| Start/ | End/ | |||
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| 1 | /* -*- c -*- --------------------------------------------------------------- * | |||
| 2 | * | |||
| 3 | * linux/fs/autofs/root.c | |||
| 4 | * | |||
| 5 | * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved | |||
| 6 | * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> | |||
| 7 | * Copyright 2001-2003 Ian Kent <raven@themaw.net> | |||
| 8 | * | |||
| 9 | * This file is part of the Linux kernel and is made available under | |||
| 10 | * the terms of the GNU General Public License, version 2, or at your | |||
| 11 | * option, any later version, incorporated herein by reference. | |||
| 12 | * | |||
| 13 | * ------------------------------------------------------------------------- */ | |||
| 14 | ||||
| 15 | #include <linux/capability.h> | |||
| 16 | #include <linux/errno.h> | |||
| 17 | #include <linux/stat.h> | |||
| 18 | #include <linux/param.h> | |||
| 19 | #include <linux/time.h> | |||
| 20 | #include <linux/smp_lock.h> | |||
| 21 | #include "autofs_i.h" | |||
| 22 | ||||
| 23 | static int autofs4_dir_symlink(struct inode *,struct dentry *,const char *); | |||
| 24 | static int autofs4_dir_unlink(struct inode *,struct dentry *); | |||
| 25 | static int autofs4_dir_rmdir(struct inode *,struct dentry *); | |||
| 26 | static int autofs4_dir_mkdir(struct inode *,struct dentry *,int); | |||
| 27 | static int autofs4_root_ioctl(struct inode *, struct file *,unsigned int,unsigned long); | |||
| 28 | static int autofs4_dir_open(struct inode *inode, struct file *file); | |||
| 29 | static int autofs4_dir_close(struct inode *inode, struct file *file); | |||
| 30 | static int autofs4_dir_readdir(struct file * filp, void * dirent, filldir_t filldir); | |||
| 31 | static int autofs4_root_readdir(struct file * filp, void * dirent, filldir_t filldir); | |||
| 32 | static struct dentry *autofs4_lookup(struct inode *,struct dentry *, struct nameidata *); | |||
| 33 | static int autofs4_dcache_readdir(struct file *, void *, filldir_t); | |||
| 34 | ||||
| 35 | struct file_operations autofs4_root_operations = { | |||
| 36 | .open = dcache_dir_open, | |||
| 37 | .release = dcache_dir_close, | |||
| 38 | .read = generic_read_dir, | |||
| 39 | .readdir = autofs4_root_readdir, | |||
| 40 | .ioctl = autofs4_root_ioctl, | |||
| 41 | }; | |||
| 42 | ||||
| 43 | struct file_operations autofs4_dir_operations = { | |||
| 44 | .open = autofs4_dir_open, | |||
| 45 | .release = autofs4_dir_close, | |||
| 46 | .read = generic_read_dir, | |||
| 47 | .readdir = autofs4_dir_readdir, | |||
| 48 | }; | |||
| 49 | ||||
| 50 | struct inode_operations autofs4_root_inode_operations = { | |||
| 51 | .lookup = autofs4_lookup, | |||
| 52 | .unlink = autofs4_dir_unlink, | |||
| 53 | .symlink = autofs4_dir_symlink, | |||
| 54 | .mkdir = autofs4_dir_mkdir, | |||
| 55 | .rmdir = autofs4_dir_rmdir, | |||
| 56 | }; | |||
| 57 | ||||
| 58 | struct inode_operations autofs4_dir_inode_operations = { | |||
| 59 | .lookup = autofs4_lookup, | |||
| 60 | .unlink = autofs4_dir_unlink, | |||
| 61 | .symlink = autofs4_dir_symlink, | |||
