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, + (void **) &pSMBr); + if (rc) + return rc; + + params = 2 /* level */ + 2 /* fid */; + pSMB->t2.TotalDataCount = 0; + pSMB->t2.MaxParameterCount = cpu_to_le16(4); + /* BB find exact max data count below from sess structure BB */ + pSMB->t2.MaxDataCount = cpu_to_le16(CIFSMaxBufSize); + pSMB->t2.MaxSetupCount = 0; + pSMB->t2.Reserved = 0; + pSMB->t2.Flags = 0; + pSMB->t2.Timeout = 0; + pSMB->t2.Reserved2 = 0; + pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req, + Fid) - 4); + pSMB->t2.DataCount = 0; + pSMB->t2.DataOffset = 0; + pSMB->t2.SetupCount = 1; + pSMB->t2.Reserved3 = 0; + pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION); + byte_count = params + 1 /* pad */ ; + pSMB->t2.TotalParameterCount = cpu_to_le16(params); + pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount; + pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC); + pSMB->Pad = 0; + pSMB->Fid = netfid; + pSMB->hdr.smb_buf_length += byte_count; + + rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, + (struct smb_hdr *) pSMBr, &bytes_returned, 0); + if (rc) { + cFYI(1, ("Send error in QPathInfo = %d", rc)); + } else { /* decode response */ + rc = validate_t2((struct smb_t2_rsp *)pSMBr); + + if (rc || (pSMBr->ByteCount < sizeof(FILE_UNIX_BASIC_INFO))) { + cERROR(1, ("Malformed FILE_UNIX_BASIC_INFO response.\n" + "Unix Extensions can be disabled on mount " + "by specifying the nosfu mount option.")); + rc = -EIO; /* bad smb */ + } else { + __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); + memcpy((char *) pFindData, + (char *) &pSMBr->hdr.Protocol + + data_offset, + sizeof(FILE_UNIX_BASIC_INFO)); + } + } + + cifs_buf_release(pSMB); + if (rc == -EAGAIN) + goto UnixQFileInfoRetry; + + return rc; +} + +int CIFSSMBUnixQPathInfo(const int xid, struct cifsTconInfo *tcon, const unsigned char *searchName, FILE_UNIX_BASIC_INFO *pFindData, -- cgit v0.10.2 From abab095d1fd25986b910d3c46289d8fa3582cdc5 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 12 Feb 2010 07:44:18 -0500 Subject: cifs: add cifs_revalidate_file ...to allow updating inode attributes on an existing inode by filehandle. Change mmap and llseek codepaths to use that instead of cifs_revalidate_dentry since they have a filehandle readily available. Signed-off-by: Jeff Layton Signed-off-by: Steve French diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index cf85a41..5183bc2 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -639,7 +639,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) setting the revalidate time to zero */ CIFS_I(file->f_path.dentry->d_inode)->time = 0; - retval = cifs_revalidate_dentry(file->f_path.dentry); + retval = cifs_revalidate_file(file); if (retval < 0) return (loff_t)retval; } diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 2af995c..7aa57ec 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -61,6 +61,7 @@ extern int cifs_mkdir(struct inode *, struct dentry *, int); extern int cifs_rmdir(struct inode *, struct dentry *); extern int cifs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); +extern int cifs_revalidate_file(struct file *filp); extern int cifs_revalidate_dentry(struct dentry *); extern int cifs_getattr(struct vfsmount *, struct dentry *, struct kstat *); extern int cifs_setattr(struct dentry *, struct iattr *); diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index ce9199f..39e47f4 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -104,10 +104,12 @@ extern void cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr); extern struct inode *cifs_iget(struct super_block *sb, struct cifs_fattr *fattr); +extern int cifs_get_file_info(struct file *filp); extern int cifs_get_inode_info(struct inode **pinode, const unsigned char *search_path, FILE_ALL_INFO *pfile_info, struct super_block *sb, int xid, const __u16 *pfid); +extern int cifs_get_file_info_unix(struct file *filp); extern int cifs_get_inode_info_unix(struct inode **pinode, const unsigned char *search_path, struct super_block *sb, int xid); diff --git a/fs/cifs/file.c b/fs/cifs/file.c index b90f8f2..1389f6e 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1890,11 +1890,10 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, int cifs_file_mmap(struct file *file, struct vm_area_struct *vma) { - struct dentry *dentry = file->f_path.dentry; int rc, xid; xid = GetXid(); - rc = cifs_revalidate_dentry(dentry); + rc = cifs_revalidate_file(file); if (rc) { cFYI(1, ("Validation prior to mmap failed, error=%d", rc)); FreeXid(xid); diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index f050dba..0d034a8 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -268,6 +268,31 @@ cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL; } +int cifs_get_file_info_unix(struct file *filp) +{ + int rc; + int