| 62 | .mkdir = autofs4_dir_mkdir, | |||
| 63 | .rmdir = autofs4_dir_rmdir, | |||
| 64 | }; | |||
| 65 | ||||
| 0 | 0 | - | 66 | static int autofs4_root_readdir(struct file *file, void *dirent, |
| 67 | filldir_t filldir) | |||
| 68 | { | |||
| 69 | struct autofs_sb_info *sbi = autofs4_sbi(file->f_dentry->d_sb); | |||
| 70 | int oz_mode = autofs4_oz_mode(sbi); | |||
| 71 | ||||
| 72 | DPRINTK("called, filp->f_pos = %lld", file->f_pos); | |||
| 0 | 0 | - | 72 | do-while (0) |
| 73 | ||||
| 74 | /* | |||
| 75 | * Don't set reghost flag if: | |||
| 76 | * 1) f_pos is larger than zero -- we've already been here. | |||
| 77 | * 2) we haven't even enabled reghosting in the 1st place. | |||
| 78 | * 3) this is the daemon doing a readdir | |||
| 79 | */ | |||
| 0 | 0 | - | 80 | if (oz_mode && file->f_pos == 0 && sbi->reghost_enabled) |
| 0 | - | 80 | T && T && T | |
| 0 | - | 80 | T && T && F | |
| 0 | - | 80 | T && F && _ | |
| 0 | - | 80 | F && _ && _ | |
| 81 | sbi->needs_reghost = 1; | |||
| 82 | ||||
| 83 | DPRINTK("needs_reghost = %d", sbi->needs_reghost); | |||
| 0 | 0 | - | 83 | do-while (0) |
| 84 | ||||
| 0 | - | 85 | return autofs4_dcache_readdir(file, dirent, filldir); | |
| 86 | } | |||
| 87 | ||||
| 88 | /* Update usage from here to top of tree, so that scan of | |||
| 89 | top-level directories will give a useful result */ | |||
| 0 | 0 | - | 90 | static void autofs4_update_usage(struct vfsmount *mnt, struct dentry *dentry) |
| 91 | { | |||
| 92 | struct dentry *top = dentry->d_sb->s_root; | |||
| 93 | ||||
| 94 | spin_lock(&dcache_lock); | |||
| 94 | do | |||
| 0 | 0 | - | 94 | do-while (0) |
| 0 | 0 | - | 94 | do-while (0) |
| 0 | 0 | - | 95 | for(; dentry != top; dentry = dentry->d_parent) { |
| 96 | struct autofs_info *ino = autofs4_dentry_ino(dentry); | |||
| 97 | ||||
| 0 | 0 | - | 98 | if (ino) { |
| 99 | touch_atime(mnt, dentry); | |||
| 100 | ino->last_used = jiffies; | |||
| 101 | } | |||
| 102 | } | |||
| 103 | spin_unlock(&dcache_lock); | |||
| 103 | do | |||
| 0 | 0 | - | 103 | do-while (0) |
| 0 | 0 | - | 103 | do-while (0) |
| 104 | } | |||
| 105 | ||||
| 106 | /* | |||
| 107 | * From 2.4 kernel readdir.c | |||
| 108 | */ | |||
| 0 | 0 | - | 109 | static int autofs4_dcache_readdir(struct file * filp, void * dirent, filldir_t filldir) |
| 110 | { | |||
| 111 | int i; | |||
| 112 | struct dentry *dentry = filp->f_dentry; | |||
| 113 | ||||
| 114 | i = filp->f_pos; | |||
| 115 | switch (i) { | |||
| 0 | - | 116 | case 0: | |
| 0 | 0 | - | 117 | if (filldir(dirent, ".", 1, i, dentry->d_inode->i_ino, DT_DIR) < 0) |
| 0 | - | 118 | break; | |
| 119 | i++; | |||
| 120 | filp->f_pos++; | |||
| 121 | /* fallthrough */ | |||
| 0 | - | 122 | case 1: | |
| 0 | 0 | - | 123 | if (filldir(dirent, "..", 2, i, dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) |
| 0 | - | 124 | break; | |
| 125 | i++; | |||
| 126 | filp->f_pos++; | |||
| 127 | /* fallthrough */ | |||
| 0 | - | 128 | default: { | |
| 129 | struct list_head *list; | |||
| 130 | int j = i-2; | |||
| 131 | ||||
| 132 | spin_lock(&dcache_lock); | |||
| 132 | do | |||
| 0 | 0 | - | 132 | do-while (0) |
| 0 | 0 | - | 132 | do-while (0) |
| 133 | list = dentry->d_subdirs.next; | |||
| 134 | ||||
| 0 | 0 | - | 135 | for (;;) { |
| 0 | 0 | - | 136 | if (list == &dentry->d_subdirs) { |
| 137 | spin_unlock(&dcache_lock); | |||
| 137 | do | |||
| 0 | 0 | - | 137 | do-while (0) |
| 0 | 0 | - | 137 | do-while (0) |
| 0 | - | 138 | return 0; | |
| 139 | } | |||
| 0 | 0 | - | 140 | if (!j) |
| 0 | - | 141 | break; | |
| 142 | j--; | |||
| 143 | list = list->next; | |||
| 144 | } | |||
| 145 | ||||
| 0 | 0 | - | 146 | while(1) { |
| 147 | struct dentry *de = list_entry(list, | |||
| 148 | struct dentry, d_u.d_child); | |||
| 149 | ||||
| 0 | 0 | - | 150 | if (!d_unhashed(de) && de->d_inode) { |
| 0 | - | 150 | T && T | |
| 0 | - | 150 | T && F | |
| 0 | - | 150 | F && _ | |
| 151 | spin_unlock(&dcache_lock); | |||
| 151 | do | |||
| 0 | 0 | - | 151 | do-while (0) |
| 0 | 0 | - | 151 | do-while (0) |
| 0 | 0 | - | 152 | if (filldir(dirent, de->d_name.name, de->d_name.len, filp->f_pos, de->d_inode->i_ino, DT_UNKNOWN) < 0) |
| 0 | - | 153 | break; | |
| 154 | spin_lock(&dcache_lock); | |||
| 154 | do | |||
| 0 | 0 | - | 154 | do-while (0) |
| 0 | 0 | - | 154 | do-while (0) |
| 155 | } | |||
| 156 | filp->f_pos++; | |||
| 157 | list = list->next; | |||
| 0 | 0 | - | 158 | if (list != &dentry->d_subdirs) |
| 0 | - | 159 | continue; | |
| 160 | spin_unlock(&dcache_lock); | |||
| 160 | do | |||
| 0 | 0 | - | 160 | do-while (0) |
| 0 | 0 | - | 160 | do-while (0) |
| 0 | - | 161 | break; | |
| 162 | } | |||
| 163 | } | |||
| 164 | } | |||
| 0 | - | 165 | return 0; | |
| 166 | } | |||
| 167 | ||||
| 0 | 0 | - | 168 | static int autofs4_dir_open(struct inode *inode, struct file *file) |
| 169 | { | |||
| 170 | struct dentry *dentry = file->f_dentry; | |||
| 171 | struct vfsmount *mnt = file->f_vfsmnt; | |||
| 172 | struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); | |||
| 173 | int status; | |||
| 174 | ||||
| 175 | DPRINTK("file=%p dentry=%p %.*s", | |||
| 0 | 0 | - | 175 | do-while (0) |
| 176 | file, dentry, dentry->d_name.len, dentry->d_name.name); | |||
| 177 | ||||
| 0 | 0 | - | 178 | if (autofs4_oz_mode(sbi)) |
| 0 | - | 179 | goto out; | |
| 180 | ||||
| 0 | 0 | - | 181 | if (autofs4_ispending(dentry)) { |
| 182 | DPRINTK("dentry busy"); | |||
| 0 | 0 | - | 182 | do-while (0) |
| 0 | - | 183 | return -EBUSY; | |
| 184 | } | |||
| 185 | ||||
| 0 | 0 | - | 186 | if (!d_mountpoint(dentry) && dentry->d_op && dentry->d_op->d_revalidate) { |
| 0 | - | 186 | T && T && T | |
| 0 | - | 186 | T && T && F | |
| 0 | - | 186 | T && F && _ | |
| 0 | - | 186 | F && _ && _ | |
| 187 | struct nameidata nd; | |||
| 188 | int empty; | |||
| 189 | ||||
| 190 | /* In case there are stale directory dentrys from a failed mount */ | |||
| 191 | spin_lock(&dcache_lock); | |||
| 191 | do | |||
| 0 | 0 | - | 191 | do-while (0) |
| 0 | 0 | - | 191 | do-while (0) |
| 192 | empty = list_empty(&dentry->d_subdirs); | |||
| 193 | spin_unlock(&dcache_lock); | |||
| 193 | do | |||
| 0 | 0 | - | 193 | do-while (0) |
| 0 | 0 | - | 193 | do-while (0) |
| 194 | ||||
| 0 | 0 | - | 195 | if (!empty) |
| 196 | d_invalidate(dentry); | |||
| 197 | ||||