xid; + FILE_UNIX_BASIC_INFO find_data; + struct cifs_fattr fattr; + struct inode *inode = filp->f_path.dentry->d_inode; + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct cifsTconInfo *tcon = cifs_sb->tcon; + struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; + + xid = GetXid(); + rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->netfid, &find_data); + if (!rc) { + cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); + } else if (rc == -EREMOTE) { + cifs_create_dfs_fattr(&fattr, inode->i_sb); + rc = 0; + } + + cifs_fattr_to_inode(inode, &fattr); + FreeXid(xid); + return rc; +} + int cifs_get_inode_info_unix(struct inode **pinode, const unsigned char *full_path, struct super_block *sb, int xid) @@ -469,6 +494,47 @@ cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, fattr->cf_gid = cifs_sb->mnt_gid; } +int cifs_get_file_info(struct file *filp) +{ + int rc; + int xid; + FILE_ALL_INFO find_data; + struct cifs_fattr fattr; + struct inode *inode = filp->f_path.dentry->d_inode; + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct cifsTconInfo *tcon = cifs_sb->tcon; + struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; + + xid = GetXid(); + rc = CIFSSMBQFileInfo(xid, tcon, cfile->netfid, &find_data); + if (rc == -EOPNOTSUPP || rc == -EINVAL) { + /* + * FIXME: legacy server -- fall back to path-based call? + * for now, just skip revalidating and mark inode for + * immediate reval. + */ + rc = 0; + CIFS_I(inode)->time = 0; + goto cgfi_exit; + } else if (rc == -EREMOTE) { + cifs_create_dfs_fattr(&fattr, inode->i_sb); + rc = 0; + } else if (rc) + goto cgfi_exit; + + /* + * don't bother with SFU junk here -- just mark inode as needing + * revalidation. + */ + cifs_all_info_to_fattr(&fattr, &find_data, cifs_sb, false); + fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; + fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; + cifs_fattr_to_inode(inode, &fattr); +cgfi_exit: + FreeXid(xid); + return rc; +} + int cifs_get_inode_info(struct inode **pinode, const unsigned char *full_path, FILE_ALL_INFO *pfindData, struct super_block *sb, int xid, const __u16 *pfid) @@ -1465,6 +1531,26 @@ cifs_invalidate_mapping(struct inode *inode) invalidate_remote_inode(inode); } +int cifs_revalidate_file(struct file *filp) +{ + int rc = 0; + struct inode *inode = filp->f_path.dentry->d_inode; + + if (!cifs_inode_needs_reval(inode)) + goto check_inval; + + if (CIFS_SB(inode->i_sb)->tcon->unix_ext) + rc = cifs_get_file_info_unix(filp); + else + rc = cifs_get_file_info(filp); + +check_inval: + if (CIFS_I(inode)->invalid_mapping) + cifs_invalidate_mapping(inode); + + return rc; +} + /* revalidate a dentry's inode attributes */ int cifs_revalidate_dentry(struct dentry *dentry) { -- cgit v0.10.2 From ff215713eb33c56301cf6bfec0143ddc7f22c138 Mon Sep 17 00:00:00 2001 From: Steve French Date: Tue, 9 Mar 2010 20:30:42 +0000 Subject: [CIFS] checkpatch cleanup Signed-off-by: Steve French diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 1389f6e..ca2ba7a 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -219,8 +219,8 @@ static inline int cifs_open_inode_helper(struct inode *inode, struct file *file, cFYI(1, ("inode unchanged on server")); } else { if (file->f_path.dentry->d_inode->i_mapping) { - /* BB no need to lock inode until after invalidate - since namei code should already have it locked? */ + /* BB no need to lock inode until after invalidate + since namei code should already have it locked? */ rc = filemap_write_and_wait(file->f_path.dentry->d_inode->i_mapping); if (rc != 0) CIFS_I(file->f_path.dentry->d_inode)->write_behind_rc = rc; diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 0d034a8..723daac 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -510,9 +510,9 @@ int cifs_get_file_info(struct file *filp) if (rc == -EOPNOTSUPP || rc == -EINVAL) { /* * FIXME: legacy server -- fall back to path-based call? - * for now, just skip revalidating and mark inode for - * immediate reval. - */ + * for now, just skip revalidating and mark inode for + * immediate reval. + */ rc = 0; CIFS_I(inode)->time = 0; goto cgfi_exit; -- cgit v0.10.2 From 8212cf7583a5ba5d213d9c9180be808222a2813f Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Mon, 15 Mar 2010 11:22:26 +0300 Subject: cifs: trivial white space I fixed the indent level. Signed-off-by: Dan Carpenter Signed-off-by: Steve French diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 903d538..20959be 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -500,7 +500,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses) } else if (pSMBr->hdr.WordCount == 13) { cERROR(1, ("mount failed, cifs module not built " "with CIFS_WEAK_PW_HASH support")); - rc = -EOPNOTSUPP; + rc = -EOPNOTSUPP; #endif /* WEAK_PW_HASH */ goto neg_err_exit; } else if (pSMBr->hdr.WordCount != 17) { -- cgit v0.10.2