| 198 | nd.dentry = dentry; | |||
| 199 | nd.mnt = mnt; | |||
| 200 | nd.flags = LOOKUP_DIRECTORY; | |||
| 201 | status = (dentry->d_op->d_revalidate)(dentry, &nd); | |||
| 202 | ||||
| 0 | 0 | - | 203 | if (!status) |
| 0 | - | 204 | return -ENOENT; | |
| 205 | } | |||
| 206 | ||||
| 0 | 0 | - | 207 | if (d_mountpoint(dentry)) { |
| 208 | struct file *fp = NULL; | |||
| 209 | struct vfsmount *fp_mnt = mntget(mnt); | |||
| 210 | struct dentry *fp_dentry = dget(dentry); | |||
| 211 | ||||
| 0 | 0 | - | 212 | if (!autofs4_follow_mount(&fp_mnt, &fp_dentry)) { |
| 213 | dput(fp_dentry); | |||
| 214 | mntput(fp_mnt); | |||
| 0 | - | 215 | return -ENOENT; | |
| 216 | } | |||
| 217 | ||||
| 218 | fp = dentry_open(fp_dentry, fp_mnt, file->f_flags); | |||
| 219 | status = PTR_ERR(fp); | |||
| 0 | 0 | - | 220 | if (IS_ERR(fp)) { |
| 221 | file->private_data = NULL; | |||
| 0 | - | 222 | return status; | |
| 223 | } | |||
| 224 | file->private_data = fp; | |||
| 225 | } | |||
| 226 | out: | |||
| 0 | - | 227 | return 0; | |
| 228 | } | |||
| 229 | ||||
| 0 | 0 | - | 230 | static int autofs4_dir_close(struct inode *inode, struct file *file) |
| 231 | { | |||
| 232 | struct dentry *dentry = file->f_dentry; | |||
| 233 | struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); | |||
| 234 | ||||
| 235 | DPRINTK("file=%p dentry=%p %.*s", | |||
| 0 | 0 | - | 235 | do-while (0) |
| 236 | file, dentry, dentry->d_name.len, dentry->d_name.name); | |||
| 237 | ||||
| 0 | 0 | - | 238 | if (autofs4_oz_mode(sbi)) |
| 0 | - | 239 | goto out; | |
| 240 | ||||
| 0 | 0 | - | 241 | if (autofs4_ispending(dentry)) { |
| 242 | DPRINTK("dentry busy"); | |||
| 0 | 0 | - | 242 | do-while (0) |
| 0 | - | 243 | return -EBUSY; | |
| 244 | } | |||
| 245 | ||||
| 0 | 0 | - | 246 | if (d_mountpoint(dentry)) { |
| 247 | struct file *fp = file->private_data; | |||
| 248 | ||||
| 0 | 0 | - | 249 | if (!fp) |
| 0 | - | 250 | return -ENOENT; | |
| 251 | ||||
| 252 | filp_close(fp, current->files); | |||
| 253 | file->private_data = NULL; | |||
| 254 | } | |||
| 255 | out: | |||
| 0 | - | 256 | return 0; | |
| 257 | } | |||
| 258 | ||||
| 0 | 0 | - | 259 | static int autofs4_dir_readdir(struct file *file, void *dirent, filldir_t filldir) |
| 260 | { | |||
| 261 | struct dentry *dentry = file->f_dentry; | |||
| 262 | struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); | |||
| 263 | int status; | |||
| 264 | ||||
| 265 | DPRINTK("file=%p dentry=%p %.*s", | |||
| 0 | 0 | - | 265 | do-while (0) |
| 266 | file, dentry, dentry->d_name.len, dentry->d_name.name); | |||
| 267 | ||||
| 0 | 0 | - | 268 | if (autofs4_oz_mode(sbi)) |
| 0 | - | 269 | goto out; | |
| 270 | ||||
| 0 | 0 | - | 271 | if (autofs4_ispending(dentry)) { |
| 272 | DPRINTK("dentry busy"); | |||
| 0 | 0 | - | 272 | do-while (0) |
| 0 | - | 273 | return -EBUSY; | |
| 274 | } | |||
| 275 | ||||
| 0 | 0 | - | 276 | if (d_mountpoint(dentry)) { |
| 277 | struct file *fp = file->private_data; | |||
| 278 | ||||
| 0 | 0 | - | 279 | if (!fp) |
| 0 | - | 280 | return -ENOENT; | |
| 281 | ||||
| 0 | 0 | - | 282 | if (!fp->f_op || !fp->f_op->readdir) |
| 0 | - | 282 | T || _ | |
| 0 | - | 282 | F || T | |
| 0 | - | 282 | F || F | |
| 0 | - | 283 | goto out; | |
| 284 | ||||
| 285 | status = vfs_readdir(fp, filldir, dirent); | |||
| 286 | file->f_pos = fp->f_pos; | |||
| 0 | 0 | - | 287 | if (status) |
| 288 | autofs4_copy_atime(file, fp); | |||
| 0 | - | 289 | return status; | |
| 290 | } | |||
| 291 | out: | |||
| 0 | - | 292 | return autofs4_dcache_readdir(file, dirent, filldir); | |
| 293 | } | |||
| 294 | ||||
| 0 | 0 | - | 295 | static int try_to_fill_dentry(struct vfsmount *mnt, struct dentry *dentry, int flags) |
| 296 | { | |||
| 297 | struct super_block *sb = mnt->mnt_sb; | |||
| 298 | struct autofs_sb_info *sbi = autofs4_sbi(sb); | |||
| 299 | struct autofs_info *de_info = autofs4_dentry_ino(dentry); | |||
| 300 | int status = 0; | |||
| 301 | ||||
| 302 | /* Block on any pending expiry here; invalidate the dentry | |||
| 303 | when expiration is done to trigger mount request with a new | |||
| 304 | dentry */ | |||
| 0 | 0 | - | 305 | if (de_info && (de_info->flags & AUTOFS_INF_EXPIRING)) { |
| 0 | - | 305 | T && (T) | |
| 0 | - | 305 | T && (F) | |
| 0 | - | 305 | F && (_) | |
| 306 | DPRINTK("waiting for expire %p name=%.*s", | |||
| 0 | 0 | - | 306 | do-while (0) |
| 307 | dentry, dentry->d_name.len, dentry->d_name.name); | |||
| 308 | ||||
| 309 | status = autofs4_wait(sbi, dentry, NFY_NONE); | |||
| 310 | ||||
| 311 | DPRINTK("expire done status=%d", status); | |||
| 0 | 0 | - | 311 | do-while (0) |
| 312 | ||||
| 313 | /* | |||
| 314 | * If the directory still exists the mount request must | |||
| 315 | * continue otherwise it can't be followed at the right | |||
| 316 | * time during the walk. | |||
| 317 | */ | |||
| 318 | status = d_invalidate(dentry); | |||
| 0 | 0 | - | 319 | if (status != -EBUSY) |
| 0 | - | 320 | return 0; | |
| 321 | } | |||
| 322 | ||||
| 323 | DPRINTK("dentry=%p %.*s ino=%p", | |||
| 0 | 0 | - | 323 | do-while (0) |
| 324 | dentry, dentry->d_name.len, dentry->d_name.name, dentry->d_inode); | |||
| 325 | ||||
| 326 | /* Wait for a pending mount, triggering one if there isn't one already */ | |||
| 0 | 0 | - | 327 | if (dentry->d_inode == NULL) { |
| 328 | DPRINTK("waiting for mount name=%.*s", | |||
| 0 | 0 | - | 328 | do-while (0) |
| 329 | dentry->d_name.len, dentry->d_name.name); | |||
| 330 | ||||
| 331 | status = autofs4_wait(sbi, dentry, NFY_MOUNT); | |||
| 332 | ||||
| 333 | DPRINTK("mount done status=%d", status); | |||
| 0 | 0 | - | 333 | do-while (0) |
| 334 | ||||
| 0 | 0 | - | 335 | if (status && dentry->d_inode) |
| 0 | - | 335 | T && T | |
| 0 | - | 335 | T && F | |
| 0 | - | 335 | F && _ | |
| 0 | - | 336 | return 0; /* Try to get the kernel to invalidate this dentry */ | |
| 337 | ||||
| 338 | /* Turn this into a real negative dentry? */ | |||
| 0 | 0 | - | 339 | if (status == -ENOENT) { |
| 340 | dentry->d_time = jiffies + AUTOFS_NEGATIVE_TIMEOUT; | |||
| 341 | spin_lock(&dentry->d_lock); | |||
| 341 | do | |||
| 0 | 0 | - | 341 | do-while (0) |
| 0 | 0 | - | 341 | do-while (0) |
| 342 | dentry->d_flags &= ~DCACHE_AUTOFS_PENDING; | |||
| 343 | spin_unlock(&dentry->d_lock); | |||
| 343 | do | |||
| 0 | 0 | - | 343 | do-while (0) |
| 0 | 0 | - | 343 | do-while (0) |
| 0 | - | 344 | return 1; | |
| 0 | 0 | - | 345 | } else if (status) { |
| 346 | /* Return a negative dentry, but leave it "pending" */ | |||
| 0 | - | 347 | return 1; | |
| 348 | } | |||
| 349 | /* Trigger mount for path component or follow link */ | |||
| 350 | } else if (flags & (LOOKUP_CONTINUE | LOOKUP_DIRECTORY) || | |||
| 0 | 0 | - | 351 | current->link_count) { |
| 0 | - | 351 | T || _ | |
| 0 | - | 351 | F || T | |
| 0 | - | 351 | F || F | |
| 352 | DPRINTK("waiting for mount name=%.*s", | |||
| 0 | 0 | - | 352 | do-while (0) |
| 353 | dentry->d_name.len, dentry->d_name.name); | |||
| 354 | ||||
| 355 | spin_lock(&dentry->d_lock); | |||
| 355 | do | |||
| 0 | 0 | - | 355 | do-while (0) |
| 0 | 0 | - | 355 | do-while (0) |
| 356 | dentry->d_flags |= DCACHE_AUTOFS_PENDING; | |||
| 357 | spin_unlock(&dentry->d_lock); | |||
| 357 | do | |||
| 0 | 0 | - | 357 | do-while (0) |
| 0 | 0 | - | 357 | do-while (0) |
| 358 | status = autofs4_wait(sbi, dentry, NFY_MOUNT); | |||
| 359 | ||||
| 360 | DPRINTK("mount done status=%d", status); | |||
| 0 | 0 | - | 360 | do-while (0) |
| 361 | ||||
| 0 | 0 | - | 362 | if (status) { |
| 363 | spin_lock(&dentry->d_lock); | |||
| 363 | do | |||
| 0 | 0 | - | 363 | do-while (0) |
| 0 | 0 | - | 363 | do-while (0) |
| 364 | dentry->d_flags &= ~DCACHE_AUTOFS_PENDING; | |||
| 365 | spin_unlock(&dentry->d_lock); | |||
| 365 | do | |||
| 0 | 0 | - | 365 | do-while (0) |
| 0 | 0 | - | 365 | do-while (0) |
| 0 | - | 366 | return 0; | |
| 367 | } | |||
| 368 | } | |||
| 369 | ||||
| 370 | /* We don't update the usages for the autofs daemon itself, this | |||
| 371 | is necessary for recursive autofs mounts */ | |||
| 0 | 0 | - | 372 | if (!autofs4_oz_mode(sbi)) |
| 373 | autofs4_update_usage(mnt, dentry); | |||
| 374 | ||||
| 375 | spin_lock(&dentry->d_lock); | |||
| 375 | do | |||
| 0 | 0 | - | 375 | do-while (0) |
| 0 | 0 | - | 375 | do-while (0) |
| 376 | dentry->d_flags &= ~DCACHE_AUTOFS_PENDING; | |||
| 377 | spin_unlock(&dentry->d_lock); | |||
| 377 | do | |||
| 0 | 0 | - | 377 | do-while (0) |
| 0 | 0 | - | 377 | do-while (0) |
| 0 | - | 378 | return 1; | |
| 379 | } | |||
| 380 | ||||
| 381 | /* | |||
| 382 | * Revalidate is called on every cache lookup. Some of those | |||
| 383 | * cache lookups may actually happen while the dentry is not | |||
| 384 | * yet completely filled in, and revalidate has to delay such | |||
| 385 | * lookups.. | |||
| 386 | */ | |||
| 0 | 0 | - | 387 | static int autofs4_revalidate(struct dentry * dentry, struct nameidata *nd) |
| 388 | { | |||
| 389 | struct inode * dir = dentry->d_parent->d_inode; | |||
| 390 | struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb); | |||
| 391 | int oz_mode = autofs4_oz_mode(sbi); | |||
| 392 | int flags = nd ? nd->flags : 0; | |||
| 0 | 0 | - | 392 | ternary-?: nd |
| 393 | int status = 1; | |||
| 394 | ||||
| 395 | /* Pending dentry */ | |||
| 0 | 0 | - | 396 | if (autofs4_ispending(dentry)) { |
| 0 | 0 | - | 397 | if (!oz_mode) |
| 398 | status = try_to_fill_dentry(nd->mnt, dentry, flags); | |||
| 0 | ||||